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Revision of the !!iT£.\I\I of Ameiica ^oitii of Mexico.

Insects of the
Family SlaphyUnidae, order Cohoptera.

Bv Tiios. L. Casey, Lieut, of Eiig'rs.

MEMBHll OF THE ENTOMOLOOICAL SOCIETY OE FUANCE,

TitK present revision liiis been written in order to carry our knowl-
edge of the immense family Stapliylinidae one step further toward a
state of approximate completeness, and to close a gap which has loiij
been left untouched, on account of the great number of species in-
volved, and because of tlieir uniformity, small size, and apparent
monotony. Large collections of material have been accumulating for
the last fifty years, until the number of species represented has b(;come
truly immense, and is yearly increasing; it is, therefore, in addition,
to make at least an attempt to classify and describe such species as
we now have rejiresented in our cabinets, not only to save them from
piolonged oblivion by reason of possible destruction, but to render
easier the task of keeping up in future with the collectors, that the
present work is presented to the entomological world ; not, however,
without many misgivings on the part of the author.

The filling of the above-mentioned gap in the series will, in con-
junction with a work of similar scope upon tiie Philonthi, already
published by Dr. Geo. IL Horn, of Philadel[ihia, render our knowU m^00'
edge of the North American Stapliylinidae outside of the Aleocharini,
much more satisfactory. It is true there are in such genera as Tro-
gophlrtius, Bledius, and many others, a large number of species still
undescribed, but the genera have for the most part been investigated,
and proper methods of classification generally indicated, so that the
task will in these cases consist of the mere description of new specii...
and their interpolation in the tables. ^

Stenini. 1

2

NORTH AMKRICAN

For tlie great mass of material which lias been under esaminatioii,
aniountiiig in all to nearly two thousand s[ieeiniens, I am indebted
first to 3Iessrs. E. A. Schwarz and 11. G. IFubhard, wlio kindly placed
their entire collection at my disposal. Tiiis is a most snrprisiiiff ag-
gregate of these small insects, collected maiidy in the Lake Sn|)erior
Kegion ; also at Detroit, ]Mich., Cand)ridge, 3Iass., at various points
in the Veninsula of Florida, at Columbus, Texas, and in Colora<lo ;
besides others in the same cabinet collected by Mr. Morrison in the
Lake Talioe Region of Nevada, and in 'Washington Territory. Pro-
bably four-Hfths of tlie entire number of species here described are
due to the scientilic collecting of these Coleopterists. I am also greatly
indebted to the late Dr. J. L. LeConte, who, a siiort time before his
death, placed his entire set of this tribe in my hands. This collection
is made up principally of a considerable series of specimens, collected
by the late Mr. G. 11. Crotch in widely separated points of California,
in Britisli Columbia, and in Vancouver Island, and also contains
large donations from the cabinet of Messrs. Hubbard and Schwarz,
as well as a smaller number gathered together from other sources.

To Mr. J. Pettit, of Grimsby, Ontario, I owe my best thanks for a
large collection in alcohol, made by himself in that part of Canada
immediately about his home ; and I am also under obligations to Dr.
G. II. Horn, of Philadelphia, and INIr. C. "V. IMey, of Washington,
for small sets of specimens, being all that their cabinets chanced to
contain at the time.

In conclusion, I cannot fail to express my thanks to M. Aug. Salle,
of Paris, for a type collection of the more common European species
witli which that distinguished entomologist most kindly answered my
request ; they have been of great use in determining the identity of
teveral species.

It will be seen, upon consulting the map of North America, and
noting the several localities given above, that the extensive region
abo'it the Great Salt Lake, and thence stretching in a broad belt, em-
bracing Lakes Winnipeg, Athabaska, and Great Slave, as well as
the entire region of ^abrador about Hudson's Bay, and the Missis-
sippi Valley from the source of the river to its mouth in Louisiana,
are almost wholly unrepresented in the collections which are before
me. Afi it is apparent that a large number of species are quite local
in habitat, many new ones will undoubtedly be brought to light when
these vast regions are sufficiently explored. Until they shall have
been collected over, it must be quite useless to treat exhaustively of
geographical distribution. It may be stated, however, that, as a rule,

COLEOPTEUA.

8

tlie northern rejiioiis are tlie true home of the Stenini, and liere
they exist in iir()(li;j;ioiis variety and number?. As we go soutli the
species and individuals become much less numerous, until tinally, in
the West India Islands, there is, according to Mr. Schwarz, but one
species at present known. This rule does not, however, apply strictly
throughout, and there are many species described from Mexico and
tropical South America, but in these cases, if I am correctly informed,
they are generally found in the mountainous districts, and consequently
in a climate more temperate in its nature tlian that of the surround-
ing regions.

The species of the Atlantic seaboard are generally distinct from
those inhabiting the great internal lake region, and both these in turn
differ, in general, from those of the Pacific coast and Alaska. The
speci<,'s from California and N(;vada have, as a group, a somewhat
difl'erent appearance from the Eastern species, being generally robust
and more depressed, with smaller heads and longer elytra. On the
other hand, a few forms, as Juno (Fab.), semicolon Lee, and styyicns
Say, have a very wide range of distribution, and several are known
to be quite cosmopolitan.

It will be seen, on comparing our fauna in this group with that of
Europe, that they differ decidedly in the relative proportions of si)ccies
with simple tarsi and those in which the fourth joint is bilobed, or,
according to the divisions here adopted, in the genera Stenus and
Areus respectively.

Philadelphia, Aug. 10, 1884.

STENINI.

General Ciiahacters.

Head variable in size, usually large and relatively much wider
than long. Eyes large, strongly convex, occupying nearly the entire
side of the head, sometimes sparsely and minutely setose, always
finely reticulated ; lenses not percejitibly convex. Labruni large,
corneous, strongly, evenly and broadly arcuate anteriorly ; entire
surface rapidly declivous, conical. Interocular surface variable in
form, generally more or less depressed, sometimes, however, feebly
convex ; generally having two longitudinal sulcations, which are
slightly convergent anteriorly, the intermediate surface being more
or less convex and prominent ; rarely the sulcations and longitudinal

4

NOHTII AMEUICAN

elevation are entirely absent, and the surface between the eyes evenly
tlut or curved tliroiigliout. Antennae varying but sligiitly, 11 -jointed,
sunu'tinies rather long and strongly clubbed (Dianous), in two species
(sub-gen. IMutinus) long and very feebly enlarged toward the tip,
generally distinctly clubbed and slightly longer than the width of
head; first two joints always more robust than the funicle, inserted
upon the frcuit under slight tubcrculations of the up|)er surface,
^[axillary palpi generally very well devi'lo|)e(l, first joint shortest and
almost invariably palest in color, third joint longest, more or less
strongly and gradually enlarged toward the tip, fourth extremely
minute, generally spinous, acute, and seldom visible, exce|)t under
favoi'able conditions anil under the high powers ol' the microscope.
Labial palpi very small, second joint very robust, third spiniform and
minute. Maxillae short, lobes membranous toward tip, where they
are densely and coarsely ciliate. Mentum trai)ezoidal, nearly trans-
versely truncate anteriorly, having upon its exposed surface a strongly
elevated, triangular process, separated from the base of the mentum
by a transverse, curved canaliculation ; apex of the triangle acute
and generally projecting slightly beyond the anterior margin of the
mentum; sides of triangle generally incurvate ; the mentum usually
bears s<n-eral setae ii-regularly disj)Osed. Ligula membranous. ^lan-
dibles long, arcuate, acicular toward the tip, which is very acute;
having internally near the apex, a long, very acute, recumbent tooth,
which, however, is sometimes shorter and robust.

I'rothorax usually more or less elongated, always strongly convex,
and sometimes sub-cylindrical, often longitudinally canaliculated, and
more or less tuberculate at the base.

Elytra wider than the i)rothorax, generally longer than wide,
moderately convex, usually more or less impressed along the suture,
more particularly toward the base, also often imi)ressed near the
humeri, thus giving the appearance of a slight longitudinal tubercula-
tion near the middle of the base ot each elytron ; together broadly
and more or less feebly emargiiuite behind ; sides more or less diver-
gent posteriorly, generally slightly arcuate.

Abdominal segments seven in number, usually decreasing in width
posteriorly, sometimes (^Areus advena), with the fourth and fifth seg-
ments wider than the first and second. P^ach dorsal segment has at
the base, a transverse elevated ridge, which generally has several
cusped prolongations posteriorly.

Legs variable in length, generally rather long and somewhat slender,
always pubescent. Tibiae usually nearly equal in thickness through-

COLEOI'TEKA. 0

out, and feebly sigmoid, unarmed, liiiving nt the tip a dense fringe of
very short cinereous setae. Tarsi varying greatly in length, as is also
the case witli the relative lengtlis of tiie joints, .O-jointed, having all
the joints normally cylindrical, or having one, sometimes two or three
joints sliglitly enlarged or bilobed ; strongly pubescent beneath ;
claws appendiculate, rather small, simple or nearly so.

Anterior coxae small, siib-conical, sliglitly prominent ; intermediate
slightly separat(;d, posterior conical.

Prosternuin always punctate, generally having longer pubescence
than any other portion of the body.

Entire body |)unctate, punctures never absent, ahvays very distinct,
generally more or less ct)alescent, giving a very diversilied character
to the sculptiu'c.

Body generally winged, sometimes apterous, generally of a deep
black, sometimes having a sliglit metallic lustre. Legs sometimes
puler. P^Iytra rarely ornamented with two orange-colored spots.

Pubescence always present, sometimes very prominent and long, in
other cases extremely sparse and short, generally cinereous, fulvo- or
flavo-cinereous, or flavate, sometimes pale piceous, always setiform
and more or less erect.

The insects composing this group are all small, generally minute ;
their appearance is very distinct, and there is no possibility of mis-
taking them, tlie very hirge eyes reminding ns in some cases of Cicin-
dela in miniature. Tlieir uniformly black color and deeply sculptured
integuments isolate them completely from any other of the family
groups.

Their habits are very variable ; the movements of some are rapid,
of others rather sluggish, some running continuously for long dis-
tances, others halting every few paces like the common house-fly ;
some are found on the muddy or sandy banks of ponds or streams,
running swiftly in the hot sunsliine ; others are to be met with only
in the cool recesses of moss or debris cast up by the waves ; otliers
again occur only under the bark of old logs. All are probably car-
nivorous, capturing their prey alive like most of the Carabidae, and
are not to be met with near carrion or excrements, except, perhaps,
in order to devour some of the numerous minute insects always
swarming about such pabulum.

Regarding the protrusion of the ligula with its attendant para-
glossae, it can only be said that in our species it is a very rare con-

6 NOUTII AMKKICAN

ditioii ; iimong tlie multitii<U! cxaniincd I liiiv(! only rioted it in three
Bpecies, Ausfini, niillvpunis, and ninbratiUs, nnd then in but one
8|)(!cim('n of f'iicli. It is cciiainly a very siM-|)rising pliciiDmcnon, and
everytliinj^ said coitecrning it must he more or less opinionalive ; as
fur as I iiave hecn abh- to perceive, it is purely aecidentul.

The structure of the meiitum has been very singularly mistaken by
Ericlison, that author, usually so accurate, stating that the part is
triangular in outline ; this is to be accounted for, from the fact that
the mentum is generally deeply seated among the oral organs, only
the triarigular carination of its exposed surface being clearly visible;
this was undoubtedly mistaken for the entire mentum, althougli it is
difficult to understand how its form could have been overlooked during
the i)rocess of dissection.

It will be seen that I have departed from the usual mode of treat-
ing the genus Stenus, by dividing it into two genera, according as the
tarsal joints are simple or bilobed. This will i)robably meet with
opposition and perhaps be totally discarded ; I have therefore not
repeated specific names in the new genus, so that they can be united
without causing confusion. Most of the species of Areus can be
recognized at a glance, without examining the tarsi, indicating a
more or less natural division ; and for those species which may be
considered connecting links, the propriety can be no less than that
which warrants the continuance of many genera of Carabidae, as, for
instiince, 8elenophorus. There is no species in our fauna which
cannot be placed at once in its j)roper genus, and the division is
certainly to be recommended on the score of convenience, having in
mind the fact that generic limits miist always be more or less arbi-
trary.

In our fauna the genus Areus is much less homogeneous than Stenus,
having forms such as advena, megalops, and Sayi, which may with
further study be considered as possessing characters of generic value.
In Stenus, when the third or fourth ventral segment is modified in
the male, the fifth is invariably affected, while in Areus, the second,
third, and fourth segments are often modified, when the fifth is per-
fectly normal. ., •• ■

Explanatory Notes.

In a group in which the species are very closely related, long and full
descriptions are a necessity, and I have perferred to make each description
complete in itself, and all of like construction. To save time in comparisons,
similar parts are defined at corresponding places In each. This form is the

COLEOl'TKnA.

rt>siilt of consiili'raMp iiiooiivt'iiii'iice, cxjicriciiccd in coufiiilting several work^
where the descriiiti)!) of one species refers to that of anotlier, and this in turn
often to a third, thus neoessitatinj; a larjje amount of readinj,' and referenco
lieforn tlie full description is readied. Althougli, by tiie nietiiod ]iroposed,
there must be a lar<;e amount of rejK-tition, it is lioped that tlie convenience
in liavin;; all tin- i)arts of a des(!ripti<in under its own headiui^, will repay
the ailditional labor. The descriptions have invariably been taken from
iiialea, when present, unless the contrary is stated.

In dericribiii);; the sexual modifications, various terms are employed, which
it may be well to explain as follows : —

EimtrijiiMle., — Tliis term is applied to an abrupt discontinuity of an edge,
the line joining; the two points of discontinuity being rei-ntrant, and niori> or
less broadly rounded, A certain latitude is allowed in the greater or less
prominenoo of the exterior angles, they being in some cases slightly rounded,
in others very prominent, acute, and ])rojecting, and also in the degree of
curvature of the line forming the reentrant ; this, though in the great
majority of cases very broadly rounded, may in certain instances be rather
acutely so, which is particularly the condition, when the emargination
approaches in configuration the more or less triangular notch known as an
incisure.

Sinuate. — AVhen the lino bounding the vertex of a segment is uninterrupt-
edly curved throughout, but reentrant in the middle, it will be designated
by this term. In this ease the reentrant jjortion is called the sinus, and tin?
two lat(!ral rounded projections the apices. Comparisons are fre(jU(!iitly
drawn between the degrees of curvature of the sinus and apices, as will be
seen subsequently, and will be understood to refer to the ]ioints when* the
curvature is a maximum, or at th<! bottom of the sinus and tips of tlie apices.
If a right line bo imagined drawn tangent to the apices, the distance from
it to the bottom of the sinus will represent the depth of th<! latter, and the
distance between the jKiints of tangency its width ; the same rule is ajipli-
cable to the measurement of all notches and emarginations.

ImtKrd. — When the emargination takes the form of a triangular notch, this
term will be applicable. The anterior angle is called the angle at the vertex,
anterior angle, or sinijjly the angle of the incisure; the points at which the
posterior edge of the segment becomes interrupted to form the notch are
designated the exterior angles. The sides of the notch are generally straight,
and should always be so understood, unless the contrary is expressly stated,
and a slight latitude is allowed, in that all the angles may be slightly
rounded, and the sides sometimes arcuate or sinuate ; the former is very rare,
but occurs in the genus Areus.

Biluhed, — This term I have applied when the tip of a segment is emarginate,
the notch being a perfect cusp in outline, and the sides or arms being widely
divergent and evenly curvate. We have in this case the two uninti^rrupt-
edly rounded apices, as in the instances cited under the term sinuate ; but
here the edge is acutely notched in the middle. The only latitude allowed
in this instance is that the cusp inay in certain forms be narrowly rounded ;
these cases are distinctly stated, otherwise the term is to be considered as
indicating a perfect cusp point.

'

8

NOUTII AMKIUCAN

For |)iir|inHi>8 of tni-asiiroiiUMit, the head is .supposed to In- limited \ty two sets
of t!ui;,'ciit liiii's diiiwn to the iiycs, one set piirallcl to tiie axis of llm iiisi ct,
tlie otliiT pi'r|ieiidi(!ul,'ir to the Haine.

The lines of juncture of the t^yes with tlie iiiterofiilar siirfneo, called ocitlur
Unix, aro ;,'i'ner;illy ncai'ly sfriiijjlit, and liavc vaiioiis di'^^rccs of (jonvcr^'enue
in the diU'erent species. This is indicated liy tin' niniilxT of h(^ad-l('n(,'lhs,
tlie iioiii of junction of tln'sc lines if produced, would he distant from the
anterior niar};in of tlic lal)runi.

The nunihi'rs placed after the various localities indicate the nnnilier of
specimens from each, respectively.

Tilt' genera and subgcuem within our launal limits may bu tabu-
lated as follows : —

Parnglossae not constricted at base; ;j;enae of liead lar;,'e DitlllOllS.

I'arafjlossae stronply constricted at base; genae generally absent, sometimes
visible from above, thouj;li very small.
Fourth tarsal joint simple or but slightly enlarged, not having well-defined
elongated lobes.

Last joint of antennae longer than the i)enultiniate 8teilll8.

Last joint of antennae short, in the i\iales much shorter than the i)enul-

timate Suli-gen. Mutiiius.

Fcnirth tarsal joint distinctly bilobed AreilS*

DIAIVOVS Saniouello.

In tliis gcnijs tiiere are two distiiu!t type?;, viz.: rarnhsrerts Oyll,
and nitidiilus Lee, to each of wliieli there may be considered as
belonging two species, closely allied, it is true, but still distinct as
far as can be judged from the material at hand. In appearance the
species are robust, of a dark steel-blue color, having on each elytron
a large reddish-flavate spot. The eyes are much smaller than in
8tenus, and leave a large portion of the head exposed behind them ;
tlie distance between the eyes is much greater than in any of tiie otiier
genera of tlie group in our fauna. The antennae are very long tind
slender, and the abdomen very strongly margined at the sides. Our
species, three in number, may be tabulated as follows : —

Fourth and fifth joints of antennae (^qual in length or extremely nearly so.
Punctuation very sparse ; elytra scarcely longer than wide.

1. nitiflulus.
Punctuation very dense and fine ; elytra distinctly longer than wide.

2. clialylieus.
Fourth joint of antennae distinctly, longer thin the fifth; punotuation of
elytra sparse, strong ; elytra distinctly longer than wide.

3. zepliyrus.

I !

COI-EOI'TERA.

(t

1. !>• Iiitiilllllis I.<'(^ — I'nlit' .cciici' fine, siil)-ri'i'Uiiil)itiit, hjiaisi', vi-ry
incoi\H\tU\un\x, Head rntlit'r Inrr .< ; intfroculnr Hurfncu rnint'il Hli^rlitly nbovf
tlic cyi's, with two vtTv il('i'|p'y imiircsscil, lirondly riiiiiulcrl, Idiiuitiiclinal
iiiiliicssioiis (liviiliiig it I'liuiiily; iiiti'iiiii'diali' siiit'aco .stroiij;ly fiinl fvciily
(•(invfX ; luinctiirf'H lint', evenly diMtiildited, distniit at nil jjoiiitH liy xliglitly
iiKire tli.'iii their nwn v, idthn, iiiterKpaces tint ; eyes rather small, ])n>iiiiiieiit ;
genai- long, eoiitiiiu' lis in curvature witii tlie eye; anteiiiiai' tliree-fuiMtlis
longer than f'.;>' wMlli of head, lilaek, rather slender, club ilnrk fuscous;
third joint t "-lia.f longer than the fourth, foiirtli and fd'tli efjual in length,
each joint enl.irg •(! toward its tip ; maxillary ]ial|)i long and slender, jiiceous-
Mack tludughoit. Prothorax arciiately, rapidly, and I'veidy ineri'asing in
%vidth to the middle, where it is slightly narrower than long; sides thence
I'eelily convergent posteriorly, nt first sinuntt* ; Imsal angles hroailly rounded ;
anterior and posterior margins eciiial in li-iigth r.nd curvature, feehly aicuate ;
surface transversely and feehly imj)ressed just li(diind the ajiex, strongly
tuberculnto near «nch bnsnl angle; finely, distantly, and evenly punrtnte,
intersiiaces flat, shining, minntely reticulated. Elytra at liase just visilily
narrower than the head; sides feehly divergent posteriorly, alioiit eijual in
length to width at haso, nearly straight; suture ahout one-flftn longer than
the pronotiim ; surface fe(d)ly impressed on the suture toward the hase,
coarsely, s])arsely, and nearly evenly j>uiicture(l ; punctures rounded, gene-
rally distant by more than twice tludr own widths, interspaces shining,
nearly Hat ; flavate spot beginning slightly before the middle of each idytron,
extending as an oval jiosteriorly and outwardly. IJorder of abdominal seg-
ments very strong. Legs long and slender, black, pubescence fulvous; first
joint of the posterior tarsi distinctly longer than the next two tos^Ltlier.

Male.. — Posterior edge of the fourth ventral segment jnst visibly emarginate
in its middle two-fifths, contiguous surface feel)ly flattened; fifth segment
emarginate in it.s middle two- fifths at apex, emargination nearly evenly
rounded, abont ten times as wide aa deep, contiguous surface strongly
flattened throughout; sixth segnnuit deeply and broadly sinuate at a])ex,
sinus evenly rounded, slightly more than twice as wide as deep ; seventh
segment transversely truncate at tip, lateral spines very strongly developed.

FfiiKilc. — Sixth segment somewhat angularly produced at tip.

Length 4.5 nan.

"White Mts., New Hampshire, 8; Garland, Colorado, 10.

The commonest of our .spe(Mes of this genus; when its localities
are t'ciind, it seems to he numerous, hut these are very seldom dis-
covered.

The head in this species is smaller than in zepiiijrus.

2. D. clialybeus Lee. — Form robust. Pubescence very fine, sub-recum-
bent, rather close, dark piceous-brown, inconspicuous. Head large ; inter-
ocular surface having two longitudinal, broadly rounded, and deep impres-
sions ; intermediate suirface strongly and very evenly convex ; punctures
very fine and close, evenly distributed over the entire surface, rather fe(d)ly
impressed, generally separated by their own widths ; eyes narrow ; antennae

10

NORTH AMKUICAN

slightly longer tlian tho hti.'id ami jx-othoriix togctlusr, piceons-Mack, diili
slightly paler; third joint two-thirds longer than the fourth, fourth and fifth
sub-eijual ; joints scareely enlarged at tips; maxillary palpi long and very
slender, pieeous-hrown, tips of lirst and third joints paler. Prothorax arcu-
ate y, rMi)i<lly, and nearly ((venly increasing in width to a i)oint ilistinctly
benind tin- niiddh;, where it is nearly as wide as long ; sides thence very
feehly convergent posteriorly and somewhat feebly sinuate; basal angles
rather prominent ; anterior margin much shorter than the jiosterior, ecjually
and very feebly arcuate; surface very feidily and transversely imprijssed
just behind the a,<ex, broadly and feebly tiiberculate near •■ach basal angle,
very convex in the middle ; pronotum narrowly margined anti'riorly and
posteriorly : punctures very line, distant, and (!Xtrenitdy hndile in tlie middb',
much coarser and closer near the base. Elytra at base about e([ual in width
to the head ; sides rather feebly divergent i)Ohl"riorly, very slightly longer
than the wiilth at base, moderately arcuate ; together broadly and moderately
emarginat(( bcdiind ; suture fully ne-half long(U' than the ])ronotum ; surface
broa<lly imjjressed on the suture in the basal half, also feebly impressed
near the humeri ; punctures moderate in size, very evenly distributed, dis-
tt by slightly less than their own wiiltlis. Abdominal Ixuiler strong,
91. - igly retl(!xed. Legs moderate in length, viu-y slender, l)lack, tarsi long
and slender ; first joint of the posterior slightly longer than the next two
together, scu'ond much longer than the tliird.

Male. — Fourth ventral segment not modilied; fifth feebly emarginat(^ in its
miildle third at apex, emargination evenly rounded, nearly twelve times as
wide as deep, contiguous surface strongly tlattened, or broadly and feebly
iinprc^ssed throughout ; sixth segment strongly sinuate at tip, sinus much
vrider and more broadly rounded thiin the ai)iees, almost semicircular, nearly
two and one-half times as wid(! as dee]) ; seventh segment transversely trun-
< ■ te at tij), lateral spines very long and slender.

Feniiile. — Sixth segment obtusely produced at the immediate apex, sides
feebly sinuate behind ; seventh segment strongly arcuate at tip.

Length 4.7 nnn.

Lake Superior, 7.

The elytrul spot is circular, reiMisli-flavate, begins slightly beliind
the middle of each elytron, and is much nearer the exterior tlian tiie
interior margin.

The above description is taken from Dr. LeConte's type, which is
a female.

This species greatly resembles the European canrnlescens CJyll., but
differs from it in the structure of the interocular surtace of tiie head,
this being relatively much narrower in tiie latter, which also has the
central convexity much wider in relation to the lateral portions. I
have before me only a female of C(erulcsce7is, hi\t in. sev<!ral additional
characters it differs from chahjheiis to a considerable degree.

In tiie former the fifth segment is roundly and very distinctly
emargiiiati; in its middle third at apex, the sixth segment is much

COLEOPTERA.

11

narrower and very {xcutcly produced at apex, with tlie sides not
sinuate, but arcuate behind.

Tiie spots are hirger, more irregular, and surrounded by a V(!ry
distinct lialo of reddish-pur|)I(), wiiich is not observabh; in our species ;
the elytral punctures vary more in size, are coarser and more distant
as a ruh', and I lie elytra are more narrowly and dee[)Iy impressed along
the suture in ccernlescens. Our species is decidedly more robust.

3. D. ZepliyrilS n. sp. — Form nearly as in nilUhtliix, P ibesoence ex-
cessively sparsi', loiif,', more dense and very fine on the aI)ilo)nen ; snrface
shining, minutely reliuulated ; spaees hetween the punctures nearly flat.
Head large; intorocular surface trilobed by the very strongly impressed
hiniritudinal suli'ations ; internif-diate snrfatte strongly an<l nearly evcMily
convex ; punc^tures very fine, distant by nuich more than their own widths
on the convex jwrtions, closely crowded, nearly coalescent in the sulcations;
antennae as long as the head and protliorax together ; third joint hut slightly
more than one-third longer than the fourth, fourth distinctly longer than the
fifth, joints one to eight black, joints of club elongated, much paler ; maxil-
lary i)ali)i long, slender, piceous-black throughout, last joint densely pubes-
ce:it. Prothorax widest slightly behind the middle, wher(i it is much nar-
row(U' than long, suddenly and feebly constricted just btdiind the apex ; sides
strongly sinuate posteriorly ; basal angles nearly right ; posterior margin
slightly long(>r and less arcua(e than the anterior, the latter feebly arcuate ;
surface strongly and transversely impressed just behind the apex, very
strongly tuberoulate near each basal angle, very strongly and rather abruptly
convex in the middle of the disk ; j)unctures very minute and sparse in the
middle, much coarser and closer toward the base ; disk of pronotum termi-
Tiated anteriorly and posteriorly by a narrow, acntts, elevated bonh-r. Elytra
at base as \*'ide as the head ; sides very feebly divergent posteriorly, distinctly
longer than the width at base, feebly arcuate toward the tip ; together nar-
r.nvly and very deeply emarginate behind ; suture one-third longer than the
pronotum ; surface of each elytron impressed along the sutural border toward
the base ; punctures coarse, round, nearly evenly distributed, distant by
much less than twice their own widths. Abdominal border very strong.
Legs long and slender ; tibiae toward tips, and tarsi clothed densely with
fulvous pubescence. First joint of the posterior tarsi equal in length to
the next two together.

Mule, — Posterior edge of fourtl) vi".itral segment just visibly emarginate in
its middhi fourth, contiguous surface feebly llattened ; fifth segmijut nearly
triangularly emarginate in its middle third at apt^x, eraargination seven times
as wide as deep, contiguous surface strongly flattened throughout ; sixth
segment deeply and broadly emarginate at tip, exterior angles of emargina-
tion pronounced, sides nearly straight, bottom broadly rounded, about twice
as wide as deep ; seventh segment transversely truncate at tip, lateral spines
strong.

Female. — Posterior edge of fifth ventral segment very feebly and narrowly
emarginate in the middle ; sixth segment acutely produced at tip.

Length 4.8 mm. »" '■;..•

t •

12

NORTH AMEUICAN

Vancouver Island, British Columbia, 7.

The most salient feulures in the differential characters of the two
s|)eci(^s, iiitldulns and zephi/riis, are the structure of the antennae,
punctuation of tlie iiead, iironotiim, and elytra, structure of tlie hind
tarsi, relative lengths of the proiiotum and elytra, the degree of
emargination of the latter behind, and slight differences in the sexual
characters of the male and female. The antennal club is much more
slender and paler in color in the latter sitecies.

I'he species are evidently closely allied, and whether the insular
conditions under which zephyrus has existed, have caused differences
as announced above, in individuals originally of llw; same species, is
an interesting pr()l)lem, which time alone can aid us in solving.

Tiie spots in zephyrus begin slightly behind tlie middle, are nearly
circular in outline, and are distinctly neansr the ext(;rnal than tlie
internal edge of the elytron.

STEMUS LatroiUe.

The species of this genus are extremely numerous, and often very
closely allied. Our representatives are all included in the three fol-
lowing divisions : —

Abdomen strongly and distinctly margined.

Each (ilytron having a spot of orange tint near the middle of its disk. ...A.
Elytra immaculate B.

Abdominal border rciluced to the mere line of juncture of the dorsal and
ventral surfaces of the segments, only distinct on tlie first segment, and,

v>

in some cases, at the bases of the remainder C. v*

' Division A«

In this division the species are few in number, and among the
largest of the genus. They are recognizable at once by the inore or
less reddish-orange colored spot, of form varying according to the
species, situated near the middle of each elytron. IMie legs are, as
a rule, long and very slender, and they are nearly all rapid in tiieir
movements.

The species occurring in North America, north of the Mexican
boundary, are seven in number, and may be classified as follows : —

Femora black. * ' "'

Spots extremcily small, beginning distinctly behind the middle of the

elytron; form very slender 1. punctiger*

Spots much larger, beginning at the middle of the elytron ; form more

robust; spots somotimea angulated 2. biliuiictatlis.

COLKOI'TEKA.

i;;

FeiiKir.'i iKit lilack, vriryin;,' in cdldr frdia dark ))ii'c()UH-brown to juilc; trslii-

CI'OIIS.

Hcail wiili'i- than tlio i-lytra 'i. colon.

llcail iMjiial ill widtii to thu elytra.

t<|)(its stnnif;ly liiloticil 4. M'llif'er.

Spots circiilai' or ovoiclal.

Ninth and tciilli joints of niiti'iinac of ciinal liMi^'th.-.Ti. sriliicoloil.
'I'cnth Joint of antiMiiiai' iiincli Ioii^'it tlian tin- niiitli.

Spots sitnatcd very near tlic cxtciiial edges of tin- elytra.

li. gt'llllllClls.
Spots situated very near the nii(hUe of the elytra.

7. bileiifiKiitiis.

1. S. imiictiger n. sp. (Fauvcil MS.). — Form moderately slender.
Pnl)es(;eiic(' rather sparse, very short, semi-erect, setifonn, and eiiiereoiis.
Head rolmst, notahiy less than twiee as \vi<le as loiij; ; interocniar snrfaee
two and one-half times as wide as tlu^ ey(f, moderately excavated, liindy and
rather closely punctate ; lon{,'itudinal elevation hroad and distinct, bordered
liytwo shariily marked siileations ; ocular lines meetiiifj; at ahont two li'iii,'ths
in advance; antennae slender, minh loii},'er than width of head, hasal joint
Mack, remainder <lark ])iceous, clnh moderate ; third joint twiee as lonj,' as
the fourth and sliijlitly i<)ii^,'er than the foui h and lifth to;;etlier, sixtii an<l
seventh e(|ual ill li'ii^'tli, eighth joint thicker than the sixth. Joints of cliili
nnifornily increasing in length, last two e(jnal in thickness, last joint acumi-
nate at ti)) ; first Joint of maxillary j)al]ii testaceous, second and third piceoiis-
hlack. Prothorax somewhat elongate, widest at a distance heliind the ante-
rior margin e(|iial to one-sixth the length, sides thence parallel and very
slightly ar(Miate for a distance ecinnl to one-half the length, and rather
rajiidly convergent and sinuate for tin; remaining distance posteriorly; width
ei]nal to three-fourths that of head, ah(uit oiie-lifth narrower than long;
anterior margin slightly longer and more arcuate than the' jiosterior ; surface
broailly and feebly impressed on the Hanks at the middle, liiiely, extremely
closely and somi^what regularly ]iuncliired: canalieulation narrow and very
shallow, coniniencing slightly before the middle and extending posti'riorly
one-third tlie total length. Elytra at base as wide as the head, sides just
]ierce|itibly divergent posteri<irly, mni'h longer than wid(! ; together broadly
and very strongly emarginate ])osteriorly with the lateral eniarginatioiis very
feeble ; suture nearly one-fourth as long again as the pronotiiiii ; surfac«
convex, rather finely, evenly, and extremely clos(dy punctate, interspaces
acute ; on each elytron there is a very small, oblong, orangi^yellow spot Just
bebind_ the middle, and notably nearer the e.xterior than the interior edge.
Abdominal segments ib-creasing gradually and uniformly in width, first
nearly as wide as the contiguous elytra, border prouunent; surface convex,
closidy, feebly, and coarscdy ))unctulat(! ; transverse c.'iri)>a<' vc* ■.'i!S])'d.
Legs long and very slender, black throughout ; lirst loiiit of posterior tarsi
twicft as long as tlio second, not eciual to the next ;■..;>; j together, joints very
slender and cylindrical. Under surface of abdomen polished and extremely
linely punctu'ite.

liO

!i

14

NORTH AMERICAN"

Male. — Posterior edge of fiftli ventral segment feelily emarginate in its
iniiiiUc tliird, emargination evenly rounded, very feeble, short, f.nd not
aliniptly terniinatud, surface of segment eylindrieally impressed for a width
equal til that of the emargination, impression gradually hecoming extinct
anterinrly; sixth segment very broadly and triangularly incised, notch four
times as wide as deep, angle very slightly rounded, surface of segment very
fecMy impressed ; seventh segment very broadly emjirginate at apex.

Ffiitiili . — Unknown.

Length 3.S mm.

Garland, Colorado, 2.

The specimen wliicli I liave associated with the type as above
described, differs from it in several important points, viz.: —

The prothorax gradually increases in width posteriorly and is
widest behind the middle, the club of the antennae is more compact,
the tarsi are paler and slightly more robust, the emargination of the
sixth segment is apparently more feeble and rounding, tiie upper
surface has a more metallic reflection, and the general Ibrm is more
robust.

I believe these diflerences indicate at least a well-marked variety,
but there is not sufficient material at hand to decide upon their specific
importance.

The surface of the pronotum and elytra in the above type is of an
intense black, without lustre and without any indication of the deep
steel-blue tint observable in hipiinctatus.

2. S. bipuiictatllS Ericlis. — Form moderately robust. Pubescence ex-
ceedingly tine, sparse, recumbent, and cinereous. Head very robust, much
less than twice as wide as long ; interocular surface deeply excavated, twice
as wide as the eye, very finely punctured, Interspaces Hat and not equal in'
width to punctures ; longitudinal carina very feebly developed, narrow,
crest impunctate; antennal tuberculations very well developed ; ocular lines
meeting at one length in advance ; antennae much longer than width of
head, very slender, black throughout, club narrow ; third joint equal in
length to twice the fourth, and somewhat longer than the next two together,
sixth and seventh joints equal in lengtli, eighth short, broader than sixth,
joints of club of nearly equal width, ninth and tenth sub-equal in length,
eleventh joint much longer and acuminate at tip ; first joint of maxillary
jjaljii and base of the second testaceous, remaind(!r piceous-black and densely
pubescent. Prothorax increasing arcuately in width for a distance from the
anterior margin equal to two-thirds the length, where it is about three-
fourths as wide as the head and slightly narrower than loug ; sides thence
rather rapidly convergent posteriorly and very strongly sinuate, anterior
margin longer than the posterior, equally and feebly arcuate ; surface almost
evenly convex, finely, very deeply, rather (jvenly and exceedingly closely
punctate, punctures slightly elongated laterally, interspaces very acute ;
canaliculatiou narrowly fusiform, deep, commencing very slightly before the

COLEOI'TERA.

15

midille, and extending posteriorly a distance equal to one-third the entire
leiigtli. Elytra at base very slightly wider than the head, sides sli;^'litly
divergent posteriorly and (evenly arcuate, very slightly longer than width at
base; togetluu' broadly and moderately eniarginate jHisteriorly, outer apical
(jniarginations distinct ; suture but slightly longer tlian tlie pronotum ; sur-
face evenly convex, rather coarsely, evenly, and exceedingly closely punc-
tured, punctures elongated longitudinally n(!ar the suture, interspaces very
acute; just behind the centre of each elytron there is a nearly circular
reddisli-orange spot. Abdominal segments decreasing uniformly' and very
gradually in width, first somewhat narrower than the contiguous elytra,
bordi^r moderate; surface convex, finely, feebly, and closely jiunctulate ;
transverse carinae not cusped. Legs very long and slender, throughout
entirely Mnck ; first joint of posterior tarsi more than twice as long as the
seeon<l, as long as the next three tog(^ther. Under surface of the abdomen
much more finely pnnctulate than the ujiper.

Male. — Posterior edge of fifth ventral segment emavginato in its middle
third, eniargination evenly rounding, eight times as v, ide as deep, s(>niewhat
indellnitely terminated ; surface at tirst somewhat strongly and conically,
then very feebly and cylindrically imjiressed anteriorly ; sixtli segment
broadly and deeply incited at apex, notch triangular, three times as wide
as deep, bottom rounded ; surface very fecddy and cylindrically impressed;
seventh segment deeply eniarginate at tip and deej)ly imjiressed (busally,

Femiile. — Sixth ventral segment generally evenly rounded behind, and
almost imperceptibly produced at the apex.

Length 4.4-r).0 mm.

IVnnsylvaniii, 9 ; Ohio, 2 ; British Columbia, 4 ; "Washington
Territory, 7.

This species appears to vary considerably ; tiie spots are sometimes
small, roinuled, and of a distinctly rut'ous-orange tint ; in other speci-
mens, generally from tiie Pacific coast, they are larger, of a more pure
liavate color, and occasionally nearly quadrate.

Tliere is one specimen before me, which after long deliberation I
have concluded to unite with this species ; it has the tarsi distinctly
shorter and more robust, and the anterior margin of the prothorax
slightly more arcuate, the entire form rather more slender, the sexual
characters precisely the same ; it is from British Columbia, and I
prefer at present to consider it as a slightly aberrant specimen.

S. comma Lee. does not differ from this species to any perceptible
extent.

3. S. colon Say. — Form slender. Pubescence of head, pronotum, and
elytra exceedingly sparse and fine ; that of the dorsal surface of abdomen,
short, moderately close, yellowish, and setiform. Head slightly more than
twice as wide as long ; interocular surface deeply excavated, threes times as
wide as tlu^ eye; longitudinal elevation not well developed; punctuation
close and deep ; ocular lines meeting at about five lengths in advance ;

Ifi

NORTH AMERICAN

antennae sliMnler, dnrk brownish-testacoous, slightly longer tliaii tlie uiiltli
of head, club not well developeil ; tliinl joint one half as long again as tbe
four "i, t'ourtli and liftb cijnal, eigbtli very small, nc^aily globular, Joints of
flnl) slightly elongated, tenth about as long as the eleventh ; maxillary
paljii vi-ry pale yellowish-testaeeous. Prothorax e(iual in length to twica
th"' head, wiilest at the middle, where it is (nie-tliird narrower than the head ;
surface densely and deeply punctate ; sides paiallel and slightly arcuate
through the middle half, thence rather rapidly convergent and sinua*.' ;
canaliculation very narrow, slioi't, and deep, comTneneing very slightly be-
hind the middle. Elytra at basi? much narrower than the heail, and but
slightly broader than the base of the prothorax ; tog<'ther (h-eply euiarginate
anteriorly, and each hisinnate at the apex ; suture e(|nal in length to the
jironotum , sides considerably divergent jxisteriorly ; humeral angles rather
well developed; surface densely and closely pnnc.'tate ; a bilobed, r(Miiforni,
rtavate spot begins slightly before the middle of eac^h, and extends posteriorly
for a distance equal to one-third the length, connnencing at a distance from
the suture visibly less than one-half the width. Abdominal segments de-
creasing but very slightly in width, rather sparsely punctate; transverse
cariuae as in rciiij'cr, with the lateral cusps rather less din-eloped than iu
that sjiecies. Legs long and slender, femora very p;ile ytdlowish-testaceouSj
sha<ied with fuscous at the outer third; tibiae very slender ; tarsi slender,
pale testacecuis, first joint of posterior eijual in length to th(> next three
together. Color of under surface piceous-black, finely and sparsely punctu-
late.

Male. — Fifth ventral segment abruptly and deeply emarginate in its middle
two-fifths, ciuargination evenly rounded, four times as wide as deep, the
adjoining surface being impressed for a short distance, terminal teeth ni(id(;-
rately developed ; sixth segment incised as in reiil/er, though rather more
broadly ; seventh broailly and feebly emarginate at apex.

Fi'iiKili'. — Sixth segment broadly and evenly rounded beliind.

Length 3.()-3.t) mm.

Wnsliingtoii, D. C, .5; Penington (jiip, Va., 2; Michigan, 1;
Soiithurn States, .5.

Tliis species is very closely jiUied to renifer Lee. ; it is, iiowever,
nineli smaller and more slender, and differs notably in the width of
the head and punctuation of the dorsal surface of the abdomen. Tlie
sexual characters are nearly the same in both. In facies the two
species are so distinct that they can be readily sei)arated by the
unaided eye.

4. S. renifer Lee. — Form rather slender. Pubescence of entire body
very sparse, scarcely visible, cinereous on the head, pronotum, and elytra,
more dense but still short and setiform on the abdomen, where it is slightly
fulvous. Head twice as wide as long ; interocular surface moderately ex-
cavated, densely and profoundly punctured ; longitudinal carina moderatidy
prominent ; ocular lines meeting at two lengths in advance ; antennae slen-
der, dark brownish-testaceous, equal in length to the head and pronotum

'*-#1

COLEOPTEIIA.

17

togctliiT, cliit) well (levt'loju'd ; third joint a, littli' more tliiUi oiU'-lialf a.s long
again as tlio fourth, lourtli and lll'th nearly equal, eighth notalily shorter
than tlic seventh ; joints of cliil) nearly e<inal, nioih-rately elongati-d. Pro-
thorax equal in lejigth to twiee the heail, widest at v.iid-section where it is
slightly narrower than the liead ; sides from this point moderately convergent
jiosteriorly aiul slightly sinuat(^; surface denstdy |)unetate ; eommeneing at
the niidille and extending f(U' one-fourth the length there is a narrow, deej),
canalicular excavation, which grndually disappears posteriorly. Elytra at
l)ase as wide as the head, together deeply eniarginate anteriorly, an<l each
hisinuate posteriorly ; sides sliglitly divergent jiosteriorly ; luinieral and
apical angles rounded ; length of suture perceiitihly greater than tliat of
pronotum, aVid equal to the posterior width of elytra '.igethtM- ; surface
densely punctate, each elytron slightly swolhMi ii\ the middle at the haae,
these elevations gradually disajipeai'Ing posterioilv ; a large reuifortn, orange-
yellow spot occupies the middle posterior fourth of each elytron, connnencing
at a distance from the suture nearly e(iual to one-half its width. Abdominal
segments decreasing hut very slightly in width posteriorly; horder very
prominent ; dorsal carinae very slightly sinuate posteriorly, acutely tri-
cuspid. Legs long and slender; femora very pale testaceous, with a hroad
hand of pale fuscous near thi^ tijis : tihiae very slender and slightly darker
than the femora ; tarsi vt'vy slender, jidsterioi' equal in length to three-fourths
the tihiae, first and second joints with a touch of fuscous at the tips, fifth
joint almost entirely pale fuscous ; first joint equal in length to the next
three together. First joint of maxillary palpi dark iuscous, second and
third j)ale yellowish-testaceous. Kntire under surface of hody piceous-hlack.

M(i!( . — Posterior edge of fifth ventral segment inoderately eniarginate in
its middle third, with the surface bordering on the emargination slightly
impressed; sixth segment triangularly incised in its middle half, notch three
times as hroad as deep, with its anterior angle slightly rounded ; seventh
segment broadly eniarginate at apex.

Fi'iiKilc. — Sixtli segment broadly and evenly rounded behind.

Length 3.9-5.0 mm.

Columbus, Texas, ;> ; Arizona, 21.

A fine species ; the orange spot is often very brilliant.

fi. S. semicolon Lee. — Form rather slender. Pubescence of entire body
very short and sparse, flavo-cinereous in color. Head moderate, scarcely
twice as wide as long ; interocular surface well depressed, three times as
wide as the eye, deeply and closely ]iuuotured ; longitudinal elevation well
marked; ocular lilies meeting at about two lengths in advance; antennae
slender, but little longer than width of head, uniformly deep fuscous, club
distinct ; third joint one-half as long again as fourth, eighth scarcely more
than one-half as long as the seventh, eleventh longer than the tenth, joints of
club slightly elongated ; maxillary paipi testaceous, second joint rather paler
at base. Prothorax widest at the middle, where it is four-fifths as wide a.s
the head ; length nearly ecjual to twice that of head, one-fifth longer than
broad; anterior and posterior margins slightly arcuate; sides evenly and
divergently arcuate before, moderately convergent and slightly sinuate be-

Stenini.

2

LIBRARY

eNTOMOLOQICAL BRAN0fr4

DEPARTMENT Of

AGRICULTURE

OTTAWA.

18

NORTH AMKRIOAX

liiiid niirl-scction ; MM'fiu.'i* (Iccply and cdost-ly iiiiiictiircd, iiifcrsiinccH iinrrow
and sliininj; ; comnii^ncing at tlic niiddl<' ami ('yt('n<lin},' iiostcrioi'ly a distancf
(■i]nal to aliimt onc-fonrtli flic It-nf^lli, tluTc is a narniw and dci'ii canalicnla-
fiiin. Elytra at base abont ('([nal in widtl; ti) tin; ln-ad, tojjctniT deeply
(Mnarginatt! anteriorly, cacli Msinnate jiosteriorly ; sides divergent ponte-
riorly, evenly areuate ; linnieral an;,!es soniewliat ronnded ; snrl'aee coarsely
and closely jmnctate, and loiigitudinally channeled ; jn U behind tl.'e midille
of each, there is a very small orange spot. Abdominal segments decreasing
very gradnally in width ]io.sti'ii(n'ly ; sides of each markedly sinnate ; surface
rather linely and closely imnctate; transverse ca;'inae tricusjiid posteriorly,
with the intervals sinuate ; middle cusps very narrow and cariniform. Legs
moderately long and slencler ; femora and tibiae fiisco-testaueous : tarsi deep
fuscous, lirst joint of jiosterior nearly e(|ual in length to the next three
together. Under surface of body piceous-black, generally finely punctulate.

Malf. — Third ventral segment fcbly ini ircssed throughout the middle
third, margin entire; fourth segment very !> ebly sinuate in its miildle two-
fifths, surface distinctly impressed anteriorly for the same width, borders of
impression densely ciliate : jHisterior edge of the fifth segment broadly emar-
ginate in its middle two fifths, emargination evenly rounded, (<ver four times
as wide as deej), surface impressed throughout in the form of a broad, rather
deep channel, with the borders densely ciliated ; sixth segment deeply and
acutely enuirginate in its middle third at apex, di^jth of notch equal to its
width, angle rounded, surface of segiu(;nt not iuipressed ; seventh segment
broadly eniarginate at apex.

Female. — Sixth segment convex ; length equal to bieadtb at base, sides
evenly rounding excejjt at the apex, which is feebly sinuate.

Length o. 8-4.4 mm.

White Fish Point, Michifran, r» ; wcsti'in shore of Luke Sn|)erior, 2 ;
Mur(|uette, ^lichij^an, 4 ; District of Cohimhia, 1 ; .Southern Slates,
1 ; Escunaba, Michigan, 1.

Kemarkahle among the spotted species, for tlie well-marked sexual
characters of both nude and teniale. The spots are scarcely visible
in some specimens.

0. S. geniineilS n. sj). — Form rather slender. Pubescence of head,
pronotuni, and elytra scarcely visibk', more dense on the head ; that of
dorsal surface of the abdomen a little longer, slightly fulvous, setiform, very
sparse. Head twice as wide as long; interocular surface moderately exca-
vated, about twice as wide as the eye, densely punctured : longitudinal ridge
rather well developed ; ocular lines meeting at one length in advance ;
antennae about equal in length to width of head, rather slender, deep
brownish-testaceous, club not prominent ; third Joint one-half as long again
as the fourth ; fourth and fifth ('(jnal ; joints of clul) <>qual and somewhat
elongated ; maxillary palpi slender, flavate throughout. Prothorax twice as
long as the head, widest slightly before the miildle, wlier(! it is slightly
l)roader than the interocular surface ; sides from widest section feebly con-
vergent and very slightly sinuate posteriorly; surface deeply and closely

COLEOI'TKUA.

19

narrow

nlifiiliv-
dm-ply
t jxwtt'-
(Miarst'ly
■ inidfllu
ereaHiiig

; slirflKt'

iterioily,
n. LegB
arsi (Ift'p
•xt three
nctulate.
i. middle

ddlf tAVO-

liordcrH nf
dly I'lnar-
lour tiiiicH
ad, rallier
eeply and
[nal to itH
li segmi^nt

l)ase, sidfs

levior, 2 ;
States,

'i\ sexual
V visible

of iK-ad,
tliat of
form, very
atfly exca-
diiial ridge
advance ;
iidcr, deep
long again
somewhat
ax twiee as
is slightly
feel>ly con-
aiul closely

pniK'tured and channeli'd ; upon each side of the proiiolmn near the haso
there is a shallow impression ; caiialiculation nearly olisolete, I'oninieni'ing
at the middle and not attaining tht^ hase ; anterior and jxisterior margins
arcuate. Elytra at hnse narrower than the liead ; togt^ther hroadly emargi-
nate at thci hase and apex : sides fiMdily arcuate and slightly divergent posttv
riorly ; suture e(|ual in length to the pronotum ; surface very deeply and
<'losely luinetun'd aud channeled ; near the ))ase of each tdytron th(!re is u
slight elevation ; orange-yellow spots small and nearly (urcular, very close
to tlie outer margins, and just hehiiid tli(? mid<ile. Abdominal segtnents
<lecreasiug very gradually in width posteriorly; hoi'der di-^tinct on the first
four, very narrow (Ui the fifth and sixth ; punctures rather lino and distant,
heconiing very tine posteriorly ; transverse cariiiae well developed, tricuspid,
intervals distinctly sinuate. Legs rather Ion;,, very slender, pale hrownish-
testaceous ; femora darker in the outer half; tarsi slender; first joint of
posterior rather longer than the next three together. Coxae darker than the
femora. Under suiface piceous-lilack, feehly punctate, shining.

Miilf. — Fourth ventral segment very feehly emarginate in its middle two-
fil'ths, surface hordering eniiirgination <leeply impressed, border of imjjressed
area dens(dy clothe<l with long setae ; fifth segment emarginate in its middle
third, emargination evenly roiinded, four times as wide as deep, contiguous
surface hroadly channeled, border of channel-like imjiression ciliated; sixth
segment roundly emarginate in its middle third at apex, width of emargina-
tion hut slightly (jxceediiig its depth ; seventh segment emarginate at apex.

Female. — Unknown.

Length 4.0 mm. '

Georgia, 1.

A veiy distinct species in every respect.

7. S. bilentigatlis n. sp. — Form moderately robust. I'uhescencH of
entire body very short, fine, aud setiform, extrem(dy sjiarse. Head well
developeil, twice as wide as long ; interocular surface well excavated, three
titnes as wide as the eye, deeply and closely punctured ; longitudinal eleva-
tion moderately prominent ; anteiuuu^ much longer than the width of head,
slender, very deep I'usco-iiiceous, darker toward tiji, club well develo])ed ;
third joint slightly more than one-third as long again as the fourth, fourth
and fifth almost equal, sixth and seventh nearly ecjiial, shorter, tenth and
eleventh equal in length, each much longer than the ninth ; ocular lines
meeting at about one and one-half lengths in advance; maxillary palpi j>ale
tlavo-testaceous throughout. Prothorax widest at the middle, where it is
four-fifths as wide as the head and slightly narrower than long ; sides from
mid-section gradually convergent and siiiuatt!; surface ih.eply, closely, and
rather evenly punctured ; a narrow and deep caiialiculation begins slightly
behind the middle, and extends posteriorly a di^anco equal to about one-
fifth the length ; posterior margin nearly straight. Elytra at base as wide
as the head, sides rather strongly divergent, arcuate ; suture about one- fifth
as long again as the pronotum ; humeral angles rather acute ; at the middle
of the hase of each there is a marked elevation which disappears at a very
short distance posteriorly; just behind the middle and situated slightly

20

NORTH AMKUrCAN

lu'iiriT tin; fxtiTior than tin; inturior i-dgc, tliori! is a small longitudiiially
e'migntcd spot ot Hiivo-testacfous tint; surface di-nply, clonely, and uvt-nly
l>mi('tatt'. Abdominal scfjuicnts docri'a.siii},' very j;i'adiially in wiiltli j)<)><ti'-
riiM'ly, lirst niiuh nariowiT than tln" continiioiis elytra ; border very stiiMi}; ;
MUrfaee closely punctate ;' transverse carinae unicuspid, cusj) elongated.
LfCgs pale flavo-testaceoiis ; t'eniora clouded with fuscous toward ti]i, tarsi
hleiider, each joint shaded with fuscous at til); ''"''*' j"'"t of j)v)sterior eijual
in length to the next three together. Under surface piceous-black, abdomen
di-.tanfly and thu'ly imnctulate, shining.

Miilf. — l-'ifth ventral segment eniaiginato in tlie nnddli> third at apex,
emarginatioii evenly roanded, live times as wide as deep, terminated by
rather well-developed teeth ; surface of segment impressed for a short dis-
tance anteriorly ; sixth segment broadly and triangularly incised in its
middle half at apex, notch four times as broad as dei'p, angle slightly
rounded ; seventh broadly emarginate at apex, longitudinally impressed
dorsally.

Fi'iiKiln. — T'nknown.

Length 15.13 mm.

Virginia, 1.

Tliis species differs from semicolon, Avliich it resembles very greatly
ill liU'ies, in the structure of" the jiiiteiiiial club ; in the present species
the tenth joint is long anil eyiindricul, ami is equal in length to the
eleventh, while in seuilrohm the tentii joint is as broad as long, and
much shorter than the eleventh. It also differs very greatly in the
maxillary Jtalpi, those of semicolon being very dark, especially toward
the tips, while in hilentl(j<itns they are very pale (lavate throughout.
Tiu'se two ciiaracters are very striking and very singular when we
consider the very close reseml)lanee in tlie genenii form of the body.
The legs in semicolon are also very much darker ban in the unicpie
type of bileitti(j<itns.

Division B.

In this division, by far the most extensive of the genus, the species
enjoy a comparatively great range of variation, not only in size but
in sculpture and structure of the various portions of the body. Tlie
sculpture varies to such an extent from one form to another, is appa-
rently so constant and always so well marked and easily observed in
the individual species, that it has been assumed as the basis of primary
subdivision of the large number of forms here considered. The sub-
divisions are indicated by the following scheme : —

Punctures joined into more or less tortuous channels in at least one portion
of tlui elytra! surface, which channels exhibit an unmistakable spiral or
vortex arrangement, the spiral or vortex being complete or approximately
closed ; single punctures more or less isolated, may also exist at other parts
of t'.ie elytra a.

COLKOrTEUA.

SI

l'«iictiiri'« jdint'd or i-onlf«coiit ; pioni<>titn('« rari'ly, in two?* or tlirt-i's. in otii'T
oiist'H in loii<;fi' cliiiniicls, in otlici'H still in very lon^; clinnnds, witli
suarei'ly it trace of indiviiluni ])un('tur«<s iiiion any jxirtioii of llic Hurfacc.
The channels when they exist may he extremely tnrtnous, hnt unless
they exliihit a eoniiileteil spiral vortex or whirl iit one jioiiit at least,
they will helong to this subdivision. The channels or imnctures niny
\w comparatively distant or very closely compacted, and llic interspai-es
correspond injjiy wide or acute, convex or flat, highly ixilishi-d or minutely
granulose and feelily shining.

Prothorax canal icu la ted 3,

I'rothorax not canal icu lated y. f- ^ ^

I'uncturc-s all isolated and distinct i.

Subdivision «.

Tlie specit'S tmdcr this title attuin the highest form of il(jvt'h)|)iiieiit
to he ohserved in the genus, uiul are generally large and rohust, uetivc
and comparatively powerful.

The forms apparently demanding specific recognition may he
classified as follows : —

Transverse carinae of abdomen tricuspid.
Le^is hlack heneath.

Pronotum having, in addition to the canaliculation, a i>unctiforiu im-
pression near each antcM'ior and posterior angle.

Prothorax widest sliglitly heliind the middle S. SCIllptilis.

Prothorax widest far in advance of the luiddle !>. lilCCUlillillli^«

Prothorax devoid of the punctiforni inxpressions.
Elytral suture much longer than the pronotum.

Interocular surface rather deeply excavated ; longitmlinal elevation
distinct; canaliculation of pronotum distinct.

Head as wide as the elvtra at base 10. jiino*

Head much narrower than the elytra 11. verticOHlls.

Interocular surface feebly excavated ; longitudinal elevation very
feeble; canaliculation of the pronotum reduced to a very sliirht

«'rosio I 12. tristis.

Elytral suture rather "horter than tlu^ pronotum ; body de](ressed ;

prothorax very robust 1:5. Alistini.

Legs not hlack beneath.

Form very slender ; sculi>ture extremely coarse ; interocular surface very
narrow, much less than twice as wide as the eye ; length 4.4 mm.

14. raiiops.
Form more rohust ; interocular surface at least twice as wide as the eye ;
length generally much less than 4 mm.
Elytral suture about as long as the pronotum.

Sides of prothorax scarcely sinuate behind ; siirfaco of pronotum
very distantly and finely punctate, very highly polished. Middle

•''tates 15. ilelawarensis.

22

NORTir AMKUICAX

Siili'H of jirotlKirnx Ntroiijjly siniiattt lifhiiid ; smTaci' of iiroiKitiiin
riitlior (Iniist'ly and t'o(irs«'ly Mculiiturccl. WawliiiiKtoii 'I'l'iiitury.

li). sectutor.

Klvti'.'tl siitiii'i! tniich longi>r than the iironotiini.

I'icitliorax widest in advani't; of tiic middle; licad small,' sii>,'iitly

narrower than the ulytra at base 17. ZllliicilH.

I'rotliorax widest at or behind the miildle; liend lar;,'e, as wiile as

or slii,'btly wilier than the elytra at base 18. feniorutllH.

TransverHe cnrinae of iibdonjon riidimentarily 4-uuspid. Washin^jton Terri-
tory 111. tacoiiise.

8. S. H(;ill|itilis n. sp. — Form robust. I'liht tcence very fine, sparse,
plumbeous, ami almost invisible, except on the abdomen, where it is short,
coarser, close, evenly distribnjed, sub-rei iimbent, and fulvous in color. Head
moderate, more than twic« as \?id« as lonp ; interocnlar surface moderately
depressed, nearly three times as wide as the eye ; lonj^itiidinjil tdevjition as
wide as the lateral portions, abruptly rising;, evenly and vety stroiifjly con-
vex ; pnn<;tnri'S in this region evenly distributed, not .oalescent, round, and
Very close, near the eyes the punct\ircs are confusedly cualesceiit ; (jcular
lines meetinj; at about two lengths in advance; anteniiau long, distinctly
longer than tlii' width of head, very slender, <dub prominent an<l loose,
thi'oughout ]>ale iiiccous-brown ; third joint one-half longer than the fo'ivth,
fourth and fifth equal, sixth very slightly longer and somewhat less robust
than the seventh, i^iglitli twti-thirds as long as the seventh, more than twice
as long as w ide, rather abruptly larger toward tip, joints of club of eijual
length, slightly longer than the eighth ; maxillary palpi long, baHal joint
and basa'. half of the second rather pah* piceo-testaceous, remainder pale
piceous-brow n, third joint vvvy long, strongly lljittened ; nientnm having
four stout yellow setae arranged transversely near the bas,-. Prothorax
widest in the middle, whiM'e it is live sixths as wide as the luad, and just
jierceptibly narrower than long ; sides thiMice strongly uonvergci.t posteriorly
and rather strongly sinuate ; anterior and posterior margins eijual in length,
the former slightly the more arcuate ; surface with two strongly impressed
pita at the base, and two at the vertex, strongly tuberculate near the basal
angles, transversely and strongly impressed just behind the vertex, extremely
closely, deeply, and very confusedly punctured and chanuided, interspaces
very acute ; canaliculatiou very strong, deeply impressed, fusiform, two-thirds
as long as the pronotum, terminating slightly niuirer the apex than the base,
bottom sjjaringly punctate, edges narrowly and acutely swollen. Elytra at
base as broad, or very slightly broader than the head ; sides feebly diver-
gent, slightly longer than the width at base, rather fet.'bly arcuate; togi!ther
bioadly, angularly, and deeply emarginate behind ; suture nearly onedialf
longer than the pronotum ; surface broadly impressed on the suture at the
base, rather finely, extrtnnely closely, and irregularly channided, ch<innels
long, deep, and very tortuous, interspaces acute. Abdominal segments
decreasing uniformly and rapidly in width, first much narrower than the
contiguous elytra ; surface rather convex, extremely finely and irregularly
punctulate ; transverse cariuae tricuspid, cusps broader than long, intervals

OOKKOPTKIIA.

28

(lfi>|) and trinngiilar. Legs mndcrittf in Icii^'tli, rather rolinst, picon-fuMcoiis ;

lli'Mt joint (if posti'iior tiirsi iint'-li.'ilf lon^jcr tlian tlic Mcconcl, as long as tlii«
tittii, stM'oUil joint iiitlicr .slmrtcr tiian tiic ni'Xi two foj^i'tin'r.

,l/,(/,.. — Fifth ventral Hcgnicnt oiaarginatc in its niidille third at apox,
etna !';.'{ nation cvi-nly roimdi'd, and ten tiwii-s as wide as di'f)), (■onti<;nons
siirfaci' dci'|dy inipn-.sniMl, inijiri'ssion in tin- form of an oval, distinctly lonjjer
tlian wide, tlie sides liein^' Very deulivons on all sides exeejtt posteriorly,
where till) eniar},'ination forms its outlet, the sides lieeome acutely rid);i'd
posteriorly, and terminatu at the ends of the emarKination in aeute teeth,
]irojeetin^ Hli^htly In liincl the se^^ment, tl hottom of the oval, erater-liki'
impression is llat, minntely retiii;lated ancl palieseent ; sixth segment sinuate
at apex, sinus nanower than the apiees, hroadly rounded at tin* hottoui,
rather abruptly terminated lieliind, and ahout one-half wider than deep;
Seventh segment roundly, ratln'r deeply and evenly emarginate at tip.

Ffiiitih;, — ITnknown.

Length 4.S-.'j.0 nun.

Liike Tahoi', Ncviulii, 1 ; Ciilitorniii, 1 ; Teiiino, Washin;j;t()ii 'IVr-
ritory, 1.

One ot' tlif finest species of the genns, and surpussetl by none in
the siiiguhirity and distinctness of its sexual eiuiraeters. Tiie pro-
tliorax, also, has more strikiii^j and salient characters than perhaps
any other species; the stron>i Itattening of the third palpnlar joint is
u cliaractei' seldom seen in lliis trihe.

!•. S. laC'COpllilllS n. sp. — Form robust. ruheseence short, eoarse,
evenly distrihuted, semi-erect and pale llavati- on the ahdonien, (cinereous,
and muih less eonspiciuius on the remainder of the upper surfa<'e. Head
moderate, twice as widt^ as long ; intercwular surface very feebly (^l^vex, two
and three-fourths times as wide as the eye ; longitudinal elevation narrower
than the lati^ral jiortious, very strongly and evi'uly convex, ])romimuit, sulfa-
tions prominent; piiui-tures rather large, <^venly distributt^l, deep, rounde<l,
seldom coalescent, interspaces feebly shining; ocular lines meeting at one
and one-half lengths in advancis antennae scarcely longer than tin? width
of liead, rather I'obust, jiieeous-black, club distinct and densely pubescent;
third joint two-lifths longer than the fourth, fourth and lifth joints e(iual,
sixth and seventh equal in length, the latter much thicker and narrow at
the base, eighth slightly longer than broad, very robust, joints of club
slightly incri'asing in length, very robust; the live outer joints are sii<ld<'uly
nuudi more thickly pubescent than the preceding ; nuixillary jialpi moderate
in length, first joint flavate, second dark piceous-brown, third black, first
two joints unusually robust, third unusually thin and shoi't. Prothorax
widest at the middle, where it is very slightly narrower than the head, ami
just perceptibly narrower than long ; sides thence very moderately conver-
gent posteriorly and very feebly sinuate ; anterior and jiosterior margins
eijual in length, the foruu-r arcuate, the latter nearly straight ; surface dis-
tinctly and longitudinally tuberculate near the basal angles, longitudinally
impressed along the Hanks of the pronotuui, transversely impressed behind

24

NORTH

^KUICAN

tlii.> iipt'X, liaviiif; two small, found, shallow i)its very closo to tint api'x and
soiiicwliat nt'ai- the ajiical anj^li's ; i)mictnrcs very dwp, (^xtrcincly dose near
till' liasc and apex ; canaliciiiation long, narrow, distinctly and roundly
inipri'sscd, tciiniMatii j; at very short distances from tlm base and apex.
Elytra at liasc much hroadcr than tho head ; sides fv'ebly divergent jioste-
riorly. rath(;r strongly and evenly arcuatt? ; together broadly, roundly, and
distincMy emarginate hehind ; suture as long as the width at base, one-tliird
longer than the pronotum ; surface deeply, rather (iiieiy, extremely dosidy,
an<l unevenly channeled, very confusedly i)unctate near the base. Abdo-
minal segnuMits del reasing nnifoiinly and extremely gradually in width, first
as wide as the contiguous elytra; surface coarsely, rather 'dosely and (;venly
punctulate, more finely and distantly so posteriorly, interspaces polished ;
transvei'se carinae tricus])id, middle cusps strong, acicular toward tijis,
lateral much broader, somewhat shorter, expanding at tips ; lateral bonleis
very strong. Legs rather long auil slender, piceous-blaek, tarsi rather
robust; lirst joint of jiosterior tarsi three-fourths longer than the secoml, as
long as the next two together, and slightly shorter than the fifth.

Male, — I'nknown.

FiiiKilc. — Sixth ventral segnnmt l>roadly and rather obtusely rounded
behind.

Length 4.0 mm.

Grimsby, Ontario, 1.

10. S. jlllio (l'\ab.). — Form rcdmst. I'ubescence short, sparse, eviuily
distributed, semi-erect, fine, and incons])icuous, cinereous. Head robust,
scarcely twice as wide as long; interocular surface moderately depressed,
nearly twice as wide as th(! eye, ecjually trilobed by the very distinct longi-
tudinal snlcations, intermediate surface evenly and rather strongly convex ;
punctui'es coarse, very close, unequal in size, mostly coalescent, and generally
longitudinally elongated; ocular lines meeting at slightly more than one
lengtli in advance ; antennae much longer than the width of head, slemler,
])iceous-br,)wn, basal joints black, club moderate ; third joint about one-half
longer than 'he fourth, fourth slightly longer than the fifth, sixth and
seventh equal in length, the latter slightly thicker, eighth as thick as the
seventh, twice as long as wid(% ovoidal, very narrow /it base, joints of club
increasing gradually in length and thickness ; nuixillary palpi very long and
slender, first and second joints llavo-testac(;ous, third rather pale piceous-
brown, vovy slender. Prothorax widest at the middle, where it is live-sixths
as wide as the head, and ve'y slightly narrower than long; sides thence
niod(!rately convergent postei lorly and neai'ly straight ; surface feebly swollen
near tlie basal angles, transv(-rsely and feebly impressed just behind the
vertex, rather coarsely, closely, and evenly jmnctaie, punctures coalescent
toward the base and apex ; canaliculation very feeble, two-thirds as long as
the pronotum, terminating at equal distances from tlie base and apex.
Elytra at base just jx^rceptibly narrower tlian the head ; sides moderately
divergent posteriorly, slightly longer than the width at base, nearly straight
anteriorly, arcuate near the apices ; togcsther broadly, roundly, and rather
strongly emarginate behind ; suture one-seventh longer than the pronotum;

COLEOPTEUA.

25

surface vory feebly dopressod on tlit; snturt! at tlie base, (^oarfcly, il('(']ily,
("Xtri'iut'ly (.'loscly imnctiirt'il ami thaiini'Iccl. First foiii' abdiniiiiial si'j;iiieut3
equal in widtii and imuli narrower tliaii tlie ('(intignoiis I'lytra ; surface
coarsely, deeply, and moderately sparsely punetulate ; trausvorso carinae
tricuspid, middle cusps lou<; and aeit;ular, lateral short and iiieouspieiU)US.
Legs bhuk above, tibiae and tarsi ])ieeous IxMieatli, slender, posterior feiuora
conspicuously and very densely clothed with long tlavo-oinereous ])ubesc»3nce
along the ])osti'rior e(lge , first joint of ])osterior tarsi much more than twice
as long as the second, longer than the next tliree together, and three-lourths
longer than the iifth, joints vtM'y shnider.

Mtili'. — First ventral segniiMit having a short, narrow, longitudinal, and
piominent carina, tersniiiating at its posterior edge ; second segment having
a siu'.ilar carina, which does not attain the post(M'ior tMlge ; third segment
emarginate in its middle tw(dfth at apex, einargination evenly rounded and
\(}iy feeble, surface having a carina similar to that of the first segment, which
neaily attains the eniargination ; fourth segment emarginate in its middle
lil'th at apex, emarginalion more acutely rounded at the bottom, about eight
times as wide as deep, conti 'ous surface feebly impressed for two-thirds the
length anteriorly, carina siuiilar to that of tin' lirst segment, though slightly
longer, nearly attaining the emargination ; Iifth segment very deeply ex-
cavated in its middle two-fifths, bottom of excavation not punctate, nearly
Hat, and declivous posteriorly, as long as wide, sides in the foi m of over-
hanging, very acute ridges ; anterioily there is a carina similar ui that of
the first segment, posteriorly the tliin edge of the excavation is dceiily emar-
ginate ill its middle half, emargination one-half deeper than wide, transverse
at bottom. si<les nearly j.arallel ; sixth segment sinuate at apex, sinus very
narrow and deep, acutely rounded at tbn iKittom, much deeper than wide,
apices acutely rounded ; seventh segment dentate laterally beliind, and
bearing on each side a long coarse seta.

FiiikiIp. — Sixth segment strongly narrowed posteriorly, bilobed at apex.

Length 4J> mm.

Ciiiiiliridgi', Mass., S; Micliigan, 12; Texas, 1 ; Canada, 0; Wasli-
iugtoii Territory, 7 ; Vancouver Islaiul, 1.

In tlie female tlie abdominal sejiments are nnicli broader and have
tlie sides feebly converpfent po-^teriorly. There are few s|»e('ies of the
order Coleoptera bavinii; sexual cbaracters sodisiiiu-t and coniiilicated
as those seen in thi:- little species; a clear description of the (ifth
segment of the male would l)e almost impossible. It is, perhaps,
cosmopolitan, being a very conunon species in Europe as well as in
America.

11. S. vei'ticosUS n. sp. — Form robust. Pubescence very line, sparse,
irregular, cinensous, and almost invisible. Head sn\all, twice as wide as
long; interocular surface nearly fiat, more than twici' as wide as tlie eye;
longitudinal elevation slightly narrower than the lateral portions, very
strongly and evenly convex, prominent, sulcations parallel ami distinct,

26

NOHTir AMERICAN

behind the antennae there are pits bonUfring immediately upon the eye;
punetures fine, rounded, very unevenly distributed, interspaiu'S sliining,
feebly convex ; ocular lines nmetiiiy at one length in advance ; antennae
longer than width of head, slender, piceons-black, club strong, clothed with
pale piceo-ciiKjreous pubescence ; third joint one-halt' longer tlian the fourth,
fourth and fifth e<iual, sixtii and seventh e(iual in length, the latter two-
thirds tliicker, eighth tliicker than the seventh, almost exactly glolnilar,
joints of club increasing in ](Migtli, last two much larger than the ninth,
sub-eqnal in tliickness ; maxillary pn,\[n rather long, first joint and base of
secoml piccd-testaccous, second twice as long as the first, i)iceoes-black, third
rather long, piceous-black, rather abruptly enlarged towaid the tip, and
somewhat sigmoid. Prothorax robust, widest sligiitly in advance of the
miildle, where it is nearly as wide as the liead and ilistinctly narrower than
long; sides thence very feidily converg(!nt posteriorly and straight; anterior
and posterior margins very feebly and equally arcuate, sub-e(iual in length ;
ftliical and basal angles not rounded ; surfaces feebly and liroadly tubcrculate
near the basal an;rles, transversely im|)resse(i behind the vertex, rather
finely, somewhat deeply, very closely, and confusedly channeled: canalicu-
lation V(iy narrow and distinct, terniinating within one-lifth the pronotal
length of the base and apex. Elytra at bast? much wider tliaii the head;
sides feebly divergent posteriorly, nearly straight toward the humeri, dis-
tinctly arcuate toward the vertices ; togethtu' very broadly, roundly, and
rather feebly emarginate behind; suture slightly longer than the width at
base, one-third longer than the pronotum; surface very deeply, extremely
closely, rather coarsely, and very irregularly channeled ; there are tvfo
completed vortices at the base, and one near the apex of each elytron.
Abdominal segments decreasing uniformly and extremely gradually in
widtli, first very slightly narrower than the contiguous elyti-a ; surface very
feeblj convex, finely, rather distantly and evenly punctulate, shining ;
border very strong; transverse carinae tricuspid, middle cusps finely acumi-
nate, lateral very short and rudimentary. Legs rather short, slender,
black; fii'st joint of posterior tarsi two-thirds longer than the second, much
shorter than the fifth, second very slightly longer than the third ; all
robust.

Mule. — Fourth and fifth ventral segments emarginate in the middle two-
fifths at apex, emargination of the former rounded and very feeble, that of
the latter evenly rounded, strong, about four timi'S as wide as ileep, con-
tiguous surface of fourth iiiiiiressed feebly for a short distance, that of fifth
strongly impressed nearly throughout, impression having the lateral bonb^rs
in the form of acute ridges, all dep.'essed areas being bordered by a very
dense line of erect, coarse, fiavate S(!tae ; sixth segini^nt sinuate at tip, sinus
narrower and more acutely rounde(l than tiie apices, more than one-half
wi(b>i' than dt^ep ; seventh segment roumlly eniHrginate at tip.

Fciiifilf. — ISixth venti'al segnnuit rather acutely rounded behind, surface
finely reticulated and minutely punctulate.

Length 4.0 mm.

Vancouver Island (Crotch), 1 ; Washington Territory, 0.

COLKOPTKKA.

27

tli(! eye ;
sliiniuj^,
antciiiiiU!
tlieil witli
lie fouitli,
ittcr two-
f,'l()l)iilar,
tlio ninth,
nil base of
ivck, tliinl
J tip, and
ice of the
•owi'i- than
, ; anterior
in liMiiitli ;
ubtiiciilate
I'X, ratlier
; canalicu-
le pi-fHiotal
th<i hcail ;
unu'ii, ilis-
iindly, and
It. wiiltli at
, extremely
re are two
ch elytron,
radnally in
lufaue very
e, shining ;
ucly acnnii-
rt, slender,
•ond, nuu'h
tliird ; all

middle two-
ilile, that of

deep, eon-
tiiat of lifth
eral borders

by a very
at tip. sinus
lan onedialf

lind, surface

In this species the vortex arrangement of the elytral sculpture may
be seen in a higiily developed state. In none other of our sjjecie.s is
it so conspicuous.

12. S, tristis n. sp. — Form moderately robust. Pubescence short, mode-
rately close, evenly distril)Uted, senii-ere(;t, ratlier fine, plumbo-ciiu'reous.
Head moderate, rather robust, twict; as wide as lonj; : interocular surface
]ii\uly flat, t\vic(! as wide iv.- the eye, loni,'itndinal elevation as wide as the
lateral ]iortions, feebly and evenly cunve.v ; punctures snuill, round, rather
close, sub-variolate, evenly distributed, isolated ; ocular lines meeting at one
lenj;th in advaiu^e ; antennae vi'vy dark piceous brown or piceous-black ;
third joint distinctly longer than the second. Prothorax robust, widest at
slightly more than one-third of its length posteriorly, where it is nearly as
wide as the head, and just perceptibly narrower than long; sides rather
strongly convergent posteriorly and nearly straight ; antt^rior margin slightly
longer than the posterior, nearly e<iually arcuate ; surface feebly tulieiculate
near the basal angles, very feebly so near the apical angles, upper surface
of pronotum nearly Jlat ; punctures small, very variable in shape and size,
close, rather eV(MiIy distributed, seldom coalescent, interspaces narrow,
slightly convex and feebly polishiMl ; caualiculation very short, nearly as
broad as long, beginning at the middle, and one-liftl. as long as the pro-
otum, very feebly impressed, bottom punctate. Elytra at bas(! ,'is wide or
just percepti\)ly wilier than the head; sides rather feebly divergent j)0Ste-
riorly, longer than the width at base, very fetdjly and evenly arcuate ;
together broadly and very feebly emarginate behind ; suture one-tliird
longer than the pronotum ; surface very feebly impressed along the suture,
more particularly toward the base, feebly convex, closely, somewhat feebly,
finely, and irregularly punctate, punctures generally variable in shape and
size, seldom actually coalescent near the base, where they are closely crowded,
polygonal in some places, isolated and round in others, more coalescent ])oste-
riiirly; spiral near the apex and outer edge, very indeiinite and feeble.
Abdominal segments decreasing nearly uniformly and extremely gradually
in width, fust just perceptibly narrower than the elytra; surface coarsely,
deeply, evenly, and closely punctulate ; punctures impressed, interspaces
very convex and highly polii^hed ; transverse carinae tricuspid, middle cusps
finely acicular, lateral rather coarsely acuminate, a little shorter and strongly
inclined inward. Legs moderate in length, slender, piceous-black ; first
joint of posterior tarsi two-thirds longer than the second, slightly shorter
than the last, and slightly longer than the next two together.

Mull', — Posterior edge of the lifth ventral segment just perceptibly emargi-
nate in its middle third, emargination evenly rounded and not jueasurable,
contiguous surface bearing slight ei lences of fiattening ; sixth segment
sinuate at apex, sinus narrower than the apices, and more acutely rounded,
slightly more than twice as wide as deep; seventh segment very feebly and
roundly emarginate at tip.

Female, — Ihi known.

Length 3.o mm.

28

NORTH AMERICAN

Gilroy, Californin, 1.

Tlie iintciinac witli exception of the first three joints, and also tlie
niaxiihiry palpi are wanting in the type.

13. S. Alliitiiii II. sp. rF.i\iv('l MS.). — Form moderately sUmicLm-, siili-s
jiaralli'l. rulit'scfiico fiiie, cvi-iily distributi'il, moderately short, I'atlier
f^parse and iiu-oiisj)iciii)iis, cinereous. Head lar^e, not twicer as wide as
long; interooular surfact* very feebly depressed, scarcely twice as wide as
the ey(% lonpjitudinal elevation nineli narrower than thi^ latei'al jjortioiis,
rather acutely and strongly convex, prominent ; i)nnctures fuii', roundeil, very
closely crowded, evenly distributed, not coale.icent ; ocular lines mo(!ting at
one length in advance; eyes v(!ry large, wide, and prominent; antennae
very slightly longer than the width of head, raiher slender, dark piceons,
club j)roiniiient ; third joint one-fourth longer than tht^ fourth, fourth per-
ceptibly longer than tlu^ fiftli, sixth shorter, very slightly longer than the
seventh, eighth slightly elongated, joints of club increasing in length, last
two more robust than the ninth ; maxill.ary i)ali)i slender, lirst two joints
pale piceo-testaceous, third pale piceous-brown. Prothorax rolmst, arciiately,
evenly, and rapidly increasing in width to the middle, where it is slightly
narrower than long ; sides thence rather rapidly convergent ]iosteriorly and
nearly straight ; anterior margin slightly longer and just visibly more arcu-
ate than tlie posterior ; surface strongly tuberculate near the basal angles,
broadly and feebly swollen behind the apical angles, transversely impressed
behind the ap(!X, finely, extremely closely, and soiiufwhat evenly, though at
some points rather confusedly punctured ; canaliculation prominent, im-
pressed, narrow, begiiniing at one-third the length from tlu; apex and nearly
one-half as long as the jironotum. Elytra at base vt^ry nnicli narrower than
the lieaii ; sides moderately divergent posteriorly, longer than the widtli at
base, nearly straight ; together broadly, roundly, and distinctly emarginate
behind ; suture somewhat shorter than the pronotum ; surface depressed,
nearly even, coarsely, closely, and irregularly pur.ctate, scarcely channeled,
but the punctures at a spot behind the middle seem to indicate an obscure
vortex whirl, in most specimens it is (piite distinct under suitable magnify-
ing power. First four abdominal segments very slightly wider than the
contiguous elytra; sicb'S parallel and very feebly arcuate; border very
strong, suddenly much narrower on the fifth segment ; surface feebly con-
vex, rather strongly, closely, and evenly punctulate, interspaces iiolished ;
transvers(i carina(! tricuspid, mi<ldle cusps broad and coarsely acuminate,
lateral excessively short and rudimentary. Legs rather long and slender,
dark fuscous ; first joint of posterior tarsi much more than twice as long as
the second, nnuh longer than the next three together, and three-fourths
longer than the last.

Male, — Fourth ventral segment very feebly and just perceptibly emargi-
nate ill the middle fourth, with the contiguous surface very feebly inipri'ssed ;
fifth segment strongly emarginate in its middh? fourth at apex, emaigination
evenly rounded, six times as wide as deep, contiguous surface; cylindrically
impressed throughout anteriorly ; sixth segment strongly sinuate at apex,
Binus about equal in width ami curvature to the apices, rather acutely

COLEOPTERA.

29

louiiilcd at till) Twttom, about twice as wide as deep ; soventh segment
Lroadly and IVubly emarginate at tip.

FitiKili', — Sixtli ventral segment rather acutely rounded behind.

Len^'th ;?.4-)>.8 nun. (in an exeei)ti()niil ease 3.2 mm.).

New IlaniiKsliirc (White Mts.),4 ; Luke Superior (Marquette, Miohi-
picoten River, Giirgantuu, Isle Hoyale), (iO ; Biitisii Colimibia, 1.

From the above list of localities this s|)(!cies is shown to have a
very e.xtensive range; it is also very aliundant. Although very dis-
tinct in f'acies, the vortex spot is so indistinct that isolated specimens
may not be placed at first in the sidxlivision to which it is here
ri'lernid. The several characters ajipear to vary very slightly in
degree, more particularly in th(.' degree of cylindrical impression of
the fifth segment. The specimen from British Columbia has the
punctuation of the pronotum a little less dense, and that of the elytra
a little liner and deeper, but otherwise it exactly resembles the Eastern
representatives.

14. S. I'aiiops 11. sp. — Form very slender. Pubescence excessively fine,
short, and sparse, nearly invisible. Head very robust, much less than twice
as wide as long ; interocular surface not twice as wide as the eye, distinctly
di'prcsseil, lon;;;itudinal elevation very narrow, fusiform, short, strongly and
evenly convex, impunctate and somewhat prominent ; punctures very close,
rather fine, confusedly coalescent ; ocular lines meeting at slightly more tlian
one length in advance ; antennai; much longer than the width of head,
slender, piceous-brown throughout, club moderate; third joint very long
and slender, feebly curvTite, slightly more than one-half longer than the
fiiurth, foui-th and fifth joints equal, sixth very slightly shorter and dis-
tinctly more slender than th(^ si'veiith, abruptly much shorter than tlie fifth,
eighth three-fourths longer than wide, as thick as tlie seventh, oval, joints
of dull inoeasing uniformly and rapidly in length, uniformly and very
gradually in width ; Joints three, four, and five together are as long as the
lemaining six together; maxillary palpi very long and slender, very pale
finvat't throughout; mentum bearing two flavate setae near the base. Pro-
thorax widest at the middle, where it is three-fourths as wide as the head,
and nearly one-fifth narrower than long ; sides thence nearly straight ante-
riorly, nearly eijually converg(!nt and very feebly sinuate posteriorly ; anterior
margin shorter and much more arcuate than the posterior; surface rather
coarsely and extremely irregularly sculptured ; canaliculation obscun '.y de-
fined, just behind the middlt- it is visible as a very distinct but indefinitely
outlined impression. Elytra at base narrower than the head ; sides very
feebly divergent posteriorly, longer than the width at base, feebly arcuate,
more distinctly so toward the apices ; together broadly and rather feebly
emarginate behind; suture slightly longer than the pronotum; surface
rather broadly depressed toward the basi^, very coarsely, extremely closely,
('eeply, and irregularly channeled, interspaces acute. Abdominal segments
decreasing uniformly and extremely gradually in width, first distinctly nav-

80

NOKTIl AMEKICAN

rower than the conti^'noiis elytra ; siirfiiec sioincwliat narrowly and Htnmfrly
convi'X, linely, fcclily, nvt-iily, and distantly punctiilate, interspaces lii<,'lily
jjiilislii'd ; transverse earinae trieus]iicl, eiisps all ronndeil, liread, soniewhat
jironiineiit, and hecdtnin}^ ainalj,'aniateil witli the f^eneral snrt'ace of the seg-
ment'. Legs long and slender, pale rnfo-piceous ; lirst joint of posterior tarsi
more tlian tliree times as lonj; as tlii' se('on<l, and twice as lon<; as the fifth,
joints two to four nnit'ormly and f^raduaily decreasing in length.

Mali'. — Snrfaces of the third and fourth ventral segments flattened through-
out their middle fourth and tiiird res))ectively, edges of flattened area provided
with very long downwardly and inwardly curvate setae, edges of segments
Scarcely modified ; fifth segment emarginate in its middle third at apex,
emargination evenly rounded throughout, slightly mor(! than four times as
wide as deep, coniiguous surface deeply and cyliiidi'ically impressed through-
out anteriorly, borders of impression liaving setae similar to tliose of the third
ami fourth .segments ; sixth segment sinuate at apex, sinus scarcely one-half
as wide as the apices, acutely rounded at bottom and at the exterior angles,
slightly wider than <leej) ; seventh seguient very deeply, broadly, and roundly
emarginate at ai>ex, teeth well developed, directed inward.

Female. — Unknown.

Length 4.4 mm.

Sontlicrii States (locality not specified), 1.
A very tlistinct and unmistakable speoie.s.

ITi. S. (lelaivarenSitS n. sp. — Form slender. Pubescence very short
and fine, longer on the abdomen, where it is recumbent, fusco-cinereous.
Head mo<lerate, twice as wide as long ; interocular surface nearly flat, two and
one-half times as wide as the eye, eciually trihdied by the distinct sulcations,
intermediate surface rather strongly and evenly convex ; ])unctures round,
miniito, and evenly distributed, interspaces as wide as tlie punctures, polished ;
ocular lines UKH-ting at om; and one-half lengths in advance ; anttuinae slen-
der, slightly longer than width of head, piceous, basal joints darker, club
moderate ; third joint one-third as long again as the fourth, fourtli and fifth
e(iual in length, seventh twice as long as the eighth, joints of club increasing
in length, last joint acuminate at tij) ; maxillary paljii piceous, first joint
paler. Prothorax widest before the middle, where it is one-fifth narrower
than long ; sides thence feebly convergent posteriorly and nearly straight;
posterior margin slightly longer than the anterior, equally arcuate; surface
with two rudimentary tuberculations at each side, very feebly, minutely,
and somewhat irj'egularly punctate, intersi)aces generally twice as wide as
the punctures, shining ; canaliculation well marked, fusiform, bottom round-
ing, conmiencing before the middle and extending jmsteriorly a distance
ei^ual to ont!-half the total length, deeper posteriorly. Elytra at base about
as wide as the head ; sides feebly divergent posteriorly and very feebly
arcuate, about equal in length to width at base ; together very broadly and
som«!what feebly emarginate posteriorly ; suture equal in length to pronotum ;
surface slightly impressed on the sutui-e, rather depressed, very unevenly
punctured, near the inner basal angles the punctures are very fine and
round, interspaces twice their w idth, shining ; near the outer apical angles,

COLEOI'TERA.

31

tlit'i-c is an oval patch wliicli is coarsely, very closely, mid tortuously chan-
neled. Abdominal sc<j;iiients decreasing extremely gradually and regularly
in width, first as wide as the contigU(jns elytra ; border at lirst very j)ronii-
nent: surface convex, extremely finely jiunctulate ; transverse ciirinae tri-
cuspid, middle cusps line and acicular, lateral rudimentary, intervals broadly
sinuate. I'nder surface pice<i\is. Legs moderate, pale piceous-brown ; lirst
joint of posterior tarsi two-thirds longer than the second, second nearly ixt
long as till- third and fourth together.

Mule. — I'nknown.

Fiiuiili . — Posterior edge of the sixth ventral segment very evenly rounded.

Length 3.;5 mm.

Middle States, 1.

TIk! clytral sculpture of this spt'(!ies is so peculiar that it eaii
scareely be inislakeii if at all constant ; the oval channeled patch is
(jiiite isolated in a generally smooth Held.

1(1. S. sectutor n. sj>. — Form very moderately robust. Pubescence
rather short, coarse, semi-erect, much nior<' iilcntifiil along the sides of the
al)d(jmen, fulvous tluduglioiit. Head moderate in size, twicer as wide as
long : interocular suifact^ moderately depressed, longitudinal elevaiion nar-
rower than the lateral portions, very strongly and evenly convex, suli;ations
very prominent; punctures close, deep, rather confused, longitudinally elon-
gated; ocular lines meeting at one length in advance; antennae slender,
slightly longer than the width of head, basal joint black, remainder rather
pale pic(!OUs-brown, club moderates ; third joint sliglitly less than one-half
longer than the fourth, fourth and fifth equal in length, sixth very slightly
longer an<l much thinncir than the seventh, eighth nearly twice as long as
wide, slightly thinner than the seventh, and as long as the ninth, joints of
club increasing in length, last two of equal thickness and more robust than
the ninth; maxillary palpi piceous-brown throughout, first joint scarcely
perceptilily paler. Prothorax widest at the middle, where it is distinctly
narrower than long ; sides thence equally convergent anteriorly and poste-
riorly, slightly arcuate in the former, deeply sinuate in the latter direction :
anterior and posterior margins nearly equal in length and curvature ; surface
distinctly tuberculate at a short distance from each basal angle, and slightly
impressed on the Hanks of the pronotuni in the middle, finely, very closely,
confusedly punctate, interspaces granulose and scarcely shining ; ('analicu-
lation short, narrow, and very deep, deft-like, one-half as long as the pro-
notuni, beginning slightly before the middle. Elytra at base as wide as the
head ; sides feebly divergent posteriorly, slightly longer than the width at
base, distinctly and nearly evenly arciuate ; together broadly and very
moderately emarginate behind ; suture nearly one-fourth longer than the
pronotuni ; surface feebly impn-ssed on the suture at the base, moderately
coarsely, closely, somewhat deeply, and very irregularly punctured and
channeled, interspaces as on the pronotuni, tiiough slightly broader. Abdo-
minal segments decreasing just perceptibly in width, first slightly narrower
than the contiguous elytra ; surface finely and closely punctulate, and dis-

82

NOUTII AMKUICAN

tinctly Ri'niiulosc ; transverse (iarinao tricuspid, lateral cusjis imicli sinaller
than tli<' iiiiddli', the latter fnicly ancl rapiilly acuminata toward tips. Legs
moderate, dark ideeous-lirown, nearly black aliove, dark t'usco-piceous be-
neath ; llrst joint "f the posterior tarsi four-lifths longer than tlie second, and
as Ion;: as the next two to^etlier, slightly longer than the last. Hody winged.

Mill'. — Fipiirth ventral segment eylindiically and feebly impressed in its
middle third, edge entire ; fiftli segment eniarginate in its mi(hlle third at
ai)ex, emargination evenly loundeil ami nearly seven times as wide as ileep,
contiguons snrt'ace eylindrieally and rather deejily impressed nearly through-
out anteriorly; sixth segment sinuate at apex, sinus mncli narrowei' and
more acutely roundeil than the iipiees, slightly more than one-third wider
than (h'ej) ; seventh segment broad and robnst, nearly transversely truncate
at tip, lateral setae small.

Fi'inulf. — Sixth segment very broadly and (evenly rounded behind.

Length ;^. -4-4.(1 mm.

Washington Territory (Thurston Co. and Tonino), 4.

17. S. ZUIlicilS n. sp. — Form somewhat robust. I'libescence rather close,
coarse, more abundant on the abdomen, wliere it is very pale tlavo-cinereous,
elsewhere plumbed-cinereous. Head moderate, twice as wide as long; inter-
ocular surface just percei)tibly depressed, more than twice as wiih; as the
eye, longitutlinal elevation as wide ns the lateral portiors, evenly and feebly
convex; punctures moderate in size, rounded, deep, isolated and unevenly
distributed, interspaces nearly Hat and somewhat polished ; ocular lines
meeting at fully two lengths in advance ; antennae longer than the width of
liead, slender, basal joints black, remainder dark j)iceous-brown, club dis-
tinct ; third joint scarcely one-eighth longer than the fourth, joints threti to
six uniformly decreasing in length, sixth and seventh eonal in length, the
hitter much the thicker, eighth one-half longer tlnn wi(h', strongly conical,
base small, joints of club inci-easing very gradually in length, nearly of ecjual
width : maxillary palpi well developed, first joint dark piceous-brown, second
slightly darker, third piceous-hlack, nearly as long as the first and second
together, rather robust, densely setose. Prothorax arcuately, almost evenly
and rapiilly increasing in width to the middle, where it is six-sevenths as
wide as the head, and <listinctly narrower than long ; sides thence feebly
convergent posteriorly and slightly sinuate ; anterior margin shorter and
much more arcuati' than the posterior; surface tuberculate near the basal
angles, finely, cleei)ly, and somewhat closely punctate, punctures somewhat
rounded and distinct, crowded anteriorly, and isolated by nearly their own
widths in the middle, inters])aces rather feel)ly convex and shining; canali-
culation beginning at the mi<ldle, one-third as long as the prcniotum, rather
narrow, impressed, somewhat shallow but distinct. Elytra at base as wide
as the head ; sides rather feebly divergent jiosteriorly, slightly longer th.an
the width at base and very feebly arcuate, more strongly so toward the
apices ; together broadly, roundly, and distinctly emarginate behind ; suture
nearly one-third longer than the pronotuni ; surface strongly and broadly
impressed on the suture at the base, also very feebly so mar the humeri,
somewhat closely, finely, and very irregularly punctate, somewhat channeled

COLKOPTEUA.

88

ill thfl iiciKlihnrlinod of <li(> Hpiral jnut bfliind tlio centre, and ncai- tlic oxtti-
I'idi' iiini'tjin of i-acli rlytr.>n, intcrsiiaccs Hoiiit'wliat Hat ami sliininj^ near tliu
suture and the liasc Abdominal scginenta decreasing uniformly and gradu-
ally in widfli, first very sliizlitly narrower than the (.'onti<,'Uoiirt elytra; sur-
face strongly, finely, soinewiiat closely and evenly punctiilate, much more
minutely so posteriorly, interspaces liiglily polished and flattened ; trans-
verse carinau tricuspid, cusps all long and nearly of e(nial length, middle
liiiely acicular, lateral rather coarsely acuminate. Legs moderate, piceoiis-
Mack aliove, fuscous hi'iieatii ; lirst joint of jiosterior tarsi two-thirds longer
than the second, as lon;^ as the 'lext two together, and as long as the fiftii.

Afdie. — Third and fourth ventral segments just visibly emarginatt! in the
mid<lle fourth and third respectively, contiguous surfaces V(!ry feebly flat-
tened; fifth segment emarginate in the middle thinl at apex, emargination
more acutely rounded at the bottom, sides nearly straight, six times as wide
as det!]), contiguous surface strongly flattened throughout anteriorly ; sixth
segment very deei)ly and strongly bilobed at tip, cusp narrow, arms near
the apex nearly straight, point very slightly rounded, emargination nearly
twice as wide as deep ; seventh segment <leeply (Muarginate at tip, bottom of
emargination nearly transvers<', ti-eth strong.

FiiiKile. — Sixth segment bioadly and evenly rounded behind.

Length 3.4-4.0 mm.

\rizonu (Morrison), 5.

18. S. femoratllS Say. — Form moderately robust. Pube.scence short,
coarse, rather sparse, sub-erect, fulvous on the abdomen, cinereous elsewhere.
Head robust, more than twice as wide as long ; interocular surface distinctly
depressed, twice as wide as the eye ; longitudinal elevation slightly narrower
than the lateral portions, (sviuily and moderately convex, sulcations rather
prominent; punctures fine, rounded, evenly distributed, and in exceedingly
close contact ; ocu....r lines meeting at nearly one length in advance; antennae
very slightly longer than the width of head, shaider, basal joint black,
remainder piceous-brown, club darker and prominent ; third joint one-third
as long again as the fourth, fourth and fifth equal, sixth and seventh equal
in length, the latter slightly more roViust, eighth joint one-lialf longer than
wide, oval, as thick as the seventh, joints of club increasing slightly in
length, elongated, last two of equal width ; maxillary palpi sbuider, pale
liiceous-brown, basal joint and base of the second pale piceo-testaceous, third
joint very long and somewhat sigmoid. Prothorax widest slightly behind
the middle, where it is very slightly narrower than the head, and slightly
narrower than long ; sides thence equally convergent anteriorly and poste-
riorly ; anterior margin much shorter than the base, the former very arcuate,
the latter very feebly so ; surface strongly tuberculate at a short distance
from each basal angle, tr.ansversely impressed just behind the apex, finely,
extremely closely and irregularly punctat- ; canaliculation beginning slightly
before the middle, one-third as long as the pronotum, narrow, acute at bot-
tom, and very deep, conspicuous. Elytra at base very slightly narrower
than the head ; sides moderately divergent posteriorly, as long as width at
hase, rather strongly arcuate, more particularly toward the apices ; together
Stenini. 3 ,

9^

NORTH AMKKICAN

broadly, roiiniUy, nml rntlit-r strongly t'lnnrginnt*! lieliind ; sntiiro very
Hliglitly loiiX''r tli.'iii tilt' prdiKituni ; siirl'ai'i^ coiivcx, very feclily inii)r('HSHil
on till! xutnrt; iit thf l);isc, rather finfly, very ilt'cjily, cxofiMlingly (closely
and irregularly elianneled. Abdominal segments deereasinj^ uniformly and
rapidly in widtli, lirst distinctly narrower than the eontignons elytra ; siirfaeo
finely, very closely, and eVenly )>iinctnlate ; transverse earinaii tricnsjtid,
tnidiUe cusjis liiii' an<l acicnlate, lateral very short. Legs short and rolmst,,
palt) piceo-rufuus ; lirst joint of jiosterior tarsi two-thirds as long again as
the second, and as long as tlio last, joints two to four uniformly and rapidly
decreasing in length.

Midc. — ^^ecoJld, tiiird, and fourth ventral segments having in the middle
and at thu npex a small triangular area, which is lustrelcHS and very minutely
reticulated ; fifth segment eniargiiiate in its middle fourth at apex, emargi-
nation evenly rounded, eight times as wide as deeji, contiguous surface
feebly impressed ; sixth segment triangularly incised at the apex, incisure
sliglitly wider than deep; seventh segment hroatlly and triangularly euuir-
ginate at apex.

FiiiKile, — Sixti. segment broadly and evenly rounded behind.

Length 3.4-4.2 mm.

Detroit, IMicliigiiii, 1(!; Illinois, 1 ; Wa.sliington, 1). C, 1; Grimsby,
Ontario, 2.

A vi'iy distiiu't s|)ccies in many ways, more especially, however, in
the curious triaiijiuhir patclies at the api(;i'S of the ventral scjinuMits
in the male. 'V\h' male sexual characters seem to vary not a little
in degree, and sp(!cimens are seen in wliich the emargiiuition of the
fifth segment is jnat perceptible, and in which the angle of the incisure
at the ajiex of tin; sixth segment is distinctly rounded. Delinite
varieties or subsi>ecies nuiy be indicated by these variations.

19. S. tacoiliac n. sji. — Form very moderately rolmst. Pubescence fine,
very sparse, except along the sides of tht^ abdomen, short, semi-erect, llavo-
cinereous. Head moderate, twice as wide as long ; interocular surface rather
deeply excav.'ited, nearly three times as widt( as the eye, equally trilobed by
the longitudinal sulcuti(»ns, which are feeble ; intermediate surface feebly
and evenly convex, punctures rather fine ; ocular lines meeting at about one
length in advance, strongly ourvate ; antennae^ longi^r than width of bead,
robust, black, club distinct ; third joint fully one-lialf as long again as the
fourth, fourth and fifth etiual, sixth slightly longer and distinctly less robust
than the seventh, eighth nearly twice as long as wide, cordate, joints of club
of nearly equal width, sligbtly increasing in length. Prothorax widest
slightly before the middle, where it is distinctly narrower than long ; sides
thence very moderately convergent posteriorly ; anterior margin sliglitly
longer and more arcuate than the posterior ; surface nearly evenly convex,
very finely, exceedingly closely, and irregularly punctured and channeled,
interspaces acute ; canaliculation very short and feeble, beginning slightly
before the middle, and equal in length to one-third that of the pronotum.
Elytra at base as wide as the head ; sides nearly parallel, much longer than

COLKOI'TKUA.

3:»

tlio Nvidtli at base, ftiicl very I'l'clily aiciialc ; togctlu'r soiiu'wliat narrowly,
roiiiully, anil vi-ry ntroiigly rniarjiiinatc Ijcliind ; siitiirt' ontt-Mixtli as l(Pii<^
again as tin; ])riin<ituni ; surfacf Huuicwliat fVdily convex, nearly even, (!X-
ceedinu'ly closely anil very irrejjiilariy clianneli'il, interspaces v<'ry acute.
Abdominal se^^inent.s decreasing uiiiforndy and moderately rapirlly in width,
lii'st just peiceptilily narrower than tlie contij^uons elytra ; surface cuarsely
;,'ranulose and lustreless ; margin vory strong; transverse carinae not cusped.
Legs rather luuf^ and hU'ikIlm-, Idauk ; lirHt joint of tlio posterior tarsi much
elongated, two-thirds as long again as the second, and much longer than the
last, second joint nearly as long as the third and fourth together; tarsi of
nearly etiu . thickness throughout, rather slendiu',

iMtilc. — Fifth ventral segment very t'euhly enuirginatc! in its middle th'rd
at a|iex, emargination evenly . lunded and scarcely measural)le, I'ontiguous
surface feelily and eylindrically impressed throughout anteriorly ; sixth
segnuMit sinuate at apex, sinus rather wider and moro feebly rounded than
the apices, evenly rounded, and about (Ivo times ns wid(! as ileep ; seventh
segment triangularly and moderately emarginato at ai)ex, lateral setae well
developed,

Fe.mali'. — Unknown,

I/(mgtli 3,0 mm.

Tliurstoii County, Wasliinfitoii Territory, 1,

A closer scrutiny reveals the tact tiuit tin- tran,sver<e carinae on
some oi" the segments apjjeur to be very minutely 4-cus[)iil, on otliers
even this sign disappears, and tlien; is nothing to he s(ien hut an
irregular denticnlation ol" th«; ciirintil edge. This eont'ornialion will
immediately distinguish the species from several others from the same
region ; the latter liuving the carinae distinctly tricuspid.

Subdivision 6.

This subdivision contains a very large proportion of the species of
division B; they may be resolved for sake of convenience into three
arbitrary groups as follows : —

Length exceeding 2 mm.

I'llytral suture not more than one-third longer than the pronotum 1.

Klytral suture at least one-half longer than the pronotum II.

Minute species not exceeding 2 mm. in lengtli III.

Group I,

We are still confronted in this group by nearly one-half the entire
number of species of the genus Stcnns, and their tabulation in such
a manner as to give a useful and succinct character to each form is
almost an impossibility. We may, however, simplify the subject
slightly, by the following subgrouping : —

86 NORTH A.MKUK'AN

Ti'.'nisvt'i'Mc cnrinni^ of aluloincn li'i<'nsj)iil a,

Ti'iiiihVt'rsc oHi'inac 4-('UH|iiil h.

TrautiVt'i'Nf caiiiint- not cuttpfil <■.

Huligroup ((.

In this siihfjfoiip I Iiavc employed several siihsidijirv elianicters,
(lepeiidinj; upon tin' form of liody and sexual modification ol" (lie male
in order It) form lour sections as follows : —

Fdini extremely slendci', ni'avly eyliiidriral ; elytra iiincli slierter tlian the
prothurax ; lieail inucli wider tlian tlie elytra; length H.l-;{.4 mm.

20. HtraiiKulatiis.

l-'onii very slendi^r, conHpicuously depressed ; sides nearly i)arallel ; alulonien
fully na wide as tho contiguous elytra ; segments decreasing extremely
slow y in width, and usually strongly extended after death ; length
'2.S-;i.7 mm.*
I'rothorax widest distinctly before the middle.

IClytral suture and jironotum nearly fi|U!\l in length.

Form ex('((ssivcly slender ; elytral punctures coarse and rather distant.

21. tennis.

Form slightly more robust ; elytral jjunctures liner and closely

crowded 22. aiignstns.

Elytral suture nuu'h longer than the jironotum.

Sixth ventral segment % (leej)ly and rather narrowly sinuate jiosti'-

riorly 23. diflicilis.

Sinus of sixth segnuuit % extremely hroad and feehl(\..24. I*(>tfiti.
Prothorax widest at or slightly heliind the middle 25. sci'npens.

§§§

Male having the lateral borders of the impressed area of the fifth ventral seg-
ment, in the form of r-dges which ternunate posteriorly in acute teeth.
Large species. Length 3.7-4.8 mm.

* Tho insects in this small section increase gradually in robustness in the
order given from Uniiis, which is very slender and more liliform than any
other within our territory, to scruji'iis which, although elongated, is slightly
more robust than two or three of the next section, as, for instance, siihtili.t,
imlitjfnf, and iuijrtitiis; it will therefore be merely safer, if the species be a
slender one, to first consult this table and its accompanying descriptions
before proceeding to the larger table following. Tlie section is retained dis-
tinct because of tho depressed appearance as well as the slender form of the
species comprised within its limits. The protrusion of tho abdomen may
result from the manner in which the insects are killed; if in alcohol the
abdomen is generally protruded. I can only state that in all the specimens
before mo the abdomen is extended, and do not pretend to assert that this is
a physiological peculiarity.

rOLKOI'TEIlA.

n?

IIi'.'uI \viili> ,'iiicl ri)l>ii>it, as liroiiil as <ir liroailt-r tli/iii tlm elytra.

[..'•^s Mack 'ill. illtrilHiiH.

I.('}j;s ratlicr |iali- ]ii('i>nnM-liro\vn '27. orytlll'opils.

Ili'.id small, narrower tliaii tlie elytra; piiiuttiiatioii iiiiu'li closer.

I'mictiires of nl)cloini>)i extremely closely (;ro\vile(l ; mirfaco opaipie. Ili'.iit

les-* tliaii twice us wiile as loll;,', Cdlorail" 2S. rilKilVr.

riiiicttires of al)4omeii less crowileil ; intersiiaoes distinctly visidle, sliiii-
iii;;. Heail distinctly more tlian twiuo an wide as lonj;. White Moun-
tains, N. H 20. aiiuHtoinozaiiH.

mi

Tlic ftillowiii^ talile is simply iiiU'inlcil as mi indication of tlio
approximate position of tim species, ami is only to bi; (Icpcmled upon
as an aid to tlit) consultation of tin; descriptions : —

Elytral suture in len^'tli e(|ual to or sliorter than the promitnm.

I'i'otliorax wi<ier than louj,', scarci'ly narrower than the head. I'onu

roliiiKt, depressed :il>. Hll<»Mll<>liis.

I'rothorax narrower than lonj;.

I.arye spucit^s 4.0-4.2 mm. in lengtli, slender. Vancouver Island.

:!1. iiisiilariH.
ypecies not oxceedinj; li.l mm. in h'iii,'tli.

Robust, depressed; olytral sculpture very coarse. \VHsliint,'t()ii Tciri-

tory ;12. vt>xatlls.

Much more slender, rather conv(^\ or suh-cylindriual ; elytral sinilp-
ture ratlior lino and even. Massachusetts.
I'rotliorax widest before the middle.

c<I)ecies 2.b-IJ.() mm. in length ; hea<l large ; interocular Hurface

rather deeply excavated 'M. Sc'llWai'Zi.

Hpecies 2.1-2.3 mm. in longtli ; head small.

Longitudinal elevation of interocular surface distinct ; sides of

elytra distinctly divergent posteriorly :{4. |iaillll'l'.

Longitudinal ehivation obscure ; sides of elytra almost exactly

])arallel ^.O. siilitilis.

Prothorax wiih'st behind the middle 3(J. iiidigeiis.

Elytral suture longer than the pro)iotum.
Species 3.0 mm. or mor(! in length.

Longitudinal elevation of interocular surface indistinct or nearly obsolete,
("analiculation of prothorax very shurt, rather conspicuous, situated

behind the middle. Oregon 37. simplex.

Canaliculation very fei^bh:, ext(Midiiig nearly the entire length of
the pronotum. District of Cohimljia, reiinsylvania, Alabama.

3S. viciiiiis.
Canaliculation excessively feeble, btuiig reduced to a sinqile erosion,

situated just behind the mi(bile 39. iligratllS.

Longitudinal elevation of interocular surface distinct.

Large species, about 4.0 mm. in length 40. lieglectllS.

Smaller species, not exceeding 3.3 mm. in length.

38

NORTH AMEHICAN

IIi'.iil larj;*^, luiioh wider than the elytra at base. ...41. scabiosiis.
Head small, narrower than the elytra at base.

Body very robust ; elytra very feebly impressed on the suture at
the base ; longitudinal elevation of head rounded.

42. -vespertiiiiis.
Body mn<'h more slender ; elytra strongly impressed on tlie suture
at the base; longitudinal elevation of head rather aeute.

43. convictoi*.

Species less than 3.(1 mm. in length.

Longitudinal elevation of iiead acute and prominent; canaliculation of

]ironotum short, de(>p. and conspicuous 44. COIlfllSllH.

Longitudinal idevation ratiier obscure, broadly rounded ; canaliculation
of pronotum very ol)scuro, '.eing simjjly a very feeble erosion, in
some cases almost obsolett!.
I'rotliorax widest distinctly before the middle.

Larger apecie.s. Legs black 45. inoi'iiatiis.

Smaller s])ecies. Legs fuscous 40. lllacidllS.

I'rotliorax widest at or beliind tlie middle.
Sides of prothorax nearly straight in front of the broadest section,
at which point they are rather acutely angulate. Massachusi^tts.

47. mendax.

Sides of prothoraj. strongly rounded anteriorly, not angulate, broadly

roumled at the widest section 4S. ei'ieiisis.

Subgroup h.

Head large;, much wider than the elytra at base 49. spllicrops.

Head e(iual in width to the elytra at base 50. Illilitai'is.

Head distinctly narrower than the elytra at base.

Head extremely t: J, all ; interocular surface broad; eyes narrow. Massa-
chusetts 51. plilto.

Head slightly broader ; interocular surface narrow ; eyes wide and very
convex. Arizona 52. illCUltUS.

Sr.bgroup c.

Elytral sutui ■ much shorter than the pronotum 53. ptei'Obracliys.

Elytral sutun' distinctly longer than the pionotum.

Prothorax distinctly elongated ; legs black throughout ; form robust ; elytra
finely, deeply, evenly, and \ery closely punctate ; surface rough and

nearly opaciue 54. corviia.

Prothorax about as wide as long ; legs not black ; form more slender ;
elytra coarsely punctate : surface generally shining.

Ijarge species, 4.2-4.5 mm. in length 55. inaritiiniis.

Small species, not exceeding 3.0 mm. in length.

Form slender ; punctures of elytra airiest entirely isolated. White

Mountains, N. 11 5ti. moiltaillis.

Form more robust; somewhat depressed; punctures of elytra gene-
rally close and coalescent. Colorado and Britisli Columbia.

57. alpicola.

COLEOPTERA.

89

■oliiacliys.

laritimus.

20. S. gtranglllatus n. sj). (l-'auvel MS.). — Form very slomliM'. Piibus-
ociice exccssivi'ly sliort, HiU', and sparse, sotiform, ciDornous. Head v«ry
large, luit twic(( as wiilo as long ; inti'rociilar surface tiirec-foiirtlis as wide
again as tlio eye, ratlier (h^eply excavated, finely and feebly imnetared,
interspaces (^qnal in wiilth to the punctures, shining, minutely reticu-
lated ; longitudinal suleations closely a])proxiniate and distinct ; inter-
mediate surface very moderately and (!V(M\ly convex ; ocular lines meeting
at less than one length in advance ; antennae very long and slender, much
longt'r than width of head, dark piceous-brown throughout, club narrow :
third joint tbice-foui'ths as long again as tin; fourth, and nearly as long as
the fourth and fifth together, fourth and fifth e(iual, eighth one-half as long
as the seventh, joints of club increasing in h^ngth, last joint nearly as long
as the ninth and tenth together; maxillary palpi long and slender, pale
testaceous throughout, last joint much elongated. Prothorax widest slightly
before the middle, where it is three-fourths as wide as the head, and one-fifth
narrower than long ; sides from the middle rather strongly converg(!nt poste-
riorly and strongly sinuate ; anterior margin longer and more arcuate than
the posterior ; surface evenly convex, coarsely and very irregularly punc-
tate, interspaces at some spots equal in width to tlu! punctures, somewhat
shining and very minut(dy reti-nilated, at others acut(( ; canalii.'ulatioii
almost obsolete, one-half as long as the ])ronotum, terminating at equal dis-
tances from tlu! anterior and posterior margins. Elytra at base scarcely
three-fourths as wide as thi> head ; sides very feebly divergent post(!riorly,
slightly longer than width at base and rather strongly arcuate; together
broadly and just perceptibly emarginate posteriorly; suture much shorter
than the pronotum ; surface even, somewhat depressed : very coarsely,
closely, and somewhat irregularly punctured. Abdominal segments just
perceptibly decreasing in width posteriorly, llrst as wide as the contiguous
elytra ; border prominent ; surface very convex, coarsely, feebly, anil dis-
tantly punctulate, moderately shining ; transverse carinae tricuspid, cusps
acute and aciculate, middle twice as long as the lateral. Legs very long and
slender, pale piceous-brown throughout ; first join! of posterior tarsi some-
what longer than twioe the second, as long as the next three together, second
visibly long"r than tlie third.

Male. — Posterior edge of the fifth ventral segmiiut deeply and broai'ly
emarginate in its middle third, notch four times as broad as deep, almost
transverse at the bottinii, contiguous surface deeply and conically iiupi'essed
for one-half its length anteriorly, borders of the impression in the form of
very acute ridges, which terminate posteriorly in two long, very acute teeth,
projecting over and beyond the emargination ; sixth segment sinuate at apex,
sinus small, four timers as wide as deep, and evenly rounded at tlui bottom.

Female. — Sixth ventral S(!gmeut evenly rounded behind throughout its
width.

Length 3.1-3.4 mm.

New York, 1 ; Detroit, Mioliigan, a.
Very distinct and unmistakable in form.

40

NOUTII AMERICAN

-1. S. tenuis n. sp. — Form very slender, sides parallel. Pubeseenee
liKideratcly long, line, reeuiiilieiit, sparse, pale i'ulvo-ciiiereous, metre fulvous
on the abdomen. Head moderate, twice as wide as long ; interouular surface
nearly Hat, equally trilobed by the very feeble sulcations ; intermediate sur-
face very feebly convex ; punctures moderately coarse, evcaily distributed,
separated by one-half their own widtlis interspaces sliining ; ocular lines
meeting at one lengtli in advance ; maxillary jtaljii pale piceous-brown, basal
joint opaque, llavate. Prothorax widest slightly in advance of the middle,
wliere it is distinctly narrower tiian long; sides rather strongly converg(!iit
and jiiit perceptibly sinuate posteriorly, rather b^ss convergent and vei'y
feebly arcuate anteriorly ; anterior margin sliglitly longer and niucli more
arcuat(^ tlian the jiosterior ; surface feel)ly tuberculate near the basal angles ;
rather Ihiely, modei'ately closely, evenly jmnctured ; jtunctures irregular in
shape, interspaces rather convex, highly polished ; canaliculation just visible
as a narrow, very feeble impression, about one-half as long us the pronotum,
terminating at nearly equal distances from the base and apex. Elytra at
base just perceptibly narrower than the head; sides moderately divergent
posteriorly, longer than the width at base and feebly arcuate ; together very
broadly, roundly, though moderately emarginate behind ; suture very slightly
longer than the pronotum ; surface rather dejjressed, feebly imp-essed along
the suture, more particularly toward the base, coarsely a ..^.irly evenly
punctate, intersi)aces two-thirds as wide as the punctures, feebly convex and
higlily polished, punctures very seldom coalescent and then only partially so.
First three abdominal segments equal in width, and as wide as the contiguous
elytra : surface finely, evenly, and rather distantly punctulate ; punctures
impressed, interspaces highly polished; posterior edges of the segments im-
punctate ; transverse carinae tricuspid, middle cusps long and acicular, lateral
very rudimentary. Legs rufo-fascous, moderate in length ; last joint of the
anterior tarsi nearly ecjual in length to the three preceding together.

Male. — Fifth ventral segment emarginate in its middle fourth at ajtex,
euiargination evenly rounded, nearly ten times as wide as deep, contiguous
surface feebly impressed throughout anteriorly ; sixth segment triangularly
incised at ap(!X, incisure small, slightly wider than deep; seventh segment
feebly and roundly emarginate at apex.

Femalo. — Unknown.

Length 3.2 mm.

Grimsby, Ontario, 1.

The type specimen is in a very dilapitlated condition, lacking the
antennae and jmsterior tarsi. Tlie species diff(!rs from dljfieilis in its
much more slender form, sexual ciiaracters, and sculpture.

22. S. anglistlis n. sp. — Form slender, sides parallel. Pubescence
sparse, short, line, sub-recumbent, ratlier inconspicuous. Head moderate,
twice as wide as long; interocular surface more tlian twice as wide as the
eye, nearly flat, equally trilobed by the very feebly longitudinal sulcations,
intermediate surface rather feebly and evenly convex ; punctures moderately
small, rounded, not coalescent, evenly distributed and close ; ocular lines

COLEOPTKUA.

11

meeting at nearly two lengths in advance ; antennae distinctly longer than
the width of head, moderately robust, piceous-brown, basal joint black, club
very slendctr ; third joint one-fourth longer than tlu^ fourth, fourth and fifth
(Mjual, sixth and sevi^nth joints much shorter than the fifth, ecjual in length,
the latter slightly more robust, eighth two-thirds as long as the seventh,
equal to it in width, joints of club increasing in length and thickness ;
maxillary palpi slender, first joint opanue, llavate, second and base? of the
third very slightly darker, piceo-llavate, remainder piceous-brt)\vn. Pro-
thorax widest much before the middle, where it is distinctly narrower tlian
long ; sides thence nearly equally convergent anteriorly and posteriorly,
distinctly arcuate in the former, nearly straight in the latter direction;
anterior margin slightly longiM- than the posterior, equally arcuiite; surface
gradually, narrowly, and feebly swollen toward the basal angles, rather
coarsely, VL'i-y closely, evenly, and sub-variti!ately punctured, punctures
polygonally crowded ; canaliculation very fe(d)le, tenninalin^ at equal dis-
tances from the base and apex. Elytra at base much narrower than the
head; sides moderately divergent posteriorly, very slightly lougc- thnu the
width at bas(?, very feebly arcuate ; together broadly and feebly emarginate
behind; suture just perceptibly shorten' than the pi-onotum ; surface rather
ilepressed, very feebly and narrowly impressed on the suture, rather coarsely
and closely punctate, j)unctures fre(iuently coalescent near tiie middle of the
elytra, interspaces polished, minutely reticulated. Abdominal segments
decreasing sub-uniformly and extremely slowly in width, first three nearly
of equal width, and as wide as the contiguous elytra ; surface coarsely and
rather closely punctulate, punctures imi)i-<.^.>jed, interspaces polished ; trans-
verse carinae tricuspid, middle cusps long and finely acicular, lateral very
rudimentary. Legs rather slen<ler, rufo-fuscous, tips of femora darker ;
first joint of the posterior tarsi three-fourths longer than the second, second
slightly longer than the third.

Mall', — Fifth ventral segment scarcely modified ; sixth broadly truncate at
tip, truncation very feebly sinuate throughout nearly its whole length as in
Pellitl; seventh segment rather deeply emarginate at tiji.

Female. — Sixth segment very evenly rounded behind, somewhat narrow.

Length 2.8-3.0 mm.

Grimsby, Ontario, 1, 9; Tyngsborough, Massucbiisetts, 1, %,

2:!. S. diflicilis n. sp. (Schwarz MS.). — Form slender. Pubescence ex-
ceedingly fine and short, setiform ; longer, recumbent, and more abundant
at the tip of the abdtmien, cinereous. Head rather large, twice as wide as
long ; interocular surfa(;e nearly fiat, three times as wide as the eye, equally
trilobed by the very shallow, longitudinal sulcations ; intermediate surface
feebly convex ; finely, evenly, and somewhat closely punctured, interspaces
one-half fis wide as the punctures ; ocular lines meeting at about two lengths
in advanc(^ ; antennae moderately slender, but very slightly longer than
width of head, piceous-brown, basal joint nearly black, club moderate ; third
joint one-half as long again as the fourth, fourth distinctly shorter than the
fifth, eighth short and sub-globular, joints of dub increasing in length, last
two equal in width, last acuminate at tip ; maxillary palpi slender, first joint

' . I

iBH

42

NORTH AMERICAN

palo tcstacoons, secoiul and tliird darker, testaceous. Prothorax widest
before tlie middle, where it is tliree-fourtlis as wide as tlie head, and one-
sixtli narrower tliaii long ; sides thenee moderately convergent i>osteriorly
and very slightly sinuate ; anterior and posterior margins eiiiial in length,
the former more arcuate ; surface with two very faint tuherculations on
each side, e(|ni-distant from each other and from the anterior and ]iosterior
margins ; canalicnlation rather ohscun^ connnencing at tln^ middle and ex-
tending almost to the posterior margin ; slightly unevenly, coarsely, and
vaiiolately ]innctnred, interspaces uneijnal in width, very slightly convex,
jiolishi'd. Elytra at hase somewiiat narrower than the head ; sides notably
divergent posteriorly, evenly and feebly arcuate, slightly longer than the
width at base ; together broadly and very feebly einarginate posteriorly ;
suture about eq^ual in length to the pronotum ; surface rather coarsely and
unevenly punctured, punctures rather deeply impressed, closer and more
ooalescent externally, interspaces near the suture about ones-half as wide as
the punctures, shining, minutely reticulated. First three abdominal seg-
ments ('(lual in width to the contiguous elytra ; border strong; surface shin-
ing, rather coarsely puiU'tulate anteriorly, more; closely and finely so ])Oste-
riorly ; transverse carinae tricuspid, cusps all very rudimentary, intervals
nearly straight. Legs rufo-j)iceous, moderate ; first joint of posterior tarsi
one-half as long again as the second, second notably longer than tin! tliird,
thinl and fourth equal in length. Under surface of abdomen dark piceous,
finely and closely punctulate.

Mull'. — Posterior edge of fifth ventral segment rather feebly emarginate in
the middle, emargination indefinitely terminated laterally, contiguous sur-
fac(> very feiddy and longitudinally impressed in its middle third, bonlers of
impr(>ssion furnished with long, recumbent, piceous setae ; sixth segment
broadly sinuate at apex, sinus evenly and somewhat acutely rounded at
bottom, and about three times as wide as deep, surface of segment not im-
pressed ; seventh segment broadly and very fe(d)ly emarginate at apex, emar-
gination almost transverse, terminating laterally in two strong, posteriorly
proji'cting tcseth.

Ffmile. — Sixth segment broadly and very evenly rounded behind.

Length 3.0 mm.

IMiddlc State.*, 1 ; Massncliusctts, 1 ; Grimsby, Ontario, ?>.
Very readily distiiif!:iiished by tlie I'ourtli joint of the antennae,
which is, ratlier anomalously, shorter than th(> fifth.

24. S. Pettiti n. sp. — Form slender. I'ubescence close, rather coarse,
short, sub-recumbiuit, evnly distriliuted, cinereous, with a slight fulvous
tinge on the abdomen. Head robust, not twice as wide as long ; interocular
surface very feebly depressed, twict! as wide as the eye ; longitudinal eleva-
tion narrower than the lateral portions, rather feebly and evenly convex,
distinct ; punctures fine, rounded, not coalescent, evenly distributed, and
very close ; ocular lines meeting at slightly more than one length in advance ;
antennae very slightly longer than the width of head, rather robust, piceous-
brown, basal joint black, club very moderate ; third joint one-third longer
than tlie fourth, joints four, five, and six uniformly and rather rapidly de-

COLEOPTEKA.

4.1

creasing in length, six anil seven eijiinl in length, tlie latter nuich niore
robust, eighth slightly shorter than the seventh, strongly clnliberl, jeiiits of
elnb elongated, nearly i>f eciual width, ninth anil tenth e(|ual in len^'tli, last
slii,'litly longer ; maxillary palpi long, jiiceous-hrown, basal joint llavate.
Prothorax robust, arcuately widening to a point slightly in advance of the
middle, where it is about as wide as long ; sid(>s nioderat(dy convergent
posteriorly and nearly straight; anterior and posterior margins ecjiial in
lengtli, tlie former slightly the more arci'ate ; surface feebly swolh^n near
the basal angles, closely, finely, somewhat confusedly punctate; canalieula-
ti )n nearly obsolete, more distinct just btdiiml the middh', feebly impressed.
Elytra at base as wide as the head ; sides rather strongly divergent poste-
riorly, longer than the width at base, feebly arcuate, much more strongly so
toward the apices ; together broadly, somewhat angularly and distinctly
emarginate behind ; suture nearly one-sixth longer than the pronotiim ;
surface strongly imjiressed on the suture toward the base ; rather coarsely,
very closely, and sonunvhat evenly punctate, intc^rspaces acutely convex ami
very narrow. Abdom'. ' segments d(!creasing extremely slowly in wi<lth,
first two of e(jual width, and as wide as the contiguous elytra ; surface
coarsely, sub-variolately, very closely and evenly punutulate ; transverse
carinae tricuspid, middle cus])s long and very finely acuminate, lateral
rather rudimentary. Legs moderate in length, rufo-fuscous, tips of femora
darker; first joint of posterior tarsi four-fifths long(!r than the second, and
longer than the last, second distinctly longer than the third, third and fourth
sub-(!iiual.

MiiIh. — Posterior e<lge of fifth ventral segment just perceptibly and roundly
emaiginate in its middle fourth, contiguous surface very feebly flattened
throughout; sixth seg^nei.t truncate at apex, truncation very feebly, just
visibly and very broadly sinuate.

Ftimilc. — Sixth segment veiy broadly and evenly rounded behind.

Length 3.0-3.2 mm.

Grimsby, Oiitiirio, 1 ; MicMU; Stsites (locality not given), 1.

This species, altliotijili resembling dijficifis somewliat in form, is
totally distinct in the character of the sexual modifications. It is
dedicated with pleasure to Mr. J. Pettit, of Grimsby, Ontario.

The parasite is small, very convex, highly polished, twice as long
as wide, regularly oval, and slightly longer tlian the first joint of the
posterior tarsi ; it is cinereous in color ; the long bristles are few in
number, and aggregated at the end nearest a very distinct transverse
suture.

25. S. scriipeiis n. sp. — Form moderately slender. Pubescence short,
sub recumbent, rath(>r sparse, bright fulvous on the abdomen, plumbeous on
the remainder of the dorsal surface. Head large and robust, twice as wide
as long; interocular surface slightly depressed, twice as wide as the eye;
longitudinal elevation much narrower than the lateral jiortions, strongly
and somewhat acutely convex, prominent, sulcations acute and prominent;
punctures small, rounded, very closely crowded toward the eyes, where they

44

NOUTII AMERICAN

:i4

1 '■

m ill

arc extremely coalcseont ; ocular linos meeting at one length in advance,
almost uniformly eurvate ; antennae V(!ry slightly longc'r than the width of
head, slender, ehih distinct, hasal joint black, remainder rather pale piceons-
lirown ; third joint one-half longer thnn the fourth, fourth and liftli sul)-
eqnal, sixth and seventh ocjual in length, the latter slightly more robust,
eighth nearly twice as long as wide, joints of club of nearly e(iual length,
last two almost equal ; maxillary palpi long and very slender, j)alo piceoiis-
brown, becoming i)ale piceo-testac(wiis toward tlie l)ase. Prothorax arcuately
and gradually increasing in width to the middle, where it is scarcely three-
fourths as wide as the head, as wid« as the elytra at base, and nearly one-
fifth narrower than long; sides thence moderately convergent posteriorly
and vi'ry strongly sinuate; anterior and posterior margins eijual ii\ length,
tlie former rather strongly arcuate, the latter nearly straight ; surface strongly
and longitudinally tul)erculate near the basal angles, and very feebly so near
tlut apical angles ; central portions of the pronotum nearly Hat ; punctures
rather fine, variform, extremely closely crowded near the base and ajiex
where; they are confused and coah^scent, occasionally isolated ncsar the
middle ; interspaces generally acute and polished ; canalicuhition beginning
sliglitly before the middle, one-third as long as the pronotum, narrow, well-
marked. Elytra at base much narrower than the heail ; sides strongly
diverg(!nt jiosteriorly, very slightly longer than the width at base, ratlier
feebly and eveidy arcuate ; together very broadly, roundly, and strongly
emarginate behind; suture distinctly shorter than the pronotum; surface
depressed, nearly Hat, very feebly impressed on the suture near the base,
deeply, rather coarsely, extremely closely punctate ; punctures very much
confused, interspaces acute. Abdominal segments uniforndy and very
gradually decreasing in width, first just perceptibly narrower than the con-
tiguous elytra ; surface rather coarsely punctulate, punctures vory close near
the borders, finer and more distant along the middle and also behind ; trans-
verse carinae tricuspid, middle cusps long and aciculate, lateral very short
and somewhat rudimentary. Legs long and slender, pale piceo-fuscous
above, paler piceous-brown beneath ; first joint of the posterior tarsi rather
more than twice as long as the second, and nearly one-half longer than the
last, second joint slightly longer thjvii the third, fourth much shorter.

Male. — Fourth ventral segment very feebly impressed throughout its middle
third, edge entire; fifth emarginate in its middle third at apex, emarginatiou
evenly rounded, six times as wide as deep, contiguous surface rathe:' strongly
and cylindrically impressed throughout anteriorly ; sixth segment triangu-
larly incised at the apex, incisure one-third as wide as the apex, very slightly
wider than deep, edges of notch rapidly thinned, so that it is bordered by a
narrow, concave surface; seventh segment transversely truncate at tip.

Female. — Sixth segment angularly produced and rounded behind.

Length 3.2-3.7 ram.

Grimsby, Ontario, 8 ; Maniuette, Lake Superior, 1.

A very distinct species in form, sculpture, and sexual modifications.

26. S« illtrilSUS n. sp. — Form moderately robust. Pubescence very short,
setiform, sparse, very flue and cinereous, becoming llavo-ciuereous toward

COLEOPTERA.

45

till' tip of the .abiloitii'ii. Head large, twico as wide aa long; iiiterocular
surfftct! very inodcratiOy oxcavatod, twicti as wide as tlio nyc, somewhat
coai'stdy, cldstdy, aixl evenly puiiL'tured ; punetiiri'S imiiressed, interspaces
IKilislied; e(|ually trilobcfd by the distinct longitudinal sulcations, between
wlii(di the surface is evenly convex ; ocular lines meeting at one length in
advance ; antennae very slender, longer than the width of head, first two
joints black, remainder piceoiis-brown, club slender; third joint one-third as
long again as the fourth, fourth and fifth ecjual in length, sixth and seventh
(■(luai, joints of cdui) increasing in length ; maxillary palpi very slender, first
joint jiale testaceous, next two darker testact^ous. Prothorax robust, widest
at the middle, where it is threci-fourths as wide as the head, and about as
wide as long ; sides thence moderately convergent posteriorly, and distinctly
sinuate ; anterior and posterior margins equal in length, the former slightly
the more arcuate; surface transversely impressed just behind the anterior
margin, and slightly tuborculate at the sides near the base ; somewhat finely
punctured, punctun-s rounded, impressed, and seldom coalescing, inter-
spaces one-half tiieir width, highly polished ; canaliculation in the foim of
a slight longituilinal impression, extending along the middle three-fifths,
and scarcely noticeable. Elytra at base as wide as the head ; sides very
moderatidy divergent posteriorly, but slightly longer than the width at base
and almost straight ; together broadly and somewhat feebly emarginate
posteriorly ; suture one-sixth as long again as the pronotum ; surfa(;e nearly
evenly convex, punctures rather coarse, deeply impressed, rounded, and but
seldom coalescing, intca'spaces one-half their wiiltli and highly polished.
Abdominal segments decreasing regularly and moderately in width poste-
riorly, first as wide as the contiguous elytra ; surface rather depressed, highly
l)olished, sparsely, very finely punctulate ; transverse carinae tricuspid,
middle cusps long and acicular, lateral short, exjianding at apex, and
inclined inward, intervals very moderately sinuate. Legs slender, dark
piceous ; tarsi paler, slender ; first joint of posterior twice as long as the
second, next three uniformly decreasing in length. Under surface of abdo-
men clothed with long, recumbent, fusco-flavate pubescence which is very
fine.

Male. — Posterior edge of the fifth ventral segment strongly emarginate in
its middle half, emargination evenly rounding, six times as wide as deep,
surface deeply impressed, sides of impression slightly convergent anteriorly,
and in the form of acute ridges which terminate posteriorly in acute teeth,
projecting over and beyond the emargination, fioor of impression fiat and
almost impunctate ; sixth segment very narrowly, deej)ly, and triangularly
incised, at apex, notch much deeper than wide, angle very acute, sides
straight ; seventh segment deeply emarginate at apex.

Female. — Sixth segment feebly bilobed at apex, cusp acute, arms widely
divergent.

Length 3.7-4.0 mm.

Cambridge, Massiicliusetts, 28 ; Wliite Fish Point, Michigan, 1 ;
Escanaba, Michigan, 1 ; Canada, 1.

A fine, well-marked species, with excellent sexual cliaracters. The

- Jl

46

NORTH AMKRICAN

moilificutioii of the sixth SL-gmtMit in tlie ruinale is not noticeable; in
some SfH-'ciinens.

27. H, crytlll'opilH 'S\t'\». — Fdiin inoileratoly rolinst. PulH'SCcnce ox-

t't;L'(liii;;ly slioi't ;iii(l spar.sc, tine, ^ctil'onii, and cincrcniis. Head robust, not
twice art wide as long ; intfi'ocular surface! twicu a.-i wide as tin? cy*', distinctly
excavated, rather coarsely, closely, and evenly innictate, interspaces one-
fonrtli as wide as tlie jiiinctnri's, shining ; (equally trilobed by the sharply
marked, longitudinal sulcations, intermediate surface evenly cons-ex ; ocular
lines meeting at one length in advance ; nnteiinai' long and very slender,
longer than width of heail, ilark piceeuis-brown, basal joint black, club
narrow ; third joint one-thir<l as long again as the fourth, fourth and lifth
equal, eighth longer than tin? ninth, joints of club slender, equal in length,
ninth and ♦enth clavate, last c(<nical ; maxillary palpi long and slender, pale
fusco-tcstac 'ous throughout. Prothorax very robust, wiclest at the middle,
where it is ihree-fourths as wide as the head, and slightly narrower than
long ; sides timnce very feebly convergent posteriorly, and distinctly sinuate ;
anterior ard jiosterior margins equal in length, the former much the more
arcuate; surface rather unevenly convex, very closely, somewhat coarsely
and unevenly punctate ; canaliculation somewhat obscure, narrow, but dis-
tinct, commencing at the middle and extending to within one-fourth the total
length of the posterior margin. Elytra at base much narrower than the
head, sides moderately divergent posteriorly and feidily arcuate; together
broadly and very feebly emarginate posteriorly; suture slightly longer than
the pronotum ; surface depressed, coarsely, deeply, and very unevenly
sculptured, on a small area near the inner basal artgles, the i)unctnres are
rounded and isolated, with the interspaces much wider than the punctures,
the remainder of the surface is very closely and deviously channeled, the
channels being generally short. Abdominal segments decreasing very gradu-
ally in width, first narrower than the contiguous elytra; surface convex,
coarsely and closely punctulate anteriorly, finely so posteriorly; transverse
carinae tricuspid, middle cusps slender and acicuiate, lateral rndinuMitary
and expanding at apex, intervals rather strongly sinuate;. Legs long and
slender, pale piceous-brown ; first joint of posterior tarsi more than twice as
long as the second, longer than the next three together, second distinctly
longer than the third.

Molt'. — Posterior edge of fifth ventral segment strongly emarginate in its
middle three-fifths, contiguous surface deeply impressed, floor of impression
flat, somcnvhat uneven, in)punctate ; sides nearly parallel, in the form of
acute, elevated ridges, which terminate posteriorly in two strong acute teeth
projecting over and beyond the emargination ; sixth segment narrowly emar-
ginate at the apex, notch much deeper than wide, rounded anteriorly, sides
nearly straight, surface unevenly and feebly impressed, and impunctate ; at
the anterior portion of the impunctate area, there is an elongated, narrow,
and very acute cariniform elevation, rising abruptly from the surface ; seventh
segment narrow, evenly emarginate at apex.

Female, — Sixth segment acutely rounded posteriorly and distinctly bilobed
• at the apex, cusp minute and rounded, arms widely divergent.

Length 4.0-4.8 mm.

COLEOPTKRA.

47

Ciinibridgc, Massju'liusetts, 7; Wliitc Firsli Point, INIicliifran, 1.
Tliis very fine species is, witli a few exceptions, tiie most distinct
in its sexual diameters of any in llie genus.

28. S. rilKifcr li. sp. (Fauvnl MS.). — Form robust. PiiLesfencH oxces-
sivc'ly sluirt, sub-i'rcct, ratlior (.'oarHc, siiar.sc, vi'ry jialc llavd-cincrcoiis. Head
small, iiil)iisi, scarcely tuico as widi- as long ; iutfrocular siii face iit-arly Hat,
sliglitly more than twice as wide as tli.s vyv, nearly ecjually trilobcd by the
(Ict'H, ac\itt'ly roundi'd siilcations ; intermediate surface stronjrly and evenly
convex ; juinctiires moderately coarse, deep, so closely crowded as to jiresent
simply an extremely rough surface, totally lustreless ; ocular lines meeting
atone length in advance; antennae^ very slightly longer than the width of
bead, robust, piceous-black, club distinct ; third joint one-half as long again
as the fourth, fourth and fifth e(jual, sixtli slightly longer and niucli less
robust than the seventh, eighth globular, as thick as the seventh, joints ten
and eleven nearly (^qual in lengtli, distinctly longer than tlie ninth ; maxil-
lary jialpi very long, piceous-black, clou<led slightly darker toward tlie tip.
Prothorax arcuately and evenly increasing in width to a point slightly bidiind
the middle, wliore it is very slightly narrower than the head, and nearly
one-sixth narrower than long ; sides thence nuxlerately convergent posteriorly
and strongly sinuate ; antc^rior margin rather strongly arcuate, posterior
straight ; surface longitudinally tuberculate along the tlanks of the pronotum,
jiarticularly near the basal angles, transvcirsely impressed imnu'diately be-
hind the anterior margin, longitudinally canaliculated through the middle
two-thirds, border of furrow sliglitly swollen, entire surface rather linely,
deeply, and excessively closely sculptured, rough, and lustrtless. Elytra
at base mnch wider than the head ; sides nearly parallel, slightly longer
than the width at base and very feebly arcuate, more so behind; together
broadly, roundly, and distinctly emarginate behind ; suture slightly more
than one-fourth as long again as the pronotum ; surface of each elytron
slightly swollen near the middle of the base, finely, excessively elosely,
and irregularly punctured and channeled, lustreless. Abdominal segnunits
decreasing uniformly and very gradually in width, first just percejjtibly
narrower than tlu; contiguous elytra; surface nearly lustreless ; jiunctures
extremely close, very coarse, polygonally compressed, slightly finer and
more isolated toward the tip ; transverse carinae tricuspid, middle cusps
long and acicular, lateral equal in length, broad, widening at tip, where
they are amalgamated with the general surface. Legs sbtnder, iiiceous-
black ; first joint of the posterior tarsi three-fourths as long again as the
second, anil equal in length to the last, second much longer than the third,
third and fourth sub-eciual.

Mdk. — Fourth ventral segment feebly flattened in the middle at apex ; fifth
segment emarginate in its middle third at ap»!X, emargination evcndy rounded,
twelve times as wide as deep, contiguous surface impressed through one-half
its length anteriorly, sides of impr(!SS(id area acutely ridged, coarsely setose,
and terminating posteriorly in well-markinl acute teeth, bottom of impression
nearly Hat and impunctate toward the emargination ; sixth segment triangu-

48

NOHTII AMKKICAN

larly iiiciHod at a\>ox, trinn^;lt' iMiuilatcral, Hiiylitly inon! than oiif-tliinl an
wide as thti Ht-gTiiciit,

Fiiiifilr, — Sixth scf^incnt iiarrowly inndiii'tMl and l)itii)M>d at tlin apex, ciiMj)
small, distinct, vtry fctdily rounded, ann.s narrowly divfrj^cnt and ratln-r
acHtwly rounded.

Length % 3.5, 9 4.2 mm.

Aliiniosii, Colonido, 2.

Eiisily riH;()<iMiz('(l by its very rongli, lustfeless surface, and v(M'y
distinct sexual clumictcrs.

l!l'

il-

ii'.l. S. aiiastolllOZan» n. sp. (Crotch MS.). — Form very moderately
robuHt. I'libesct^nce short, rather close, coarse, semi-enfct, cintTuous. Head
rather small, more than twice a.s wide as long; interocular surface nearly
tlat, two and one-half times as wide as the eye ; loiigitndinal (devation
slij,'htly narrower than tiie lateral jjortions, stron^dy and evenly convex ;
Bulcatiuns sonuiwhat deep and prondnent ; punctures coarse, rounded,
moderately close, evenly distrilmteil, and deeply impresseil, intersi)aces one-
half as wide as the punctures, feebly convex, and shininj; ; ocular lines
meetiaig at one length in advance ; antennae as long as the width of head,
rather slender, club large, basal joint black, remainder dark piceous-brown ;
third joint one-half as long again as the fourth, fourth sliglitly longer than
the lifth, sixth slightly longer and much less robust than the seventh, eighth
very robust, as wide as or slightly wider than the seventh, tenth joint slightly
the widest ; maxillary pali)i long an<l slender, dark piceous-brown, becoming
pale piceo-teslaceous at the base, fourth joint very distinct. Prothorax
almost uniformly and gradually increasing in width to the middh?, where it
is four-fdtlis as wide as the head, and distinctly narrower than long; sides
thence moderattdy conv(!rgent posteriorly and very feebly sinuate; anterior
and posterior margins equal in length, the former distinctly the more arcuate ;
surtace Hnely tuberculate along the sides near the canaliculation, and more
particularly near the basal angles ; rather finely, deeply, extremely clostdy,
and somewhat confusedly punctured, interspaces acute ; canaliculation short,
moderately deep, and narrow, commencing just before the middle, one-fourth
as long as the pronotum. Elytra at base as wide as or just perceptibly
wider than the head : sides very feebly divergent posteriorly, slightly longer
than the width at base, rather strongly and evenly arcuate ; together nar-
rowly and very strongly emarginate behind ; suture nearly one-third as long
again as the pronotum ; surtace very feebly and broadly impressed on the
suture at and near the base, somewhat coarsely, very deeply, extremely
closely punctate and channeled, interspaces acute. Abdominal segments
decreasing uniformly and rapidly in width, first distinctly narrower than
the contiguous (dytra ; surface rather strongly convex, extremely coarsely
and closely, sub-variolately punctulate ; punctures rounded and not coales-
cent, much finer and more distant behind; transverse carinae tricuspid,
cusps very long, stout, aciculate at tips, prominent, lateral slightly shorter
than the middle ones. Legs rather long and slenier, femora black, tibiae
and tarsi pioeous-black beneath ; first joint of posterior tarsi three-fourths as

. V V

' I -,,

COI.KOl'TEHA.

49

thinl as*

ex, cnsi>
.1 rathi-r

11(1 very

odcratcly
iH. Head
ce nearly
i^leviition
' convex ;
I'ouiideil,
liU'Crt one-
ular liiifs
li of lu-ad,
US-brown ;
)ngt'r than
ilh, ei^'hth
nt slightly
, hi'i.'oniing
Prothorax
(•, where it
ong ; sides
> ; anterior
I'e arcuate ;
, and more
jly closely,
Uion short,
line-fourth
l)erceptibly
htly longer
Tether nar-
lird as long
;sed on the
extremely
il segments
rower than
ily coarsely
not coales-
8 tricuspid,
htly shorter
)lack, tibiae
le-fourths as

long again an tlio 8t*cnnd, anil very slightly Hliortor than the last, Hwond
distinctly longer than the third, third and fourth suli-ecjual in length.

Mnli. — Fourth ventral segment having a small, triangular, impunctate
spot at the middle of the apex ; fifth segment emarginate in its middle three-
flftliH at apex, emargination evenly nniuded, and eight to ten times as wido
as deep, contiguous surface impressiMl nearly throughout anteriorly, >.i<les of
impression slightly convergent, acutely ridged, and furnished with very
long, coarse setae, bottom of impressed sni'face impunctate; sixth segment
triangularly incised at apex, inc-isiou one-third as wide as the segmental
apex, as wide as deep ; seventh segnu'Ut deej)ly and roundly emarginate at
tip, teeth distinct, lateral setae very long.

/•(■;;»(/('. — Sixth segment hilobed at apex, cusp minute and very broadly
rounded.

Length 3. 7-;}. 8 mm.

Hermit Lake, Mount Wasliington, N. II., 1 %,; Mount "Wasliing-
ton, N. II. (valleys), 1 ?.

This fine species greatly resenibles rugifer, but diflfers in its more
slender form, and especially in its miicli more slender abdomen. It
also ditlers markedly in tlie nature of tlie punctuation of tlie liead
and abdomen. In tlie ty[)e specimen the fourth joint of tiie maxillary
palpi is plainly visible, ai)pearing as a stiff and regularly ta|)ering
spine, protruding from the apex of the third joint. The small im-
punctate triangle of the fourth ventral segment may possibly be
abnornuil.

30. S. slioslioilis n. sp. — Form moderately robust, sides parallel.
Pubescence mod'-rate in length, rather sparse, semi-erect, fine, setiform,
jiale fulvo-piceous. Head moderate, very robust, not twice as wide as long ;
interocular surface slightly more tliau twice as wido as the eyct, flat, equally
trilobed by the very deep, rounded sulcations ; intermediate surface evenly,
broadly, and strongly convex ; punctures fine, rounded, very close, and often
coalesceiit. Interspaces nearly opaque ; ocular lines meeting at less than one
length in advance; antennae as long as the width of head, slender, dark
piceous-brown, club distinct ; third joint one-third as long again as the
fourtli, fourth and fifth equal, sixth very slightly longer than the seventh,
eightli twice as long as wide, seventh and eighth just perceptibly more
robust than the sixth, joints of club increasing gradually in length and
breadth : labial pal})! very robust, piceous-black, basal joint pale piceo-testa-
ceous ; nientum bearing several very long setae. Prothorax very robust,
widest slightly in advance of the middle, where it is just perceptibly nar-
rower than the head, very slightly broader than long, and as wide as the
elytra at base ; sides thence rather rapidly convergent posteriorly and very
feebly sinuate ; anterior margin slightly longer and more arcuate than the
posterior ; surface feebly impressed along the flanks of the pronotum, and
transversely and rather strongly impressed just behind the anterior margin ;
very closely, finely, and deeply punctured ; Canaliculation rather deeply ex-
Stbnini. 4

60

NORTH AMKUICAN

M

cavftted, t'xtt^iuling with nearly equal nicltli to within very xliort (li.staiioeH
of till- l)(iMc anil apex, liottimi inipiinclatc. Elytra at base very slightly
narrower than tlie head ; Hiilex very Htr(inj,ly divergent ])o»teriorly, very
HligUtly longer tlian the width nt bast), rather strongly and evenly nrcnato ;
together very broadly, evenly, and Htrongly eniarginate behind ; siitiiro
slightly rtborter than the jironotiini ; surface dejiresseil, even ; very dee|p|y,
rather llnely, very uloHely and unevenly punctate and ehanneled, interspaees
very narrow, eonvex, and shining. First two abdominal segments eiiu.'il in
width, slightly wider than the contiguous elytra ; surlace broadly and rather
feebly convex ; coarsely, closely, nn<l rather feebly puiictulate ; transverse
carinao tricuspid, nudiUe cuhjjs very strong, finely acuminate at tip, lateral
large, dilfused, and exceeilingly indefinite, Legs moderate, piceous-black
above, dark rufo-piceou beneath ; first joint of posterior tarsi one-half as
long again as the second.

Milk; — Unknown.

FiiiKili-. — Sixth ventral segment angularly produced at apex, vertex very
fe(d)ly rounded.

Length 3.G mm.

Tliurston County, "NVasliington Territory, 1.

The robust prothorax unil short elytra will readily distinnjiiisli this
very well-marked species. The maxillary \)ii\\n are lacking in the
type specimen.

•m

31. S. ilisillaris n. sp. — Form slender. I'nbescpnce rather long, fine,
and somewhat sparse, recumbent, rather pale fusco-cinereous. Head large,
more than twice as wide aa long ; interocular surface nearly twice aa wide as
the eye, rather strongly depresstMl ; longitudinal elevatiim narrower than
the lateral portions, evenly and very strongly ''onvex, very prominent ;
punctures fine, close, and even at the sides, very minute and sparse in the
middle; ocular lines meeting at one length in advance; antennae slightly
longer than the width of head, slender, piceous-brown, growing slightly
paler toward tip, club rather small ; third joint one-fourth as long again as
the fourth, fourth slightly longer than the fifth, seventh slightly shorter and
more robust than the sixth, eighth rval, joints of club increasing very gradu-
ally in length and thickness ; m palpi long, first joint pale testa-
ceous, second darker, rufo-test.*' d very long, dark piceous-brown.
Prothorax widest distinctly middle, where it is three-fourths i'.s
wide aa the head and just ly narrower than long ; sides thence very
slightly convergent postei. ./id rather strongly sinuate; anterior margin
slightly shorter and much more arcuate than the posterior ; surface rather
strongly tuberculate at the aides .near the base, finely and irregularly
punctate; tumctures very feeble, isolated in the middle, crowded toward the
margins, uiterspaces flat and highly polished ; canaliculation short, oval,
deeply impressed, beginning slightly before the middle, scarcely more than
one-fourtli as long aa the pronotum. Elytra at base slightly narrower than
the head ; sides moderately or somewhat strongly divergent posteriorly, very
slightly longer than the width at base, feebly arcuate ; together just percep-

COI.EOl'TFHA.

Ol

tilily mill riMimlly ctnnrKniatc Im-ImikI ; r^iitiirt- aliniit (•(pml in liMij,'tli to tlie
jiroiidtimi ; siii I'lU'c iiitlnT (IcpivsMcil, i-iu-li liiivinn a «lij,'lit t'lcviitioii lit tin*
luiililli'of itH liiiHi' ; cdiirHcly, siil(-v;ii'i(il;iti'ly, closcl/, iind vcvy iri<'j;iiliii'ly
|iiiiii;tiirf<l iind cliiiiiiK'li'il. Abdominal Hi'f,'ui''MtH tl(■^•|•<■ll^:^nJ; iiiiit'oriiily iiinl
Very fjrftdiially in wiiitli, first alHxit ax wiiii- as tlic coiitiKiious elytra ; siirlacn
nmilcrati'ly convex, Ihiely nnil feelily pnix-tiilate ; transversie earinae iini-
eus|ii<l, cusp long ami acioulate. Lege rather long and slender, t'uscoiis,
under sides of femora rufous ; llrst joint Oi" posterior tftral very short, one-
halt' as ioiif^ af,'aiu as tiie second, one-lnilf as lonj^ as tin- last ; joints Inn to
four uniformly and gradually decreasing in length, together not as long as
the Ofih. Uody winged.

Mtilr, — Fourth ventral segment slightly flattened in its middle three-fltths,
more strongly so hehind, edge scarcely niodilii'd ; lifth segment deeply eniai-
ginato in its middle throe-llfths at ajiex, emargination very eveidy rounded,
from six to seven times as wide as deep, contiguous surface rather strongly
and cylindrically impressed throughout anteriorly, the borders of all tliH
impressed and llattc-nt^il surfaces being hoi'dered with long, recumlient, pice-
ous setae; sixth segment narrowly sinuate at ajiex, sinus one-half as wide
as the apices, nearly as deej) as wide, acutely rounded at the bottom, sides
nearly straight, exterior angles rather acute.

Female. — Sixth segment broadly and very evenly rounde<l behind.

Length 4.0-4.2 mm.

Vancouver Island, British Columbia, 5.

Hesenibles at first sight a diniinutivo inarttimns, but is quite dis-
tinct, as may be interred Irom the descriptions.

32. 8> vexatlis n. sp. — Form moderattdy slender. Pubescence mod«'.
rat(dy long, semi-erect, somewhat close, pale picieoiis anteriorly, llavate on the
abdomen. Head rather large, twice as wide as long; interocular surface
slightly more than twic'e as wide as the eye, moderately depressed, finely and
somewhat irregularly punctured, interspaces in some spots as wide as or
wider than the punctures, flat, and shining; equally trilobed by the very
deep and conspicuous snlcations ; intermediate surface strongly and evenly
convex ; ocular lines nictating at two lengths in a<lvance ; anttmnae piceoiis-
black, very slightly longer than the width of head, slender, club not con-
spicuous ; third joint scarcely one-flfth as long .again as the fourth, joints
four to six uniformly decreasing in length, sixth and seventh eij^ual in
length, the latter thicker, eighth elongated, as wide as the seventh, joints of
club increasing in length, the last two equal in thickness and stouter than
the nii\th ; first joint of maxillary palpi and base of the second translucent,
pale testaceous, remainder piceous-black. Prothorax widest a little before
the middle, where it is four-fifths as wide as the head, and about as wide as
long ; sides thence moderately convergent posteriorly and slightly sinuate ;
anterior margin slightly shorter and much more arcuate than the posterior :
surface distinctly bi-tuberculate at the sides, very irregularly and rather
finely punctate; ^amctures in the middle very small and distant, crowded
and larger at the ends ; canaliculation very conspicuous, short, narrowly

"W

52

NORTH AMEKICAN

::;!,

4

oval, very dtjeply impressed, beginning slightly before the middle, two-fiftlis
as lon<; a^^ the pronotiun. Elytra at ba»i' diHtinctly narrower than the head ;
sides rather Htrongly divergent })osteri(>rly and very feebly areuate, slightly
longer than the width at base; together broadly and feebly eniarginate be-
hind ; Huture equal in length to the pvonotuni ; snrfaee depressed, coarsely,
deeply, and very irregularly punctured and channeled. Abdominal segments
decreasing uniformly and extremely gradually in width, first slightly wider
than tiio contiguous elytra; surface rather depressed, very finely, closely,
and evenly panctulate ; transverse carinae tricuspid, middle cusps very
long, becoming aciculate toward the tips, lateral very short and rudimen-
tary, intervals distinctly sinuate. Legs short, dark rnfoj)iceou,s, tarsi
black ; lirst joint of posterior tarsi twice as long as the S'-cond, and as long
as or longer than the last, second slightly longer than the third, lifth joint
widest. Under surface of abdomen clothed w' ^ong, recumbent, cinereous
pubescence.

J/ri/f. — Unknown.

Female. — Sixth ve>-tral segment very evenly rounded behind.

Length 3.1 mm.

Thurston County, Washington Territory, 1.

Upon the above type of this very well-marked species may be seen
nine large parasites, each nearly as long as the first three antenna!
joints, very convex, polished, and witli ovfil outline ; tliey are of a
pale ferruginous tint, and appear to be comparatively highly organized.

i m]

H

33. S. Scllivarzi n. sp. (Fanvel MS.). — Form rather slender. Pubes-
cence sliort, fine, sparse, semi-erect, Havo-cinereoua, not conspicuous. Head
moderate, robust, scarcely twice as wide as long ; eyes large, very convex ;
interocu.ar surface very moderately excavated, scarcely twice as wide as the
eye, finely, sub-variolately, and irregularly punctate ; jiunctrres rather dis-
tant bi'liind, coalescent anteriorly ; longitudinal elevation scarcely more than
one-half as wide as the lateral portions, rather acutely and strongly convex ;
ocular lines meeting at one length in advance ; antennae long, slender, much
longer than the width of head, basal joint black, remainder dark piceous-
brown, club moderate; third joint one-fourth as long again as the fourth,
fourth and fifth nearly equal, sixth and seventh sub-equal in length, the
latter very slightly thicker, eighth elongated, oval, not as long as the ninth,
joints of club v( nearly equal length ; maxillary palpi pale piceous-brown,
growing Y>a.U'r toward the base, third joint nearly as long as the first and
second together. Prothorax widest just before the middle, where it is three-
fourths as wide as the head, and nearly as wide as long: sides thence very
moderately convergent posteriorly and nearly straight ; anterior margin very
slightly longer and more arcuate than the posterior ; surface rather strongly
tuberculate on the sides at the base, feebly and transversely impressed
just behind the anterior margin, finely and irregularly punctate; punctures
widely separated near the middle, crowded toward the margins, interspaces
feebly convex, minutely reticulated ; canaliculation strong, deenly impressed,
oval, beginning distinctly before the middle, nearly one-half as long as the

COLEOPTERA.

53

m.

proHotiim. Elytra at V/ase very slightly narrower than the head ; sides
rather I'oebly divergent posteriorly, just perceptibly longer than th<f width
at hi .!e, feebly arcuate; together broadly and somewhat feebly emarginate
behind; suture as long as the pronotuin, surface somewhat unev(;n, rather
finely and very irrei^ularly punctured; punctures isolated toward the suture
and the base, coalescunt elsewhere, especially near the inner apical angles,
toward which the channels are generally more or less convergent. Abdo-
minal segments decreasing uniformly and very gradually in width, first
somewhat narr<.wer thau the contiguous elytra; surface finely punctulate ;
transverse cnrniae tricuspid, cusps distant, middh? ones long and finely aci-
culate, lateral shorter, aciculate, inclined inward. Legs moderate, f'us(^ous,
except the under sides of the fetnora, which are rufous ; tarsi slender ; first
joint of posterior twice as long as the second and slightly longer than the
fifth, second and third nearly eijual.

Mule, — Under surface of third ventral segment slightly flattened in its
middle third, i^dge scarcely modified ; fourth segment just p<^rceptibly emar-
ginate in its middle three-fifths at apex, emarginatiou evenly rounded, (con-
tiguous surface feebly and conieallj' iujpressed throughout anteriorly ; fifth
deeply emarginate in its middle third at apex, emarginatiou very evenly
rounded, six times as wide as deep, contiguous surface strongly and conically
imj>ressed throughout anteriorly, sides of impression distinct and feebly con-
vergent ; sixth segment strongly, narrowly, and deeply sinuate at ape*,
almost triangularly incised, incisure acutely rounded at the bottom, sides
nearly straight, deeper tlian wide ; seventli segment broadly and fei-bly
emarginate at apex, emarginatiou transverse at bottom, teetli short and
setigerous.

Feiiuile. — Sixth segment evenly rounded behind throughout.

Length 2.8-3.0 mm.

Cambridge, Massacluisetts, 8.

Tlie convergence of the punctnlar channels toward the inner apical
angles of t'le elyti-a is also mentioned as a peculiarity of miUtaris of
the Lake Superior region.

34. S. pauper n. sp. — Form slender. Pubescence very fine, short,
sparse, sub-recumbent, pale tiavo-cinereous. Head rather largo and robust,
twice as wide as long ; interocular surface slightly depressed, more than
twice as wide as the eye, equally trilobed by the very prominent sulcations ;
intermediate surfuee evenly and strongly convex, punctures round, rather
small, evenly distributed, distant by more than their own widths, inter-
spaces flat, I'.ighly polished ; ocular lines meeting at less tlian one length in
advance, lines of juncture strongly curved near the front; antennae slender,
much longer than the width of head, first joint black, remainder piceous-
brown, club moderate; third joint two-fifths a' long again as the fourth,
fourth and fifth equal, sixth distinctly longer and more slender than the
seventh, eighth sub-globular, joints of club increasing in length ; maxillary
l>alpi moderate, first joint pale testaceous, remainder dark piceo-testaceous.
Protborax widest just before the middle, where it is four-fifths as wide as

m

m

m
■ '"It

»^'

tm

54:

NORTH AMEUICAN

the hcrtil, and very slightly narrower than long ; sides thence moderately
convergent anteriorly and posteriorly, and nearly straight ; anterior and
posterior margins suh-oqnal in length and curvature; surface very faintly
tuherculate on tin* sides at tht; liase, liiiely and distantly punctured, i)unc-
tur(!s somewhat irregular in outline, and slightly narrower than the inter-
spaces in the middle, the latter Hat <ind )ninutely reticulated ; canaliculation
hroadly oval and deeply impressed, conspicuous, hegiuiiing slightly before the
middle, one-half as long {»s the pronotum. Elytra at biise distinctly narrower
than the head; sides rather ■rtrongly divergent posteriorly, very slightly
longer than the width at hase, almost straight, together broadly, roundly,
and distinctly emarginate behind ; suture about equal in length to the pro-
notum ; surface depressed, very feebly impressed along tiie suture toward
the base, rather coarsely, closely, and evciily ])unctate ; punctures feebly
imi)ressed, more than twice as wide as th.' intersj)aces, which are flattened
and somewhat wider near the inner basal angles. Abdominal segments
decreasing .. juately in width, and with extreme slowness, first somewhat
wider than the contiguous elytra ; surface broadly convex, very irregularly
jiunctulate, punctures very coarse at the bases, much finer and more sparse
at the apices ; transverse carinae tricuspid, middle cusps long, aciculate,
and prominent, lateral very short, rounded at ti]>, broad, and rudimentary.
Legs short and slender, fuscous above, femora rufous beneath ; first joint
of the posterior tarsi one-third as long again as the second, and somewhat
shorter than the last, joints two to foar uniformly and rather rapidly decreas-
ing ill length.

MiiIp. — Unknown.

Fmiiilf. — Sixth ventral segment evenly rounded behind, broad.

Length 2.1 mm.

Cambridge, Massacliiisetts, 1.

Tlie protliorax somewliat resembl<;s that of mendax in the nature

of the sides.

3."). S. silbtilis n. sp. — Form slender. Pubescence rather sliort and
sparse, lliu;, sub-recumbent, setiform, cinereous. Head rather large, twice
as wi<le as long ; interocular surface tlat, twice as wide as the eye, equally
trilobed by the faint sulcatious ; intermediate surface feebly and evenly con-
vex ; punctuation line, even, and rather sparse ; ocular Hues meeting at one
length in advance ; antennae scarcely longer than the width of head, rather
robust, club moderate, basal joint black, remainder dark piceous-brown,
growing slightly paler toward tip; third, fourth, and fifth joints uniformly
decreasing in length, sixth longer and much narrower than the seventh,
eighth wider than the seventh, globular, joints of club increasing slightly in
length ; maxillary palpi moderate, first and second joints dark testaceous,
first slightly the paler, third joint piceous-black, and densely setigerous.
Prothorax widest slightly in advance of the middle, where it is three-fourths
as wide as the ht^ad and <listiiictly narrower than long; sides thence moder-
ately convergent posteriorly and feebly sinuate; anterior margin very slightly
shorter and much more arcuate than the posterior; surface nearly evenly
convex, rather coarsely, moderately closely, and very evenly punctate, inter-

COLEOPTERA.

6b

spaces one-half as widt; as the punctures ; canaliculation distinot, imprpssed,
liottom highly polisluid, sides soniewliat ind(ilinitely outlined, beginning
slif;litly Ix^fore the middle, one-half as long aa the pronoti;m. Elytra at
base just perceptibly narrower than the head; sides very feebly divergent
posteriorly, distinctly longer than the width at base, very feebly arcuate ;
toirether somewhat angularly and distinctly emarginate behind ; suture
about as long as the pronotum ; surface convex, nearly even, finely, moder--
ately closely, and V(fry evenly punctate ; punctures of different sizes and
sliajies, interspaces generally as wide as the punctures, feebly convex, and
very highly polished. Abdominal segments decreasing uniformly and just
perceptibly in widtli, first as wide ab the contiguous elytra; surface ratlier
finely, sparsely, and very evenly punctulato, highly polislied and rather
convex ; transverse carinae tricuspid, middle ousps moderate in length and
finely aciculate, lateral broad, roundt^d at tips, and rather rudimentary.
Legs somewhat long and slender, blackish-fuscous above, reddish-fuscous
beneath, tibiae distinctly curvate, especially toward tips ; first jointof poste-
rior tarsi one-half as long again as tlie second, and nearly as long as the last,
joints two to four uniformly decreasing in length.

Male. — Posterior edge of fifth ventral segment eniarginate in its middle
fourth, emargination evenly rounded, about ten times as wide as deep, with
the angles slightly rounded, contiguous surface feebly flattened throughout
anteriorly ; sixth segment sinuate at apex, sinus and vertices equal in curva-
ture, sinus about two and one-half times as wide as deep.

F' iiinlc. — Unknown.

Length 2.3 mm.

Detroit, Michigan, 1.

M

the nature

3(i. S. indigent n. sp. — Form rather slender. Pubescence short, moder-
ately sparse, semi-erect, flavo-cinereous. Head robust, not twice as wide as
long ; interocular surface very slightly depressed, twice as wide as the eye,
c .sely and evenly punctate, a small spot on each side near the base inipunc-
tate ; longitudinal ehivation very mu(di narrower than the lateral portions,
very acutely convex, prominent, summit narrowly impunctate ; ocular lines
meeting at one length in advance ; antennae dark piceous-brown ; third joint
one-third as long again as tlu; fourth, maxillary palpi long, first joint pale
testaceous, second darker, third robust, piceous, densely setigerous, and
nearly as long as the first two together. Prothorax widest slightly behind
the middle, where it is nearly four-fifths as wide as the head and distinctly
narrower than long ; sides thence rather strongly convergent posteriorly and
nearly straight; anterior and posterior margins sub-equal in length, the
former the more arcuate ; surface distinctly and obliquely tuberculate on
each siib* near the base, closely, rather finely, and somewhat confusedly
punctate ; canaliculation in the form of an elongated erosion, very indistinct.
Elytra at base distinctly narrower than the head; sides ratln^r strongly
divergent posteriorly, equal in length to width of base, and very feebly
arcuate ; together broadly, roundly, and somewhat strongly emarginate
behirid ; suture scarcely more than seven-eighths as long as the pronotum
surface depressed, very feebly impressed on and near the suture at base

56

NORTH AMEUICAN

III!

ratlier finely and very irregularly punctured ; near tlio inn»!r Lasal angles
the punctures are widely isolated, the interspaces tiat and highly jiolisht'd,
elsewhere, and esiiecially toward the inner apical angles, they ar(^ closely
compressed, often coalescent and somewhat larger. Abdominal si'gnients
decreasing extremely gradually in width, first two as wide as the contiguous
elytra ; surface feebly and evenly' convex, coarsely, closely, and evenly
puiictulate, the punctures becoming nuich liner and feebler toward the tip ;
transvers'.^ carinae tricuspid, cusps distant, middle ones short and linely
aeiculate, liitiU-al nearly a3 long, but very wide, rounded at tips. Legs
fuscous, rather long and slender; first joint of posterior tarsi two-thirds as
long again as the second, and as long as the last, joints two to four uniformly
and rather rapidly decreasing in length.

Male. — Posterior edge of fifth ventral segment just perceptibly eniarginate
in its middle third, emargination evenly rounded, and excessively feel)le,
contiguous surface feebly flattened throughout anteriorly ; sixth segment
broadly sinuate at apex, sinus feeble, evenly rounded, five to six times as
wide as deep ; seventh segment transversely and feebly eniarginate at apex,
teeth very short.

Female, — Unknown.

Length 2.5 nmi.

AViiverly, Massacliusetts, 1; Cambritlge, Massachusetts, 1.

The antennae are missing. Tiiis species, althougli resembling
placidus very cloi-ely, is, I think, distinct, because of the differences
to be observed in the structure of tlie {)al[»i and elytra.

37. S. siniplex n. sp. (Crotch MS.). — Form moderately robust. I'ubes-
cence exceedingly short, sparse, and fine, setiform, cinereous. Head rather
large, scarcely twice as wide as long ; interocular surface nearly Hat, slightly
more than twice as wiile as the eye, equally trilobed by the sulcatioiis which
are scarcely visible ; closely, rather coarsely and evenly punctate ; ocular
lines meeting at one and one-half lengths in advance ; antennae moderately
slender, as long as the width of head, basal joint black, remainder piceous-
brown, club large and prominent ; third joint one-third as long again as the
fourth, fourth and fifth equal, sixth and seventh equal and shorter, seventh
thicker than the sixth, eighth short and thicker than the seventh, joints of
club increasing in hmgth, last joint elongated, acuminate at tip ; first joint
of maxillary palpi and base of the second fiavo-testaceous, remainder pale
piceous-brown. Prothorax widest before the middle, where it is four-fifths
as Avide as the head, and slightly narrower than long ; sides thenci! rather
feebly convergent posteriorly and strongly sinuate ; anterior margin shorter
and more arcuate than the posterior, the latter nearly transverse ; surface
feebly and transversely impressed just behind the anterior margin, and
faintly tuberculate at each side near the base ; rather finely, variolately,
closely, and somewhat irregularly punctured, interspaces very narrow, flat,
shining, and minutely reticulated ; canaliculation irregular, shallow, begin-
ning before the middle, and extending to within one-fourth the hingth from
the posterior margin. Elytra at base very slightly narrower than the head,

m

coleoptp:ra.

57

sides feebly divt^rgent posteriorly and feebly arcuate, somewliat longer than
the widtli at base ; together broadly and riitlier feebly eniarginate jwisteriorly ;
suture one-llftli as long again an the i)ron()tuni ; surface feebly impressed
at the base on the suture, co.arsely, closely, variolately, and irregularly
punctured ; punctures coaloscent longitudinally, interspaces flat, shining,
generally very narrow. Abdominal segments uniformly and rather rapidly
decreasing in widtli, first very slightly narrower than the contiguous elytra;
border prominent ; siirface coarsely and feebly punctulate anteriorly ; very
finely punctulate posteriorly ; transverse carinae tricuspid, middle cusps
long, well developed, and aciculafe, lateral very rudimentary, intervals
feebly sinuate. Legs moderate, jiiceous-brown throughout ; first joint of
the posterior tarsi slightly more than twice as long as the second, as long
as the next three together, second slightly longer than the third. Under
surface of abdomen piceous-black, paler toward the vertex.

Afiilc. — Posterior edge of the fifth ventral segment feebly eniarginate in its
middle third, emargination evenly rounded throughout, twelve times as wide
as deep, contiguous surface very feebly and cylindrically impressed through-
out anteriorly, borders of the impression densely ciliate ; sixth segment
sinuate at apex, sinus slightly more acutely rounded than the apices, twice
as wide as deep, surface of segment not impressed ; seventh segment broadly
and evenly eniarginate at apex, emargination densely fringed with -hort,
cinereous setae.

Fvmiile, — unknown.

Length 3.0 mm.

Oregon, 1.

I have retained the manuscript name attached by Mr. Crotch to
the unique specimen.

38. S. TicinilS n. sp. — Form rather slender. Pubescence extremely
sparse, sliort, and line, setiform, cinereous. Head moderate, slightly more
than twice as wide as long ; interocular surface very feebly depressed, two
and one-third times as wide as the eye ; punctures not coalescent, line, very
closely crowded near the eyes, coarser and more distant along the middle ;
longitudinal elevation scarcely more tlian one-half as wide as the lateral
jiortions, rather strongly but evenly convex ; ocular lines meeting at two
lengths in advance ; antennae very slightly longer than the width of bead,
robust, club moderate, basal joint black, remainder dark piceous-broivii ;
third joint one-fourth as long again as the fourth, fourth and fifth ecjual,
sixtli and seventh equal in length, the latter tliicker, eighth slightly elon-
gated, as wide as the seventh, joints of club increasing in length, last two of
ecjual thickness, last joint conoidal ; first joint of maxillary palpi pale ttista-
ceous, second and third slightly darker, piceous. Prothorax widest at the
middle, where it is perceptibly narrower than long ; sides thence moderately
convergent posteriorly and nearly straight ; anterior margin slightly longer
and more arcuate than the posterior ; surface m-arly evenly convex, rather
finely, closely, variolately, and irregularly punctured, punctures not coales-
cent ; canaliculation very narrow, shallow, irregularly outlined, beginning
slightly before the middle and equal iu length to one-half the pronotum.

08

NOUTII AMKRICAN

Elytra at baso aliout equal in width to the head ; siilcs nearly j>arall('l,
slifihtly arunate, longer than the widtli at base; together broadly, very
evenly, and feebly eniarginate posteriorly ; suture one-fifth as long airain as
the pronotuni ; surfauo broadly convex, broadly and feebly inij)ressed about
the suture at the base ; ratheY llnely, deeply, and soniiswhat irregularly
punctate, punctures seldom coalescing, exceiit at a small spot near the centre
of each elytron. Abdominal segments decreasing vory uniforndy and ([uite
rajiidly in width, lirst somewhat narrower fliaii tlie contigncuis elyti'a; sur-
face conv<(x, finely, and closely punctulato ; transverse carinae tricuspid,
cusps quite approximattf, middle short, aciculate at tip, lateral broad, ex-
panding at tip, intervals strongly sinuate. Legs rather long and slender,
pale piceous and rufo-pieeous ; lirst joint of posterior tarsi twice as long as
the second, joints two to four very narrow at base, decreasing uniformly in
length, fifth very narrow at base.

Mule. — Posterior edge of tin* fifth ventr.al segment einarginate in its middle
third, emargination evenly rounded, very feeble, twelve times as wide as
deep; sixth segmcuit sinuate at apex, sinus and vertices eijual in width and
curvature, sinus but slightly widt^r tlian deep ; seventh broadly and feebly
emarginate at the vertex.

FnmiJc. — Sixth segment rounded behind.

Leiigtli 13.0 unu.

District of Columbia, 1 ; Pennsylvania, 20; Selma, Alabama, 1.

A very common species, abounding on tiie shores of Delaware Bay
below riiiladelphia ; it also occurs under debris on the beach at Cape
May, N. J.

30. S. ingratllS n. sp. — Form rather slender. Pubescence moderately
short, sub-recumbent, coarse, rather close, pale fulvo-cinereous, sonunvliat
conspicuous. Head moderate or small, twice as wide as long ; interocular
surface nearly Hat, rather more tlian twice as wide as the eye, e(]ually tri-
lobed by th<^ very wide an<l gently rounded sulcations ; intermediate surface
evenly and feebly convex, punctures small, rounded, rather close, very (evenly
distributed; ocular lines meeting at two lengths in advance ; antennae short,
scarcely as long as the width of head, dark piceous-brown, basal joint black-
ish, somewhat robust, club moderate; joints tbrei^ to six nearly uniformly
and (juite rai)idly decreasing in length, sixth sligiitly h)nger and much more
slender than the seventh, eighth slightly narrower than the seventh, globu-
lar, middle joint of club much the thickest ; maxillary jialpi moderat(s dark
piceous-brown, basal joint rather pale piceo-testaceoiis. Prothorax arcuately,
evenly, and rather rapidly widening to the middle, where it is four-fifths aj
wide as the head and distinctly narrower than long; sides thenc(* rather
rapidly convergent and sinuate ; anterior margin just perceptibly longer and
more arcuate than the posterior ; surface rather finely, feebly, distantly, and
evenly punctate; pun 'ures round, separated by their own widths, inter-
spaces nearly flat, polished ; canaliculation oblong, bi^ginning very slightly
before the middle, equal in length to two-fifths that of the pronotum, feebl^',
and roundly impressed. Elytra at base equal in width to the head ; sides
strongly divergent posteriorly, longer than the width at base, straight for a

COLEOPTERA.

59

sliort (list.iiico anteriorly, then rather stron),My arcuate hehiii<l ; tofjcthor
brt>a(lly, roundly, and rather strongly eniarginate behind ; suture scarcely
one-eighth as long again as the ])ronotuin ; surface I'ather ileprt^ssed, nearly
even, rather coarsely, fee))ly, and evenly purictate ; punctures round, not
.seimrated hy their own widths, occasionally partially coalescent in twos, but
not completely so ; interspaces feebly convex . . shining. Abdominal seg-
ments decreasing nearly uniformly and gradually in width, first as wide as
the contiguous elytra ; surface highly polished, rather coarsely, closely, and
evenly pinictulate ; transverse carinae tricuspid, niiddli- cusps strong, be-
coming finely acicular toward the tips, lateral much shorter and somewhat
rudimentary; cus])S widely st!i)arated. Legs slioi't and slentK'r, dark )iice-
(Uis-liidwn, iH^arly black above ; first joint of posterior tarsi tv.ici' as long as
the second, shorter than the iifth, joints tw(j, three, and four \-i.'vy short,
sub-eipial.

Mtilc. — Unknown. *

J-'imalc. — Sixth ventral segment rather elongated, very evenly, though
rather narrowly, rounded behind.
Length 2.8-3.1 nun.

Detroit, ]Micliigan, 1.

Ivcsoinbles parullehis somewhat ; the punctuation, however, is
miK'li liner and of a diHercnt cliaraeter. It may prove (litriciilt, in
sonic sjiecimens, to determine to wiiicii group it belongs, owing to the
punctures being almost entirely isolatiid.

4l'. S. IieglectllS n. sp. — Form rather slender. Pubescence so sparse
and fiije as to he scarcely visible on the head, prothorax, and elytra, longer
(ui the abdomen, where it increases in length toward the tip, and becomes
recumbent, cinereous. Head moderate, twice as wide as long ; interocular
surface feebly excavated, twice as wide as the eye ; coarsely, somewhat
evenly punctured, interspaces one-half as wide as the punctures, polished;
equally trilobed by the very distinct sulcations ; intermediate elevation con-
vex ; antennae much longer than tiie width of head, very shMider, first two
joints black, remainder piceous-black, club very slender ; third joint one-
third as long again as the fourth, joints four to six uniformly decreasing in
length, eighth very small, elongated, joints of club increasing in length, last
two of e(iual thickness ; maxillary i)alpi translucent, lirst joint rufo-testa-
ceous, second darker, third almost black. Prothorax similar to that of S.
iutnisus. Elytra at base as wide as the head ; sides divergent posteriorly
and arcuate, more strongly so posteriorly ; together broadly and somewhat
strongly eniarginate posteriorly; suture just percei)tibly longer than the
pronotum ; surface somewhat impressed on the suture at the base ; very
coarsely, deeply, and irregularly sculptureil ; j)unctures occasionally isolated
and rounded, at other spots joined into tortuous channels, interspaces at
some points in the form of acute ridges, at otliers as broad as the channels,
very convex and polished, exhibiting at the same time a very minute reticu-
lation. Abdominal segments decreasing regularly and gradually posteriorly,
first nearly as wide as the contiguous elytra ; border strong ; surface convex,

■.-, T

MM

CO

NORTH AMKRICAN

polisliffl, very sparsely and finely piinctulate ; transverse carinae tricusjiid,
middle cnsps fine and auieular, lateral nearly as long, dilated at apex, and
inclined inward, intervals moderately sinuate. Under surface dark jjiceous.
Legs rather slender, piceous ; first joint of the posterior tarsi twice as long
as the second, second notably longer than the third.

Miilv. — I'osterior edge of the fifth ventral segment feehly eniarginate in its
middle third, emargination evenly rounded, ten times as wide as deep, con-
tiguous surface sonn^what deeply and conically impressed, impression disap-
pearing anteriorly at one-half the length of tlie segment, having llu» borders
sharply defined and clothed with exceedingly long st'tae ; sixth si^gnient
sinuate at ap'ex, sinus acutely rounded at bottom, twice as wide as deep ;
seventh broadly and deeply emarginate at apex, provided with two long stiff
setae.

Female. — Sixth segment evenly rounded behind without any perceptible
irregularity.

Length 3.8-4.0 mm.

Cambridge, Massachusetts, 1 ; Grimsby, Ontario, 3 ; liliiiois, 1 ;
Nebraska, 1.

Resembles intrvsus somewbat ; it may be distingiiisbed at once
from tbat species by its deeper, closer, and much more clianneled
elytral sculpture, as well as by very decided dlHerences in tlie sexual
characters. It appears to be much less abundant than intrusus, and
is very slightly more elongated in form.

41. S. acubiosiis n. sp. — Form nearly as \n fenmratns. Pubescence very
short and sparse, sub-recumbtMit, fine, pale flav -inereous on the abdomen,
dark plumbeous on the remainder of tiie upper surface. Head robust, twice
as wide as long; interocuiar surface scarcely twice as wide as the eye, dis-
tinctly depressed ; longitudinal elevation slightly narrower than the lateral
portions, rather strongly and evenly convex ; sulcations distinct ; punctures
small, round, isolated,. moderately impressed, close; ocular lines meeting at
slightly less than one length in advance; antennae distinctly long(?r than
the width of head, slender, basal joint black, remainder dark piceous-brown,
club slender, much elongated ; third joint slightly bent, more than one-half
longer than the fourth, fourth and fifth equal, sixth and seventh snb-equal
in length, the latter much the more robust, eighth one-fourth longer than
wide, as roltust as the seventh, ovoidal, joints of club increasing very rapidly
in length, last nearly twice as long as wide ; maxillary palpi long and slender,
piceous-brown throughout. Prothorax arcuately, evenly, <and rather rapidly
increasing in width to a point distinctly behind the middhi, where it is
five-sixths as wide as the head, and slightly narrower than hmg; sides
tlience rapidly convergent posteriorly and distinctly sinuate ; anterior margin
slightly shorter and very slightly more ai'cuate than the posterior ; surface
strongly and distinctly tuberculate near the basal angles, transversely and
feebly impressed just behind the apex ; feebly, minutely, closely, and con-
fusedly punctate, transversely channeled in front of the middle ; canalicula-
tiou terminating at equal distances from the base and apex, fusiform, rather

COLEOrTERA.

61

ileeplv impressed, slightly more than one-half as long as the pronotiun,
Ixittom imptinctate and .shining. Elytra at hast; distinctly narrower than
the head ; sidei^ moderately divergent posteriorly, slightly longer than the
width at hase, feebly arcuate ; together broadly and rather strongly emargi-
nate behind ; suture on<;-lifth longer than the }>ronotum ; surface rather
depressed, feebly impressed on the suture near the base, rather feebly, very
closely and confusedly punctate ; punctures seldom coalescing, interspaces
varying in width, moderately convex, and comparatively lustreless. Abdo-
minal segments decreasing uniformly and very gradually in width, first very
slightly narrower than the contiguous elytra; surfacie shining, extremely
feebly, iinely, evenly, and rather distantly punctulate ; transverse carinae
tricuspid, middle cusps strong, finely aticulate at apex, lateral much shorter
and broader, acuminate at tip. Legs moderate, slender, i..scous above,
femora rather pale rufous benciath, jxisterior femora long, slender, and very
straight; first joint of |)osterior tarsi twice as long as the second, and dis-
tinctly longer than the fifth, joints two to four decreasing uniforndy and
rather grailually in length.

Male. — Unknown.

Fcmnle. — Sixth ventral segment very feebly and narrowly bilobed.

Length 3.3 mm.

Miiniuette, Lake Superior, 1.

Tliis species bears a considerable resemblance to femorutus Say ;
tlie similarity is superficial, however, as the punctuation is of an
entirely different order.

42. S. vespertinus n. sp. — Form robust. Pulwscence moflerately
short, fine, semi-erect, setiform, rather close, evenly distributed, pale piceo-
cinereous. Head rather small, robust, twice as wide as long ; interocular
surface nearly Hat, twice as wide as the eye, e(iually trilobed by the very
strong rounded sulcations ; intermediate surface evenly and strongly con-
vex ; finely, rather evenly, and somewhat distantly punctate, interspaces
flat and moderately lustrous ; ocular lines meeting at two-thirds of a length
in advance ; antennae very slightly longer than the width of head, piceous-
black, slender, club moderate ; third joint one-third as long again as the
fourth, fourth and fifth equal, sixth and seventh equal in length, the latter
one-half as thick again, eighth as wide as long, sub-globular, joints of club
sub-globular, last slightly elongated ; maxillary palpi rather long and slen-
der, piceous-black, first joint deep rufo-testaceous, third somewhat flattened
and dcujely clothed with short, semi-erect, cinereous setae. Prothorax
robust, widest just before the middle, where it is four-fifths as wide as the
head, and as broad as long ; sides thence slightly less rajjidly convergent
anteriorly than posteriorly, and nearly straight; anterior margin slightly
longer and more ai'cnate than the posterior ; surface nearly evenly convex,
very faintly and obliquely tuberculate near the basal angles ; finely, moder-
ately closely, and rather confusedly punctate, interspaces flat ; canalicula-
tion in the form of a very faint erosion, which is, however, clearly outlined,
slightly nearer the base than the apex, and two-thirds as long as the pro-
notum. Elytra at base distinctly wider thau the head ; sides very feebly

62

NOHTII AMKUICAN

(livcrscKt ]instiTii)rly, just jn'rccptilily longer thiiii Iwaal wiiUli, mid ratlicr
ft'(*My ai'c'UJiti' ; tn(,'t'tlu'r rntluT broadly niiil stroiifjly uinar);inat(! lichiiid;
siitiiri' alidiit oiK'-tliird an Ion;; n^aiti as tlio i)roiiotiini ; Hurfaci^ ratlicr (•oiivcx,
very lc(!l)ly iiniircsscd on the sutiiiM; unar the liaHc, rather Unely and moder-
ately cloHely piuictiired ; puncture's confused near the exterior margins, mote
distant and even near the siitnve, where they are Heldom eoa!esc(Mit ; inter-
spaces nearly Hat, polished. Abdominal segments decreasing uniformly and
gradually in width, first as wide as the contiguous elytra ; surface Vi'iy broad,
rather coarsely, closely, and evenly punctulate, much more linely so toward
till! tip, and also finer at the apices of the segimmts than at the bases ; trans-
verse carinae tricuspid, middle cusps strong, rather long and finely acumi-
nate at tip, lateral scarcely one-half as long, broad, somewhat rudimentary.
Legs rather short and stout, black throughout ; first joint of the posterior
tarsi two-thirds as long again as the second, somewhat longer than the last,
second much longer than the third, first four joints cylindrical and eijiial
throughout in thickness, fifth ioint narrower at base than at tip.

Mali-. — Unknown.

Female, — Sixth ventral segment broad and evenly, though rather obtusely
rounded behind.

Length 3.1 mm.

Tenino, Wasliington Territory, 1.
This is a very distinct species.

43. S. couvictor n. sp. — Form very moderately robust. Pubescence
short, fine, rather close except at the lij) of \.\w abdomen, where it is fine,
long, sparse, and recumbent, piceous. Head robust, not twice as wide as
long ; iuterocular surface nearly three times as wide as the eye, flat, closely,
rather coarsely, evenly, and sub-variolately punctate, punctures often coales-
cing ; longitudinal idevatiou narrower than tlie lateral portions, evenly and
ratlier strongly convex ; ocular lines meeting at one and one-half lengths in
advance ; antennae slightly longer than the width of head, slender, piceous-
black, club raodei'ate ; third joint one-third as long again as the fourth,
fourth very slightly longer than the fifth, eighth as long as the ninth, last
joint much elongated, acuminate at tip ; maxillary palpi rather long and
slender, first joint translucent, testaceous, remainder piceous-black. Pro-
thorax robust, arcuately widening to the middle, where it is five-sixths as
wide as the head and as broad as long ; sides thence rather strongly conver-
gent, and very feebly sinuate ; anterior margin shorter and more arcuate
than the posterior ; surface slightly swollen along the sides and at the edges
of the canaliculation, transversely and rather strongly impressed just behind
the anterior margin ; rather finely, very closely, evenly, and very confusedly
punctate ; punctures sub-variolate, very irregular in outline ; canaliculation
rather narrow, impressed, terminating at equal distances from the margins,
three-fourths as long as the pronotum. Elytra at base just perce])tibly
broader than the head ; sides very moderately divergent posteriorly, longer
than the width at base, and feebly arcuate ; together broadly and very ftsebly
emarginate behind; suture nearly one-third as lon^r again as the pronotum ;
surface rather convex, impressed on the suture toward the base ; very closely,

COLKOPTERA.

03

finely, and ronfiiHcdly ,sculi)ture(l ; iJinicturcH only isolated near tln^ inner
basiil Mn},'l('H, eJHi'wliere coali'scent in very lonj,' eliannels, wliieh ace iisiiaily
liingitiKliiial near Hit! Mnture. Abdominal McgmentH deert-a.-^iiig unit'ornily
and moderately rapidly in width, first notably narrower than tlie (;ontij;u(Ui8
elytra: surface rather convex, liifjhly jioIIsIkmI ; feehly, finely, closely, and
evenly pnnctiilate ; transverse carinae frii'uspid, middle ciisiis tine and
aciculato, lateral broad, lar^e, and vary confusedly outlined. Legs ratlier
short and slender. Mack above, jiieoous-brown beneath; first joint of the
jiosterior tarsi four-llfths as long again as the second, slightly longer tlian
the last, and eijual to the second and third together.

Male, — Fifth ventral segment not nioditled ; sixth segment sinuate at apex,
sinus and apiues eijnal in width and curvature, sinus twice as wide as deep;
seventh segment feebly t-marginate at tiji, emargination evenly rounded and
very slight, teeth not developed.

Frimile. — Un k nown .

Length 3.3 mm.

Washington Territory, 1.

44. S. COnfllHll!^ n. sp. — Form moderately robust. Pubescence exces-
sively tine, sparse, and short, sotiform, cinereous. Head rather large, twice
as wide as long ; interocular surface feebly excavated, twice as wide as the
eye, finely, rather closely, and evenly punctured ; punctures round and
sometimes partially coalescing ; longitudinal elevation narrower than lati'ral
I»irtions, strongly a'ld evenly convex, prominent, crest impunctate ; ocular
lines meeting at one length in advance ; antennae scarcely longer than the
width of head, rather slender, club distinct, dark piceons-brown ; third joint
one-third as long again as the fourth, fourth and lifth equal, sixth and
seventh ecpial in length, shorter, eighth elongated, broader than the sixth,
joints of club increasing uniformly in lengtli and thickness ; first joint of
maxillary palpi rufo-testaceous, base of second darker, remainder piceous.
Prothorax widest at one-third its length posteriorly, where it is three-fourths
as wide as the head and very slightly narrower than long ; sides thence very
moderately convergent and nearly straight; anterior margin more arcuate
and just perceptibly shorter than the posterior ; surface faintly bitul)erculate
at tlio sides, feebly and transversely impressed behind the anterior niaigin ;
finely and somewhat evenly punctate, interspaces one-half as wide as the
punctures, rather flat, shining ; canaliculation distinct, fusiform, deeply
impressed, beginning just before the middle and extending posteriorly for
two fifths the total length. Elytra at base distinctly narrower than the
head ; aides moderately divergent posteriorly and nearly straiglit, longer
than the width at base; together very broadly and triangularly eniarginate
posteriorly ; suture slightly longer than the pronotum ; surface convex, im-
pressed along the suture, strongly so at base ; each elytron also has a short
longitudinal impression in the middle at the base ; finely and irregularly
punctured, punctures widely separated near the inner basal angles, closely
crowded near the middle and exteriorly, interspaces flat, poiished. Abdo-
minal segments decreasing excessively gradually but uniformly in width,
first somewhat narrower than the contiguous elytra ; surface broadly convex,

44

■I

W.

Ill

I'm

64

NORTH AMKHICAN

flnnly ami ratii«r oloHcly puiictiilate ; traiinvfrso oarinno trieuspid, ciLsps
widdly s('|i;iiiitf(l, slioif, iiiiilillt^ mn's aciciilatc at t>p.s ; iiiidtT siiiiacf lliicly
and sparsi'ly puuctulati-, pi(u«>in-l)lack, deiiHcly ptiln-sciMit. Legs inodcrati',
fuscd-pirt'oiis ; llrnt joint of the posturior tai'Hi twice uh long as the second
socond very slif,'iitiy longi'f than the tliird.

Mule. — L'lilvMown.

Fcmule, — Sixth vt^ntral se>;uient Iiaving traces of a slight hilohation at
apex, otherwise evenly rounded.

Length 2.7 mm.

Wliite Fisli Point, Micliigan, 1.

4r). 8. inorikatllH n. sp. (Sohwarz MS.). — Form rather slender. Puhes-
cenco moderately close and long, semi-erect, setiform, cinereous, and rather
conspicuous. Head moderate, slightly more than twice as wide as long ; inter-
ocular surface nearly Hat, sliglitly more than twi(!e as wide as the eye ; closely,
evenly, and linely punctate throughout ; interspaces one-half as wide as the
punctures, convex, polished ; longitudinal elevation as wide as tlio lateral
portions, evenly and moderately convex, very apparent ; ocular lim-s meeting
at over two h^ngths in advance ; antennatt longer than the width of head,
rather slender, piceous-Mack, chih small ; third joint one-third as long again
as the fourth, fourth and llfth ecjual, sixth much longer and narrower than
seventh, eighth elongated, nearly as thick as the seventh, joints of cluh
increasing in length, last two equal in width, last as long as the eiglith and
ninth together ; maxillary palpi dark i)iceous, first joint slightly paler.
Prothorax widest slightly before the middhs where it is four-llfths as wide
as the head, and very slightly narrow-T than long ; sides thence very moder-
ately eonvei'gent posterioi'ly and very feebly simiate ; anterior and posterior
margins equal in length, the former the more arcuate ; surface rather evenly
convex, closely, rather finidy, and evenly ]iUnctur(Hl ; punctures polygonal
in outline, interspaces one-fourth their width, convex, and polished ; canali-
culation distinct, sotnewhat irregular in outline, roundly ini]iressed, begin-
ning slightly before the middle, and equal in length to one-llalf that of the
pronotum. Elytra at base as wide as the head ; sides nearly parallel, slightly
longer than the width at base; together moderately euiarginate posteriorly;
suture slightly longer than the pronotum ; surface evenly and rather strongly
convex, deejily, very closely, rather finely, and evenly punctate^, interspaces
narrow, convex, and polished. Abdominal segments decreasing uniformly
and extremely gradually in width, lirst as wide as the contiguous (dytra ;
surface convex, evenly, rather coarsely, and moderately closely punctulate ;
transverse carinae i:ricuspid, middle cusps long and acicular, lateral one-half
as long, broad, truncate at tip. Legs dark piceous above, rufo-pieeous be-
neath, rather short and stout ; first joint of the posterior tarsi three-fourths
as long again as the second, and as long as the second and third together,
last joint longer than the first.

Mah. — Posterior edge of the fifth ventral segment feebly emargiiiate in its
middle fourth, emargination evenly rounded, and ten times as wide as deep,
contiguous surface flattened throughout anteriorly, and bordered with long,

COLEOI'TKUA.

or)

siiiii-i'Odumbeiit, picoouH Hcitnti ; sixth Hogmcnt Himintt^ nt nju-x, HiniiH Home-
wliiit iiioro brixiilly iouikIi'iI tliaii tln' iipid'H, four titni'H ah wi(l« hh ilci-p.

l-'imiilf. — Sixth Hci,'iiiciil i'vi')ily rdiiinlcil licliiml throughout.

I,i'ii),'tii :J.(!-2.!I mill.

('ainl»ritl<;»s ]\IasMiicliii8etts, -l ; Detroit, Micliiyim, 7 ; Wliite Fish
Point, Lake Superior, 1.

4ii. M. llliK'idllH II. s|>. — Form moih'iatcly sit'iidiT. l'iih<'HC(!iic(> very
niiort, tiiii', Nimrst", rt'ciirnhfiit, ciiu'rcoiin, Kcnrt'dy visilih-. Head rohiist,
srarci'ly twice as wIiIh an loiij; ; intcroculnr «iirfacn twii:t> ah wide ax tho cyt',
iiioilitratt'ly cxoavatt'd, equally trilolii^d hy tho I'ouiidfd, but coiiHiiiciioiis sul-
calions ; iiiti-iini'diati' smlaff I'Vi'iiiy and rather stroiifiiy cdiivex ; imiietiires
ratiier coar.io, ^l();^t•, and evenly distrilnited ; oeiilar lines meetinj; at one
leiij^th in advanco ; antennae slenih-r, longer than tins widtli of head, tlrMt
joint lilack, remainder dark pieeoiis-hrown, eliili distinct ; third Joint oiie-
tliinl as loi:<^ a^'ain as the I'oiirth, I'oiirth and tilth siil)-e(|iial, sixth anil
si'venth eiiiial in length, the latter tliieker, eighth slightly longer than wide,
joints of cliih iinifornily increasing in length and tliiekness ; maxillary palpi
]iiceous-hro\vn, tirst joint llavo-testaceoiis. Prothorax rcdaist, widest just
hefore tliH middle, where it is four-llftlis as wide as the head, and ahont as
hroad as long ; sides theiictt very moderately convergent posteriorly and
iii'ai'ly straight; anterior and jiosterior margins eijiial in length, the former
niiii'li the more arcuate ; slirlace feehly tiiherciilate along the sides, especially
towaiil the base, very closely, rather liiiely and somewhat uviMily jmnctate;
canaliciilntion very obscure, being merely a slight, irregular erosion, coni-
nieiicing liefore the middle, one-third as long as the i>ronotiini. Elytra at
base just perceptibly narrower than tlu^ head ; sides rather strongly diver-
gent posteriorly, very feebly arcuate, equal in length to the width at base ;
together broa<lly, rather strongly and triangularly (>m,'irginate liehind ; suture
slightly longer than the pi(Uiotmii ; surtjUH' somewhat depressed, nearly even,
coarsely, closely, irregularly, and sub-vai iolately punctured ; punctures more
isolated near the inner basal angles. Abdominal segments decreasing uni-
fonnly and somewhat ra)>idiy in width, lirst a little narrower than the con-
tiguous elytra ; surface broaiily convex, rather coarsely, closely, and evenly
]>unctulate; transv(M'se oarinae tricuspid, lateral cusps short, broad, and
nidiiiientary, middle long, finely aciculate, conspicuous. Legs rather sliort
and robust, fuscous, under sides of femora nearly rufous ; tirst joint of jioste-
rior tarsi two-thirds as long again as tlm second, as long as the last, second
distin<'tly longer than the third.

.!/((/('. — Posterior edge of the fifth ventral segment just jierceptibly iiicur-
vate in the middle ; sixth segment feebly sinuate at apex, sinus rather broad
and extremely feeble.

hamuli'. — Sixth ventral segment evenly rounded behind.

Length 2.r)-2.7 mm.

Detroit, Michigan, !).

riie sexual characters of this species are very f'eeh' but still of
such a nature as to be almost unmistakable ; the sixth segment is
Stenini. 5

t i I
\J .1

\ \

n

m

66

NOUTII AMEKICAN

ratlier narrow, .'iihI i ■ tnim-atcd ratlicr broadly at tlio tip, witli tlie
side angle.-! rounded, and the tiuiu-i.tion slightly incurvate in the
middle.

Then! is before me a speeime.n from IMarrpiotte, INIichigan, which I
have referred to this s|)ecies, althougii it presents a slightly diH'erent
facies, and is ratlier more slender.

47. S. ineiiila.X n. sp. — Form ratlicr .silcndfr. Pnlx'soenpo as in iiulitjcns,
but loiii^^cr iiiid more rccmiibeiit on thu alxlonii'n. Head ratlier rol)iist, twice
as wide as loii^ ; interocular surface iiiodeiately depressed, very linely, inoder-
jitely sparsely, and ratlier evenly punctate, interspaces very tlat, rather
lustrous ; lonj^itudinal elevation distinctly narrower tlian the lateral por-
tions, evenly and strongly convex, prominent, summit narrowly impunctate;
ocular lines meeting at nearly two lengths iu advance ; lirst joint of antennae
black, second dark jiiceous-brown : lirst joint of maxillary palpi and base of
the second ]>ale testaceu.-,, i-'Uiaimler piceous, third joint not greatly exceed-
ing the second in length. Prothorax widest at the middle, where it is three-
fourths as wide as the head, and about as wid(! as long ; sides tlience equally
convergent anteriorly and posteriorly, and nearly straight; anterior and
posterior margins equal in length, the fornu'r strongly arcuate, the latter
straight; surface rather strongly tuberculate near each basal angle, trans-
verscdy and feelily ini])ressed just behind the anterior margin, finely, rather
closely and somewhat irregularly juuictate ; punctures more isolated at the
middle, interspaces highly polished, flattened ; canaliculation in the form of
a very faint and just perceptible longitudinal erosion. Elytra at base some-
what narrower than the head ; si<les rather strongly div(!rgeiit posteriorly,
slightly longer than the width at base and very feebly arcuate; together
roundly and rather strongly emarginate behind ; surface depressed, feebly
and broadly impressed along the suture, very closely punctate, punctures
growing more coarse and conlluent toward the apices. Abdominal segments
decreasing rather uniformly and gradually in width, first scarcely as wide as
the contiguous elytra; surface broadly convex, coarsely, closely, and evenly
punctulate, more linely so toward the tip ; transverse carinae tricusjiid, mid-
dle cusps line and aciculate, lateral sliorti:r and bifurcate. Legs mo<lerate,
rather pale fuscous ; first joint of the posterior tarsi three-tifths as long again
as th(! second, and somewhat shorter than the last, second joint nearly as
long as the third and fourth together.

AJitle. — Unknown.

Fciiuilf.. — iSixth ventral segment somewhat acutely and very evenly rounded
behind.

Length 2.4 mm.

Cambridge, Massachusetts, 1.

The antennae are missing with exception of the first two joints.

Ill this particular portion of the genus the specific differences
become very slight and somewhat uncertain ; without previous study
and long-continued observation the species might be pronounced in
some instances identical. The specimens combined in eriensis and

COLEOPTERA.

67

i

th tlie
in the

vhWh I
ittfreiit

ist, twice
r, inoiler-
t, rather
eral por-
nuictute ;
iiiiti'iinae
1(1 l)ase of
ly «xci'e<l-
t it; tlivee-
ce equally
Ifvior and
till- laltor
glu, traiis-
oly, rather
Ui'il at the
the t'onn of
hast' some-
[Mtsteriorly,
together
,sea, feehly
puiietures
al segments
■IS wiih^ as
and (evenly
nsi>id, n>id-
s moderate,
htng again
i\t nearly as

nlv rounded

,'0 joints.

(lifft'i-ences
■vious study
)nounc('il in
eriensis untl

jildcldus wore at first described as tlirec or lour distinct species, and
I liave suppressed all but those here given in order to satisfy my mind
more completely of the validity of at least these typical representa-
tives. The series of specimens are scarcely large enough to admit of
con(dusive judgment, but I am almost convinced that I have under-
stated the number of species.

4s. S. erieiisis n. sp. — Form as in jilaridiiK. Puheseence short, fine,
senii-ereet, s('tiforni, ratlier sparse, cinereous, coarser and longer on tiie
elytra than on the ])rothorax and head. Head rohust, twice; as wide as long ;
interocnlar surfaoe twice as wide as the eye, nearly Hat, liiiely, very closely
and rather evenly pinictate ; punctures more distant along the middle ;
longitudinal elevation as wide as latera' portions, broadly and feehly con-
vex ; ocular lines meeting at one lengtli in advance ; antennae slender, dark
piceous, basal joint black, club moderate ; third joint oncvthird as long again
as the fourth, fourth and fifth equal, sixth somewhat longer and narrower
than the seventh, eighth very slightly elongate, as wide as the seventh,
middle; joint of club widest ; maxillary palpi jiiceous, first joint much paler,
Prothorax robust, widest at onevhalf the length posteriorly, where it is four-
liitlis as wide as the head, and very slightly narrower than long ; sides thence
moderately convergent and straight ; anterior margin longer than posterior,
(Mjually arcuate; surface somewhat tuberculate at the siiles, finely, closely,
and (Evenly punctate, Interspaces one-third as wide as the punctures, very
convex, polished ; canaliculation just visihle as an irregular and short erosion
of tht; surface just behind the middle. Elytra at base as wide as the head ;
sides very moderately divergent posteriorly, very slightly longer than the
width at base and feebly aroiate ; together broailly and vtu'y fe(d)ly emargi-
nato behind ; suture nearly one-fifth as long again as the pronotum ; surface
V(>ry feebly impressed along the suture, rather coarsely, very closely, deeply,
and somewhat irregularly punctate ; punctures in contact longitudinally
hcliind and near the suture, sometinu's isolated anteriorly. Abdominal
segments decreasing uniformly and (juite rapidly in width, first as wide as
the contiguous elytra ; surface broadly convex, rather coarsely and irregu-
larly punctulate, more distantly so in the middle of the segments, and more
finely toward the vertex ; transverse carinae tricuspid, unddle cusjjs long
and finely aciculate, lateral very small, distant, and rudimentary. Legs
nuiderate, dark piceous-brown ; first joint of the posterior tarsi four-flfths as
long again as the second, as long as the next two together, last joint ni-.ich
longer than the first, as long as the second, third and fourth t()gether. Under
surface of the abdomen dark piceous, finely punctulate. Body winged.

Male. — Posterior edge of the fourth ventral segment emarginate in its
middh; third, emargination evenly rounded and just perceptible, contiguous
surface flattened and bordered with long setae; fifth se'"nent emarginate in
its middle fourth at apex, emargination very evenly rounded, five to six times
as wide as deep, contiguous surface flattened and horder(>(l with long setae •
sixth segment sinuate at apex, sinus slu'.rply rounded, twice as wide as deep,
sinus and vertices ecpial in extent.

Femule. — Unknown.

Length 2.4-2.6 mm.

1.

(J8

NORTH AMERICAN

Detroit, ^licliijian, .'3.

Botli tcniniiiil joints of tlie antennae in the above type specimen
are (U'e|)ly indented almost tiiroiigiiout tiieir lenjitli and breadth
below, but I can find no sign oF such a malformation in the other
specimens. This sjx'cies is quite distinct from these which most
resemble it, in the elongated terminal joint of the tarsi.

49. S, sphacrops n. S]). — Form moderately slender. Pubesccnico rather
long, reciimlieiit, elose, and abnndant on the abdomen, much more sjiarse on
the remainder of the upper siirfa(.'e, llavo-cinereous. Head larg(^, more than
twice as widt* as long; interoeular surface twiee as wide as the eye, iieaily
tlat, finely sub-variolately, rather elosely and evenly punctate; longitudinal
elevation wider than lateral ijortions, evenly convex and distinct; ocular
lines meeting at three to four lengtlis in advance : anttmnae slender, much
longer than the width of head, piceous-hlaek, paler toward the tip, dub
moderate, slender ; joints thi'e(! to seven much elongated, third joint one-
third as long again as the fourth, fourth and fifth sul)-e(iual, sixth and
seventh sub-eijual in length, shorter, the latt(>r slightly thicker, eighth
three times as long as wide, joints of club elongated, increasing in length ;
maxillary palpi long and slender, piceous-black throughout. Prothorax
widest at the nuddle, where it is two-thirds as wide as the luvad, and dis-
tinctly narrower than huig ; sides thence moderately convergent posteriorly
and feebly sinuat(> ; anterior margin slightly longer and more arcuate tbau
the posterior ; surface rather strongly tuberculate along the sides toward
the base, liuely, very closely, deeply, and irregularly punctate; punctures
crowded and transversely elongated near the margins, often widely isolated
near the middle, along the middle throughout the entire length there is a
narrow line sunken sliglitly l)etow the gi^neral surface, from which the imnc-
tures seem to stream out. Elytra at base distinctly narrower than the head :
sides feebly divergent posteriorly, equal in length to the width at base, very
feebly arcuate, mort; so posteriorly ; togethtu- broadly and feebly emarginate
behind; suture equal in length to the i)ronotum ; surface rather coarsely,
very deeply, closely, and somewhat irregularly punctate, interspaces very
convex, highly ]iolished. Abdominal segnients decreasing uniformly and
rather gradually in width, fir.st sonunvliat narrower than the contiguous
elytra ; surface feebly convex, rather finely, closely, and evenly punctulate ;
transverse carinae strongly arcuate posteriorly, 4-cuspid, cusps very tine,
rather approximate, aciculate, more coarsely so on the first two segments.
Legs long and slender, fuscous, excei)t the under surfaces of the femora,
which are rufous; (ir-it joint of the posterior tarsi two-thirds as long again as
the second, as long as the second and third together, and somewhat longer
than the lifth, joints two to four uniformly and gradually decreasing in
length.

Male. — Posterior edge of the fourth ventral segment emarginate in its
middle third, emargination evenly rounding and just perc<>ptible, contiguous
surface tlattened anteriorly ; fifth segment emarginate in its mi<idle third at
apex, emargination rather strong, evenly rounded, and six times as wide as

COLEOPTEKA.

69

(Ici']), coiitigiKiiis snrt'aec ll.attciu'il, or very fccMy and (lyliiidrically iiuiii'i'ssnd
tlifoiifjliotit aiitiii-iiu'ly ; sixtli si'giiH'iit deeply sinuate at api'x, sinus evc^nly
idiiiidiug, three times as wide as deej), liaving iieai'ly tlie same curvatui-e as
tlie apices ; seveiitli segment feebly i luarginate at tip.

Fi'iiuilc. — Unknown.

Length 4.0 nnn.

Tynirsboroiijfli, Massacliusottf!, 1.

Tills fine s|)ee,ii's Is VL-ry distiiu!! ; the oyos are very larjie and (con-
vex ; the abilonien is covered densely beueatii with very long, fine,
piceoiis pubescence.

."JO. S. militaris n. sp. — Form moihirately robust. l'uh(>scenoe short,
fine, suh-reeumlieiit, s[iarse, setiform, and cinereous. Head moderate, more
tlian twiec! as wide as long ; interoeular surfact; slightly convex, nearly three
times as wide as the eye, coarsely, very closely, variolately, and evenly
punctate; longitudinal elevation wider than the lateral portions, rather
acutely convex and moderately prominent ; ocular lines meeting at nearly
three Ic'ugths in advance: antennae very slightly longer than tlu^ widtli of
head, bla(;k, club large; third joint one-half as long again as the fourth.,
joints four to seven decreasing uniforndy and very slowly in length, eighth
slightly elongated, regularly oval, joints of club increasing in huigth and
thickness, last nearly as long as the ninth and tenth together; maxillary
palpi short, piceous-black, first joint very slightly paler. Prothorax robust,
widest at the middle, where it is four-fifths as wid(! as the head and just
perceptibly narrower than long ; sides thence equally convergent iinteriorly
and posteriorly, and nearly straight ; anterior and posterior margins e(|ual in
length, the former slightly the more arcuate ; surface transversely and very
faintly impressed just behind the apical margin, and feebly tuberculate at
the sides near the base, finely, very closely, souKiwhat regularly and sub-
variolately punctured ; canaliculati )n in the form of a mere erosion in the
middle, on(!-half as long as the pronotum, and very difficult of (diseivation.
Elytra at base very slightly narrower than the head ; sides feebly divergent
posteriorly, slightly longer than the width at base, feebly arcuate ; together
briia<lly and distinctly emarginate behind ; suture one-seventh as long again
as the pronotum ; surface faintly impressed along the suture and feebly
tuliercuilate near the middle of each elytron, rather coarsely, closely, and
irregularly piinctUK^d, punctures rather deeply impress<!d, interspaces geni>-
rally une-fouith as wide as the punctures, convex, p(dished. Abdominal
segments decreasing uniformly and rather rapidly in width, first as wide as
the c(nitiguous elytra ; surface broadly convi'X, coarsely and distantly jinnc-
tulate, iiiucli more fiiudy and closely so toward the tip ; transverse carina'e
4-cuspid, cusps closely approximate, short, equal, and stout. Legs robust,
black above, piceous-black beneath ; first joint of the posterior tarsi two-
thirds as long again as the second, longer than the next two together, and
somewhat shorter than the last, tiiiid and fourth sub-e(iual. Under surface
of abdomen coarsely and closely punctiilate, densely clothed with long,
coarse, cinereous sv'tae, which are nearly recumbent.

m

■fT^r^

(0

NOirni AMKKICAX

: ill

:i|

Mall!. — Posterior odgo of the lifth vcntriil scgmont (nuarjiinato in its iiiid-
rlle half, cmargiuatiou tiveiily romidtMl ami just |)('rct'i>til)li' ; sixtli scgiiKMit
broadly siiiiirite iit apox, sinus very wide, somewhat auiitely rounded at the
hottom, and eight times as wide as d'.ep.

Ftinule. — Sixth segment evenly rounded behind.

Length '1J> mm.

Biitcliehwiiuunp; I5ay, Liike Superior, "2.

."jl. S. plllto n. sp. — Form robust. I'ubeseence very short and sparse,
sub-reciimlient, pale llavo-einereoiis. Head very small, slightly more tiian
twice as wide as long ; interoeular surfaeti distinctly convex, more than
twice as wide as the eye ; longitudinal elevation wider than the lateral por-
tions, fe(d)ly convex; suleations feelile, punctures coarse, rounded, evenly
distril)ut(Ml, interspaces nearly one-half as wid<' as the punctures, very con-
vex, polished ; ocular lines meeting at somtwhat less than two lengths in
advance; antennae distinctly longer tlian the width of head, robust, club
distinct, tirst and second joints nearly black, remainder rather dark piceous-
brown ; third, fourth, and fifth joints uniformly and rapidly decreasing in
length, sixth and seventh abruptly shorter, equal in length, cordate, the
lattei- slightly thicker, eighth as thick as the seventh, glohular, joints of club
increasing rapidly in length and thickness ; maxillary i)alpi rather short
an<l rohust, piceous-black, first joint rather pale jiiceo-testaceous. Prothorax
widest slightly before the middle, wiiere it is very slightly narrowiu' than
the head and distinctly narrower than long ; sides thence feebly convergent
posteriorly and nearly straight ; anterior and posterior margins sub-equal in
length, the former slightly the more arcuate? ; surface rather strongly tuber-
culate imar the basal angles, more convex in the middle, closely, very finely,
deeply, and irregularly punctate ; canaliculation narrow, somewhat distinct,
terminating at equal distances from the base and ap(^x, nearly three-fourths
as hing as the pronotuin. Elytra at base much widtu- than the heail ; sides
feebly divergent posteriorly, slightly longer than the width at base, and
strongly arcuate ; together roundly and somewhat feebly emarginate behind ;
sutur(! nearly one-fourth as long again as the pronotum ; surface narrowly
and feebly impressed along the suture, deeply, very closely, rather finely and
exceedingly irregularly channtded, interspaces convex and highly polished.
AbdonVTir*' segments decreasing very nniforndy and rather I'apidly in width,
first slightly narrower than the contiguous elytr.i ; surface polished, finely
and sparsely punctulate ; transverse carinae 4-cuspid, cusps (Miual in length,
equidistant, ratlnu' long, fine and generally enlarged slightly at the tips.
Legs slender, i)iceous-black ; first joint of the posterior tarsi short, four-
fifths as long again as the second, distinctly shortta- than the fifth, second
and t' <rd equal, fourth slightly shorter, as wide as long ; tarsi nearly cylin-
drical I i'loughout.

Mule. — Posterior edge of the fifth ventral segment just perceptibly emargi-
nate in the middle ; sixth segment very broad at apex, where it is broadly
sinuate, sinus occnjiying nearly the entire segmental apex, evenly roumled,
and about eight times as wide as deep ; seventh broad and truncate at tip,
lateral setae moderat(dy developed.

/Vhkj/p.— Sixth segment very broad, evenly rounded behind.

Length 2.7-2.8 una.

him

fV

fe

dec

row

.lis

sh,

and

first

sllCJI'

.1/1

fiftl

tig I
at a
abou
trun

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L

?'5l I ■ I,'

COLEOPTERA.

71

r;iml)r'nl,u;(', Ariissaclmsctts, ,1,

This species is reiulily distiiignislied by tlie larsjil structure, uiul
th« very irregular channeled sculpture of the elytra.

ri'i. S. iiicultlis n. sj). — Form nioiicratcly slciulcr. I'uliescence rather
long, closo, rnciiiiil)(Mit, cinort'ous, very conspicuous on tlie ■•ilxloiuen. Head
ratlior small, twice as wide as long; interocular surface scarcely twice as wide
as the eye, just i)erce])til)ly d<'pressod ; almost 'Hjually trilobed by the very
indistinct sidcations ; intermediate surface very feebly ccnivex, jinnctures
nioderattdy coarse, rather close and even, occasionally coalescent in twos or
threes ; ocular lines meeting at one length in advance ; antennae much longer
than the width of head, black, slen<ler, club moderate and rather densely
cIoUkmI with short cinereous j)ubescence ; third joint omvthird as long I'gain
as th(! fonrtli, fourth and fifth ecpial, sixth and seventh joints but little
shorter, the latter very slightly the shorter and thinker, eighth feebly (don-
gated, slightly thick<'r tlian the seventh, ovoidal, joints of tduli imtreasing
uniforndy and very gradually in length and thickness; niaxilliiry palpi
moderate in length, piceons-black tbrougbont : labrum narrow ami very
strongly' arcuate ant<'riorly. Prothorax vei-y gi'ailtially and arcuately widen-
ing to a point just in advance of the middle, where it is fonr-flftlis as wide as
the head, and nearly one-sixth narrower than long; sides thence moderately
convergent and very fe(d)ly sinuate ; ant<'rior margin distinctly longer than
the ]M)st<'rior, equally arcuate ; surface almost evenly convex, rather limdy,
feebly, closely, coalescently, and somewhat confusedly jiunctate ; canalicula-
tion in tlu' form of a narrow, indistimitly outlined, shallow erosion, extending
nearly to the margin. Elytra at base just perceptilily wider than the head;
sides almost parallel, slightly longer than the width at liase, ratluM- strongly
and evenly arcuate; togetlier broadly and ratlier strongly emarginat(! he-
hind ; suture about one-eighth as long again as the pronotum ; surface very
feebly imi)r(>ssed on thc^ suture at the base, rather finely, v(>rv closely, rather
fcel)ly, and very confnseclly punctured and chaiiinded. Abdominal segments
decreasing uniformly and very gradually in width, first very slightly nar-
rower than the contiguous elytra ; siirfa<!e moderately conv<'x, linely, rather
distantly, and evenly puiictulate ; traiisverse carinae 4-cus]iid, middle cusps
short, fine, and acicnlate, lateral broader and acuminate. Legs rather long
and slender, black, rather densely clothed with short cinereous jmbescemce ;
first joint of tlu! posterior tarsi one-half as long again as the second, distinctly
shorter than the last, second nearly one-half as long again as the third.

.\fiile. — Fifth ventral segment very fe(d)ly emarginate in its middle three-
fifths at apex, emargination evenly rounded, and scarcidy measurable, con-
tiguous surface normally convex ; sixth segment broadly and feebly sinuate
at apex, sinus nearly as broad as the entire segment, very evenly rounded,
about ten times as wide as deep ; seventh segment narrow and almost squarely
truncate at the apex, teeth very small, acute.

Fimule. — Unknown.

Length 3.1 mm.

Arizona, 1.

-:»»«» ..u,^.^^.

72

NOUTII AAIKRICAX

% "

r)3. S. pterobrncliyH fi. and II. — Form niodi'i-ati^ly slt-iidcr. I'libcs-
ccucu very line, long, sparse, and riMMinilu'iit, (.•iiii'rciius. Head large, sliglitly
movo. than twice as wide as long ; interiiinilar surface flat near the? eves, not
twice as wide as tlie eye, (iiwly, vai'idlately, and coniewliat distantly imnctate
near the eyes, wlioUy ini])unetat(? in the middle third; longitudinal eleva-
tion wider than the lateral jiortions, evenly and very strongly eonvex, very
promin(!nt ; ocnlar lines meeting at one length in advance ; antennae scarcely
longer than the width of head, slender, tlavate, last two joints infuscate,
chill moderate; third j<iint one-half as long again as the fourth, fourth and
fifth equal, eighth suli-gloliular ; maxillary jialpi flavate, last joint very
slender. Prothorax very rolinst, widest very slightly before the middle,
where it is four-tifclis as wide as tlie head, and as hroad as long; sides
thence very moderately converg(^nt jiosteriorly and nearly straight ; anterior
margin slightly longer and more evenly rounded than the posterior ; surface
very faintly tuberculatt' at the sides m'ar the base, minutely, feidily, dis-
tantly, and (^'enly jiunctatc^ ; canaliculation fusit'orni, d<M>i)ly impressed, two-
thirds as long as the pronotum, terminating near the posterior margin.
Elytra at base narrower than the head ; sides strongly divergent [)osteriorly
and very strongly arcuate, as long as the width at l)ase ; together broadly
and ratluir strongly emarginate behind ; suturi^ distinctly sliorter than tlu>
pronotum ; surface broailly and feebly impressed along the suture, very
feebly and somewliat distantly, but confusedly punctured. Abdominal seg-
ments decreasing uniforndy, but very gi'adualiy in width, first as wide as
the c(^ntiguous elytra; surface broadly convi'x, teelily and rather distantly
puuctulate ; transversi; cai'inae not cusped. Legs moderate, llavate through-
out ; first joint of th(! jiosterior tarsi tu ici^ as long as the second, and as long
as the next three together, last joint very short.

Male. — Unknown.

Female. — Sixth v<'ntral segment acutely produced at apex, cusp prominent.

Length 2.4-2.7 mm.

Alaska, 2.

This is the S. hrevipeniu's, of ^liikliii, and is so distinct tiiat,
altlioiigii I liave been unable to describe tlie male cliaracters, its
ideiititication will always be very easy.

■')4. S. COrvilS n. sp. (Schwarz MS.). — Form rather robust. Pubescence
very short, sjiarse, sub-erect, rather coarse, jticeo-cinereous ; flavate on the
abdomen, where it is much more dense toward tlie margins. Head moderate,
robust, twice as wide as long; interocular snrface three times as wide as the
eye, very modi>rately depressed, nearly equally trilobed by the longitudinal
sulcations, which are rather feeble ; intermediate surfaci! rather feebly con-
vex ; punctures extremely close and confused, surface evenly though coarsely
roughened, lustreless ; ocular lines meeting at somewhat more than one
length in advance, strongly curvate anteriorly ; eyes narrow ; antennae
slightly longer than the width of head, slender, club large, basal joint
black, second somewhat ])aler, remainder piceous-brown ; third joint one-
third as long again as the fourth, fourth and fifth equal, sixth and seventh

!'-f(;

COLEOl'TKKA.

73

<'(jual in k'lij^tli, the latter much tlie tliic-kcr, (lijihtli sli<,'litly loii;,'i'r than
wide, Hlightly cordate, and jtiat perceptibly narrower than the. seventh, joints
of clnl) incn-.'isiiig in leiii,'th, ninth small, tenth much the hroadest ; maxil-
lary paliii (lark j)ici;(iMs-bro\vn, lirst joint diuk ))iciM)-tcstacc(ius. Prothorax
arcuately, evenly, and vtu-y gradually increasing in width to the middle,
where it it* seven-eighths as wide as the head and distinctly narrower than
long; sides thence feebly convergent posteriorly and feebly sinuate ; auteiior
margin slightly longer than the posterior, (Hjually arcuate ; surface trans-
vers(dy and feebly impresseil just behind the apex, finely, extremely closely,
confusedly, and very deeply sculptured, inteispaccs acute and lustreless ;
canaliculation narrow, slight, beginning at the middle, nearly one-third as
long as the i)ronotuni. Elytra at base slightly wider than the head ; sid(\s
feebly divergent posteriorly, longer than the width at base, and nearly
straight, except toward the ai>ici's where they an^ feebly arcuate ; together
very narrowly and strongly emarginate behind ; suture nearly one-thinl as
long again as the pronotum ; surface rather finely, very deeply, extremely
closely, and irregularly channeled, interspaces acute. Abdominal si-gments
decieasing uniforndy and rather rajiidly in wi<lth, first slightly narrower
than the contiguous elytra ; surfaci; very coarsely, feebly, closely, and evenly
jiunctulate; transverse carinac not cusjied, sometimes sex- or poly-dentate,
teeth small and acute. Legs long and slender, i)iceous- lilack, tarsi very
long and sh^nder, paler ; first joint of |)iisterior tarsi three-fourths as long
again as the second, longer than the liftli, joints two to four uniforndy and
rajjidly decreasing in length, lifth as long as the thiid and fourth together.

Mule. — Fifth ventral segnnuit very fe(d)ly emarginate in the middle, curve
just perceptible and very short ; sixth segment truncate at tip.

luiiiiile. — Sixth segment narrowly, strongly, and triangularly produced at
apex.

Length 3.2-3.(J mm.

Liiko Labiu^ln,', 15ritisli Columbiii, 1 %; Fort Tcjoii, Caliiorniii, 1 J.

T)'). S. inai'itilllUS Mots. — Form moderately robust. Pubescence ex-
cessively spars(i, rather long, recumbent, fine, and ciner<'ons. Head rather
large, twice as wide as long; interocular surface nearly Hat, sub-e(pially
trilobed by the rather conspicuous sulcations ; sparsely, fincdy, and very
irregularly punctate ; longitudinal elevation moderate, almost im|)unctate,
evenly convex ; ocular lines me(>ting at one length ; antennae as long as th(>
width of head, rather slender, black, last fonr joints much paler, (dub distinct ;
third joint one-half as long again as tlm fourth, fourth slightly longer than
fifth, sixth much shorter, joints of club increasing in length ; maxillary
palpi pale flavo-testaceons throughout, third joint scarcely longer than the
second. Prothorax robust, sides strongly div(U-gent and nearly straight to a
point one-third the entir(? length from the anterior margin, wher(> the width
is nearly equal to the length, the sides thence converg*' rather rapidly, and
are almost straight ; anterior margin much shorter than the posterior, nearly
equally arcuate ; surface coars(dy and mo(lerat(dy closely punctate, punctures
feebly impressed, interspaces very convex, polished ; canaliculation roundly

. A- u i r

.!iSu

^:ma^

74

NOKTII AMKUICAN

Iniprossoil, cliiUsliaix'il, wiili'st in front, l)n>;iniiinf,' slightly Vx'foni tlio niiddlo,
oiu'-tliinl ,'is Idiij; as tli(! [H'onotiini. Elytra at bast! an wiilo as tlio lu'ail ;
siilcs niddiiati'ly divergent jiosteridrly, just pereeptilily longer than the width
at base, tetd)ly aroiiato ; together liroadly and strongly eniarginato behind;
suture one-tenth as long again as tlie in'onnluni ; surfat^i^ of each elytrtui
distinctly and longitudinally swollen in the middle near the base, very un-
even, punctures large and feebly impressed, interspaces vory convex liighly
polished. Abdominal segments (leer<>asing uniformly and very gradually
in width, (irst as widi- as the (•oiitiguous elytra; surface liroadly convex,
shining, very finely and remotely punctnlate ; transverse carinae not eusped.
Legs slender, rather dark fuscous, paler at the bases of the femora ; lirst
joint of the posterior tarsi twi(^e as long as the second, as long as the second
and third together, last joint much shorter than the first.

Male. — Fifth ventral segment eniarginato in its middle third at apex,
einarginalion evenly rounded, seven to eight times as wide as deej), contigu-
ous surface feebly imjiressed for a short distance anteriorly; sixth segmeiit
sinuate at apex, sinus large and acutely rounding at bottom, but sligl'tly
more than twice as wide as deep.

FpiikiIc — Sixth ventral segment prominently and acutely eusped at apex.

Length 4.2-4.ri mm.

Sitkii, Alasku, 2; A'aneoHVfM' Islaiid, 1.

TIk' above description was taken from tlie Vancouver female, tlie
Alaskan specimens seem to be slightly immature, as the antennae are
unit'ormly of a jiale pieeous-brown.

r)(). S. nioiitaiillS n. sp. (Schwarz MS.). — Form slender. Pubescence
rather long and sparse, recumbent, line, fnsco-cinereous. Head large,
scarcely twice as wide as long; interocular surface Hat, punctured, inter-
spaces one-half the width of tlu! imnctures, rather flat, shining ; longitudinal
elevation narrow, in the form of an acute ridge rising far above the general
level; ocular lines meeting at about one and one-half lengths in advance;
antennae slender, much longer than the width of heail, piceous-brown
throughout, club slender; third joint one-half as long again as the fourth,
fourth and lifth nearly equal, sixth distinctly shorter than the seventh, joints
of club (dinigated ; first joint of maxillary palpi testaceous, second darker,
third very rolmst, fuscous. Prolhorax very short and robust, widest at one-
third the length from tlie anterior margin, where it is as broad as long ;
sides thence moderately convergent posteriorly and straight ; anterior and
posterior margins sub-e(inal ; surface nearly even, rather coarsely and evenly
punctured ; punctures round and impressed, interspaces eipial to them in
width, shining ; eanaliculation rather feeble, narrow, commencing just be-
hind the anterior margin and becoming extinct at the base. Elytra at base
much narrower than the head ; sides strongly divergent posteriorly, longer
than the wi<lth at base and very feebly arcuate ; together broadly and just
perceptibly emarginate behind ; suture one-sixth as long again as the pro-
notum ; surface nearly evenly convex, coarsidy, feebly, and (juite evenly
punctured, interspaces much narrower than the punctures, feebly convex,

COLEOPTKUA.

76

|Milisli('il ; junictiircs only cfmlusciug in twos iicar the cxtri'irio imI^cs, jukI
thcic (iiily i):irtiiilly. First two alMloiiiiiiftl .scjiiiicnts of <'<nijil wiiltli and
>lij,'litly narrower tlian the contij^'iKius elytra; liordei' iiioilerate; siirt'aec con-
vex, coarsely, feebly, ami very closely punutulale ; transverse carinao not
cusped. Legs sU'iiiler, ])ale jiiceons ; first joint of tlie posterior tarsi twice
as lonj^ as the second, second and third tMjual in length. I'nder surface of
the ahdonien pic('ous-l)lack.

Mall'. — Posterior ed<;(! of the fifth ventral sefrnn'nt very broadly and just
l>erceptihly eniarginate ; sixth se<;nmnf sinuate at the ai)ex, sinus evenly
rounded, as wide as deep, on<'-sixth as wide as the sej^^iuental apex.

FciiKil)'. — Sixth segment broadly and very distinctly ungulate at tip.

Length 3.U mm.

New Ilumpsliire, Wliiti' IMountains, 2 (loicsts).

Tliu compunitive shortness of tin; sixtli antennal joint renders this
siiceies retidily distinguishable; it is also very distinct in other
eliaracters.

m\

•u. S. alpicola Fvl. — Form moderately slender. Pubescence extremely

fine, moderately long and rather abundant, setiform, jiale piceoiis-ljrown,
not conspicuous. Head rather larj^c, much less than twice as wide as long;
interocular surface nearly fiat, two and one-half times as wide as the eye;
(•(jnally trilobed by tb«! moderately distinct snlcations ; intermediate surface
moderately and evenly convex ; very closely, rather coarsely, and evenly
I'unctate, interspa<'es sliining; ocular lines meeting at slightly more than
one length in advance ; antennae slender, slightly longer than the width of
head, dark piceous-brown, club slender: third joint three-fourths as long
again as the fourth, fourth and fifth sub-equal, sixth and seventh e(jual,
shorter, eighth slightly elongated and just ])erceptibly wider than the sixth,
joints of club increasing in length, last nearly as long as the two preceding
together ; maxillary ])alpi very long and slender, dark piceons-brown, paler
toward the base. Prothorax rol)ust, widest very slightly ))efore the midille,
wiiere it is three-fourths as wide as the In^ad, and as wide as long ; sides
thence moderately convergent ])osteriorly and feebly sinnatt," ; anterior and
IMisterior margins eijual in length, the former very slightly the more arcuate ;
surface evenly convex, rather coarsely, closely, variolately, and somewhat
evenly i>unctate ; canaliculation conspicuous, narrowly fusiform, deep, bottom
cveidy rouniled, terminating at a distance from cither margin e<nial to one-
sixth the entire length. Elytra at base much narrower than the head, and
just perceptibly wider than the prothorax ; sides strongly divergent poste-
riorly, feebly arcuate, and much longer than the width at base; together
bi'oadly and feebly emarginate posteriorly; suture scarcely one-sixth as long
again as the pronotum ; surface rather depressed, transversely and feebly
imiiressed just before tlie middle, the impression extending posteriorly near
the external edge of each elytron ; coarsely, f'eel)ly, closely, and quite evenly
punctate, punctures ftnly coalescent posteriorly near the suture, inters[)aces
convex, very narrow, highly polished. Abdominal segments decreasing at

M

76

NOrtTII AMRllICAN

"XI

first slowly, tlicii inure rnpiilly in wiittli idistcriorl y, lirwt ilistiiictly widi-r
tlinr. the coiitijiUinis elytra; siirl'.ue lirojiilly eonvex, cnarsely, closely, ami
variolately iiuiictulate ; triiiisverne earinne not eiispi'il. Legs rather lonjj
and slender, ilark i)ici'miM- brown ; llrst Joint of tlio posterior tarsi fonr-Ht'tlis
as lotii,' af;ain as the second, second as lon<; ah the third and fonrth to).'ether,
fonrtii very short. I'nder surface of the ahdonien piccons-hlack, very finely
aiiil closely iinnctnlate.

M<ili . — Posterior e(lf,'e of the fifth ventral Hej,'nient just jierceptihly hilohed,
Jiriiis extremely divei'i^'eiit ; sixth se;;inent stronj;ly liilohed at apex, eniarf;i-
iiation twico as wide as deep; st^veiith sej^inent vory narrow, truncate at the
apex.

Female, — Sixth segment broadly and triangularly produced ; angle very
prominent.

Length 2.(!-;5.0 mm.

Garland, Colonulo, 7 ; Vcta Pass, Colorado, 2 ; British Columl>ia, 4.

A 8i)eciinen from Uritisli Colmnbia is singularly defornu'd by an
enlarjicnicnt of tiie Icl't eyo. TIk' idciitilication of tiiis s|)(;cies is due
to Mr. Famed, and as it is a sonu-wiiat rare European species, its
oei'urrence on tiic western side of our eontineiit is ratiier riiniarkable.
In one spe(Mnieii llie apical joint of tiie iid't antenna is deeply exca-
vated nearly tliroiitrliout its entire leniith and widtii, as if tiie sin-face
liad been acciidentally cruslKMl in. The probable caus«! of tliis condi-
tion, wiiicdi is of soinewiiat freipient occurrence in the species of tiiis
genus, may periuips lie in the internal structure of the terminal joint.
The interior fibres of the joint on drying contract, <lra\ving in the
weakest jiortion of the surface in sncli ii way as to leave a deep ex-
ternal concravity; its it is always found on tlu; under side, we must
presume that, at this point, tiie walls of the joint are weakest, or most
firmly attached by nerve fibres to the interior tissues. It would be
intei'esting to know whetiier tiie couditioii is ever observed in s[)eci-
mens recently taken.

Subdivision 8,
Group II.

This group consists of a very limited number of species of peculiar
appearancfi. Tiiey are of ratluir small size, robust, and somewhat
strongly depresse<l ; the elytra are large, and the humeral angles
promiiK^nt ; the head is small. Tlie (dytral suture is, in all cases, at
least one-half longer tlian the pronotum.

The sjiecies which seem worthy of adoption are fivt> in number ;
they are peculiar to the regions west of the Ilocky Mountains, and
may be tabulated as follows : —

COI.KOPTEnA.

77

■ ' ' iti

^i J i

I'r<itli(irftx ns widn ns, or wider tluin Iimg.

I.cgs black tlii'oiighout ; Idiiyitiidiiial clfvation of iiitci'oi'iilar Miirracccvi'iily

(•OllVfX.

I'roiKitimi liaviiij; a liiiit,'itudiiial ridgc-likc (dc-vatioii at tlif nidi's of the

caiialiciilatioii ; liody vi-ry roliiist fiS. CftstaliH.

I'l'onotuin not rid};<'d ; Ixidy laiicli iii(iri< slt'iidcr fit). alvcolatllH.

l'"i'iiioia <listiii(tly iiiro-l'iis( mis ; l(iiif;if tidiiial idcvatioii of intrrocular siir-
faie acute ; (iroiiotiim liaving very obscuro lateral ridges.

00, ellipf iciis.

I'riitliornx narrower than long.

icicles of jironotmn feebly areiiate ; jirotliorax suV-cylindrical, very dis-
tinctly narrower than long til. u<It>IO|iH.

tildes of pronotuni strongly arcuate anteriorly; iirothoiax very slightly
narrower than long f>2. 1 lie til OH US.

58. S. COStalis n. sp. — Form very robust. l'ubescen(;e line, close, semi-
erect, rather short, i)iceous-l)rown, not conspicuous. Head robust, snuiU,
twice as wide as long ; interocular surface n.ore than twice as wide as the
eye, neaily Hat, eiiually trilobed by the very distinct sukations, lobes (Mjually
mid evenly <'onvex ; punctures fine, very even and close, finer in the uiiddlu;
ocular lines meeting at ont> length in advance; antennae slightly longer
than the width of head, slender, club lai'ge, piceous-l)lack ; third Joint some-
wliat mort* than one-third aa long again as the fourtli, fourth and (ii'th sub-
ci|nal, joints six, seven, and eight sub-equal in lengtli, the latter oval in
outline, joints of club robust, last two slightly wider than the ninth, last
joint but slightly longer than wide; maxillary paljii long, piceous-black.
Prothorax robust, widest distinctly before the iniildle, where it is nearly five-
sixths as wide as the head, and slightly broader than long ; sides thence
moderately convergent jiosteriorly and rather strongly sinuate ; anterior
niaigin sliorter and much more arcuate than tlu^ postei'ior ; surface strongly
swollen along the sides anil at the edges of the canaliculation, giving the
apjiearance of four longitudinal ribs, strongly and transverstdy impressed
just beliind the anterior n\argin ; liuely, very closely, evenly, though veiy
confusedly and roughly sculptured ; canaliculation distinct, deeply impressed,
terminating at ('(jual distances from the margins, two-thirds as long as the
jironotum. Elytra at base much wider than the head ; sides very feebly
ilivergent posteriorly, just perceptibly longer than the width at base, dis-
tinctly arcuate ; together broadly, rather strongly, ami triangularly emargi-
iiate behind ; suture onc^-half as long again as the pronotum ; surface ratlier
bi'oadly and strongly impressed on the suture at the base, vt'ry finely, ex-
ceedingly closely and irregularly sculptured ; punctures almost entirely
coalescent in very long and devious channels, with occasional spots where
tliey are confusedly broken up; they generally j)ursue a longitudinal or
obli(iue direction. Abdominal segments very broad, rapidly and ariMiately
diminishing in width, first nearly as wide as the contiguous elytra; surface
shilling, feebly convex, rather finely punctulate, more finely so behind;
transverse carinae tricuspid, ndddhi cusps short and tapering, lateral broad
and somewliat rudimentary. Legs rather short and slender, piceous-black ;
first joint of the posterior tarsi three-lifths as long again as the second, as

m

<H NOnril AMKIIICAV

long ftK tlir last, JiiintH two to lour iiniforinly ami ratliiT raiiiiliy (Iccrcnsiiig
ill Iciintli.

Mulv. — Kiftli ventral Hcjjiiii'iit iii>l im-nHiirnlily iiioilifltMl ; Hixtli Hcj,'ini'iit
f*iiiiiftti< at (ipi'x, Himis ax widf uh tin' upict-H, and of fiiuHl eiirvatnrc, di'itp,
two and ont'-h.'ilf tiiiicH as widi- as deep, cvonly voundiiiK at the Imtloin ;
Hi'Vfiitli scfiiiii'iit fvi'iiiy and t'l-cldy ttniaininati! at tin- ti|i, wliicli is lliickly
liristling witli sliort, coarsf, sftai-.

/•'iiiiiilf. — Sixth scgiiiciit ratlii'i' narrow, evenly rounded hidiiiid.

I^eiigtli 3.(t-:i.l nun.

Lak«^ Tiilioe, Neviulii, I ; California, I').

Tiiis species is very nihiist, and is (lisliiif^iiislied liy its very laif^e
elytra and tlie siiijfiilar ridj^ed appeafaiiee of tlie prolliorax. 'I'iie.
sexual eliaracters .seem to vary siiglilly in dejrnfe.

59. H. iilvcolilf IIH n. sji. — Form ndiiist. PulH-seeiieo rather short, closit,
snti-reeuiiilient, line, pliiinlieo-einereons. Head small, twice as wide as long ;

intei ular surface nearly Hat, slightly more than twice as wide as the e- ,

coarsely, very dosidy, and rather confusedly puni'tate, esi)ecially toward the
eyes ; longitudinal eh'vation slightly narrower- than the lateral portions,
evenly and rather strongly convex ; ocnlar lines meeting at one length in
advance; antennae longi-r thai, the width of head, l)la(d<, rather roliu.d,
club large; third joint one-third as long again as the fourth, fourth and fifth
ecjual, sixth and seviMitli shorter, e(iual in length, the latter thicker juid
oval, eighth very slightly elongated, as wi<le iis the seventh, s , lobular,
joints of club increasing r.-ipidly in length aiiil thickness, last joint l;irge,
acuniinato at tip; maxillary palpi moderate in length, piceous-ldack, llrst
joint i)ic<M)-testaceous, third joint v>;ry robust. Prothorax small, arcuately
widening to a point slightly in advance of the middle, where it is very slightly
narrower than the head, and slightly broader than long ; sides thence mode-
rately convergent posteriorly and nearly straight; anterior margin jiist per-
ceptil)ly shorter and much more ar(!nate than the jiosterior ; surface; faintly
tuberculate along the sides, feebly and transversely im])ressed just behind
the anterior margin ; extremely closely, roughly, but rather evenly luini;-
tate ; canaliculation rather broad, shallow, impressed, terminating at e(iiial
distances from tht; base and ajiex, two-thirds as long as the jtronotuni, sides
very slightl}' swollen. Elytra at base much w ider than the bead ; sides very
feebly divergent posteriorly, slightly longer than the width at base, nearly
straight; together broadly and very fetdily emarginate bidiind; suture two-
thirds as long again as the pronotum ; surface finely, deeply, very roughly,
evenly, and extremely closely punctate ; punctures seldom coalescent ; lustre-
less. Abdominal segments decreasing uniformly and ra])idly in width, first
just perceptibly narrower than the contiguous elytra ; surface rather fe(d)ly
convex, Unely, evenly, and rather closely punctulate ; transverse carinae
tricuspid, middle cusps rather short and finely acuminate at tip, lateral
merely a confused proje'^tioi., very broad, and often enclosing a large i)unc-
ture. Legs short and slen<ler, femora and tibiae black above, piceous-black
beneath, tarsi piceous-black ; first joint of posterior tarsi scarcely one-half

' H

COI.KOI'TKI \.

70

an loll); afjniii ns tlio second, nn lonj,' as tlu^ liftli, JoliitH twii to four iiiiitoniily
anil very jirailiially diHiriMiHing in length. Jlody winged.

Aliilv, — I'nknown.

Fiiiiiilf, — Sixth ventral se^jnient rather narrow, romiil>'(l lii-hiiid, just jier-
ceptilily and ohinsely i)r()diired hehiiid in the niiddlu.

Length -.<i nun.

Lake 'riilioc, Nevudii, I.

I

M

(W. N. <'lli|>tif'llH n. s|>, — Form rohiist. rnhi'seence excesnivi'Iy short,
rather sparse, iMect, ]ii<'eo-|i|uniliens, very in(c(ns[(icuouH. Head rather
small, very rohust, much lesH than twice as wichi m long ; ititerocular surtaue
distinctly more than three finn'S as wide as the eye, nearly tiat ; lon!,'itn<linal
elevation slif^htly wider than the latiTal jiortioiiH, evenly and rather stronely
convex, rising slightly ahove the level of the eye ; jJunctureH coarse, rather
close, eveidy distrihuted ; ocular lines meeting at two lengths in ailvance;
eyes very narrow ; antennae as long ; s the width of head, Idack, rather
slender, elnh nioderati" ; third joint almiiitiy narrower Jit the hiise. one-third
longer than the fourth, fourth and lifth eiiiial, sixth slightly longer than the
seventh, more slender, eighth slightly shorter, as wide as the si'Venth, club
compact, joints increasing gradually in length, tenth widest; maxillary jialpi
Well developed, black, lirst joint very slightly i)aler, piceo-testaceons. Pro-
thorax very robust, widttst just before the middle, where it is nearly as wide
as tin? head, and as wide as long; si(b's thence rather rai)idly conveigent
posteriorly and very feidily sinuate • anterior and posterior margins e(|ual
in length, the former slightly the more arcuate; surface rather acutely ami
longitudinally ridged at a short distance from the canaliculation, margins
of canaliculation elevated; transversely impressed immediately behind the
apex ; i)unctures small, variform, very closely compacteil, irregularly p(dy-
gonal, interspaces acute; I'analiculation ratluu' deeply impressed, terminat-
ing at distances from the base and ajiex ennal in length to one-eighth of the
pronotum, nearly equal in width throughout, bottom punctate. Elytra at
base much wider than the head ; siiU^s distinctly divergcmt posteriorly, longer
than th(! width at base, feebly arcuate ; together roundly and rather strongly
emarginate in the middle half behind : suture one-half longer than the pro-
notum ; surface? impressed feebly along the suturi;, uwvi; broadly so at base,
longitiutinally and feebly impressed near tlie humeri : sculpture feeble and
very irregular ; m-ar the borders of the sulural inijiression the punctures are
very small, feeble, distant, and isolated, interspaces nearly Hat and very
highly polished ; between this and the sides the sculpture consists of a con-
fused network of channels, '• ith tin; interspaces acute ; near the liumtMi the
punctures are distinct and very close, with the interspaces narrow and feebly
lustrous. Abdominal segments decreasing uniforndy and rapidly in width,
first distinctly narrower than the contiguous elytra : surface feebly convex,
closely, evenly, and coarsely jiunctulate, interspaces polisiied ; transverse
carinae tricuspid, middle cusps long, rather finely acuminate, prominent,
lateral much shorter, broad, r.nd very indefinite. Legs rather short and
slender, piceous-black, femora distinctly fuscous beneath toward the base;
first joint of the posterior tarsi two-thirds longer than the second, as long as

I

V-'

1*11

80

NORTH AAU'.IUCAN

tlic lost, longer tljaii tlji' next two together, fourth joint narrow, very obliquo
and tliin.

M(ih\ — Posterior edge of the liftli ventral segment very feebly eniarginate
in its middle sixth, (niiargination evenly I'ounded and scarcely measiiralile,
edge of emargination gr;iniilose; sixth segment sinuate at apex, sinus nar-
rower than the ajiiees and more acutely rounchMl, evenly round<'d at the
bottom, one-half wi(h)r than (h'cp ; seventh very feebly emurginato at apux.

FciiKilc. — I 'n known.

Length 3.(1 mm.

Ciilif'oriiiii, 1.

'I'liis very distinct species diU'crs markedly from costalls in the
structure of tlie licad, and the nature of tln^ pimcliiatioii of tlu; iiiter-
o(!iih>r surface, wiiicli is very iiiucii coarser than in tliat species ; tliere
are also many other minor differences.

61. S. adelops n. sp. — Form r(d)ust. f'ubescence very short, line,
somewhat close, evenly ilistributeil, sub-recumbent, piceo-i)lunibeous, not
conspicuous ; on the under surface of the abdomen it is more plentiful,
short, and cinereous. Head very small, twice as wide as long; iiiterocular
surface Hat, three times as wide as the eye, equally trilobcd by the rounded,
rather d<M'p, and <'ons))icuous sulcations ; jiunutiu'es very small, round, veiy
close, and evenly distributed ; ocular lines meeting at more than two lengths
in advance ; antennae rather short, ' ' ^ck, slightly longer than the width of
heail, very robust, cluli prominent ; thinl joint one-fourth longer than the
fourth, fourth and fifth eijual, sixth an<l seventh ab-ujitly much sluu'ter,
e(iiial in length, tlie latter sliglitly thicker, eighth slightly elongated, thicker
than the seventh, nearly evenly elliptical, club ratlier compact, joints in-
creasing rapidly in lengtli, tenth wider than long and l)roadest, last as 'ong
a^ the eighth and ninth together; maxillary palpi intense black tliroughout,
rather slun't ami robust, third joint densely clothed with cinereous j)ubes-
cence. Prothorax widest in the middle, wliere it is nearly seven-eigliths as
wide as the head, and slightly narrower than long ; sides thence extrenudy
feebly convergent posteriorly and nearly straight; anterior margin shorter
and much more arcuate than the posterior ; surface rather strongly tubercu-
late along the sides and abov<', and also along th»> margins of the canalieu-
lation ; transversely and rather strongly impressed just behind the apex ;
punctures very line, closely crowded, and rather obscure ; between the
tuberc'iliform costae and in the canalicuh'tion the punctures are more dis-
tant, with the intersi)aces very feebly lustrous, elsewhere nearly opn(iue ;
canaliculation nai row, fusiform, two-thiids as long as the pronotum, termi-
nating at ('(pial dista.ices from tb.e base and apex, rather deeply iuiiuessed.
Elytra at base one-thinl wider than the liead ; sid<!S just percej)til)ly diver-
gent posteriorly, longer than the width at base, very feebly and nearl; evenly
arcuate; together feebly emarginate behind; sutur(^ one-half longer than
the iironotiiui ; surface nearly as in cm^tiiUs, though rathe/ more f ebly sfulp-
tured. Abdominal segments uniforndy and very rapidly decreasing in width,
first just visibly narrowt^r than tlie contiguous elytra ; surface feebly convex,
rather finely, feebly, and closely punctulate : transverse carinae tricuspid,

COLEOPTKRA.

81

iiiiddle onsps as l)roa(l at basf as loii^, ra|)i(lly ami latlier finely aciiniiiiati',
lateral nearly as long, lirtiad, and eonfiised. Legs moderate! in length and
veiy slender, black tliiciughont ; lirst fonr joints of the posteiior tM'si decreas-
ing very uniforndy and gradually in length, lirst scarcely one-third longer
tlian the second, two-thirds as long as the last.

Male. — Unknown.

FtiiKil)'. — Sixth ventral segment aeuti'ly rounded behind.

Lengtli o.d mm.

Nortliern Califoriiin, 1.

Tliis sixic'ics greatly rcsenihlcs ro.sfdiis, and diircrs from it in the
structure of the protlioi'ux, it being nuich more cylindrical than in
tliat s[)ecies and proportionally very mncii narrower; it ahso differs
notably in the length ol' tiie antennae and [)roportional lengtlis of the
joints, and in tiie nuich more |)l(!ntifnl and conspicuous einereouj^
pubescence of the under surface of tiie abdomen. The gcMieral form
is more slender, and the elytia are long(;r in proportion to their widtii
than in costa/is.

ti2. S. lllctllOSIlS n. sp. — Form voliust. PiihcKcence very short, rather
sparse, recumbent, line, plumbeous. Head small, but robust, not twice as
wide as long; intevocular surface Hat, nc'arly three times as widt* as the <iye,
unequally trilobed by the moderately conspicuous sulcations ; intermeiliate
surface ratiier strongly and evenly convex, somewhat prominent ; punctures
rather coarse, close, evenly distriliuted, except in the sulcations, where they
are more crowded ; oi'ular lines meeting at slightly more than two Ujiigtiis in
advance; antennae much longer than tiie width of head, black, slender, club
iiiO(l<'rate ; third Joint (ui'i-third as long again as the tbuitii, fourth and fifth
e(jual, sixth and seventh ecjual in length, the latter thicker, eighth cordate,
slightly longer than wide, joii'ts of club all robust, increasing in length, last
joint feebly acutninate at tip; maxillary palpi long, piceous-black, first joint
dark tt\staceous. Prothorax widest at the middle, where it is four-lifths as
wide as the head, and very slightly narrower than long; sides thence mode-
rately convergent posteriorly and slightly sinuate ; anterior and jiosterior
margins equal in length, the former rather feebly arcuate, the latter almost
straight ; ; urface very faintly uneven ; finely, closely, and etvuily juinttate;
jiunctures sub-variolate and gtMierally irregularly j)ol3'gonal ; canaliculation
obscurely outlined, shallow, narrow, beginning before the middle, one-half as
long as the i)ronotum. Elytra at base distinctly wider than the head; sides
very f.'ebly divergent posteriorly, much longer than the width at i>ase, very
feebly arci ate, more strongly so posteriorly ; together ratlier narrowly, sub-
triangularly, HI ^. somewhat strongly emarginate behind ; suture about one-
lialf as long again .as tlie pronotum ; surface very feelily imjiressed along the
suture, and somewhat strongly, unevenly, and longitmlinally impressed in
the middle of each elytron toward the base, finely, (dosely, somewliat un-
evenly punctured ; punctures isolated near the suturii and the base, inter-
sjjaces Hat and minutely reticulated ; coalescent, and closely crowded in the
impressed portions. Abdominal segments decreasing uniformly and rapidly
Ste.nini. Ij

1^ '!.

82

NORTH AMEKICAN

in width, first distinctly narrowcv than the contignons elytra; surface fcchly
convex, coarsely, very closely, and evenly jmnctnlate ; transverse carinae
trifusi)iil, niiildle ciisjts Ion;,', heconiing linely aciciilar at tiji-, lateral l)r(>ad,
short, widening at ajx'X. Legs moderately long and slt-nder. Mack al><)ve,
piceouH-black beneath; lirst joint of the posterior tarsi twi<'e as long as the
second, as long as the fifth, second and third sub-tujual, fourth short and
obli(ine, fifth V(>ry slender.

Mule. — Posterior edge of the fifth ventral segment feebly eniarginato in its
middle fourth, eniargination evenly rounded, twelve to fifteen times as wide
as deej), ('(Uitiguous surfaci! feebly and cylindrically impressed throughout
anteriorly; sixtli si'gnient sinuate at ai)i'X, sinus small, equal in width to
the vertices, somewhat more acute in curvature at bottom, about twice as
wide as deep.

Female. — Sixth segment rounded leliind.

Length 2. It mm.

Caliibrnia, 2
Cohuiibia, 1.

Lake Talioe, Nevada, 3 ; T.akc Qiiesnel, British

Subdivision B-
(iroup III.

The di^tinjTiii,*lnng feature of tliis small group is the minute size of
the species, which ent'T it, tliej iiaving 2 mm. as a maximum limit
of leugtli. It nuiy be considered nunatural to constitute a grcjup upon
the ([luility of size alone, but as this serves to identity tliem readily,
it is adopted for convenience.

The following table shows the arrangement assumed for our three
species : —

Transverse carinae of abdomen not cusped.

Head as wide as the elytra. Lake Superior to Massachusetts.

Ii3. piisio.
Head narrower than the elytra ; uku'c rol)UHt ; elytra relatively longei' and

more n^ctangular. British Columbia (14. nailllllls.

Transverse carinae tricusjiid : form much nwvc slender. ..(1.5. atoiliai'ills.

<J3. §. iiusio n. sp. (Schwarz MS.). — Form robust. I'ubescence short,
fine, sparse, setiform, cinereous. Head robust, twic(i as wide as long; inter-
ocular surface nearly Hat, more than twice as wide as the eye, somewhat
finely, very closely, and evenly jmnctate ; punctures closely crowdeil, slightly
polygonal in outline ; longitudinal elevation narrower than tin; lateral por-
tions, strongly an<l evenly convex, promintuit ; ocular lines nu>eting at one
length in advance ; antennae scarcely as long as the width of head, rather
robust, piceous-black, club i)rominent ; tliird Joint one-fourth as lonj,: again
as the fourth, joints three to five uniformly decreasing in length, s'x and
seven oval, eighth globular, narrowei' than the seventh, joints nine a'ld ti>n
broader than long, last as wide as long, feebly acuminate ; maxillary palpi

1

COLEOPTERA.

H3

jiiccous, translucent, first joint and liasn of the second rufo-testaceous. Pro-
thorax robust, widest at tlie middle, where it is four-iifths as wide as tlie
liead, and sliphtly broader than long; sides tlitnice rather stronjrly conver-
gent j)osteri(irly and feebly sinuate; anterior niai'giii slightly lunger and
more arcuate than the posttM'ior ; surface slightly and obliijuely undulated
at the sides above, rather coarsely, veiy closely, somewhat irrt^gularly and
variolattdy punctate : canaliuulation almost entirely absent, only faintly
seen as a feeble erosion at the middle, and close to tln^ base. Elytra at base
as wide as the head, sides moderately divergent posteriorly, very slightly
longer than the width at base, almost straight ; together very broadly, tri-
angularly and moderately eni.irginate jMisteriorly ; suture nearly one-fourth
as long again as the pronotum ; surface nearly evenly and moderately con-
vex, somewhat coarsely, very closely, rather deeply, and evenly punctate.
Abdominal segments decreasing arcuatidy in width, first as wide as the con-
tiguous elytra ; surface fetddy convex, coarsely and very (dosely puncuilate ;
transverse carinae not ousped, finely and unevenly undulated. Legs shoi-t
and stout, dark jiiceous-bro^t-n aliove, paler and rufo-jiii.'eous beneath ; first
joint of posterior tarsi four-fifths as long again as the second, as long as the
last, second very slightly longer than the third.

Mule. — I'ostiM'ior edg<' of the fifth ventral segment entire ; sixth segment
broadly bilobed at ajiex, cusp very slightly rounded an<l viu'v short, arms
widely diverging.

Female. — Sixth ventral segment broadly truncate at tip, truncation slightly
arcuate.

Lengtli 1.8-1.0 nnn.

Cambridge, Massacliiiscifs, (i ; Canada, 2; Lake Superior, 2.

Tile parasite of tliis sju'cies is very large, being nearly as large as
the eye ; its eontour is nearly circular ; the surface is very convex
and most higidy polislied ; it is i)ale rut'o-testaceous in color, and the
abdomen is provided with very long cinereous setae, which project as
a fringe far behind tiie body; two symmetrically placed, pigmental
dc|iosits, situated near the anterior border, are presumably the eyes.
Tlie type specimen iieai's two of thes(^ huge jiarasites, whicli, if we
should magnify the beetle to the si/e of tlie human body, would be
six inches long.

This small species has a very wide range in its geographical distri-
bution ; it appears to be (piile rare, however, in all its localities. It
varies in the color of the jialpi and length of the first joint of the
posterior tarsi, so that 1 at first described the specimen from Canada
and Lake (Superior as distinct sjiecies, but afterwards concluded to
unite them, because of the insullicient material lit hand.

ti4. S. Iiaiiullis n. sp. — Form moderately robust. Pubescence sparse,
fine, moderately long, semi-erect, pale rtavo-testaceous. Head moderate,
robust, scarcely twit'e as wide as long ; interocular surface feebly convex,

Ml

ii

;nl!^ ilH

hailfM

Hi

NOKTII AMKKKAN

twice as wide as tlie t'.v<', ('(lually trilolicd by tlic vury feeble suleatioiis :
inteiinefliate Hiirfaee very acutely and stroiij;ly convex ; punctures .small,
close, isojateil, evenly distributed ; ocular lines meeting at less tlian one
length in advance; antennae shorter than the width of head, ratlier r(d)ust,
black, club distinct ; third and fourth joints ecpial, fifth and sixth shorter,
equal, eighth but very slightly shorter and rather less robust than the
seventh, joints of club dark jiiceous-brown, increasing rajiidly in length and
tliickness, very sparsely pubescent ; maxillary palj)! moderate, piceous-black,
lirst joint dark i)iceo-testaceous, third somewhat robust, compressed. Pro-
thorax very robust, arcuati ly and very raiiidly widening to the middle, where
it is live-sixths as wide as tlie bead, and distinctly wider than long; sides
thence rather rapidly convergent and very feebly arcuate ; anterior and
jiosterior margins nearly e(iual in length and curvature; surface very fe(d)ly
and obli(iuely tnberculate near the basal angles, just j)erceptibly and trans-
versely impressed immediately beiiind the anterior margin ; very liuely,
rather fe(d)ly, very closely, evenly, hut somewhat confusedly punctate, inter-
spaces very indistinctly granulate. Elytra at base very slightly wider than
the ln'ad ; sides feebly divergent j)osteriorly, distinctly longer than the width
at base, and feebly <ircuate ; together rather narrowly, roundly, and dis-
tinctly emarginate behind ; suture one-thiid as long again as the proiiotiim ;
surface rather dejiressed and even ; modeiately coarsely, V(My closely, deeply,
and evenly luinctate, interspaces narrow and highly polished, very fetd)ly
reticulati'd. Abdominal segnients decreasing ra))idly and slightly ariuately
in widtii, lirst as wide as the contiguous elytra ; surfaci' broad, feebly convex ;
coarsely, very closely, and evenly punctulate, becoming much more finely so
toward the tip ; transverse carinae not ciisjied, finely and acutely (tentate,
inttM'vals evenly rounded. Legs short, slender, black above, dark jiiceous-
brown beneath : first joint of jxistevior tarsi four-lii'ths as long again as the
second, eipial in length to tlie fifth, second, third, and fourth joints uniformly
and gradually decreasing in length. Under surface of the abdomen j)olished,
black, rather sparsely and somewhat coarsely punctulate.

Male. — Fifth ventral segment not perceptibly modilicd ; sixth sinuate at
the tip, sinus occupying nearly the entire segmental apex, evenly rounded,
and about eight time!-: as wide as deep.

luiimlc. — IJ nk nown .

Length 1.9 mm.

British Coliimbiii, 2.

Tiic observutioii oonccriiinn; tlie sexual modifiention of the si.xtli
ventral sejinient is ojien to a little doubt, owing to the diiniaged con-
dition of the type speeiinen.

6r». S. atOIIiarillN n. sp. — Form slender. Pubescence almost completely
invisible, except toward the borders and tip of tlie abdomen, where it is
exceedingly short, setiform, sub-recumbent, cinereous, and rather sjiarse.
Head moderate, twice as wide as long ; int(^rocular surface iiottwice as wide
as tlie eye, flat ; eciually trilobed by the very indistinct sulcations ; jjunctures
coarse, deep, very closely approximate, evenly distributed ; ocular lines
meeting at less tlian one length in advance ; antennae very slightly longe

COI.KOl'TKUA.

85

than the wiilth of licail, tilai^k, sIcikIit, cliili disliiicf ; joints tlircc, four, and
five (li'dfasinj; very uiiif'ornily in l('u;,'tli, luit with cxci'ssivc slowni'ss, sixtli
and seventh ahniptly shorter, equal in hMij,'tli, the Ijltter much thicker,
ei<;litli sli^;litly hroader than hinj;, last joint as lonj; as tiie ninth and tenth
toi^ether, much thicker; maxillary [lalpi rather short and slender, dark red-
dish-lilai k throughout. Prothorax widest at the miildle, wliere it is three-
f'ourtlis as wiih' as t!ie head, and very sliu'htly narrower than long ; sides
thence moderattdy converj^ent jiosteriorly and nearly straijrht ; anterior mar-
gin sli}{htly short((r and more arcuate than the jiosterior ; surface nearly
evenly convex, finely, deeply, very closely, evenly, hut somewhat confusedly
punctate, interspaces distin(ftly granulate; canaliculation (\\treniely narrow
and indistini't, hegiuning at the middle and extending nearly to the hase.
Elytra at base? as wid(i a.s the head ; sides very feehly divergent posteriorly,
very slightly longer than the width at hase, very feehly arcuate; broadly
and somewhat feehly emarginate hehind ; sutur(! just perce]itihly longer
than the pronotum ; surfaces evtaily and mod<M-ately convex, rather coarsely,
very closely, and somewhat confusedly punctate, int<!rspaces coarstdy granu-
late. First three ahdominal segn\ents suh-e(nial in width, as wide as the
contiguous elytra ; surface* not strongly convex, closely, evenly, and coarsely
punctulate ; transverse carinae unicnsi)id, cnsp very long, strong, becoming
fincdy acuminate ; tliere are als() slight traces of lateral, ruilimentary cusjis
on souieof the segments. Legs moilerate in length and rathei' slender, dark
rufous above, i)aler beneath, tarsi darker; first joint of the posterior tarsi
f>ne-half as long again as the second, three-fifths as long as the last, joints
two to f(iur uniformly and very gr;idually decieasing in length.

Mull'. — Posterior edge of the fifth ventral segment very feebly etnarginate
in its mi(hlle fourth, eniargination evenly rounded and just perceptible,
contiguous surface feebly fiattened ; sixtli segment sinuate at apex, sinus as
broad as the apices and equal to them in curvature, evenly rounded, some-
what more than three times as wide as deep.

Fvmttlfi. — Sixth segment evenly rounded behind.

Length 1.7 mm.

Detroit, ]\Iicliip:an, 1 ; Cainbriiljxc ^lii.asaclmsctts, l.T.
TIk! slender jTraeel'iil form of tliis species, tlio most minute of llic
genus, will retulily distinguish it from the two preceding ones.

Subdivision y.

Prothorax not canali(uilated. Elytral sculpture as in subdivision |3.

In order to tell whether the jtrotliorax is caualiculated or not, the
insect should be held in such u way that the light may pass very
obliipiely or tangentially across the highest point of the pronotum,
and perpendicularly to tlie longitudinal axis. If there be a deeply
impressed or excavated channel, it will, of cotuse, be evident without
this test, but if, when held in the position above described, there lu*
no sign of even a narrow longitudinal shade, the pronotum will be

'•'m

:>it

■ !

1 ' '■

y.
} ■

' -A

> '■

iii,i

k m

Wj;

\n i|i||

HI

\i
m

.1,-

80 NORTH AMERICAN

considered not eiitijilienliited ; on tlie, contniry, lio\V(^ver, it" tliere be a
t'jiint siiiidow extending:; aloii;^ the middle o\' the disli, giving ii decided
suspicion of n I'eehle iinfu'ession in tliiit direction, the student should
consult the tables given under subdivision )3.

This minuteness of detail is rendered necessary, for the reason that
there is no natin-al tlivision of species according to this character, and
forms gradually blend from one subdivision into the other, although
tlie character is nearly constant in individuals of the same species.

The following tabular arrangement may be ado[>te<l at present : —

Ti'jinsviTsc caiiiiac of al)il(iiiii'ii 4-(_-iisi)iil.

Klslral suture in Iciigtli t'i|iial to nr shorter tlian the pronotuiu.
Large species, 4.0 uiiii. in len;,'tli.

First joint of the jiosterior tarsi one-tliird longer than the secoiiil.

(i(i. virgin iae.
First joint of tlie posterior tarsi tlirei'-l'ourtlis longer tlian tlie seeond.

(IT. texaniis.

STiialt si)eeies, 2.S nnn. in lens^tli fi8. veilUstlls.

Klytral suture longer than the jirountuni.

.•\l)(loniinal segments as broad as tlm contiguous elytra; sides jtarallel

and continuous with tiiose of the elytra (il). OCCideiltillis.

Abdominal segments narrower tlian tlie contiguous elytra ; siiles more
or less convergent posteriorly.
Pubescence of abdomen long, fine, sparse, and recumbent, rather
conspicuous ; surface of elytra very irregularly and conspicuously

channeled 7ll. pacific IIS.

Pulx'scence finer, shorter, not at all prominent.

Sides of pruthorax undulated anteriorly 71. obntl'lisiis.

Si<les of prothorax more or less strongly and evenly arcuate ante-
riorly.
' Longitudinal elevation of interocular surface distinct, somewhat
conspicuous.
Larger species, 3.4 mm. in length ; head small.

Prothorax widest distinctly in advance of thii mi(hlle. Ariz(Hia.

72. arizoiiae.
Prothorax widest slightly behind the middle. Massachusetts.

73. iiitcgei*.

Smaller species, 2.8 ram. Head barge. Florida.

74. floridaiiiis.

Longitudinal elevation of interocular surface almost obsoli-te,

broadly and very feebly convex 75. COloilllH.

Transverse carinae of abdomen tricuspid.

Elytral suture in length eiiual to or shorter than the pronotuni ; head
much wider than the idytra.
Antcnnal joints three, four, and five nniformly decreasing in length ;

legs ])alu 70. iiiaiiiiiiopa.

Antcnnal joints four and live equal in leugth ; form more rot>ust and
more convex ; punctuation much coarser, deeper, and more distinct ;
legs almost black 77. gravidlis.

rOLKOl'TERA.

87

Klytral suture much longer than the pi'onotum ; hoail iiiiU'h iiarrowiT.

I'i'othorax distiiiittly huigt'i' than wUh' 7>. a llillliltim.

Prnthovax as wide as h)nij ; sides very strongly and nearly evenly

areiiate 7!'. tiiiitiicollif;.

Transverse earinae of ali(loni(;n not cusped.

Prothorax liaving throughout its basal lialC a narrow, (devaled, longitu-
dinal carina. Laki' Superior 80. csiriiiil'ollis.

Prothorax without carina. Colorado 81. iiisigiiis.

(in. S. VirgilliaD n.sp. — Form ratine- robust, sides parallel. Pubescence
rather long, coarse, uuxlerately abundant, semi-erect, pale I'ulvous on the
abdomen, cinereous on the remainder of thc^ upper surface. Head rol)Ust,
leather large, twice as wide as long ; interocular surface distinctly depressed,
bari'ly twice as with; as the eye; e<jually trilobed by the sulcations. which
ar(( rather deeji and prominent; intermediate surface evenly and strongly
convex: punctures deep, round, evenly disti'ibuti'd and moderately close;
inti'rs[)aces nearly one-half as wide as the jiunctures, somewhat coiivex, liutdy
reticulated and feebly lustrous ; ocular lines meeting at one and one-half
lengths in advance ; second joint of antennae longer and mon? slender than
the llrst; maxillary palpi slender, third joint piceous-black, densely clothed
with short cinereous pubescence, scarcely longer than the second, first and
second joints v(>ry dark piceo-testaceous, paler at their distal extremities.
Prothorax large, widest slightly befon' the mi(hUe, where it is more than
live-sixths as wide as tlie head, and one-sixth narrower tlian long: sides
thence very moderately convergent jxisteriorly and strongly- sinuate ; anterior
nuu'gin slightly longer and more arcuate than the posterior ; surface strongly
tubereiilate at a short distance from each basal ang'.e ; rather finely, deei)ly,
very closely, and extremely confusedly punctate, inters})aces very fe(dily
lustrous. Elytra at base slightly nari(.wer than the head ; sides very
strongly divergent jiosteriorly, as hnig as the width at base, very strongly
and evenly aii'uate : togetiier very broadly, roundly, and strongly emargi-
nate behind ; suture e<[ual in length to the i)roiiotum ; surface convex, feebly
iinpr-'ssed on the suture at the base, somewhat coarsidy and closely, deeply,
and very irregularly punctured and channeled ; interspaces minutely graj.'u-
lose or scabrous, very feebly lustrous. Abdominal segments decreasing
uniforndy and just jierceiitihly in widtli, first distinctly narrower than the
<'ontiguous elytra ; surfac<? coarsely, feelily, sul)-vai'iolately iiunctulale, puiu;-
tures very close toward the borders, less crowded toward the median line,
interspaces shining ; transverse carinae arcuate post<'riorly, 4-cuspid. cusps
all small, coarsely acuminate, sonunvhat rudimentary. Legs moderate,
slender, piceous-ljlack above, dark jiiceo-fuscous beneath and toward the
tips of the tibiae, tarsi slender; first joint of the posterior tarsi scarctdy
more than one-third longer than the second, slightly shorter than the fifth,
second somewhat shorter than the third and fourth together.

Mule. — Unknown.

Female. — Sixth ventral segment very broad and evenly rounded InOiind.

Length 4.1) mra.

Pennington Gup, Virginia, 1.

4

«K

NORTH AMKRICAV

This (iiif species is very (iistinct by rciisoii of tlie iieculijir elytral
.struclure ; tlie coarse piiheseeiief! mid ;;eneriilly seal'ioiis appeanince,
recall very forcibly tlic; sti'iietiire of uti/f/inis Say.

U7. S. tcxaillls n. sj>. — Foiin robust, sides pjiialli'l. I'libi'sci'iicf iiioili'-
riilfiy i<iiij;, spaise, coai'se, st'ini-erect, pjili' fiilvo- uuercous. Head iiiinliTiitc,
twice as -wide as loiij^ ; interoiMilar surface ratlu!r depresscil, u(it twic(v as
wide as th(? eye, equally trilolied iiy the rounded sulcations; intermediate
surface UKxlerately convex, punctures coarse, isolated, ev(>nly distriliuted,
close; ocular lines meetiiij,' at aliout two-tliirils of a length in advance;
second joint of antennae distinctly shorter and narrower than the first, third
oMe-lialf as Ion?; ;ii;ain as tlie second, all piceous-lirowii. Prothorax uniformly
and arcuately wideniuf; to a point two-thirds of thi' lent,'tli posteriorly, wlieie
it is live-sixths as wide as the head and clistinctly narrower than Ion;;;
sides thence moderately converjient, short, and distinctly sinuate; anterior
niar;,'in niiK'h shorter and very mich niort? arcuate than the jxisterioi' ; sur-
face feebly tuberculate near th(! li;isal angles, a)id very feebly swollen near
the apical angles, also very feelily and transversely imiiri'ssed just hi'hind
the anterior margin, rather finely, very closely, and extremely irregularly
punctured and channeled. Elytra at base slightly narrowei' than the head;
sides feebly divergc^it posterioi'ly, about equal in length to the widtli at base,
strongly arcuate ; together very broadly, roundly, and rather strongly emar-
giii.ite behind ; suture very slightly shorter than the jironotuni ; surfac(f very
feebly and narrowly impressed along the suture toward the base ; coarsely,
in general closidy and very irregularly punctured and channeled ; near the
suture and in front of the centre the channels are very close and outwardly
oblique, behind the centre inwardly oblitjue ; the punctures are usually
isolated by their own widths toward the outer ajiical angles, and coarser,
distinct, but polygonally compressi'cl toward the bases, interspaces jxilished.
Abdominal segments decreasing uniformly in wiiltli and with extrenu^ slow-
ness, first very slightly narrower than tin? contiguous elytra ; sides nearly
parallel ; surface moderately convex, coarsely, rather closely, and evinily
punctate; transvt^rse carinae 4cus}iid, cu;ips equal, short and rudimentary
on the first two segments, longer and more acicular on the third and fourth.
Legs rather short and slender, dark piceous-brown above, rather paler rufo-
piceous beneath; lirst joint of the posterior tarsi three-fourths as long again
as the second, very slightly shorter than the last, second joint nearly one-
half as long cagain as the third, fourth short, thin, and obliijue, tiftli much
narrower at base than at apex.

Mule. — Unknown.

Female, — Sixth ventral segment abruptly much narrower than the fifth,
evenly rounded behind.

Length 4.0 mm.

Columbus, Texas, 1 ; Western State- (locality unknown), 1.
Tiie antennae and ptilpi are missing.

This species greatly resembles vir(jitila>, but ditiers from that species
in the somewhat longer elytra, which art; much more narrowly emar-

COI.KOl'TKUA.

8i)

giiiiitc! ht'liiiid ; in its iniurli more I'obiist form, aiitl in tin* nion* sijiirse
and li'fis conspicuous piilx'sccnce.

(i8. S. veiillHtllS 11. sj). — l-'iirm slender. Piiliesceiife sliort, seini-erei't,
line, ciiicrcdiis, very sixirse, ex<'e(it ut tlie sidi's iuiil tnward the tip cit' tin-
ubiloinen, wliere it in sli;,'lit]y iimre i)leiitit'ul. Head sin.'ill l)iit rubiist,
scnrcM'ly twice as wide as lonj,' ; iiiteroeular siiit'Mee ueaily flat, very slij^litly
more tliau twice as widi^ as the eye; "(lualiy trilnlied l>y tlie ratlier teidile
longitudinal sulcations ; iiiterinediato surface very l'e(ddy and evenly (Miiivex ;
punctures extreiu(dy coarse, moderately close, dee]), rounded, and evenly
distriliuteil ; interspaces narrow, very convex, and vei'y lii^;lily jxilislied ;
ocular lines meeting; at about one and two-thirds lenjiths in advance; antennae
longer than the width of head, dark iiiceous-lirown, neai'ly black at base,
slender, club distinct; third joint one-fourth as long again as the fourth,
fourth and (Iftb eijual, seventh thicker and very slightly shorter than the
sixth, eighth distinctly elongate, oval, thicker than th(^ seventh, joints of
club increasing uiiiforinly in length, last two (Hjiial in thickness, last joint
acuminate at tip; maxillary palpi slender, dark piccons-bniwn throughnut.
Prothorax wiilest slightly behind the middle, whcic it is nearly four-lifths
as wide as tln^ head, and ;ib(iut one-sixth nairower than long ; sides tlienci)
feidily convergent jiosferiorly, sinuate ; siiles undulate throughout their
length: iinti'rioi' margin slightly shorter and much more arcuate than the
posterior; surface rather feebly and longitudinally tubeiculate near the
basal angles ; juinctiires (dose, unevenly distriliuteil. coarse, impressed,
somewhat irregular in outline; intersiiaces highly iiolished, moderately con-
vex. Elytra at base about as wide as the head; sides moderately divergent
posteriorly, slightly longer than the width at base, almost straight : together
broadly, somewhat angularly, and rather strongly eniarginate behind ; suture
ecpial in length to the pronotum ; surface somewliat depressed, fe(d)ly and
narrowly inijiressed along the suture ; outside of the sutural impressed area
the punctures are very feebly impressed, somewhat distant, nearly evenly
distributed, seldom coalescent, interspaces feebly convex and very highly
polislurd ; within the imju-essed area tlie surface is rather clostdy and con-
fusedly chamnded. Abdominal segmcnits decreasing uniformly and extremely
gradually in width, first as wide as the contiguous elytra ; surface highly
polished, moderately convex, finely and very distantly jjunctulate along the
middle, more closely so toward the borders ; transverse carinae 4-cuspid,
cusps eiiuidistant, etiual in length, long, very finely aciciilate, rather jn'omi-
nent. Legs short and slender, bla(-k, tibiae and tarsi pieeoiis-black beiu'ath ;
first joint of the posterior tarsi three-fourths as long again as the second,
very much shorter than the fifth, joints two to four uniformly and rather
rapidly decreasing in length.

Mule. — Fifth ventral segment not modified ; sixth very broad at apex,
broadly and feebly sinuate, sinus and apices about equal in width and cur
vature, sinus eight times as '^■'ide as deep.

Female. — Unknown.

Length 2.8 mm.

Locality not given ; marked 558 (Schwarz).

90

NORTH AMKItK AN

III fliis form Mic clytnil s('iil|itiir<' ditVcrs tVoiii iiiiy yd oxamiiu'd,
iiiid it ciinnol, I'ail to lie readily (lisliii;j;iii>li('d. 'I'lio eyes arc very
|ialf : till' fxplaiiaiioii ul tliis (■(iiidilioii, wliicli a|i|)oai's to lie more or
less 8|M'cilic, is somewliat obscure.

tlO. S. occideiltulis n. sp. (("rotdi MS.). — l"'<inii iiidilcriitfly nilmst ;
sides iiciiily jijiralld. l'ii))es( cncc iiiddcratcl v slmrl, rather s|i;use, liiie,
siib-iiMiiiiilieiit, sctifonii, jiiid ciiiercoiis. Head modeniti', sliglitly iiiore
tli.'in 'wife as wide (is loiif; ; interi)cuiai' siirt'aeu vi'ry feebly convex, more
tiiau twice as wide as the eye; rather lliicly, closely, aii<l evenly punctate,
punctures rounded; sulfations hroadiy rounded, t'eidile ; iiitciiuediate sur-
face broader than the lateral jiortions, evenly and nioderjitoly convex ; ocula''
lines ineetiiif^ at one leii;,'th in advance; antcunae as lonj; as the width of
head, very niodeiattdy ndmst, dark jjiceous-hidwn, hasjil joint blaik, cluh
moderate; third joint scarcidy more than one-tilth as loiif; af,'ain as the
fourth, foiirtb and tilth e()ual, sixtli and seventh shorter, ecjual in li'ni;tli,
tbe latter the more roluist, ei^'hth one-lialf loiifjer than wide, joints of club
increasing very gradually in leiigtli, the last two thicker and of eiiual width ;
maxillary palpi slender, ])iceoits-brown, slightly paler towanl tbe base.
Prothorax arcuately and gradually widening t<i a point W(dl behiml tbe
middle, where it is live-sixths as wide as tbe bead a id distinctly narrower
than long ; sides tlieiico ratber rapidly convergent posteriorly ami strongly
sinuate; anterior margin very slightly slmrter and mucb more arcuate tliau
tbe posterior ; surface liiiely, generally ( losely, and very irregularly punctate ;
punctures isolated and ciicnlar in outline near the middb', closely crowded
and transversely coab-scent near tlui base; ratber strongly and minutely
tubcrculate near the basal angles ; along the middle tow aid tbe base, there is
an arrangement of punctures somewhat resembling a canalif illation. Elytra
at base as wide as the head : sides ratber strongly divergent jiosteriorly,
sliglitly longer than the width at base, fecdily arcuate, most strongly so be-
bind ; together broadly, roundly, and distinctly emarginate hchiud ; suture
very sliglitly longer tban the proiiotum ; surface very fetdily impressed along
tbe suture toward tbe base, ratber linely, very closely, deeply, and irregu-
larly puiiftured and cbaiinided, channels generally arcuately arranged near
tbe suture, more or less convergent toward tbe inner apical angles. Abdo-
minal segments decreasing uniformly, tbongh just perceptibly, in width, lirst
very sliglitly wider tban tbe contiguous elytra ; surface very broad and feebly
convex, linely, veiy feebly, somewhat distantly anil irregularly ]iuuctulate ;
transverse carinae 4-cuspid, cii.-ips nearly eiitial in length, rather short, linely
aciculate, widely separated. Legs moderately sbort and sbiider, black
above, very dark ])ifeous-brown licneatb ; first joint of the posterior tarsi
very slightly longer tban the second, sbortiu' tban tbe last, second and third
joints sub-equal ; tarsi robust.

^f<ll(^, — Fifth abdominal segment not modified ; sixth broadly and deeply
sinuate at apex, sinus somewbat broader tban tbe apices, more acutely
rounded at tbe bottom tban at tbe sides, nearly five times as wide as deep;
seventh segment narrow at tip, wbere it is feebly and very evenly emarginate.

FtiiHilii. — Sixth ventral segment very broadly and evenly rounded behind.

Leiigtli 3.0 mm.

rOLKOI'TKRA.

01

Lako QiiesncI, Hritisli Coliiiiiliiii, 17.

This species is cliariicterized liy ii very Itroail jilMlomeii ; tlie first
joint (if tlie liiiid tarsi seems to he sii^iitiy variaide in l(ii;.'lli.

71). N. iiacinniH

sp. (Crotch MS.). — Funii inoih'i-.itcly slcinh

I'lil.

I'Mic Iciii;;, line, I'l'illiiT siiarsi' on tlic |)r(itlioi;ix anil dvtra, dcnst;

towaid tlio siili's and vcitcx of llio alHlonien, siili-i'ci'uiiiln'nt, pale llavo-
fincii'ons. Head small, t«i(!H as wiili^ as lon^' ; intcidcnhir surt'ai'i- llat,
sli;,'litly niori: tlian twice as wiiln as the eye ; ciinally trilobcil by the roundccl
lint distinct siilcati(Mis ; intcnnciliatc snrfacc evenly an<l ratliiT stroniily con-
vex ; punctures deeply impressed, distant, and rather evenly distrilinted,
slij^litly doner toward the eyes; interspaces feebly convex and very lii;;lily

ilislied

liar Ii

eti

;at

h'liat h

th

1 lenu'th

• Hnnit

antennae sliiihtly lonf,'er tlian the width of head, ]iale piceoiis-brown, lirst
joint daiker, sleniler, dill) distinct ; thir<l Joint one-third as Ion;,' a^'ain as the
fourth, fourdi and (Ifth tupial, sixth lon;:er ami niuuh less robust than the
seventh, eif;hth slii;htly more robust thau the seventh, perceiitibly elonjiated,
oval, joints of duli incicasini,' slightly in length, nearly of eijiial tliickness ;
m.ixillary palpi piccoushlack, fii'st joint dark piceo-testaeeous. Prothorax
arcliately and very gradually widening to a |)oiiit slightly behind *' • middle,
where it is live-sixths as wide as the head and one-sixth nariower than long ;
sides thence very feebly i;onvergent and ilistinctly sinuate ; anterior and
posterior margins ('(pial in length, the former slightly the more arcuate;
.surface rather coarsely, closidy, and irregularly punctate, ])uin'tures rounded,
impressed, and often conllinjnt near the margins, rather distant in the middle,
interspaces liighly polisiied. Elytra at base as wide as the head ; sides
moiierately divergent posteriorly, slightly longer than the width at base,
and rather strongly arcnatt; ; together broadly and very fecdily emarginate
bidiind ; suture; one-lifth as long again as the pronotuni ; surface convex,
just jierceptibly and narrowly impresseil along the suture toward the base,
with a very feeble impression just behind and exterior to the centi'e of each
elytron, extrenndy irregularly, confusedly, coarsely, rather idos(dy jnmctured
and channeled. Abdominal segments decreasing uniforndy and rather
gradually in width, lirst just ])erceptibly narrower than the contiguous
elytra; surface strongly coiivex, highly polished, very tnudy, distantly, .'ind
evenly punctulate ; transverse carinae 4-cusiiid, cusps equal in length, rather
short, becoming aciculate toward tips, middle ones more distant th;in the
lateral. Legs rather short and slench-r, piceous-black, un(b'r surfac(Mif tarsi
slightly paler ; first joint of posterior tarsi four-fifths as long again as the
second, slightly shorter than the last, second and third suliequal.

Mule. — Sixth ventral segment very broadly sinuate at apex, sinus nnidi
broader than the apices, and of slightly more feeble curvature, mon^ arcuately
rounded at the bottom than along the sides, from six to seven times as wide
as deep.

Famih. — Sixth segment rather broadly and unevenly rounded behind.

Length 2.t)-3.tt nun.

Lo3 Angeles, Culiloniia, 10,

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NORTH AMERICAN

The lon;^ pubescence, higlily [)olislic(l surface, and remarkably
coarse and irregular sculpture of the elytra, will at once distinguish
this species.

71. S. olistl'lisus n. sp. — Form rather shMider. Pubescence rather
short, sjjarse, soniewliat coarse, Aul)-recuiubeiit, cinereous. Head small
and I'obust, scarcely twice as wide as long ; interocular surface nearly twice
as wiile as the eye, Hat ; longitudinal snlcations very feeble ; inttM-mediate
surface slightly wider than the lateral portions, very feid)ly and (jveiily
convex, sunnnit very narrowly inii)un(tate ; punctures coarse, very closely
crowd(Ml and somewhat polygonal in outline ; ocular lines meeting at one
length in advance ; antennae much longer than the width of In-ad, basal
joint black, remainder rather pale piceous-brown, slender, club distinct;
third joint one-fourth as long again as the fourth, fourth and fifth equal,
sixth and seventh joints much shorter, equal in length, the latter nuich
more robust, clubbed, eighth sbvnrter and much more robust than the
sev(^nth, slightly broader than long, sub-triangular, joints of club nearly
eijual in width, slightly increasing in length, ninth and tenth very slightly
broader than long ; nuixillary palpi moderate, first joint rather pale piceo-
testaceous, second slightly darker, piceous-brown, third darker, nearly
piceous-black. Prothorax widest slightly before the middle, where it is
five-sixths as wide as the head and one-sixth narrower than long ; sides
thence feebly convergent posteriorly and distinctly sinuate, very slightly
convergent anteriorly and feebly sinuate : .anterior angles rounded ; anterior
margin longer than the posterior, equally arcuate ; surface distinctly and
longitudinally tuberculate near the basal angles, broadly and very feebly
swollen aliout the centre of tiie pronotum, punctures moderate in size, vari-
form-, very closcdy crowded, deep, smaller, and more crowded near the hase,
larger and more isolated near the middle; interspaces narrow, v<u'y convex,
polished. Elytra at hase as wide as the head ; sides rather feebly divergent
posteriorly, longer than the widtli at hase, rather strongly arcuate ; togc^ther
broadly, somewliat angularly and deeply emarginate behind ; suture dis-
tinctly longer than the pronotum ; surface rather feebly impressed on the
suture toward th(! base, and also near the humeral angles, rather coarsely
and feebly, closely and exceedingly ii .'egularly punctured and channeled;
interspaces narrow, very convex, and shining. Abdominal segments decreas-
ing uniformly and exceedingly gradually in wi.ith, tirst slightly narrower
than the contiguous elytra ; surface rather sparsely, finely, and evenly punc-
tulate ; transverse carinae 4-cuspid, broadly arcuate, cusps very small, equal
in length and e(juidistant, acuminate at tip, somewhat rudimentary. Legs
moderate, slender, piceous-black ; first joint of posterior tarsi equal in length
to the width of the mentum iit base.

Male. — Fifth ventral segment just perceptibly and roundly emarginate in
the middle, contiguous surface without trace of impression or fiattening ;
sixth seguient broaiUy sinuate at tip, sinus broader and more feebly rounded
tlian the apices, evenly rounde<l throughout, nearly six times as wide as deep ;
seventh narrow, transversely truncate at tip, lati.'ral setae weii developed.

FeiiKih'. — Unknown. , , ■

Length 3.1 mm. , ■

COLEOPTEKA.

98

New York, 1 ; Cape May, New Jersey, 1.

The type is in ratlier poor condition iuul laeks tlie posterior tarsi,
with exception of the first joint; tiiis I have compared witii the organ
which, in my opinion, wonhl best serve as a stamhird.

This specimen was received with Mr. Fauvel's hibel, as cinerascens
Er., and, associated witli it were numerous otlier specimens, which
proved to be sti/cficiis Say. After carefully studying Erichson's rather
short description of eiiwritsceiis, I am forced to the conclusion that
the two species are distinct, more especially from the following state-
ments which are quoted in the words of that author: —

"Antennae breviusculae, articulo tertio (piarto vix longiore, nigrae.
Paljii nigri. Elytra thorace paulo longiora, dorsoantico medio levis-
sime toroso, densius profunde punctata, interstitiis plaiiis."

The sinuation of the sides of the prothorax in front of the middle
is a character very seldom seen in the genus.

Ohstrusns somewhat resembles stygiciis Say.

72. S. avizonac n. sp. (Crotch MS.). — Form moderately robust. Pu1)ph-
oenco ratlier long, line, sonicwliat close, sub-vecumbeiit, very ]iale tl.ivo-
oiiiereous. Head robust, rather small, not twite as wide as long ; interouular
surface slightly more than twice as wide as tlie eye, nearly tlat ; equally
trilobed by the longitudinal sulcations, ^mIucIi ai'e rounded and distin(;t ;
surfaces evenly, moderately, and equally convex ; punctures soniewliat
coarse, close, rather evenly distributed, interspaces narrow, nearly fiat,
highly j)olislied ; ocular lines meeting at nearly two lengths in advance:
antenna(^ ssliglitly longer tbau the width of bead, slender, piceous-brown,
club distinct ; third and fourth joints sub equal, (iftb slightly shorter, sixth
slightly shorter than the fifth and distiiu'tly longer than the seventh, joints
three, four, and live rather abruj)tly enlarged at the distal extremities, joints
of club of nearly equal size; outer joints densely and coarsely pubescent;
maxillary i)alf)i very robust throughout, dark piceous-brown, basal joint
piceo-testaceoUH. Prothorax ('venly, gradually, and arcuately increasing in
width to a point slightly before the uiiddle, where it is (ive-sixths as wide
as the head and distinctly narrowiu- than long ; sides thence very gradually
convergent posteriorly and strongly sinuate ; anterior margin very slightly
shorter and much more arcuate than the ])osterior ; surface very feebly
tuberculate near tlm basal angles, transversely and feebly impressed just
behind the apex ; finely, closely, rather irregularly, and confusedly punc-
tate ; intersjjaces very narrow, polished. Elytra at base distinctly wider
than the head; sides rather feebly divergent posteriorly, distinctly longer
than the width at base, feebly arcuate, more strongly so toward the apicos ;
together broadly, roundly, and feebly emarginate behind ; suture more than
one-third longer than the pronotum ; surface very feebly, rather coarsely,
very closely, and extremely irregularly punctured and channeled; inter-
spaces narrow, very convex, higlily polished. Abdominal segments decreas-
ing uniformly and almost imperceptibly in width, first much narrower than

1^

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04

NORTH AMERICAN

II

tilt' fontignous elytra ; surface highly polished, finely puiictnlate ; punctures
deeply impressed, much closer toward the borders ; interspaces convex ;
transvers(* carinae arcuate heliind, 4-cuspid, middle cusps finely acicular,
lateral shorter and hroader, acuminate. Legs rather short and stout,
piceous-Mack ; first joint of the posterior tarsi nearly one-half longer than
the secon<l, second and third suh-tMjual.

Male. — Fifth ventral segment just perceptibly emarginate in the middle at
aj)ex ; sixth very broadly sinuate at apex, sinus occupying nearly tli(> entire
extent of the segmental ai)ex, more acutely rounded at the bottom than along
the sides, between five Hud six times as wide as deep.

Fiwdle. — Sixth segnu'ut narrow, broadly and evenly rounded behind.

Length 13.4-4.0 nun.

Arizona, 17; Columbus, Tvjxas, 1.

This species may be easily distinguished from incnlttis by its much
mofe robust form. The elytra in the female are relatively much
shorter than in the male, and tiu^ pronotum sometimes bears traces
of a long canaliculation. The anterior margin of the prothorax in
the type bears slight evidences of a small median sinuosity.

73. S. integer n. sp. — Form very moderately robust. Pubescence very
short, extremely sparse, semi-erect, setiform, fine, and cinereous. Head
moderate, twice as wide as long ; interocular surfaci; feebly convex, slightly
less than twice as wide as the eye; equally trilobud by the very feeble,
rounded sulcations ; intermediate surface feebly and evenly convex ; punc-
tures very coarse, deep, rounded, moderately close, more isolated in the
middle; interspaces nearly Hat, shining ; ocular lin(\s meeting at one huigtli
in advance ; eyes hemispherical ; first joint of antennae black, second dark
piceous, equal in length ; maxillary palpi dark piceons-brown, first joint
rather pale piceo-testaceons. Prothorax widest slightly behind the middle,
where it is four-fifths as wide as the head, and distinctly narrower than
long; sides thence moderately convergent posteriorly, and just perceptibly
sinuate; ant(M'ior and posterior margins nearly equal in length and curva-
ture: surface very feebly and minutely tuberculate near the basal angles,
very broadly and feebly swollen in the region about the middle of the pro-
notum, punctures rounded, deejj, variable in size, very close, and in some
portions rather lionfused. Elytra at base as wide as or just perceptibly
wider than the lieail ; sides rather feebly divergent posteriorly, longer than
the width at base, moderately arcuate; together broadly, evenly, and some-
what strongly emarginate behind; suture one-fourth as l(Uig again as the
pronotum; surface deeply impressed on the suture at the base; rather
coarsely, very closely, deeply, and very irregularly i)unctured and chan-
neled. Abdominal segments decrt^asing uniformly and very gradually in
width, first as wide as the contiguous elytra; surf .ce broadly convex, rather
coarsely and feebly punctulate ; transverse carina 4-cuspid, cusps nearly
equal in length, moderately long and finely acuminate, lateral often double,
or strongly and widely bifurcate, at other places broad and gradually becom-
ing amalgamated with the general surface of the segment. Legs moderate

t'

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COLEOPTERA. »••

In length, rather slender, pieeous-black ; fii>t joint of the posterior tarsi
short, scarcely more than one-third as long agaMi as the second, :nuch sliorter
tlian the last, joints two to fonr uniformly aiKl rather rapidly decreasing in
lenj^th.

Male. — Unknow n .

Fntuile. — Sixtli ventral segment verj evenly rounded behind throughout.

Lenj,>!i 3.4 nun.

Winchester, ]Massaehiisctls, 1.

Tlie type lacks tlie antennae, witli exception of tlie basal joints.

The species is broader and nnicli more robust, and with a much
narrower bead than those to wliicli it is more closely allied ; the
elytra are also proportionally longer.

74. S. floridaillis n. sp. — Foim rather slender. Pubescence ratlier
short, sparse, eoarst^, send-erect, cineri^ous. Head robust, distinctly less
tlian twice as wide as long ; interooular surface nearly flat, twice as wide as
the eye; longitudinal elevation narrow, feebly convex; punctures rather
coarse, very close, deep, somewhat irregular in outline ; ocular lines meeting
at one length in advance ; antennae slender, mucli longer tlian the widtli
of head, piceous-black, club slender; joints tliree, four, and live decreasing
uniformly and somewhat gradually in length, joints of club of nt-arly e(iual
thickness ; maxillary palpi long, slender, jiiceoiis-black, first joint translu-
cent, much paler, and piceo-testaceous. Prothorax 'videst sliglitly before
the middle, where it is four-fiftlis as wide as the head, and nearly one-sixth
narrow(!r than long ; anterior margin distinctly longer than the posterior,
equally arcuate; surface transversely impressed just behind tlie anterior
margin ; coarnely, closely, deeply, and irregularly punctate ; punctures
generally confusedly coalescent ; interspaces very narrow, convex, and very
liighly polished. Elytra at the base as wiile as the head ; sides very feebly
divergent posteriorly, much longer than the width at base, feebly arcuate;
together broadly, angularly, and strongly emarginate behind; suture about
one-tenth as long again as the pronotum ; surface strongly and narrowly
impressed on the suture towar<l tlie l)ase ; coarsely, deeply, very closely,
and extremely irregularly punctured and channeled, cliannels generally
perpendicular to the sutnre in the impressed area, and convergent loward
the inner apical angles behind ; jnmctures occasionally isolated along the
borders of the impressed area. Abdominal segments decreasing very uni-
formly and gradually in width, first somewhat narrower than the contiguous
elytra ; surface highly polished, finely, and irregularly, but generally dis-
tantly punctulate ; punctures very sparse along the middle; tiansverse
carinae 4-cuspid, cusps moderate in length, aciculate. Legs short and
slender, piceous-black ; lirst joint of the posterior tarsi one-half as long
again as the second, as long as the second and third together, slightly
shorter than the last, joints two to four uniformly and very rapiil decreas-
ing in length.

Mule. — i'osterior edge of the fifth ventral segment just perceptibly and
roundly emarginate in its middle fourth, contiguous surface exhibiting but

<!|E . I m

I.

? ;'•'

96

NORTH AMKUICAN

slight tt'udcnpy to flattening ; sixtli sepnient very broadly sinnatw at apex,
sinus oi'cni)ying tlit* cntiro width of the segment, fi'i'hly anil evenly rounded
throughout, about twelve tiries as wide as deep.

J'luiiilf. — Unknown.

Length 2.8 inin.

('('(Uir Keys, Florithi, 1.

Tin; secoiul joint of tlic tarsus is luuisually long.

7;'). S. COloilUS Kri(di». — Form rather slender. Pubescence sparse, a
little more dense at tlu; sides and toward the vertex of the abdomtni. Head
robust, less than twice as wide as long ; interocular surface flat, distinctly
less tlian twice as wide as the eye; punctures very close, small, evenly dis-
tribiitecl ; longitudinal elevation a little bri)a<ler than the lateral jiortioiis,
feebly and evenly convex ; ocular lines meeting at two lengths in advance ;
antennae as hnig as the width of head, basal Joint black, remaii;d"r moder-
ately })ale piceous-brown, slender, club small ; third Joint two-lifths as long
again as the fourth, fourth and fifth sub-equal in length, fifth but very
slightly shorter than the third, six and sc^ven ecjual in length, the latter
thicker, eighth slightly thicker than the seventh, distinctly elongated, ovu-
late, joints of club increasing in length, last two of equal thickness ; maxil-
lary palpi rather short, first Joint an<l base of the second j)ale testac^i^ous,
remainder dark j)iceous brown. Prothorax widest slightly behind the mid-
dle, where it is five-sixths as wide as the head, and distinctly narrower than
long ; sides thence moderately convergent posteriorly and very f(!ebly sinuatt* ;
anterior margin very slightly shorter and more arcuate than the posterior ;
surface finely, very closel}', confusedly punctured; junx'tures isolated in tin'
centre, very crowded and confused toward the base. Elytra at bas(^ about
as wide as the head ; sides moderately divergent posteriorly,'longer than the
width at base, feeblv arcuate, more strongly so behind ; together broadly and
feebly emarginate Ixdiind ; suture outvsixth as long again as the pronotum :
surface rather convex, narrowly impressed along the suture, particularly
towanl the bast; ; rather coarsely, feebly, and irregularly punctate ; inter-
spaces narrow and shining; chamiels neither long nor well-marked. Abdo-
minal segments decreasing nniformly and moderately ra{)idly in width, first
very slightly narrower than the contiguous elytra ; surface rather convex,
somewhat finely an<l evenly i)unctulate ; punctures of fifth segment much
finer and closer ; transverse carinae 4-cuspid, cusps ec^ual in length, equi-
distant, rather long, and finely aciculate. Legs moderate in length, some-
what slender, piceous black above and beneath, tarsi paler; first Joint of
posterior tarsi one-half as long again as the second, much shorter than the
last, second and third sub-equal, fourth shorter, fifth gradually narrowed
toward tlie basi^

Afdie. — Fifth ventral segment not appreciably modified ; sixtli very broad
at apex, broadly sinuate, sinus very much wider and more feeble in curva-
ture than the apices, evenly rounding throughout, eigli or nine times as wide
as deep, lateral setae of sev(!uth segment absent.

Female. — Sixth segment very broadly truncate at apex, truncation feebly
arcuate and just perceptibly produced in the middle. v

Length 3.0-3.4 mm. ' .

COLEOPTEUA.

97

Tiiiko Superior (locality not specifi(!(l), 10; Capron, Florida, 5 ;
Siiiid Point, Florida, 2 ; Mid<lle States, 1 ; Southern States, 2 ; Cam-
bridge, Massaclinsetts, 1 ; Waverly, ^lassacliusetts, 1 ; Willets Point,
Long Island, 1 ; California, 1 ; Arizona, 1.

A very widely distributed species, and easily recognized. In some
specimens there is a very feeble indication of a canaliculation near
the middle of the pronotum.

The parasite of tiiis species is scarcely as long as the third joint
of the maxillary palpi, nearly circular in outline, rather strongly
convex, pale reddish-testaceous, and extremely highly polished; it is
transversely segmented at two-thirds its length posteriorly, and at
the posterior tip bears four or five short cinereous setae.

7<5. S. maniniops n. sp. — Form very moderati^ly robust, sides parallel.
Pnhosuenci! rather short, seini-ereut, line, moderately elose, uinereous. Head
large, twice as wide as long; interoeular surface twice as wide as the eye,
nearly Hat ; longitudinal elevation slightly wider than the lateral portions,
evenly and rather strongly convex ; snlcations scarctdy visil)l(!; jiunctures
variolate, rather coarse, closely crowded, nearly evenly distributed, poly-
gonal in outline ; ocular lines meeting at less than one length in advance ;
antennae slightly longer than the vidtli of head, slender, club moderate,
basal joint black, remainder rather dark piceous-brown ; third, fourth, an<l
fifth joints decreasing unifonnly and very gradually in length, sixth and
seventh sub-equal in length, the latter much the more robust, eighth as long
as the nintli, much shorter than the seventh, very robust, narrowed at base,
joints of club increasing in length, the last two equal in width and somewhat
more robust than the ninth; maxillary palpi rather pale piceous-brown,
basal joint and first third of the second nuitli paler llavo-testaceous. Pro-
thorax very large and robust, arcuately, evenly, and rather rapidly widening
to a point slightly behind the middle, where it is five-sixths as wide as the
head, and just perceptibly narrower than long ; sides thence rapidly conver-
gent and very slightly sinuate ; anterior margin slightly shorter and much
more arcuate than the posterior, the latter nearly transverse ; surface rather
strongly tuberculate near each basal angle, tuberculations very widely sepa-
rated; also transversely and very feebly impressed just behind the anterior
margin ; finely, very closely, rather feebly, and very confusedly punctate.
Elytra at base much narrower than the head, scarcely wider than the pro-
thorax ; sides strongly divergent posteriorly, as long as the width at base,
feebly and evenly arcuate ; together broadly, somewhat angularly and
rather deeply emarginate behind ; suture distinctly shorter than the prono-
tum ; surface depressed, nearly even, very roughly, evenly, closely, finely,
and confusedly punctate. Abdominal segments decreasing uniformly iu
width and with extreme slowness, first slightly wider than the contiguous
elytra ; surface coarsely, feebly, rather closely, and evenly punctulate ; be-
coming much more finely so toward the vertex ; transverse carinae tricuspid,
middle cusp strong, finely acuminate at tip, becoming much shorter on the
posterior segments, lateral short, rudimentary, and generally bifid, except on
Steniki. 7

'IB

'■4^1

m

m

m

98

NORTH AMKKICAN

the first segment, where they are longer, more slender, and slightly inclined
inward. Legs short, dark fusco-piceoua, under surface of femora fnscous
and niiu'li paler ; first joint of posterior tarsi one-half as long again as the
second, inucli shorter than the last, second niucii longer tiian the third, fourth
very small ; tarsi gradually attenuated toward tip.

Mali;. — Posterior edge of the iifth ventral segment emarginate in its mid-
dle third, emargination evenly rounded and about ten times as wide as deej),
contiguous surface feehly inij)ressed, impression becoming gradually extimit
anteriorly; sixth segment deeply sinuate at apex, sinus and apices of ecjual
curvature, the former evenly and rather acutely rounded, and about twice
as wide as deep ; seventh (svenly and rather strongly emarginate at tip.

Fi'iimle. — Sixth segment broadly and very evenly rounded behind.

Length 2.4-2.9 mm.

Cambridge, JMassacliiisett.*, 40 ; 'rrenton Fulls, New York, 4 ;
Detroit, Micliigan, G ; Batcliehwanung Bay, Lake Sujjerior, 2 ; Miclii-
picoten River, Lake Superior, 4 ; Marquette, Micliigan, 4 ; Isle
Royale, Lake Superior, 1 ; Fort Garland, Colorado, 2 ; Lake Quesnel,
British Columbia, 9.

Easily recognized by its very short elytra, large protliorax, and
very rough sculpture. As may be seen by the tbn'going list of
localities, it is very widely distributed, and I can find no perceptible
variation of any kind, even in specimens from the most widely se[)a-
rated regions.

77. S. gravidlis n. sp. — Form rather robust, sides parallel. Pubescence
very short, semi-erect, ratiier sparse, fine, dark plumbeO-cinereous. Head
large and robust, distinctly more than twice as wide as long; interocular
surface nearly Hat, twice as wide as the eye ; equally trilobed by the very
faint, rounded sulcations ; intermediate surface rather strongly and evenly
convex, rising al)f)ve the general surface ; punctures small, very close, poly-
gonal, confusedly coalesceut ; ocular lines meeting, at less than one length in
advance ; antennae distinctly shorter than the width of head, slender, club
moderate, dark piceous-brown, basal joint black ; third joint one-fourth as
long again as the fourth, fourth and tifth eijual, sixth shorter and much
more slender than the seventh, eitrhth equal in width to the seventh, sliglitly
elongated, nearly sub-globular, joints of club very gradually increasing in
length, ninth oval and intermediate in thickness between the eighth and
tenth, tenth and eleventh of equal width ; maxillary palpi moderate in
length, piceous-brown, first joint and base of the s<;co:id piceo-testaceous.
Prothorax robust, arcuately and rather rapidly widening to a point slightly
in advance of the middle, where it is three-fourths as wide as the head, and
just perceptibly narrower than long ; sides thence moderately convergent
and straight ; anterior and posterior margins sub-equal in length, the former
slightly the more arcuate; surface distinctly tuberculate near the basal
angles, tuberculations widely separated ; also transversely and rather feebly
impressed jujtt behind the anterior margin ; punctures rather small, feebly

COLEOPTEIIA.

\)d

iinju-i'sserl, cloao, very confusedly coaleacent. Elytra at base much narrower
than the head ; Hides strongly divergent posteriorly, longer than the width
a1 base and moderately arcuate ; together very broadly, roundly, and rather
strongly eniarginate behind ; suture very slightly shorter than the pnuiotunj ;
surface depressed, nearly even, rather linely, closely, roughly, and ,'ery con-
fusedly sculptureil ; channels not distinctly traceable. Abdominal segments
arcuately and just perceptibly decreasing in wi<lth, first slightly wider than
the contiguous elytra ; surface broadly and feebly convex ; very coarsely,
rather distantly and evenly ]tunctulate ; transversi^ carinae tricuspid, cu:'ps
rather long, e(iual in length, middle ones becoming linely acuminate, lateral
broad, decreasing in width toward tip, where they are narrowly truncate and
confluent with the general surface. Legs short and slender, dark blackish-
fuscous above, slightly paler beneath ; first joint of the posterior tarsi scarcidy
one-fourth as long again as the second, very much shorter than the fifth,
second much longer than the third, third and fourth of nearly ecjual length ;
the first two joint.-: are much more robust than the third and fourth ; tin- fifth
is slightly clavate.

Mule. — Fifth ventral segment scarcely modified, with the excepti(Ui of a
very faint flattening along its midillts fourth ; sixth segment broadly and
feebly bilobed at apex, cusp very feebly and narrowly roundiMl, arms nearly
straight; seventh very feebly sinuate at tip, without trace of either terminal
teeth or lateral setae.

Female. — Unknown. *

Length 3.0 nun.

Cambridge, Massachusetts, 1.

I am quite sure of the sex of the above type specimen, altliough
the cliaracters of the sixth segment as given, are rather fliose of a
female in types, the males of which are provided with very striking
sexual characters. The species is very distinct, and could not fail of
instant recognition by the unaided eye, even when among a large
number of other species, witii sole exception of the preceding form,
to which it bears an illusive resemblance. They may be distinguished
by the more robust form and coarser sculpture of gravidus, and also
by differences in the sexual characters.

" y

1

78. S. aniniatlis n. sp. — Form rather slender. Pubescence short, sub-
recumbent, rather close, fine, pale fulvo-cinereous. Head robust, scarcely
twice as wide as long; interocular surface feebly depressed, slightly more
than twice as wide as the eye ; longitudinal elevation narrower than the
lateral portions, evenly and very strongly convex, conspicuous ; punctures
rather fine, closely crowded, and oblong near the eyes, more sparse along
the median line ; ocular lines meeting at two-thirds of a length in a<lvance ;
ai'tennae as long as the width of head, slender, club small, basal joint black,
second slightly paler, remainder pale piceous-brown ; third joint one-half as
long again as the fourth, fourth and fifth equal in length, sixth and seventh
very slightly shorter, equal in length, the latter thicker and oval, eighth

111

100

NORTH AMERICAN

\

I-

1 f^

>f p

scarcely more tlian one-half as long as the seventh and soniow hat leas robust,
oval, joints of club increasing nnifornily and very gradually in length and
thickness ; maxillary palpi piceoiis-Mack, slender, first joint translucent and
dark piceo-testaceous. Prothorax widest at the middle, where it is five-sixths
as wide as tin- head and distinctly-narrower than long- sides inence feebly
convergent jxisteriorly and very feebly sinuate ; anterior margin very slightly
shorter and distinctly more arcuate than the posterior ; surface obliquely
tuberculate at the basal angles, fetdily and transverscdy iiripressed just be-
hind the anterior margin ; punctures sn\all, feeble, eonfuseiUy coalescent near
the margins, more isolated in the middle, where the interspaces are nearly
flat and minut(dy reticulated. Elytra at base as wide as the head; sides
moderately divergent posteriorly, longer than the width at base, nearly
straight, slightly sinuous ; together broadly, angularly, and somewhat
strongly emnrginate behind ; suture one-eighth as long again as the pro-
notum ; surface imj)ressed along the sutur:; toward the base; punctures
small, rounded, feebly impressed, rather close, and confusedly coalescent.
Abdominal segments decreasing uniformly and very gradually in width, first
as wide as the contiguous elytra ; surface coarsely and somewhat closely
punctulate, soinewhat more finely so j)osteriorly, and sparsely so along the
median line; transverse carinae tricuspid, middle cusps strong, finely acumi-
nate at tip, lateral distant and so rudimentary as to appear simply as broad
and very feeble protuberances. Legs short and sleiider, piceous-black above,
•lark piceo-fuscous beneath ; first joint of the poster'.oi- tarsi three-fourths as
long again as the second, longer than the last, second joint as long as the
third and fourth together, fourth very small, oblique.

Mule. — Unknown.

Female. — Sixth ventral segment broadly and evenly rounded behind.

Length 2. (J mm.

Marquette, Lake Superior, 1.

This species belonfi;s to an extremely common type of tlie genus,
and has numerous affinities with various species in tlie group with
caualicuhited pronotum ; it appears, liowever, to be distinct, as far as
tlie very limited material at hand will allow of judgment.

79. S. tlimicollis n. sp. — Form moderately slender, sides parallel.
Pubescence rather short and sparse, sub-recumbent, fine, pale flavo-cinere-
ous. Head moderate, robust, scarcely twice as wide as long ; interocular
surface tiat, more than twice as wide as the eye, equally trilobed by the very
feeble, rounded sulcations ; intermediate surface feebly and evenly convex ;
punctures rather coarse near lli« eyes, much finer along the middle, very
close, rounded in outline, not coalescent ; ocular lines meeting at nearly one
and one-half lengths in advance ; antennae equal in length to the width of
head, very robust, piceous-black, club distinct ; first two joints equal in
length and thickness, third joint one-third as long again as the fourth,
fourth and fifth equal, sixth distinctly longer and more slender than the
seventh, eighth small, sub-globular, joints of club increasing rapidly in
length, last two of equal thickness ; maxillary palpi long, piceous-black,

C'OLEOPTKUA.

101

first joint translucent and pal« pieeo-testaoeous, tliinl robust, noarly as long
an tlii> first and sroond toj^t^tlu^r. Prothorax widi'st sli},'lit!y in advance dl' thu
miildlt;, where it is five-sixtlis as widt; as tlni lu-ad, and distinctly narrower
than long ; sides thence rather rapidly convergent posteriorly and distinctly
sinuate ; anterior niar),'in slij^litly li>nj;er tiinn the i)osteri()r, ecuially arcuate ;
(surface broadly llatteiied above, feelily tuberculate near tlie liasal angles,
and broadly swollen throughout the length and breadth of the anterior half
of the ])ronotnni ; punctures rather sniall, somewhat variform, generally
Kiunded and very clos<', interspace's feidily convex, distinctly granulate and
feebly shining. Elytra at base just i»erceptibly narrower than the heail :
sides moderately divergent posteriorly, slightly longer than the wiiltli at
base, nearly straight ; together broadly, roundly, and rather strongly eiiiar-
ginate behind; suture one-seventh as long again as the pronotnni ; surface
feebly impressed on the suture toward thi! base, coarsely and rather closely
punctured ; i>unctures seldom coalescing, round, very variable in size and
distance, being sniall and widely isolated near the inner basal an),'les, anrl
very large and closely crowded behind the uiidtlle. First three abdominal
Segments sub-equal in widtli, and as wide as the contiguous elytra ; surface
coarsely and clostdy punctnlate, much more lluely so toward the tip ; trans-
verse carinae ..licuspid, cusps rather long, linely acuminate, and distant,
lateral slightly shorter and incline<l inward. Legs moderate, piceous-black
above, femora dark jiiceo-rufous beneath ; first joint of the posterior tarsi
two-thirds as long again as the second, much shorter than the last, joints
two to four decreasing uniformly and very gradually in length.

Malp. — Unknown.

Female. — Sixth ventral segment very evenly rounded behind throughout.

Lt^ngtb 2.7 mm.

Detroit, Michigan, 1.

Tliis species is cusily recognized by the broadly rectangular, tliough
nither moderate and superficially flattened swelling, which occupies
the entire anterior half of the pronotum.

80. S. cariniCOllis n. sp. — Form moderately slender, sides parallel.
Pubescence rather short, coarse, close, sub-recumbent, dark fulvo-cinereous.
Head moderate, twice as wide as long ; interocular surface nearly flat, two
and one-half times as wide as the eye ; longitudinal sulcations very deep and
conspicuous ; intermediate surface narrower than the lateral portions, strongly
and evenly convex ; punctures rounded, fine, very closely crowded, some-
what confused ; ocular lines meeting at somewhat more than one length in
advance ; antennae very slightly longer than the width of bead, moderately
Blender, piceous-black, club distinct ; third joint one-fourtli as long again
as the fourth, fourth just perceptibly longer than the fifth, seventh much
shorter than the sixth and slightly longer, though scarcely more slender
than the eighth, eighth slightly shorter than the seventh and no thicker,
sub-cylindrical, joints of club increasing rather rapidly in length. Prothorax
arcuately, evenly, and rapidly increasing in width to the middle, where it is
three-fourths as wide as the head, and distinctly narrower than long ; sides

m

m

102

NORTH AMKHICAN

thtjiice rnoderatHly convergent posteriorly hikI strongly sinnate ; antorlor
mari^in sli^;litly shorter than the hase, very areuate, posterior margin trans-
verse ami straight ; surface finely, closely, rather feel)ly, anil confuseill_>
punotato, very foolily nhining ; feehly and minutely tnliercutatH near tho
basal angles ; transversely swolli<4i near the middle, from which jioint,
extending posteriorly nearly to the hase, there is a narrow, fine, acute, and
promiTient carina. Elytra at the hase very slightly narrower than the head;
sides very feebly divergent posteriorly, eijual in length to the width at base,
nearly straight ; together hroadly, somewhat angularly anil deeply emargi-
nate hehind; suture equal in length tiv the jtronotum; surface rather de-
pressiMl, feehly impressed along the suture, more strongly so toward tho hast),
also longitudinally inij)ressed nt>ar the hunn^'i ; closely, rather coarsely, very
feehly, and irregularly i)Unctured and channeled. First three ahdominnl
Begments equal in width, and as wide as the contiguouH elytra; surface
coarsely, exceedingly closely, and feebly punctulate ; transverse carinae not
cusped. Legs moderate, ])iceous-hlack, femora dark j)iceo-rufous ; first joint
of the posterior tarsi two-thirds as long again as the second, second as long
aa tho third and fourth together.

Mule. — Fifth ventral segment emarginate in its middle third at apex,
emargination (evenly rounded, feeble and almost nnmeasurable, angles
rounded, contiguous surface feehly impressed throughout anteriorly, sides
of impressed area slightly convergent ; sixth segment sinuate at apex, sinus
and apices nearly equal in width and curvature, five times as wide as deep ;
seviMitli feebly and roundly emarginate at tip, surface minutely granulosa
ami lusti'eless.

Fciniilc. — Sixth segment angularly produced at the apex.

Length 2.3-2.8 mm.

IVIivniuette, IMichigaii, 4 ; Gargantua, Micliigan, 1 ; Mioliipicoten
River, Luke Siiju'rior, 1.

One of tlie most distinct species of the genus, and the only one
known to me, Imving a carinated pronotiim. All the chai'acters
are good. The palpi ai'e veiy slender, piceoiis-bhick, witli exception
of tlie fifst joint and the base of the second, which are paler and
piceo-testaceous ; the third joint is very long.

The above description was taken from tiie female, except that of
the antennae, which is drawn from a male specimen.

81. S. insignis n. sp. — Form moderately robust. Pubescence rather
long, sparse, recuml)ent, and cinereous. Head rather large, twice as wide
as long ; interooular surface nearly flat ; sulcations rounded and conspicuous ;
intermediate surface very slightly wider than the Lateral portions, evenly
alid rather strongly convex ; punctures small, very sparse, feebly impressed,
and not distinct, interspaces highly polished ; ocular lines meeting at scarcely
one-half a length in advance ; antennae slightly longer than the width of
head, basal joint black, second a little paler, the remainder pale piceous-
brown, rather robust, club distinct ; third joint one-fourth as long again as
the fourth, fourth and fifth equal, sixth and seventh equal in length, the

COLKOPTERA.

103

latter very gliglitly tlie tliiiikcr, ninlitli distinctly elongatod, oval, joints of
cliilt incrnasiiig nliglify in Icnglli, tlu' last two of m-arly cinial tliickiicsH ;
inaxillai'v |)iil|ii ratir 'i' long ami mliust, ])irc(iiiH-l)la('k, first joint ]ii('f(i-tfsta-
ceouH. Prothorax .ircuatoly, evenly, and giailually widening to the middle,
where It is fo.ir-llfllis as wide as the head and one-sixth narrower than long ;
sifles them'.) very niodiTately convergent and feehly sinnate ; anterior and
posterior Margins ecpial in length, the former the more arcuate ; snrfaee very
feehly airl minutely tuheroulate at tins hasal angles, otherwise very evtnily
C' vex, rather llnely, very sparsely, nnevenly, and feehly (lunctate; punc-
tures i.npressed and varying greatly in size ; interspaces tlat, ohscurely ami
minutely retiuulateil, highly polished. Elytra, at base very slightly narrower
than the iiead ; sides moderately divtM'gent pcsteriorly, distinctly longer than
the width at base, moderately arcuate ; together hroaiUy and very fi'ehly
emarginate hehin<l ; suture nearly one-sixth as long again as t\n; pronotiim ;
Hurface feehly inipre8He<l along the suture, almost equally so throughout ;
rather feehly, somewhat distantly, and very irregularly punctured and chan-
neled, interspaces nearly tlat, highly polished. Abdominal segments decreas-
ing almost uniformly and rather rajiidly in width, .Irst nearly as wide as the
contiguous elytra; surface liighly ]iolished, rather strongly convex, feehly,
minutely, and very sparsely j)unctulate; transverse carinat* apparently not
cusped. Legs moderate, piceous-hlack, tarsi paler; first joint of jxisterior
tarsi two-thirds as long again as the second, second slightly longer than the
third.

Male. — Posterior edge of the fifth ventral segment just pt>rc.eptihly emargi-
nate in its middle third, emargination evenly rounded and scarcely measur-
able ; sixth very broadly sinuatti at apex, sinus occupying nearly the entire
segmental apex, evenly rounded throughout, about twelve times as wide as
deej).

Female. — Sixth ventral segment evenly rounded behind.

Length 2.9 mm.

Oiik Grove, California, 1 : Los Angeles, California, 4.
The very S|)arse and peculiar punctuation of the head and prothorax
8ej)arates this species from several closely allied forms.

Suhdivision >.

The sjtecies of thi.s subdivision are nearly always easily recogni-
zable ; they are generally small, highly polished, except in the first
group, and more or less pubescent.

There are two groups indicatf^d : —

Punctures rather deep, closely crowded, hut usually not coalescent ; inter-
spaces not shining or very feebly so ; pubescence very coarse, more or less
fulvous, abundant I.

Punctures more or less deeply impressed, rather more distant ; interspaces
highly polished ; pubescence usually fine and somewhat dens", though
sometimes very sparse, varying in color from cinereous to piceous, very
seldom ilavate II.

I

l"l

"FW^

■ft

104

NOUTII AMERICAN

Subdivision >.
Group I.

Tliis group contiiius but two specln, both very abiindiint, well
kfiowii, and of very distinct appearance. They are nearly opaque,
and have n roughly tiiougli evenly Ludptured surface. The robust,
fulvous setae are very cons|)iciious. .S'. eorvits might be placed here,
but it lacks the fulvous pubescence to a great extent.

Our two species may be recognized by the following characters : —

Longitudinal sulc.ations of liead distinct ; form slender 82. stygicilS.

Sulcatioiis of head obsolete ; nterocular surface flat ; form more rnlmst.

S3, egeiius.

82. S> stygiciis F^ay. — Form rather slend(;r. Pubescence short, very-
coarse, abundant, semi-erect, and setiforni, pale llavo-cinereous. Head
UKxbirate or small, scarcely twict^ as wide as long ; interocular surface
scarcely more than twice as wide as the e^'e, nearly flat, very densely punc-
tured ; jiunctures shallow and sub-variolate, interspaces very narrow ; ocMilar
lines meeting at one lengtli in advance; longitudinal sulcations distinct;
antennae somewhat longer than the width of head, dark fusco-piceous, base
bhick, club small but abrupt; third joint just perceptibly longer than tlie
fourth, sixth very slightly longer than the soventli, eighth sub-globular,
very small, joints of club nearly equal in size, tentli slightly tlie thickest ;
maxillary palpi dark fusco-piceous, lirst joint fusco-testaceous. Prothorax
widest notably before tlie middle, where it is five-sixths as wide as the liead,
and one-fifth narrower than long ; sides thence feebly convergent posteriorly
and almost straight ; sides anteriorly evenly arcuate ; posterior margin
slightly longiu' and less arcuate than the anterior ; surface evenly convex,
rather coarsely, very closely, somewhat evenly, and variolately punctured,
interspaces very narrow, minutely granulated, and feebly shining. Elytra
at base very slightly wider than thti liead ; sides nearly parallel and strongly
arcuate, much longer than the width at base ; together broadly, very evenly,
and rather feebly emarginate posteriorly ; suture one-fifth as long again as
the jironotum ; surface evenly convex, coarsely, very closely, and evenly
punctate ; punctures wide, shallow, variolate, interspaces about one-fourth
their width, feebly sliining. Abdominal segments decreasing very gradually
in width, first slightly narrower tlian the contiguous elytra; surface convex,
shining, rather finely, and somewhat distantly punctulate ; punctures im-
pressed ; transverse carinae 4-cuspid, cusps very short but distinct, intervals
feebly sinuate. Under surface of abdomen shining ; pubescence long, fine,
and recumbent ; rather coarsely and distantly punctulate. Legs moderate,
dark piceous, tarsi paler ; first joint of the posterior one-half as long again
as the Second, second notably longer than the third.

Mole. — Posterior edge of the fifth ventral segment just perceptibly emargi-
nate throughout its width ; sixth broadly sinuate at the apex, sinus sonie-
wliat strong, evenly rounded, about six times as wide as deep.

COLEOPTERA.

105

Female, — Sixth aegmont very broadly and triangularly produced poste-
riorly, soinetiines nearly evenly rounding.
Length 3.0-3.7 nun.

Michi|ticoten River, Lake Superior, 7 ; Batclieliwaiuing Bay, Lake
Superior, 1 ; Lake Superior, 7 ; Columbus, Texas, 8 ; Topeka, Kan-
sas, 1 ; Western States, 2 ; Selma, Alabama, 3 ; Southern States, 1 ;
Middle States, 4 ; INIarquette, Michigan, 1 ; New Jersey, 2 ; District
of Columbia, 2 ; Pennsylvania, 2 ; Long Island, New York, 4; New
York, 3; Cambridge, Massachusetts, ] ; Unknown, 13.

This common and well-marked species seems to vary to a consider-
able extent ; the head is narrower between the eyes, the third joint
of the antennae is much longer than the fourth, and the jialpi are
entirely black in tiie Texas specimens, and the elytra are seemingly
shorter in those from Michigan ; there also appears to be a slight
variation in the relative lengths of the second and third joints of the
posterior tarsi. The punctuation docs not appreciably vary. There
may be two or more distinct species indicated by these characters,
but they are so cl"se, and seem to have so many intermediate forms,
that I do not feel warranted in describing them. It may be readily
recognized by the unusually long second joint of the posterior tarsi.

I beWeve this species has been identified as chierascens Kr., by
Mr. Fauvel, but, on reading the description of that species, and com-
paring it carefully with that of stygicus Say, as just given, I am
unwilling at present to make the change.

83. S. egeniis Eriohs. — Form rather robust. Pubescence exceedingly
sparse, short, coarse, semi-erect, flavo-cinereons. Head niorhfrate, twice as
wide as long ; interocular surface flat, three times as wide as the eye ; deeply,
rather finely, and exceedingly closely punctured ; no trace of sulcations or
elevation ; ocular lines meeting at about two and one-liaU" lengths in advance ;
antennae rather slender, as long as the widtli of head, piceous-black, paler
toward tip, club small, but distinct ; third joint one-third as long again as
the fourth, joints three to six uniformly decreasing in length, six and si>ven
sub-equal, joints of club successively increasing in length, eleventh acumi-
nate at lip; maxillary palpi piceous-black. Prothorax robust, widest just
before the middle, where it is five-sixtha as wide as the head and but slightly
narrower than long; sides thence feebly convergent posteriorly, and just
perceptibly sinuate ; anterior margin very slightly longer than the posterior,
equally arcuate ; surface evenly convex with a very slight transverse impres-
sion just behind the anterior margin-; rather finely, evenly, and exceedingly
closely punctured, interspaces just visible as acute ridges, lustreless. Elytra
at base slightly wider than the head ; sides slightly divergent posteriorly,
feebly and evenly arcuate ; together broadly and very feebly emarginate
behind ; suture one-fifth as long again as the pronotum ; surface convex,

!^'«l

m

It I

i

ji Wi

s

w

10(5

NORTH AMERICAN

together with a slight depression at the middle of the base, very deeply,
evenly, rather coarsely, and exceedingly closely punctured ; j)unctures deep,
polygonal in outline ; inttirspaces very narrow, minutely granulate, without
lustre. Abdominal segments decreasing regularly and (juite rapidly in
width, llrst nearly as wide as the contiguous elytra; border proniin(!nt ;
surface finely punctulate, minutely but very distantly granulate, not shin-
ing ; transverse carinae 4-cuspid, cusps broad, short, wider at the apices.
Under surface of the abdomen piceous-black, paler toward the tip, more
lustrous than the upper surface and more finely punctulate. Legs moderate,
piceous-black ; first joint of the posterior tarsi one-half as long again as the
second, second but slightly longer than the third.

Male. — Posterior edge of the fifth ventral segment sinuate ; sinus vijry
narrow and feeble ; sixth broadly sinuate at apex, sinus evenly rounded,
five times as wide as deep.

Female. — Sixth segment very broadly and evenly rounded behind.

Length 2.8-3.1 mm.

Michigan (Escanaba, Marquette, Grand Ledge, Monroe), 51 ;
Topeka, Kansas, 1 ; Pennsylvania, 2.

One of the most distinct species in the genus by reason of its sculp-
ture. The surface under a hand-lens seems absolutely without lustre.

Subdivision >.
Group II.

The characters of the present group have been sufficiently stated
above ; the following diagnostic table will, perhaps, distinguish the
species nior'* ar less satisfactorily : —

Transverse carinae of abdomen 4-cuspid.
Prothorax canaliculated.

Longitudinal elevation of interocular surface distinct.
Prothorax widest distinctly before the middle, somewhat cordate.
Small si)ecies, 2.7-3.0 mm. ; pubescence rather long and conspicuous.
Somewhat slender ; ocular lines close and very convergent. Colo-
rado 84. dolosiis.

More robust ; ocular lines distant and almost parallel. California.

85. villosiis.
Larger species, 3.8—4.0 mm.
Pubescence almost completely absent ; elytral punctures small,
evenly distributed, and widely isolated. District of Columbia.

8(3. sectilifer.

Pubescence rather long and conspicuous ; elytral punctures large,

deep, rounded, and often semi-coalescont... 87. Illilleporiis*

Prothorax widest at the middle. British Columbia. ...88. jesiliilis.

Interocular surface nearly Hat; sulcations and longitudinal elevation

obsolete.

COLEOITERA. 107

Prothovax much elongated ; punctures separated hy at least their own
diameters ; pubescence very sparse and inconspicuous.

89. viniiillus.
Prothorax very robust ; punctures very close, never separated by mure

than one-third of their own width.
Third joint of antennae much sliorter than the fourth. Alaska.

90. congener.
Third joint of antennae much longer than the fourth. Massaelui-

setts, Michigan 91. canaliculatus.

Prothorax not caualiculated.

Legs pale ; body densely clothed with very long, erect, bristling setae,

which are very prominent 92. c'ai'Oliliae«

Legs black or nearly so; pubescence short, sub-recumbent, moderately
prominent.
First joint of posterior tarsi twice as long as the second. ..93. ageilS*
First joint distinctly less than twice as long as the second.

Joints three to five of antennae uniformly decreasing in length.

94. pudicus.
• Ant-innal joints four and five equal in length, abruptly shorter than
the third.
First joint of posterior tarsi very short, scarcely one-half longer

than the second df>. minor*

First joint much more than one-half longer than the second.
Form somewhat slender ; head rather large. Massachusetts.

9(). rigitlUS.

Form more robust ; head small. Nebraska 97. incertus.

Transverse carinae of abdomen tricuspid ; lateral cusps very small and

rudimentary 98. parallell'S.

Transverse carinae not cusped.

Prothorax very feebly caualiculated ; body depressed, elongated ; species

rather large. White Mountains, N. H 99. noCtivagllS.

Prothorax not caualiculated.

First joint of posterior tarsi very slightly longer than the second ; punc-
tuation extremely fine. California 100. lUCUlenttlS.

First joint of posterior tarsi from one-half to three-fourths longer than
the second.
Very small species, not exceeding 2.2 mm. in length.

Elytra much longer than wide, distinctly narrowed toward the base,

distantly punctured, very highly polished 101. jUTencUS.

Elytra nearly quadrate, very densely punctured.

102. panperculus.

Larger species, not less than 2.8 mm. in length.

Antennal joints three to six u.iformly decreasing in length; form

of body sub-cylindrical 103. liaplus.

Antennal joints three and four ecjual in length ; suture of elytra

but slightly longer than the pronotum 104. enOflis.

Antennal joints four and five equal in length and distinctly Shorter
than the third.

Ii

i

I

...'♦>•

nfi

n

108

NORTH AMERICAN

'1:

Piotliorax distinctly elongated, widest at one-third itd length
from tlie apcx ; abdominal segments very rapidly dei'reasing in

width lOr). dives.

Prothorax very robust, just perceptibly narrower tlian long,
widest very near the middle ; abdom'nal segments broad,
decreasing very slowly in width.
First joint of posterior tarsi one-half longer than the second ;

body coarsely punctured 10(J. silbgriseilS*

First joint two-thirds longer than the second ; body much more

finely and closely punctured 107. terricola.

First joint of posterior tarsi twice as long as the second.

Large species 3.7—4.1 mm. ; body excessively minutely punctate ;
pubescence long and recumbent. Wasliington Territory.

1U8. inunduliis.

Small species not exceeding 2.9 mm. in length.

Prothorax widest before the middle ; pronotum remarkably tuber-

culate. Florida 109. tubercillatll8.

Prothorax widest at the middle ; surface of pronotum very even.
Antennal joints four and five equal in length, one-third shorter

than the tliird 110. indistiiictlis.

Antennal joints three, four, and five uniformly and very rapidly

decreasing in length ; body vt-ry densely and conspicuotisly

hirsute 111. briiiiialis.

84. S. dolosus n. sp. — Form rather slender. Pubescence long, fine,
rather dense, sub-recumbent, pale flavo-cinereous. Head small, twice as
wide as long ; interocular surface equally trilobed by the very distinct sulca-
tions ; intermediate and lateral surfaces nearly equally, rather strongly, and
evenly convex ; punctures rather coarse iind very close, nearly even ; ocular
lines meeting at about four lengths in advance ; antennae about equul in
length to the width of head, piceous-black, very slightly paler toward tip,
club moderate; third, fourth, and fifth joints decreasing nearly uniformly
and very gradually in length, sixth and seventh sub-equal in length and
much shorter, last two joints much thicker than the ninth ; maxillary palpi
short and robust, piceous-black, first joint paler. Prothorax robust and
somewhat cordate, widest well before tlie middle, where it is three-fourths
as wide as the head, aiui nearly one-sixth narrower than long ; sides thence
moderately convergent posteriorly and slightly sinuate ; anterior margin
slightly longer and much more arcuate than the posterior ; surface somewhat
longitudinally ridged at the sides toward the b.ase, finely and irregularly
punctate; punctures impressed, very distant in the middle, closer toward the
margins ; interspaces very convex, highly polished ; canaliculation nearly as
long as the pronotum, narrow, deep, equally wide throughout. Elytra at
base distinctly wider than the head; sides just perceptibly divergent poste-
riorly, as long as the width at base, feebly arcuate ; together broadly and very
feebly emargiuate behind : suture one-fifth as long again as the pronotum ;
surface somewhat uneven, rather finely and evenly punctate; punctures im-
pressed ; interspaces nearly as wide as the punctures, very convex, highly

COLEOI'TERA.

109

polislu'd. Abdominal segments rlecieasing nniformly <anil rather rapiilly in
width, first as wide as tlie contiguous elytra: surface very convex, highly
polislicd, densely hirsute, very finely and sparsely ])unctulate ; transverse
carinao 4-cuspid, cusps etjual in length, ratlier approximate, tinely aeieular.
Legs short, dark piceous ; first joint of the posterior tarsi scarcely one-fourth
as long again as the second, much shorter than the last, first four joints
decreasing nearly uniformly in length.

Malf. — Posterior edge of tlie fiftli ventral segment scarcely perceptihly
and very hroadly sinuate; sixth broadly emarginate at apex througliout it?
wi'lMi, emargination evenly rounded throughout, about ten times as wide as
dee]).

Fcmiile. — Unknown.

Length 2.7 mm.

Fort Garland, Colorado, 1.

S."). S. villosus n. sp. — Form moderately robust. Pubescence long, very
denst>, recumbent, fine, cinereous, and conspicuous. Head small, twice as
widt; as long ; interocular surface two and one-half times as wide as the eye,
very slightly convex ; equally trilobed by the moderately strong siilcations ;
intermediate surface evenly convex, summit impunctate ; punctures ratlier
coarse, variolate, rather distant, evenly distril)uted ; ocular lines meeting at
three to four lengths in advance ; iirst two joints of antennae biack, mandi-
bles fuscous at tips. Prothorax widest before the middle, where it is four-
fifths as wide as tlie head, and one-fifth narrower than long ; sides tlieiice
very moderately convergent posteriori}-, and very strongly sinuate ; anterior
margin shorter and much more arcuate than the posterior ; surface faintly
swollen at the sides, particularly toward the base, finely, distantly, ai;d
evenly punctate ; punctures deeply impressed ; interspaces wider than the
punctures, convex, very highly polished ; canaliculation as in millv)ii,rus.
Elytra at base distinctly wider than the bead ; sides rather feebly divergent
posteriorly, much longer than the width at base, rather strongly arcuate ;
together broadly, roundly, and just perceptibly emarginate behind; suture
about one-third as long again as tlie pronotum ; surface rather strongly
impressed along the suture toward tlie base, and also feebly, longitudinally,
and somewliat indefinitely impressed toward the middle of the l)ase of each
elytron, finely and evenly punctate ; punctures deeply impressed and very
seldom coalescing, much smaller toward the base ; interspaces as wide as the
punctures, convex, very highly polished. Abdominal segments decreasing
uniformly and rather gradually in width, first very slightly narrower than
the contiguous elytra ; surface broadly convex, highly polished ; finely,
ratlier sparsely, and evenly punctulate ; transverse carinae 4-cuspid, cusps
equal, rather approximate, finely aciculate and prominent. Legs stout,
pic(!ous-black, femora black ; first joint of the posterior tarsi one-half as long
again as the second, distinctly shorter than the fiftli, second and third sub-
equal, fourth very slightly shorter.

Male — Fifth ventral segment very feebly fiattened in its middle fourth
throughout, edge scarcely modified ; sixth segment very broadly sinuate at

i 1

I

if

'

w

no

NORTH AMKRICAN

■ f;

w ■

If

;f '-m

apex, siinis evenly rounded, extending through nearly the entire segmental
.tidtli, ten to twelve times as wide as deep.

Feiniile. — Unknown.

Length 3.0 mm.

Ciilitbrniii, 1.

Tlie antennae are missing with exception of tlie first two joints,
ami tlic maxillary palpi are also wanting.

Tlie sj)ecies somewiiat resembles iuilfeporns and ri'nnuliis, but
differs from both in the relative lengths of tiie elytra and prothorax,
and from tiie latter in addition, by its much narrower head and dense
pubescence.

86. S. sectilifer n. sp. — Form moderately robust. Pubescence of head,
proiiotum, and elytra so line and sparse as to be scarcely visible, cinereous;
that of abdomen also very fine, semi-erect, and exceedingly sparse, cinereous.
Head small, scarcely twice as wide as long ; interocular surface nearly flat,
ecjually trihdx'd by the longitudinal sulcations, which are just apparent;
evenly jtunctate ; punctures small and impressed ; interspaces slightly wider
than the punctures, highly polished ; ocular lines meeting at one and one-
half lengtlis in advance ; antennae slightly longer than the width of head,
slender, dark fuscous, club moderate ; third joint one-lifth as long again as
tlu! fourth, joints four to seven gradually dettre.asing in length, joints of club
gradually increasing in length, ninth much narrower than the last two,
eleventh acuminate at tip; first five joints nearly glabrous ; maxillary palpi
slender, flrst joint testaceous, second darker, third black. Prothorax widest
slightly before the middle, where it is much wider tlian the interocular sur-
face, sides thi^ice nearly parallel posteriorly and sinuate, length one-eighth,
greater than the width ; anterior margin shorter ai ' much more arcuate
than the posterior ; surface evenly convex, with a nam. , shallow and equal,
longitudinal canaliculation, terminating at a very slmrt distance from either
margin; rather finely punctured and transversely regulose ; interspaces
highly polished. Elytra at base much wider than the head, sidijs almost
parallel and slightly arcuate, more so posteriorly ; together broadly and very
feebly emarginate behind ; length of suture slightly greater than that of the
pronotum ; surface gencu'ally convex, with a slight oblique impression just
before the middle of each, and anotlna- near the outer apical angle; quite
evenly punctate ; punctures small and dee])ly impressed ; interspaces much
wider than the punctures, highly polished. First three abdominal segments
nearly eciual in width, and almost imperceptibly narrower than the elytra
behind ; surface highly polished, finely and distantly punctulate ; transverse
carinae acutely and finely 4-cusi)id, intervals sinuate. Legs short, black,
femora .and tibiae nearly glabrous, tarsi slightly paler ; first joint of posterior
three-fourths as long again as the second, second much longer than the third.
Under surface of the abdomen punctate like the dorsal surface.

Mole. — Unknown.

Female. — Posterior edge of sixth ventral segment evenly rounded.

Length 3.8 mm.

District of Columbia, 1.

COLEOPTKRA.

Ill

87. S. inilleportis n. sp. (Fan vol MS.). — Form moderately robust,
males more slender. Pubescence very long, erect, moderately dense, dark
cinereous. Head very small, twice as wide as long ; interocular surface
very slightly convex, eriually triloiteil by the conspicuous sulcations ; interme-
diate surface evenly convex ; punctures largo, round, impressed, and close;
interspaces very convex and highly polished ; ocular lines meeting at three
■ ir four lengths in advance; antennae slendt^r, much longer than the width
of hea<l, coarsely setrse, base black, remainder piceous, club distinct ; joints
three to six sub-equid, sixth vry slightly longer than the seventh, eighth
elongated slightly, joints of club increasing in 'ength, last two very robust;
maxillary palpi j)ice()us, first joint i)aler. FiOlhorax widest slightly bc^fore
tlie middUt, where it is from one-sixth to one-seventh narrower than long;
sides thence just perceptibly convergent posteriorly and deeply sinuate;
anterior margin very slightly longer and more artniate than the posterior ;
surface Hat above, abruptly declivous at the sides : deeply, closely, and
irregularly punctate; interspaces very convex, liighly polished: canalicula-
tion as in riiiniilitK. Elytra at base wider than the head ; sides very feebly
divergent posteriorly, rather strongly arcuate, and very slightly longer than
the basal widtli ; together broadly and just perceptibly emarginate behind ;
suture one-sixth as long again as the ])ronotum ; surface convex, impressed
along the suture and near the outer apical angles, coarsely, rather closely,
and somewhat irregularly punctate; punctures round, deeply impressed,
and varying in size ; interspaces convex and highly polished. Abdominal
segnit!iits decreasing unitormly in width, rajiidly in the males, slowly in the
fen)ales ; flrst narrower than the contiguo 'S elytra ; surface convex, coarsely
and closely punctulate at the sides, impunctate and highly polished along
the middle; transverse carinae 4-cuspid, cusps api)roximate, long, acicular,
l)roniinent ; under surface coarsely )uinctulate at base, becoming very finely
and closely so at tip ; clothed rather sparsely with long semi-erect setae.
Legs short, moderately slender, black ; tarsi slightly paler ; first joint of
posterior tarsi one-half to two-thirds as long again as the second, second
longer than the third, third and fourth sub-equal.

Mule. — Posterior edge of the fifth ventral segment transverse in some
specimens, just jierceptibly sinuate in others, surface neither impressed nor
llatteiied ; sixth segment sinuate at ai)ex, sinus much broader than the
apices, evenly rounding, five times as wide as deep ; seventh deeply emargi-
nate at tip, bottom of emargination transverse, teeth very long and slender.

Fi'iiKile. — Sixth segment very broadly angulate at tip ; seventh sometimes
irregularly and deeply serrate at tip.

Length, males, 3.0 mm. ; females, 4.0 mm.

New York, 3 ; St. Catharine Island, Georgia, 3 ; Florida, 7 ;
Unknown, 3.

Kesembles vinnah(s, but differs in the pubescence, in the coarser
and closer elytral punctuation, and in the sexual characters.

A specimen of this species affords one of the few instances which
I have observed, in which the liiigula with the paraglossae has been
protruded ; it seems to be an exceedingly rare phenomenon in the
American representatives of the genus.

c '

TT

112

NORTH AMEUICAN

.,11 I

88. S. jejill'llH n. sp. — Form robust. Pulit'sconct* rather aliuiidaut,
seiiiiMTt'ut, L'iii iiMMHis, iiioil('i'at(> in li'iif;tli. Head sini'll, scarci-ly twice as
wide as long; intorouular biirl'acu Ihn, a little more than twice as wide as the
eye, finely and ratlier closely punctate; sulcations Hhallow, 'lut distinct;
ocular lines meeting at about two luiigths in advance ; antennae very short
and robust, scarcely as long as the width of head, dark fuscous, sparingly
setose, club distinct ; joints three to live equal in h-ngth, six and seven e(]ual,
last twoe(iual, very large, sub-globular, ninth very uiuch suiiiUer; maxillary
palpi slender, piceous-black. base of first joint slightly })uler. Prothorax
widest just before the middle, wh(^ro it is four-liiths as wide as the head ;
sides thence convergent slightly posteriorly, sinuate ; length slightly greater
than width ; anterior and j)osterior margins ecjual in length and e(iually
arcuate; surface rather evenly convex ; deeply, rather finely and irregularly
punctate ; interspaces moderately shining ; a long, narrow and equal medial
canaliculation exten<ls to within a ver^ short distance of eithtsr margin.
Elytra at base perceptibly wider than tlu head ; sides divergent posteriorly
and arcuate ; togethi^r broadly and feebly emargiiiate behind ; suture one-
iifth as long again as the pronotum ; surface of each slightly swollen near
the iniuu' basal angles; deeply and rather un(>venly punctate ; punctures
impressed, intersi)aces generally wider than the punctures, shining. Abdo-
iTjinal segments decreasing moderately and evenly in width posteriorly, first
narrower than the elytra ; very finely and rather closely punctulate ; surface
m«'j lerately shining ; transverse carinae 4-cubpid, cusps having the points
expanded, intervals strongly sinuate. Legs moderate, dark piceous-black,
tarsi very slightly paler; first joint of the posterior about twice as long'as
the Second, second slightly longer than the thinl. Under surface of th(f
abdouu'u much more coarsely and distantly punctulate than the upper,
having the surface more liighly polished.

Mule. — Posterior edge of the fifth ventral segment very broadly and feebly
bilobed ; sixth very broadly and strongly sinuate at apex, depth of sinus
equal to one-fifth its width ; seventh segment deeply emarginate at apex.

/•'eiiuile. — Unknown,

Length 3.0 nun.

Bt'itisli Columbia, 1.

89. S. vinilUlUS n. sp. — Form moderately robust. Pubescence long,
semi-erect, fine, rather abundant, piceo-cinereons on the elytra and abdomen,
shorter and erect on the head and prothorax. Head moderate, twice as wide
as long ; interocular surface Hat, more than twice as wide as the eye ; equally
trilobed by the scarcely perceptible sulcations ; intermediate surface evenly
and feebly convex ; punctures closely crowded, small, polygonal, and some-
times coalescent ; antennae much longer than the width of head, slender,
coarsely setose, basal joint black, remainder piceous-black, club not con-
spicuous ; third joint one-fourth as long again as the fourth, fourth slightly
longer than the fifth, sixtli and seventh of equal length, eighth twice as long
as wi<ie, oonoidal, joints of club of nearly equal Ituigth, increasing in width,
ninth conoidal, last ovoidal ; first joint of maxillary palpi piceo-testaceous,
base of second same, remainder piceous. Prothorax elongated, widest slightly

>

COLEOrTKRA.

113

lu'l'orc till' iniddli', wlu-rc it is tlirci'-t'ourtlifl as wide as tlir liciid, (uid oin'-
foiiitii iiMi'iowt'i' tliaii Idii^ ; Hi(i(!S tliiMic" iiiodcr.'itcly coiiviM'f^cnt and sli^litly
simioiis ; anterior and posterior inar^'ins e<iiuil in cnrvaturc, the loiniiT
iiotictmbly longer ; surface strongly declivous /it tlio Hides ; rntlier finely,
somewhat irregnl.'iily luinctate ; jninetures deeply inipressi'(l and s<iinetiines
(Mialescetit ; intei'sjiaces nearly as wide as the pnnctures, very convex, highly
polished ; cnnaliciihition long and narrow, sides soniewhiit irregularly out-
lined, terminating within vi^ry short distances of the margins. Elytra at hase
as wide as the head ; sides very feidily divergent posteriorly and strongly
arcuate, longer than breadth at hasH ; together broadly nnd just perceptibly
emarginate behind ; suture very slightly longer than the pronotuni ; surface
convi'X, impressed .along the sutui'e, niorc^ deeply so towfird the base ; moder-
ately coarsely, deeply, and rather irr.'gularly i)unctato ; punctures sehloui
coiJescent ; interspace generally as wide as the ]>unetures, very convex,
liighly polished. Abdominal segments decreasing uniformly and rather
rapidly in widtli, first scarcely as wide as the contiguous elytra ; surface very
convex, highly polislicil, sparsely and (iuely puuctulate ; transverse carinae
4-cuspid, cusi)s equal in length and equidistant, aciculate and prominent,
intervals but slightly sinuate. Legs slender, moderate in length, black,
tarsi piceous-black ; lirst joint of posteiior tarsi foui'-lifths as long again as
the second, second and third sub-ecjual, fiftli as long as the first. Under
surface of the abdomen densely clothed with long, piceous, sub-recuuibent
setae.

Male. — Posterior edge of the fourth ventral segment emarginate in its
middle two-fifths, emargination evenly rounded and just ]iercei)tible, con-
tiguous surface feebly impressed for a short distance anteriorly ; fifth emar-
ginate in its middle third at a])ex, emargination feeble and evenly rounded,
contiguous surface flattened throughout for the same width anteriorly-; si.\th
segment sinuate at tip, sinus broad, evenly roundcid, much wider than the
apices, six times as wi<le as deep; s(!V(nith <leeply emarginate at ti]), bottom
of emargination transverse, sides produced in long, lateral, setigerous teetli.

FiiiKile. — iiixth segment broadly truncate at lip, truncation arcuate; tip of
seventh segment most irregularly, acutely, and deeply serrate.

Length 3.1-4.0 mm.

Cainbriilge, Massachusetts, G; White Fish Point, Lake Superior, 3;
Isle Hoyale, Lake Superior, 1 ; Marquette, Michigan, 1.

In tlie males the al)dominal segments decrease mucli more rapidly
than in the females.

I had already separated and described the Western specimens as
distinct, when I discovered that the characters upon which the sepa-
ration was based were so variable as to be comparatively valueless.
The tarsal structin-e varies considerably in the proportional lengths
of the first three joints ; the intervals of the carinal cusps are also by
no means constant. The sinus in the specimen from Isle Royale,
Lake Superior, is much deeper than in the others, and, as a rule,, the?
Stemsf. 8

w

111

NOIITII AMERICAN

'! '1

ii

S.v

Westtrn specimens arc smallfr and more hU'ikIit, witli a narrower Iit-ad
anil soint'wliat sliortor j)rotliorax, than tlios(; from IMassaclinsctts.

Tlic s|>('ci('s of lliis snbdiv i;rKin lliiis far coiisidfrctl have cost nioro
time anil trouble in tlieir s('|iaration and d(•^4cri^)tio^ than tho.su in any
other portion of the penus of eipiul extent ; one or two of them may
sid)se(inentiy be found to be varieties, bnt with tlie present material
before me I can see no other eoiirse than to consider them as species.

OO. S, COiiK<'iiCl' Miikl. — Form very nioiluratidy rolniHt. I'libi-si-ence
moderately loii^', close, tine, semi-erect, very jic'ile Ihivo-cinHreoiis. Head
moderatt^, robust, twice as wide as long ; jaliruui very lai'gf ; interociilar
Hurface Very slightly convex, more than twice as wide as the »»yo ; rather
tioarsely, very closely, and evenly jmnctate; hearing no evidences of the sul-
cations ; ocular lines meeting at slightly more tlian two lengtlis in advance ;
nnttuinae sliglitly longer than tluf width of liead, rather slender, ciub distinct,
dark jiiceous-brown, hjisal joints black ; third joint shorter than the fourth,
sixth and seventh e([ual in length, eighth much elongated, oval, joints of
club robust, increasing in length, last two very robust; maxillary jialpi dark
piceous, l>aHal joint testaceous. Prothorax robust, widest at the middle,
where it is nearly live-sixths as wide as the head, and just j)erce|)tibly
narrower than long; sides thence moderately convergent jiostcriorly and dis-
tinctly sinuate ; anterior nwirgin slightly hmger than the posterior, enually
arcuate ; surface indistinctly tul)erculate near each basal angle ; deeply,
very idosely, and evenly punctate, intt^rspaces minutely granulate ; cauali-
cnlation as in cuiuiliculdlus, but more indistinct. Elytra at base as wide as
or very slightly wider than the head ; sides moderately divergent posteriorly,
feebly arcuate and much longer than the width at base; together broadly,
roundly, and moderately emarginate behind ; suture rather more than one-
fourth as long again as the pronotum ; surface feebly impressed along the
suturi', more strongly so toward the base, linely, moderately closely, aiul
very t;venly punctate ; interspaces tlat, distinctly reticulate. Abdominal
segments decreasing uniformly and very gradually in width, lirst as wide as
the contiguous elytra ; surface broadly convex ; rather minutely, closely, and
evenly puuctulate, minute reticulations not evident, interspaces polislo^d ;
transverse carinae 4-cuspid, cusps equal, equidistant, moderately api)roxi-
mate, fii'ely aciculate. Legs rather short and slender, black, piceous toward
tips, tarsi slender , first joint of posterior one-third as long again as the
second, and scarcely three-fourths as long as the last, first four joints almost
uniformly decreasing in length, fourth moderately thin and oblique, densely
clothed beneath with long, cinereous setae.

Mule, — Posterior edge of the fifth ventral segment just perceptibly and
not measurably sinuate ; sixth sinuate at apex, sinus rather more acutely
rounded at the bottom than the apices, about three times as wide as deep .
seventh segment rather feebly emarginate at tip. , .

Female. — Sixth segment evenly rounded behind. * /

Length 3.0-3.2 mm. ' , "

Alaska, 2. . ■

COLEOl'TKJtA.

ii:»

I am not certuiii us to tlie t»;iiiiik' st^xuiil cluiiactors, the ly\w l)ciii<f
(laiiia<;iMl.

Tliis 8[>eciea is very distinct from cunaficnfiitns : tlicy iVitthv in
tarsal strii<;tiin', in llic rciativti Imjrtlis of (lie proliiorax ami elytra,
uiKJ, aitlioii;^li till" cliaractcr of >Au'. stxiiul niotlifications i.s the same,
they (lifli-r conspiciioiisiy in degree.

in. §. caiialicillatUH (Jyll. — Form ratlicr rolaist. l'iil)csccnci! moilc-
rntc in l('iij,'th, ratlifr conrsn, doso, Hub-rt-ciiinbiint, j)nl(' iiicno-cinercdiis.
Head Ifirgi- and rdlmst, twin' as wiilc as loiijj ; inti-rociilar siirfjicf t'ccMy
CDiivi'X, twice as wide as tlie eye, ratluT tiliely, deeply, very closely, and
evenly punutate, witlioiit a trai^e of siiluntions or longitudinal elevation ;
ocular lines meeting at raflier more than two lengths in advance; anti'unae
scarcely as long as the width of head, hiack, slightly paler at tip, slender,
club vrry moderate; third joint one-llfth as long again as the fourth, fourth
and lifth eiiual. sixth and seventh eiinal in length, the latter thicker, eighth
oval, very small, naiTower than the seventh, joints of cliih increasing in
length, the last two of ecjual thickness ; maxillary palpi piceous-black, tirst
joint and base of second pale testaceous. Prothorax robust, widest slightly
before the middle, where it is three-fourths as wide as the head, and dis-
tinctly narrower than long ; sides thence moderately convergent jjosteriorly
and slightly sinuate ; anterior margin very slightly longer than the jxisterior,
e(jnally an'Uate ; surface nearly evenly convex, very closely, finely, deeply,
and evenly punctate; cajialiculation narrow, e(jual in width tliroiighont, as
long as the pronotum. Elytra at base slightly narrower than the lica*!, and
but very slightly wider than the prothorax ; aides moderately divergent
posteriorly, slightly longer than the width at base, and feebly arcuate;
together broadly and moderately emarginate behind ; suture about equal in
length to the pronotum ; surface convex, narrowly and feebly impressed along
the suture; deeply, (dosely, and evenly punctate; punctures very seldom
coalescing ; interspaces narrow, convex, minutely reticulate. Abdominal
Segments decreasing uniformly and very gradually in width, first as wide as
the contiguous elytra; surface broadly convex; finely, very closely, and
evenly punctulate ; transversi; carinae 4-cuspid, cusps nearly eijual, rather
approximate, finely aciculate. Legs moderati.', black above, piceous-black
beneath ; first joint of the i)osterior tarsi three-fourths as long again as the
second, as long as the fifth, joints two to four decreasing uniforndy and
rapidly in length, fourth thin and obliiiue, having long cinereous setae
beneath. Body winged.

. Mull'. — Posterior edge of the fifth ventral segment very feebly emarginate in
its middle fourth, emargination <^venly rounded and just percejjtible ; sixth
sinuate at apex, sinus very broad and evenly rounded throughout, about
eight times as wide as deep, surface piceous-black.

Feiudle. — Sixth ventral segment broadly and evenly rounded behind.

Length 3.2-3.4 mm.

Cambridge, Massachusetts, 2 ; White Fish Point, Lake Superior,
2 ; Lake Superior (locality unknown), 1 ; Grimsby, Ontario, 3.

}'

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116

NOHTIl AMKUICAN

TIm' iiltova description seems to iijirce in all essential points witii
that jiiven hy ICriclison for the European ratKilicnhitns, hut having
no s|)cciniens of the hittiT for eoniparison, I cannot state that tlie
idenlilieation is eonelnsive.

vr

ij'i

rj

[i. i'

02. S. rarolinap n. sp. — Form rntlicr slfudcr. PiilinHctMicc iiKKlcrnfcly
done, cxti't'ini'ly loiijc, conrst^, erect, pjile hiseiiiis in cdIop. Head riitlier
siiiiitl, iidt twice (IS wide ns long ; inferocnlar surface flat, coarsely nnd (dosely
|>iiiict;ite. two (111(1 oiie-lialf times as wide as tli(^ eye ; loi)j;itudiiial elevation
veiy slij;lit but rattier aliniptly limited at tlie sides; antennae slen<ler, very
sliplitly lonjjer than the width of Imad, fuscous, coarsely setose, club dis-
tinct ; thir<l joint one-third as lonj; np:ain as the fourth, Joints six and seven
erinal in len<,'th, ten and eleven eciii/il in thicl<ness, and notalily longer tlian
the ninth, eleventh much lonijer than the tenth, acuminate at tip ; maxillary
palpi liavo-testnceous, slightly darker toward the tip. Prothorax widest
before the nuddle, where it is four-fifths as wide as the head, and one-sixth
narrower than long, sides tlienc(* gently convergent jwisteriorly, and nearly
straight ; surface having an irregular longituilinal elevation ut eat^h sid(%
and a slight transverse depression juHt behind the anterior margin, coarsely
niul somewhat irregularly j)un(^tate ; jiunctiires deeply imjjicssed ; inter-
spaces generally eijual to about one-half their width, highly jiolislied.
Elytra at baso just perceptibly wider than the head; sides almost parallel,
rather strongly arcuate toward the ajiices ; together broaiUy and very feebly
emarginate behind ; suture about one-sixth as long again as the pronotiim;
surface of each slightly swollen at the base near the middle ; coarsely, some-
what regularly jiunctate ; ]Minctures dei'ply impressed; intiu'spaces one-half
as wid", highly polished. Abdominal segments decreaniiij, -xtremely gradu-
ally in width, first nearly as wide as tlie elytra, border moder,- tely prominent ;
surface convex, highly ])olished, coarsidy j)Unctulate ; transverse ,'arinae
obscurely cusped and finely serrulate-, cusjis very short, rounded at tip.
Legs rather short and stout, rufo-testaceous, tarsi ))aler ; first joint of
posterior two-thirds as long again as the second, next three joints gradually
decreasing in length. Under surface of the abdomen more finely pnnctulate,
l)lack, terminal segments paler.

Mtil<\ — Posterior edge of tln^ sixth ventral segment broadly emarginate,
emargination evenly rounded, eight times as wide as deep ; seventh deeply
enmrginate at apex, with the sides ])roduced denticulately.

Female. — Sixth segment broadly rounded behind.

Length 2.8-3.0 mm.

Southern States, 3; Selma, Alahama, 1; Tallahassee, Florida, 1.
Tiie coarsely herissate vestiture of this species renders it vtry dis-
tinct.

93. S> ageilS n. sp. — Form rather robust. Pubescence somewhat sliort,
cinereous, evenly distributed, sub-recumbent, flue, and rather close. Head
nioderate, twice as wide as long ; interocular surface more than twice as wide
as the eye, feebly convex ; sulcations almost obsolete ; punctures very deep,

f

COI-KOITKKA.

117

I'loHc, iiiriili>riit(t ill H\/A', romiil, not lioaliMctMit, evenly ilinfi'lliiituil ; iiittirn|)aii'rt
fi!<>lily HliiiiinK ; cxiulnr liiit-x iiio'tiiif; iit onHniid ont'-liair l<«ii|^tliH in ndviinct);

anti'nnai' Hiinicwliat limber tlian tlic wiiltli of lioail, rullnT slfiidiT, pii \\a-

h\iu:k, dull iiMMliTutc ; tliii'il Joint onc-liaif lon^'iT tlian tlic fourtli, ronitii
and flftli snli-cijnnl, xixth distinctly lon);<'i- and Iomm rolnixt tlian tlio s*>vfnth,
cifflitli sli;,'litly lon>;cr tlian wide, as hrond an tin' scvcntii, rcKiilarly oval,
joints of clul) incrcasiii); very sli^litly in Icn^itli, last two notalily inort' robust
than tilt) ninth and (-qnal in thickiu'ss ; niaxillai-y palpi iiiodi'iati' in li'ii^tli,
first joint picu'o-tfstat'cons, rci ..indcr piccoiis-hlack. Prothorax rolmst,
widest slifihtly liffori' fln' middle wliere it is seven-eij,'litlis as wide as tlio
head, and very slij^htly narrower than loiij; ; sides theiKe feiddy and evi'iily
areiiate anteriorly, ratlu^r moro strongly eonveffjeiit posteriorly and nearly
strai;;ht ; anterior margin slightly long(^r than the posterior, e(|nally arcuate ;
surface very evenly convex, tlnely, very (dosely, and evenly punctate; punc-
tures roniul, not coalescent, deeply inipresscil ; interspaces fcchly convex,
scaruidy one-third an widii ax tlio punuturoH, niinut(dy retiuulato and somu-
what feeldy shining. Elytra at base nearly as wide as the head ; sides
moderately divergent posteriorly, slightly longer than tlm width at base,
distinctly and evenly arcuate ; together broadly, roundly, and strongly
emarginate ludiinil ; suture one-fourth longer than tin- pronotum ; surface
impressed on the suture at the base, and viM'y feebly so near the humeri ;
evenly, rather llnely, and closely punctate; punctures round, deeply im-
pressed ; interspaces generally two-thirds as wide as the punctures, slightly
convex and minutcdy reticulated. Abdominal segments decreasing very
gradually in width, lirst as wide as the contiguiuis elytra ; sides feiddy
arcuate ; border distinct on all the segments ; surface very coarsely, moder-
ately closely, and evenly punctate, much more linely so posteriorly ; trans-
veise cariuae 4-cusiiid, middlt! cus])s very closely approximate, shorti-r than
the lateral, finely acuminate; lateral large, flntdy acuminate, sides straight.
Legs rather short and slender, jiiceoiis-black ; first joint of the posterior
tarsi twice as long as the second, second much longer than th<j third.

,M(ile. — Unknown.

Female. — Sixth ventral segment very, broadly angulato behind.

Length S.tl mm.

Cambridge, Masstu'liusctts, "2.

Tilt' body is of u grayisii-black color ; tlie species is distinguished
by the relative siiortness of tlie middle cusps of tlieabdoiniiiul turinae

94. S. pililicus n. sp. — Form very moderately robust. Pubescence
rather short, coarse, and sparse, semi-erect, pluiuboo-cinereous. Head
moderate, slightly more than twice as wide as long ; interocular surface two
and one-half times as wide as the eye, distinctly convex; equally trilobed
by the excessively feeble sulcations ; intermediate surface evenly and broiadly
convex, crest broadly and very sparsely punctate ; punctures toward the
sides very closely crowded, jiolygonal, shallow, rather small and sub-vario-
late ; ocular lines meeting at one an<l one-half lengths in advance ; antennae
distinctly longer than the width of head, slender, biisal joint black, remainder
piceous-brown, slijjhtly paler toward the tip, club distinct ; joints three to

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118

NORTH AMKRICAN

six imiformly and rapidly decreasing in lenj^tli, six and snvcn snl> ('(inal in
ler^'tli, tlic latter nne-lialf as thick a^ain, ('ii,'litli as liniad as tlie seventh,
suh-triangiilar, joints of ^ilub increasin}; in length, last two of eijnal thick-
ness , maxillary i)al])i dark piceons-brown, first joint and base of the second
niui-li ]>aler, piceo-testace'ons. Prothorax arcnately, evenly, and moderately
rai)idly increasing in width to a point jnst perceptibly in advani.'(> of the
uii(hlle, where it \a four-fiftlis as wide as the head and slightly narrower than
long ; sides thence moderately convergent jiosteriorly and feebly sinnate ;
anterior and posterior margins ecjiial in length, tlie former Vi'ry slightly the
more arcnate ; surface feebly and minutely tiib-^rculato near the basal angles,
transversely and very feebly im])ressed jnst behind the vertex ; pnnctnres
small, ronudi'd, and irregularly distril)Uteil, more crowded toward the base
and apex. Elytra at base as wide as the head ; sides very moderately diver-
gent posteriorly, much longer than the width at base and rather strongly
arcuat(% more particularly so posteriorly ; together broadly, roundly, and
strongly emarginate behind ; suture one-thini as long again as the pronotum ;
surface convex, narrowly impressed along the suture, more broadly and
strongly so toward the base ; punctures round, feebly impressed, and evenly
distributed, (>xcept in the basal regions, where they are closely crowded ;
intersj)a(u^s gener'iUy as wide as the punctures, distinctly reticulated, feebly
convex, shining. First two abdominal segnionts equal in width, very slightly
nari'ower than the contiguous elytra ; surface (;oarsely, feebly, and somewhat
distantly punctulate at the base, becoming nunOi more linely so toward the
tip ; transverse carinae 4-eHspid, cusps nearly equal in length, somewhat ob-
scurely delined, tliougli rather long. Legs short and slender, dark piceous-
browii ; first joint of the i)osterior tarsi thi'ee-fonrtlis as long again as the
second, equal in length to the last, second somewhat longer than the third,
fourth very oblique, fifth very slender at the base.

Male. — Posterior edge of the fifth ventral segment emarginate in its middle
fifth, emargination evenly rounded, and nearly ten times as wide as d(!ep,
contiguous .iirface cylindrically and rather feebly impressed throughout
anteriorly; sixth broadly and transversely truncate at the apex.

FiiiKite. — Sixth segment broadly and evenly rounded behind.

Length 2.r)-2.7 nun.

White Fisli Point, Lake Superior, 2.

T had sepaiateil the nvAe of tliis 8i)eoie8 under anotlier name, but
afterwards concluded to unite the two specimens, as tliere might
remain a doubt as to their distinctness, due to ti'e difl'erei.ce of sex.
The male diHers from the female in the much coarser aiul more even
punctuation of the elytra and pronoluui, in the pubescence, which is
very much longer and denser, and in the structure of the antennae,
the male having the fourth and fifth joints equal in length. The
description is drawn from the female.

m

Of). S. minor n. sp. — F(/rm slender. Pubescence fine, moderately abun-
dant, rather short and recumbent, cinereous in color. Head moderate, twice
as wide as long ; interocular surface very slightly convex, more than twice

m

COLEOPTERA.

119

as wide uh tlio eye; coarsely, t'losely, and sub-variolately punctata; longi-
tudinal filevation modttratt'ly duvelopcd ; ocular lines meeting at three lengths
in advance; antennae slender, niiich longer than the widtli of liead, dark
piceous, cluh distinct and paler in color; third joint one-half as long again
as the fourth, fourtli and lifth equal, also the sixth and seventh, joints of
club gradually increasing in thickness and length ; maxillary palpi uniformly
dark piceous. Prothorax robust, widest at the middle, where it is just pur-
(H'j)tibly narrower than long and but little wider than the interocular surface ;
sides thence feebly convergent posteriorly and very slightly sinuate; surface
evenly convex, rather evenly punctured; punctures sub-variolate and shal-
low, wider than the interspaces which are moderately shining ; anterior and
jxisterior margins ecjual in length, the former slightly the mor(! arcuate.
Elytra at base as wide as th(! head ; sides very slightly divergent and arcuate ;
together broadly and distinctly emarginate behind ; suture one-aixth as long
again as the p* .lotum ; surface strongly and evenly convex, very evenly
punctate ; punctures sub-variolat»!, shallow, broa(b'r than the interspaces,
which exhibit a minutely granular texturt!. Abdominal segments decreas-
ing regularly and rather rapidly in width, lirst distinctly narrower than the
contiguous elytra; surface convex, minutely granuKte, finely j)unctulate;
border rather narrow ; transverse carina 4-cuspid, cusps extremely short,
rudinu'ntary, and expanded toward tip. Legs dark bi'ownish-piceous, mode-
rate in lengtli, joints of tarsi cylindrical ; lirst joint of posterior one-half {is
long again as the second, next three uniformly decreasing in length. Under
surface of the alxbnuen minutely granulate and finely i)unctulate.

Male. — Surface of fifth ventral segment feebly impi'essed in the middle
fourth of its posterior half, coarsely ])ubescent, posterior edge broadly and
almost imperc(!ptibly emarginate; sixth segtnent broadly truncate at tip;
seventh bearing at apex two well-marked lateral teeth, and upon each a long
coarse seta, longer than the breadth at tip.

Fenuile. — Unknown.

Length 2.3 mm.

Detroit, IMichigtin, 2.

Tlie sexual chanicters in tliis species are very feebly developed.

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90. S. rigidlis n. sp.-- Form moderately robust. Pubescence cinereous,
rather short, and moderately close, nearly uniform throughout. Head
moderate, more than twice as wide fis long; interocular surface Hat, two
and one-half times as wide as the eye, evenly and rather closely punctate :
longitutlinal elevation rather prominent, raised above the general hn-el of
the eyes ; ocular lines meeting at about two lengths in advance ; antennae
nearly black, coarsely setose, rather sleudtM', a little longer than the width
of head, club distinct; third joint one-third as long again as the fourth,
joints three to seven gradually decreasing in length, ten and eleven nearly
equal, much thicker and longer than the ninth ; lirst joint of the maxillary
palpi rtavo-testaceous, next two nearly black. Prothorax thre(!-fourths as long
agaiu as the head, widest a little before the middle ; sides thence gradually
convergent posteriorly and very feebly sinuate ; anttU'ior and j>osterior mar-
gins equal in length, equally and rather strongly arcuate ; length but slightly

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120

NORTH AMKKICAN

gr(\ati'r than tlic width ; surface evenly convex, rather closely and somewhat
unevenly punctate ; interspaces polisheil. Elytra at base a little wirlitr than
the head ; together liroadly, evenly, and rather Htron>;ly eniarginate ante-
riorly and posteriorly ; sides very nioderatidy diverj^ent and arcuate ; humeral
angles well developed ; surface evenly convex and punctate ; interspaces
polished and about equal in width to the punctures ; suture one-fourth as
lonj^ ajiain as the j)roiiotuni. Abdominal segments decreasin,' very gradually
in width posteriorly ; margin rather riarrow ; surface finely find rather closely
punctulatu ; transverse carinae 4-cuspid, intervals nc^arly straight, cusps
very short, obscure at tip ; first segment as wide as the elytra at base, Legs
rather stout, dark fiisco-piceous, tarsi short ; first j<iintof the posterior three-
fourtlis as long again as the second. Under surface piceous-black ; abdomen
finely and closely punctulate, clothed with long recumbent pubescence.

Mule. — Posterior edge of the fifth ventral segment almost inij)erce])tibly
sinuate; sixth segment broadly and very feebly sinuate at apex, almost
transversely truncate.

Fiiiuile. — Sixth segment broadly and somewhat unevenly roundtjil behind,
being just perceptibly j)roduced at tlie immediate vertex.

Length 2.3-2.8 nmi.

Ciimbridge, Massacliusetts, 41.

07. S. ilicertus n. sp. — Form moderately robust. Pubescence very
sparse and line, moderately long, pale llavo-cinereous. Head niodeiate,
slightly more than t.vice as wide as long ; interocular sur 'ace very slightly
convex, two and one-half times as wide as the eye ; souitiwhat coarsely, very
closel; , and evenly punctate, punctures shallow, sub-variolate, and irregu-
larly polygonal ; sulcations very slightly apparent ; ocular lines meeting at
two and one-half lengths in advance ; antennae rather slender, a little longer
than tlie width of iiead, fuscous, basal joint darker, club distinct ; third
joint one-third as long again as the fourth, fourth and fifth equal in length,
sixth almost imperceptibly shorter, eighth sub-globular, joints of club suc-
cessively and uniformly increasing in thickness and length ; first joint of the
maxillary palpi llavo-ttistaceous, second and third uniform in color, fusco-
testaceous. Prothorax widest at the middle, where it is very slightly wider
than the interocular surface and very slightly narrower than long; sides
thence very moderately convergent posterif)rly and straight ; anterior margin
slightly longer and more arcuate than the posterior ; surface regularly ('onviix,
very slightly and transversely depressed just behind the anterior margin ;
very closely, rather evenly, and coarsely punctate; interspaces very narrow.
Elytra at base as wide as tlu; head ; sides almost parallel, slightly ami nearly
evenly arcuate ; together very broadly and feebly tunarginate jiosteriorly ;
suture nearly one-fourth as long again as the pronotiim ; surface almost
evenly convt^x, rather coarsely punctate ; punctures impressed ; interspaces
one-half as wide, shining. First three abdominal segments nearly equal in
"width, and very slightly narrower than the contiguous elytra ; border rather
narrow ; surface convex, shining, finely punctulate ; transverse carinae
4-cuspid, cusps small and somewhat rudimentary. Under surface of the
abdomen dark piceous-brown, finely punctulate, minutely granulate. Legs

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>«:>•:

COLKOPTEUA.

121

moderate, fuscous ; first joint of tlu^ i)osterior tarsi three-fourths as long 'igain
as the second, second notably longer than the third.

Miih'.. — Unknown.

h'liiKili'. — Posterior edge of the sixth ventral segment evenly rounded, but
slightly produced in the middle.

LtMigth 2.5 mm.

Nebraska, 1.

08. M. parallelllS n. 'sp. (S<diwar/. MS.). — F rin modi^rately slender.
Pubescence exceedingly sparse and sliort, almost invisible, except on the
heail and abdomen, cinereous. Head tnoderate, scarcely twice as wid(! as
long ; inten,. ular surface two and omvhalf times as wide as the eye ; densely,
ratlier finely, and evenly punctate; equally trilobed by the distinct, though
rounded sulcations ; ocular lines meeting at about one length in advance;
antiMinae slightly longer than tin? width of head, dark piceous-black, club
mod'M-ate ; third joint one-third as long again as the fourth, fourth and fifth
equal, eighth globular, joints of cluli gradu lly increasing in thickness and
length ; maxillary pal]>i dark piceons-brown, very slightly paler toward the
base. Prcthorax widest just before the middle, wln're it is nearly five-sixths
as wide as the head ; sides thence convergent jiosteriorly and nearly straight ;
anterior and posterior margins equal in length, the former much the more
arcuate; surface rather evenly convex, closely, somewhat irregnlarly, and
variolately punctate ; interspaces seldom wider tlian 'he punctures, shining ;
a shallow medial depression extends longitudinally along the middle half,
widest at the middle. Elytra at base as wide as the head, sides slightly diver-
gent posteriorly and nearly straight ; broadly and rather strongly emarginate
behind, and almost (jqually so at the base ; suture scarcely perceptibly longer
than the pronotum ; surface coarsely, somewhat closely and unevenly ])unc-
tatt^ ; ])unctures slightly variolatt! ; inttuspai'es shining. First thre(' abdo-
minal segments nearly equal in width, ami as wide as the elytra ; border
modiu'ate ; surface polished, punctulate, more fini-ly and closely so poste-
riorly; transverse carinae uuicuspid, cusp very slender and aciculate. Legs
moderate, dark castaneous ; first joint of th(! posterior tarsi two-thirds as long
again as the second, second distinctly longer than the third. Under surface
of the abdomen finely and ratlier closely punctulate.

Male. — Posterior edge of the fifth ventral segment sinuate, sinus feeljle,
and one-third as wide as the segment, surface feebly impressed tlu'dUgh
the same width anteriorly, "-npression rather densely pilose ; sixth segnient
sinuate at apex, sinus nan, w, alxuit twice as wide as <leep, surface convex.

Ffiiiale. — Sixth segment broadly and very evenly rounded behind.

Lengtii 2.7-2.8 mm.

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Cambridge, Massachusetts, 7.

fl!). S. IlOCtivagllS n. sp. — Form moderately slender. Pubescence as
in miinlnnun, but more dense. Head robust, scarcely twice as wide as long;
interocular surface flat, twice as wide as the eye ; coarsely and variolately
punctate ; interspaces acute at the sides, equal in width to the punctures

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DEPARTMENT OF

AGRICULTURE

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122

NORTH AMEIUCAV

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aloiift th(! middle ; longitudinal elevation broad, evenly convex, prominent ;
ocular lines meeting at two lengths in advance; antennae sliMider, somewhat
longer than the width of head, pieeous-lilack, clnh very slender; third joint
three-fonrths as long again as the fourth, fourth and fifth sub-equal, sixth
and seventh snb-e(inal, shorter. join.ts of club elongated, nearly e(|ua! in
length ; maxillary palpi ilark fusco-j)i<reous throughout. Prothorax very
robust, widest before the middle, where it is four-fifths as wide as the head,
and distinctly wider than long; sides strongly arcuate throughout, except at
the posterior margin, where they become very feebly sinuate ; anterior and
posterior margins equal in length, the foi'uier" the more arcuate; surface
evenly convex ; rather finely, closely, anrl evenly punctcate ; punctures
ronnil and variolate ; interspaces fiat, one-third as wide as the j)unctures,
moderattdy shining, minutely reticulated ; the canaliculation is in the form
of a faint longitudinal impression, beginning just before the middle, and
one-half as long as the proiiotum. Elytra at base slightly narrower than
Uw liead ; sides moderately divergent ])osteriorly and feebly arcuate ; just
perceptibly longer than the width at basts togetber broadly and feebly
emarginate behind ; suture one-fifth as long again .'is the pronotum ; surface
feebly impressed along the suture ; rather finely and evenly punctate ; inter-
sjjaces generally one-half as wide as the punctur(!S, shining. First three
abdominal segments equal in width, and as wide as the contiguous elytra ;
border moderate ; surface feebly convex, finely and somewhat closely piuictu-
late ; transverse carinae not cusped. Legs rather long and slender, piceous-
black throughout; first joint of the posterior tarsi four-fifths as long again as
the second, second as long as the third and fourth together. Under surface
of abdonum black throughout.

iftilt: — Posterior edge of the fifth ventral segment sinuate, sinus very short
and distint^t, four times as wide as dee]), apices very broad and nearly trans-
verse ; surface contiguous to sinus, fiattened anteriorly, but siarcely im-
pressed, its border densely and coarsely ciliate ; sixth segment narrow and
elongated, sinuate at apex, sinus nearly as deep as wide, slightly more acute
in cui'valure than the apices ; seventh very broadly and feebly emarginate
at ai>ex.

Ftmtile. — Posterior edge of sixth segment very broadly angulate at ai)ex.

Length 3.3 mm.

New Hampshire, probably White iMountains, 2.

The description of tliis very distinct species has been drawn from
the female, the male beinj;; in an imperfect condition. It has a
superficial resemblance to r/ijficifis, but the absence of cusps from the
abdominal carinae, well developed in the latter, will serve to distin-
giiisii them.

100. S. lliculeiltus n. sp. — Form very moderately robust. Pubescence
long, rather close, line, sub-reoumbent, cinereous. Head moderate, slightly
more than twice as wide as long; interocular surface very feebly depressed,
distinctly more than twice as wide as the eye; etjually trilobed by the very
feeble rounded sulcations ; intermediate surface nearly fiat ; punctures very

wmm

•1!

COLEOPTERA.

123

small, widi-ly S(^i)arat('il, round, aiul evonly distributtMl ; iiitt^rspacps nearly
Hat; (iciilar liiu's iiuM'tiiig at fully tlirco K-uf^tlis in advanot; ; first joint of
antennae black, second jiiceous-black and more slender; first joint of maxil-
lary ]y.i]\>\ tranriluoent, pale i)if'eo-t(^'<taceous, second much darker. Protho-
rax arciiattjly, evenly, and gradually ineriMsing in width to a point slightly
in advaiKuf of •the middh;, wh«a'e it is distinctly narrowi^r than long, and
three-fourths as wide as tin; head ; sides thence moderately conviM'gent and
evenly sinuate ; anterior margin slightly shorter and more arcuate than the
posterior; surface m-arly evtmly conv(!X, llnely, rather distantly, and very
evenly punctate; interspaces scarcely as wide as the punctures, nearly Hat,
highly polished. Elytra at base just perceptibly narrower than the head;
siiles moderately divergent posteriorly, slightly longer tiian the width at
base and rather strongly arcuate ; together broadly, evenly, and feebly
em, "ginate behind; suture one-third as long again as the pronotuni ; surface
ratiier <'onvex, strongly and roundly impressed along the suture, and feebly
so ne-'r the outer apical angles ; siitural impression rai)idly widening toward
the bast ; punctures rather small, round, I'eoiily impressed and very evenly
distril iited ; interspaces as wide as tlu^ punctures, slightly conv(!X, and very
highly polished. First three abdominal segments ecjual in width, an<l as
wide as the contiguous elytra; surface broadly convex, finely, feebly, and
evenly punctulate ; transverse carinae apparently not ensped. Legs short
and slender, piceous-black, slightly paler beneath ; first joint of the posterior
tarsi scarcely one-fourth as long again as the second, second distinctly longcM-
than the third, fourth narrow and very obliijui', fifth longer tlian the first,
very narrow at the base, and widest near the distal extremity.

Mali'. — I'nknown.

FiiiKilf. — Sixth ventral segment very broad and viM'y broadly rounded be-
hind, transversely truncated through a small extent at the immediate apex.

Length 2.8 mm.

Stockton, Calif'orniii, 1.

Tiic iiiiteniiac are missing, with exception of the first two joints;
also tli«; third joint ot" tlie maxillary palpi.

101. S. juvencus n. sp. — Form rather slender. Pubescence long, sub-
recumbent, close, rather coarse, prominent, pale fulvo-cinereous, very dense
on the abdomen. Head moderate, twice as wide as long; interocular surface
flat, twice as wide as the eye, evenly, rather finely, and somewhat distantly
punctate; longitudinal elevation narrower than the lateral portions, feebly
and evenly convex, crest broadly impunctate ; interspaces very highly
polished; eyes small, very convex, clothed thickly with rather long, erect
setae; ocular lines meeting at somewhat more than one length in advance;
antennae as long as the width of head, rather slender, club distinct, piceous-
brown ; third joint one-third as long again as the fourth, fourth slightly
longiT than tlu; fifth, sixth and seventh eijual and abruptly shorter, eighth
very slightly elongated, ninth as wide as long, much smaller than the tenth,
tenth and eleventh equal in width, the latter slightly the longer, and obtuse
at ti]>; maxillary palpi moderate, pale piceous-brown, first joint i)aler and
testaceous. Pnthorax widest at the middle, where it is four-fifths as wide

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124

NORTH AMKUICAN

as the lii'ail, anil slightly narrower than long ; sides thence almost equally
convergent anteriorly ainl posteriorly, slightly arcuate in the former, and
feehly sinuate in the latter direction ; anterior margin very sliglitly longer
and more arcuate than the posterior ; surface very evenly convex, rather
finely, distantly, and evenly punctata ; i)nnctures rounded and deeply im-
pressed ; interspaces feehly convex and very highly polished. Elytra at
base distinctly narrower than the head ; sides rather strongly divergent
])osteriorly, much longer than the width at hase, and feehly arcuati^ much
more strongly so toward the apices, almost straight near the hase ; together
broadly, roundly, and very feehly emarginate behind ; suture from one-fourth
to one-fifth as long again as the proiiotnm ; sui'face rather dejjressed, very
even ; finely, vrry distantly, an<l rathi-r evenly punctate ; punctures ini-
])ressed ; interspaces very feelily convex and Ixaving an extremely liigli polish.
First two ahdominal segments equal in width, and as wide as the contiguous
elytra, the remainder decreasing uniforndy and very grailually in width ;
snrfacre very broadly convex, highly jiolished, coarsely, evenly, and distantly
punctulat(! ; transverse carinae not cusped. Legs rather long and slender,
dark rufo-piceous above, paler lu'in^ath ; first joint of the posterior tarsi
three-fifths as long again as the second, slightly longer than the fifth, second
slightly longer than the third, fourth much shorter, fifth very narrow at the
base, becoming very thick at tip.

Mdh'. — Fifth ventral segment not appreciably modified ; sixth broadly and
transversely truncrte at apex, truncation rounded at the sides, and giving a
mere suspicion of sinuosity in the nuddle.

Feiiiiili', — Unknown.

Length 2.1 mm.

Detroit, Miciiigan, 1.

Tlie sexual cliaructers are extremely feeble ; the species is other-
wise well mark<Hl.

102. S. paiipercilllis n. sp. — Form moderately slender. Pubescence
long, clos<', rather coarse, semi-ert^ct, and very pale tlavo-cint>reous, j)ronii-
nent. Head moderate, rather more than twice as wide as long ; iuti-rocular
surface nearly Hat, twice as wide as the eye ; punctures rather small, deep,
close, evenly distributed, and irregularly polygonal, somewhat confiuent
anteriorly; interspaces narrow, very convex, and highly polisheil ; longitu-
dinal elevation somewhat narrower than the lateral portions, rather acutely
ridged ; ocular lines nuieting at about two lengths in advance ; first two
joints of antennae piceous-brown, sub-<Hiual : eyes rather short, very convex,
clothed with very short, erect setae ; maxillary palpi rather short, last joint
strongly clavate, pale piceo-testaceons throughout. Prothorax arcuately and
rather rapidly widening to a point nearly three-fourths the length posteriorly,
where it is three-fourths as wide as the head and distinctly narrower than
long ; sides thence moderately convergent and sinuate ; anterior margin much
shorter and more arcuate than the posterior ; surface nearly evenly convex,
with an extremely feeble tuberculiform swelling near each basal angle,
and a very feeble transverse impression just behind the anterior margin ;
rather coarsely, closely, and evenly punctate ; interspaces narrow, convex,

COLEOPTEKA.

12")

anil liiglily polisliiMl. Elytra at l)fiso slightly iiarrowt-r than tin' head ; h'uU'm
fei'hly divergent posteriorly, much longer than the width at base, very f'eehly
arcuate, most strDnjjly so posterioily ; toirether hroailly, roundly, and mode-
rately eiiiarginate \iehind ; suture rather more than one-fourth as long again
as the pronotum ; surface very f(!ehly imjiresaed along the suture, more
strongly so toward the hase ; rather finely, moderately closely, and evenly
liunctnte; punctures round and impressed, clo^^ely crowded and ]iolyg(Uial
near tlie inner basal angles and along the suture, but apparently never
coalescent. AbJominal segments decreasing uniformly and somewhat rapiilly
in width, first distinctly narrower than the contiguous elytra ; surfact^ rather
convex, coarsely, and I'atiier closely ])unctulate, becoming mor(? finely so
toward the tip; apices of the segments impunctat(! ; transverse carinao not
CHsped. Legs rather long, dark fuscous above, much paler fusco-testaceous
beneath, femora stout; first joint of tlie jiosterior tarsi two-thirds as long
again as tlie second, distinctly sliorter tiian tiie fiftli, second much longer
than the third, third slightly longer than tlie fourth, fifth slightly narrower
at the base than at the apex.

Mule. — Fifth ventral segment not appreciably moilified ; sixtii very broadly
sinuate at apex, sinus occupying nearly the entire apical width, evenly
rouiiiled throughout, from ten to twelve times as wide as deep ; seventh very
broad at ai)ex, where it is moderately euiarginate, bottom of emargiiiatiou
transverse.

FiinaJe. — Unknown.

Length 2.2 mm.

Lociility uncertain.

The iintenniie are missing. Tlic species is quite di.stinct and is
probably from Michigan.

103. S. liaplliS n. sp. — Form slender. Pubescence short, sparse, and
moderately coarse, pale flavo-cinereous on the head, pronotum, and elytra,
shorter, more recumbent, and cinereous on the abdomen. Head moderate,
twice as wide as long ; interocular surface flat, nearly two and one-half times
as wide as the eye ; closely and rather coarsely punctate ; sulcations scarcely
visiblt! ; punctures sub-variolate ; antennae about equal in length to the
width of head, rather slender, dark blackish-piceous, coarsely setose, club
moderate or small ; third joint one-fourth as long again as the fourth, joints
three to six uniformly and grjidually decreasing in length, last two joints
much larg.'r than the ninth, equal in thickness, eleventh acuminate at tip.
Prothorax widest just behind the middle, where it is notably wider than the
interocular surface, and slightly narrower than hnig ; sides thence moderately
convergent posteriorly and strongly siiiuati-; anterior and posterior margins
equal ill length, e<iually though feelily arcuate : surface evenly convex,
closely and evenly punctatt;; punctures small, regul'ar, and somewhat vario-
late ; interspaces one-half as wi<le as the punctures, polished. Elytra at base
just ])erceptibly narrower than the head ; sides but very slightly divergent
posteriorly, straight in the middle three-fourths ; together broadly and feebly
emarginate behind ; suture one-sixth as long again as the pronotum; surface
atlier evenjy convex and evenly punctate ; punctures similar to those of

■1 1

Wr.

\U,

m

126

NORTH AMEHICAN

tlin jii'oiKitum; iiitcrspnces ('(iiial to tlii'iii in wiiltli, jiolisln'il. Abdominal
scfjiiiiMits ii('('i't'asin)i n-gularly iuid very f,rmlii!illy in widlii, lli-st as wiiii' as
tilt' contigiions elytra ; bordisr proniiniMit ; surface convex, jiolislieil, finely
punctulnte ; transverse earinae not cnsped. Legs dark brownish-blaek,
moderate in length ; lirst joint of tlie jjosterior tarsi one-lialf as long again an
the second. lln<ler surl'ace of the ulxlonien shining, wry finely gniniilate,
finely and somewhat distantly piinctulate.

Mull', — Unknown.

Fmuili;. — Sixth ventral segment evenly rounded behind.

Length II. 9 mm.

t
Detroit, Micliigiiii, 2.

104. §, eilOdis n. sp. — Form moderately slender. Puheseence rather
long, recumbent, cinereous, quite close and evenly distributed. Head mode-
r.'ite, twice as wide as long; interocular surface nearly flat, rather closely
and finely j)unctate, two and one-half times as wide as th(^ eye?; longituilinal
elevation obsolete ; ocular linea meeting at two lengths in advance ; antennae
piceous-bla(;k, (Uiual in length to the width of head, slender, club distinct;
thinl joint ('(jual in length to the fourth, last two joints e(jnal in size, ninth
much smaller; first joint of maxillary palpi testaceous, second and third black.
Prothorax widest at the middle, where it is four-fifths as wi<le as the head ;
sides thence convergent posteriorly and sinuate; very slightly longer than
wide ; anterior and posterior margins e(iual ; surface evenly convex and finely
punctate ; interspaces generally narrower than the i)unctures, shining.
Elytra at base nearly as wide as the head ; sides feebly divergent posteriorly
and slightly arcuate; together broadly and feebly emarginate behind, more
strongly .so at the base ; suture one-eighth as long again as the pronotum ; sur-
face evenly convex, with the exception of a scarcely perceptible depression
along tlu! suture; rather finely ininctate ; punctures shallow; interspaces
narrower anteriorly, and broader posteriorly than the width of the punctures,
shining. First four abdominal segments of equal width, and as wide as the
elytra: border very broad ; surface shining, finely and rather closely punc-
tulate ; transverse carinae not cusped. Legs dark blackish-piceous, rather
slender, tarsi moderately robust; first joint of posterior three-fourths as long
again as the second, second scarcely perceptibly longer than the third. Under
surface of abdomen very finely and closely punctulate.

Mule. — Unknown.

Feiiiiilc. — Posterior edge of the sixth ventral segment broadly and evenly
rounded behind.

Length 2.8 mm.

Veta Pass, Colorado, 1.

I found this s[)ecips labeled S. mon'o Grav., but as it differs in
several important particulars Iron) tiuxt species, as described by
Kraatz — notably in the structure of the antennae and tarsi — 1 have
concluded to describe it as new.

COLKOPTKUA.

127

llTf. S. (lives n. sp. — Form ratlu'f robust. I'lilicHceiict! somcwliat loii;^,
Hub-rccunild'iit, conrse, close, cineroniis, and soniewliat coimpiouous. Head
small, roliiist, distinctly li'ss tlian twici' as widt" as lonj,' ; intcrofular siirfaci!
broadly an<l t'cobly dcprcsscil, two and oni lialf times as wide as the cyo ;
tMiually trilobed by tho \ cry feeblo, roundod Hubsttions ; intcrnuMliatc siirfauo
evenly and very feebly convex ; punctures very cbise, round, and evenly dis-
tributed ; antennae soinewliat longer tban tbe widtli of iiead, ratlier rohust,
coarsely and sparsely setose, dark piceons-brown, basal joint black and dis-
tinctly more robust tban tbe second, club distinct ; tbird joint one-tliird as
long again as tlie fourtb, foiutli and liftii eijual, sixtli somewbat slnuter tlian
the seventh, sub-eiiual in thickness, eighth as robust as the seventh, nearly
twice as long as wi<le, joints of club increasing nniforndy an<l very gradually
in length and thickness ; maxillary palpi rather slender, piceous-black, basal
joint ]>iceo-testaceous. Prothorax arcuately, (n-enly, and vi'vy gra<lually
widening to tbe middle, where it is more than live-sixths as wide as tho
head, and distinctly narrower than long; sides thence moderately conver-
gent and ratlier fe(d)ly sinuate ; anteriiw margin longer and more arcuate
than the posterior; surface evenly convex, fundy ami evenly punctate;
interspaces nearly as wide as the punctures, nearly Hat, highly ]>olished.
Elytra at base as widt> as the head ; sides rather feidily divergent posteriorly,
much longer than the width at base, and somewbat feebly arcuate, most
strongly so posteriorly ; together broadly and very feebly emarginate behind ;
suture one-fourth as long again as the ])ronotum ; surfa(!e lincdy, feebly, and
evenly punctate ; interspaces much narrower toward the base, generally fi'cbly
convex and highly polished. Abdominal segments decreasing nniforndy and
very gradually in width, first nearly as wide as the contiguous elytra ; surface
very finely, somewhat closely and evenly jmnctulate ; transveise carinae not
cusped. Legs moderate, piceons-black throughout ; li:'st joint of the poste-
rior tarsi one-half as long again as the second, much shorter tban the tifth,
joints two to four uniformly and rapidly decreasing in length. Hody winged.

^f(tll'. — Posterior edge of the fifth ventral segnunit feebly emarginate in its
middle third, emargination (evenly rounded and sciHOt-ly measurable, con-
tiguous surface very feebly Hatteninl ; sixth sinuate at apex, sinus narrower
and much more acutely rounded than tbe apices, sides m^irly straight,
slightly more than three times as wide as deep ; seventh segment trans-
versely truncate at tip.

Juiiiale. — I'nknown.

Length ;i.] nmi.

Nortliern California, 1.

10(t. S. SUbgriHeilS n. sp. (Schwarz MS.). — Form rather slender, sides
parallel. Pubescence sligiilly more plentiful on the head and elytra, through-
out rather long, tlavc cinereous in color. Head moderate, a little more than
twice as wide as long ; interocular surface nearly Hat, rather coarsely punc-
tate ; punctures distinct and setigerons ; longitudinal elevation broad and
scarcely visible ; ocular lines meeting at one length in advance ; antennae
short, equal in length to the width of head, third joint one-third as long
again as the fourth, joints four and five of equal length, club well developed.

,t,.

'•Us

'in

€

I

T^

128

'NOKTII AMKUICAN

ti'iitli aiifl oli'vcTith jdintrt loiii^cr anil tliirki'i- tliaii tlic ninth, I'qnal, of a dark
fuscous tint ; lirst joint of tlm maxillary palpi dark llavo-ti'staccous, second
and third dark hlackish-fuscous. Prothorax short and rohust, three-fourths

>ng again a

in as tliK head,

di'st h

till' iniildii', whi-ri' it is ncarlv as

widf as long ; sides tlienee eouverging vory gradually and very fetdily sinuate ;
posterior margin slightly narrower and more areuattf than the anterior ; sur-
face evenly convex, rather finely |>unctate; interspaces ahout eipial in width
to the ininctures. Elytra at liase eijual in width to tlie head ; together rather
deeply einarginato at the hase, very broadly and feebly so behind ; sides hut
slightly divergent, arcuate; suture onelltih as long again as tlie pronotuiii ;
surl'aei' rather convex ; punctures ratlicr tine, ini|iressed, setigeroiis ; inter-
spaces slightly greater than the width of the punctures, highly polished.
Abdominal segnii-nts decreasing vi-ry giailually in width, lirst almost as wide
as the elytra: surface vi'vy sparsely and linely punctate, shining; border of
lirst four segments moderate ; transverse cirinae not euspinl. Legs [liceous-
black, tarsi a little paler, rather robust; lirst joint of the posterior one-half
as long agi'.in as the second. Under surface black, abdomen very finely and
rather closely iiunctati-.

^/tll,t. — Posterior edge of the tilth ventral segment very feebly sinuate,
sinus one-third as wide as the segment, surface evenly convex ; sixth sinuate

at apex, sinus o

lie-half as wide as the segment, twici

e as wiile as deep

tiguous surface feebly and longitudinally impressed.

Female. — Sixth segment broadly and evenly rounded behind.
Length 2.8 mm.

Calit'orniii, 1 ; IJritisli Columbia, li"».

lt'7. S. teri'icola n. sp. — Form rather rohust. Puhescence erect, rather
short, line, moderately abundant, cinereous. Head scarcely twice as wide as
long; interocular surface a little more than twice as wide as the eye; nearly
flat, very closely, finely, and regularly punctate ; punctures variolate ; nearly
e(i\ially trilobed by the shallow sulcations ; ocular lines meeting at nearly
three lengths in advance; antennae slender, dark reddish-black, coarsely
setose, third joint one-third as long again as the fourth, joints four and live
equal in length ; tirst joint of maxillary palpi dark testaceous, second and
third black. Prothorax widest slightly before th6 middle, where it is live-
sixths as wide as the head, and almost as wide as long ; sides thence con-
vergent posteriorly and straight; posterior margin slightly shorter than the
anterior ; equally, feebly arcuate ; surface evenly convex, closely, somewhat
evenly and finely punctate; j)unctures sub-variolate; interspaces narrower,
moderately lustrous. Elytra at hasi' wider than the head ; sides almost im-
perceptibly divergent posteriorly, and very slightly arcuate ; together broadly
emarginate anteriorly, and vvvy broadly and more strongly so posteriorly ;
sutur*! nearly ont!-fourth as long again as the pronotum ; surface evenly con-
vex, rather evenly and linely punctate ; punctures feebly impressed, some-
what wider than the interspaces, which are lustrous. First three abdominal
segments as wide as the elytra at base; border strong; surface rather Hat,
and very linely j)unctulate ; transverse carinae not cusped. Legs modt^rate
and rather slender, piceous-black ; first joint of the posterior tarsi two-thirds

it

COLKOl'TKUA.

120

ns loll;; a;,'niii ns tlic sccoiul, sccfuiil iiiiicli ImifiiT tluni tlic third. UikIit
Murfnco of tlid aliiliiini'n sliiiiing ami somcwliat iimri) (joarscly iimirtiilatc
tliaii t)i(t u|)])('r,

Miilr. — I'ostt'rior 0(1^0 of tho nixtli ventral scgnu'iit Hiiiuatt<, siiuis oxft't-il-
iii^'ly fiH(l)lH, one-third as wido nH tliH Hfgiiiciit.

FeiiKilr. — IJllkllowil.

I.i'li^'th 'J.tl uilii.

Iiiii\(^ 'I'lilioe, Neviulii, 1.

The iuiteniml dubs im; inissiti},' in (lio only known specinion.

Itis. S. .:lllli«lllllis II. sp. — Form moderately rohiist. Piibcsuciu't' rathor
short, cinereous, more abundant on the head and elytra. Head small, three-
fourths as wide a^'ain as long; interocular surface very moilerately excavated,
strouijly l)isulcat<', three times as wi(h^ as the eye; llnely and variolately
punctate; interspaces wider than tlie punotures, shiniuj;; longitudinal ele-
vation as wido as the eye; ocular limis meeting at o\u\ length in advance ;
antennae! longer than the width of head, piceous-hlack, rjither slemler, clul)
large ; third joint twice as long as the fourth, fourth and fifth e(iual, sixth
and seventh e(iual, much shorter, eighth almost globular, joints of club very
gradually increasing in length, teiitli slightly thickest ; palpi and lU-al organs
entirely piceous-black. Prothorax very robust, widest a little hel'ore the
middle, whert^ it is four-lifths as widi; as the head ; sides thenuo convergent
posteriorly and slightly sinuate; surface with a broad transverse impression
just behind the anti'rior margin, and a ratlier deep (ibli(iue iini)ressiou on
each side near the middle ; vei'y I'-iely punctate ; punctures very shallow and
variolate; interspaces wider than tlie punctures, shining; anterior margin
slightly longer than the posterior. 151ytra at base hroadly and rather deeiily
emnrginate, slightly wi<ler than tin; head ; together broadly and just jiercep-
tibly eniarginate posteriorly ; suture one-lifth as long again as the pronotuiu ;
si(b'S very slightly divergent ]iosteriorly and moderately arcuate ; surface of
each with a broad, irregular, and longitudinal elevation along the middle,
punctate like the pronotnni. Abdominal segments decreasing rather rapiilly
in width, first as wide as the contiguous tdytra ; border very strong ; surface
shinirig and very finely punctate ; transverse carinae not cusped. Under sur-
face of the abdomen very finely and rather closely punctate. Legs Idack,
rathi'r long and slender ; first joint of the posterior tarsi twice as long as the
second.

Mule. — Posterior edge of the sixth ventral segment very broadly sinuate,
sinus evenly rounded, about one-fifth as deep as wide.

female. — Sixth segment very broadly and triangularly produced, surface
densely liirsute.

Length 3.7-4.1 mm.

Thurston County, Washington Territory, 2.

109. S. tuberculatlis n. sp. — Form rather slender. Pubescence very
long, somewhat dense over the entire surface, pale fuscous in color, erect.
Head moderate, twice as wide as long ; interocular surface nearly flat, three
Stenini. 9

■

( .V'

?:rf'

it

m:

180

NORTH AMRHICAN

timcH IIS wide ha tlio eye; dfoply, coftrnely, niul rntlicr doHt'ly piiiictntt' ;
l()ii>;ituiliiial clcvatiDii very iinnniiH'iit ; ftuti'iiiiiir slfiiclcr, ('(iidiI in Iciijitli
to till' width <pf lifiid, unit'iiniily fii^co-tcMtiU'i'uiis, riiili wi'il dcvt'li)i>i'd ; tliird
joint but vi'ry xliKlitly Idngt-r tlinn tliK fourth ; joints of (dub griidniilly in-
cn-asinj; in hMi^tii and tliickncMn, lant j<.int acuniinafoat tip; <Mitirc antfuna
bristling; witli lon^' sctai- ; t-yi-s coarjudy Hctoso ; paljii iniil'i)rinly llavo-tfsta-
ceouB. Prothorax widi'Ht just bfl'orc tin- niiddlo ; sitlcs tlitMU'o tiKidcratidy
convcrfjiMit posteriorly and ffidily sinuate ; length Hlij;htly greater than llie
breadth ; anterior and posterior nuuxins ei|nal and arcuate; surface coarsely
and iiref;ularly punctate and tutierculjite ; interspaces jxdished. Elytra at
base very .••li^jhtly n.'irrower than the head ; sides very moderately divei'j,'ent
posteriorly and arcunto ; to>;etlier broadly and very fenbly omarginato behind ;
Huture one-liftli as loiif; aj;ain as the pronotuni ; surface coarsely and irregu-
larly puni'tate ; punctures impressed; iiitersiiaces hif,'hly iiolished ; on each
elytron there are threts tuberculiforui tdcvations. Abdominal sugmnntfl
(b'creasing very moderately in width, first nearly as wide as the adjoining
elytra; border prominent; surface shining and rather coarsely punctate,
tranH"HrHe carinat! not cusped. Legs short, fusco-testaueous, hirsute ; tarsi
very jiale in cnlor ; first joint of the posterior efjual in ItMigtli to twice the
second, second e(|ual to the third. I'mU'r surface of the ahdoiucn lilackish-
piceous, coarsely and distantly punctate, bristling with long erect setae.

Mule. — Posterior edge of the sixth ventral segnusnt broadly and trans-
versely truncate ; seventh deeply emai'ginati^ at apex.

Fiiiitilr. — Sixth segnu'iit broadly and triangularly produced posteriorly,
with the apex rounded.

Length 2.3-2.G mm.

Florida; Siiiul Point, "> ; Enterprise, 1.

Tliis sjHiL'ies niuy be very readily recognized by tiie irregularities
of the siirtace, there being ten very apj)arent tubereiilations — tour on
the pronotinn and six on the elytra — as well as by its very bristling
and hirsute a|)i)earance.

110. S, ilidistiliclus n. sp, (Sclnvarz MS.). — Form moderately slender.
Pubearenc(t rather short and close, ciner(!ous in color throughout. Head
moderate, twice as wide as long ; interooilar surface about two and one-half
times as wide as the eye, very feebly excavated and closely punctate ; jmnc-
ture« variolate ; longitudinal elevation scarcely evident; ocular lines meeting
at one and oi>(!-half lengths in advance; antennae nearly black, modi^'ately
robust and rather linely setose, club moderate, third joint one-third as long
again as the fourth, joints of club gradually increasing in thickness and
length; maxillary palpi reddish-brown, first joint a little paler. Prothorax
widest at one-third its length from the anterior margin, where it is four-fifths
as wide as the head ; sides tlionce rather rapidly convergent and almost
straight ; length one-fifth greater than the breadth ; anterior margin slightly
longer than the posterior, equally arcuate; surface very slightly and trans-
versely impressed near the anterior and posterior margins, very closely
punctate ; punctures variolately impressed ; interspaces narrower than the

',«

COLEorTEIlA.

181

piuictnrcs, Hliininfj. Elytra nt Iimhv somcwluvt nnrrowvr tlian thf li<a<l ;
tdjfctlMT ili'<'|il_v <'iii;irj,'in;itf at tin- ha^"', hroa'lly aii<l niori' ffclily ho ipostc-
ricirly ; mIcIcm ratlii-r Mtniii;;ly iliv('r>;<'iit, an-iiatu ; Hutiirc oiu- i'ij;litli a.s loiii^
again tin tlic prnnutiun ; Hurfaco convex, iinpnvstxl along tliu sutuiv, .-vcnly
{Mnu-tnti' ; l)un(tiir<'rt iiiiprfSHcd ; intci'.x|>a('<'.-i alioiit <'<|iial in ui<ltli to tlm
Iiinicttires. First lour •alxloiiiiiial Hi'<;ni<'nls <'<iiia' in wi<itii, a.>* wi<l«> as tin*
(^onti^'UouH clytia ; iKirdcr \v<'il luarkoil ; Hurfaro Monicwhat clo8«'ly and very
finely ]iiin('tiilati', MJiiniii^'; transversa carinao not cnsiicd. Legs ratlior
slciidci', {tii't'otis-lilHi'lv ; lirst joint of tliu posterior tart*i e<jiiai in leii^tii to
twice tliu seoond. Under Kiirfaet? Idack, sliining.

Mull'. — I'osterior ed<,'e of the liltli ventral segment very liroailly ttn<l leeldy
sinuate; sixth liroadly sinuate at a|)<'\-, dejitli of sinus e<|inil to oiie-tliinl itd
width, ratlier acutely roumled at tin* lioltoni.

/'(•/«(//(. — .Sixth scgHiont Inoadly aJid evenly roun<led behind.

Li'n;,'tli 2.(J-2.!) mm.

Detroit, Mic'liigati, 1;'».

This species gieatly rcseniMes svhi/rispiis, from wliieli it difli-rs in
tin' luitiire innl [xinetiinlidn of (lie interfu'iilar surfiu-c, iimi notnlily in
tin; .structure of the pidtlioriix, the trausv<Tse depre.ssion in liie .sur-
face just behind tiie anterior niar<;in heinj;; entirely ah.sent in siihyrl-
sens, and the punctuation being much more distant and les.s varioiatfi
in tlie latter; tiie lenjitii of tiie proiiotutn is also h-ss. The punctua-
tion of the ab(Ioin(^n is nnicii closer in imfistitivtus. The s(!xual
characters are (piitc .similar. Many of tlie .specimens were taken in
mid-winter.

111. S« bruinalis n. sj>. — Form moderately elcmj^ated. I'ubescencu of
entire body loni; and aimndant ; palo fusco-cinereoiis in color on the head,
])ron<>tuin, an<l idytra, cinereous, and more dense on the ali(b>nien. Head
moderate, slightly more than twice as wide as long ; interocular surface
about twice the width of the eye, very slightly excavated and closely punc-
tate ; jtunctures not coalescent ; longitudinal elevation well marked, carini-
form ; ocular lines meeting at alniut one ami one-half lengths in advance;
antennae rather short and stout, densely and coarsely setigerous, dark
piceous-brown, al»out e<iual in length to the width of head; third joint but
slightly longer than the fourth, thre(( to six gradually decreasing in length,
ten and eleven n\uch longer and thicker than the ninth. Prothorax widest
at the middle, where it is nearly as wide as long; sides tlience gradually
convergent posteriorly and slightly sinuate ; anterior and posterior margins
slightly arcuate and nearly e<[ual in length ; surface evenly convex, closely
pun(!tate ; inteispaces rather less in width than the punctures, shining.
Elytra at base about equal in width to the head ; togtithi-r broadly and evenly
emarginate at the base and apex ; sides almost imperceptibly' divergent,
arcuate ; suture one-fourth as long again as the pronotum ; surface uiujvenly
convex, rather closely and finely punctate ; interspaces about equal in width
to the punctures, highly polished. Abdominal segments decreasing rather

132

NORTH AMERICAN

rapidly in widtli ; Ixirdcr moderate ; surface ratlicr closely and Hnely punc-
tat(^ ; transverse earinae not cnsjied. Legs rather dark fiiseo-piceous, sonie-
vliat sliort and stout; first joint of the posterior tarsi cujual in length to twice
the second, joints two to four equal in lengtli. Under surface black, shining,
Maxillary i)alpi having the first two joijits pale testaceous, third joint darker.

J/((/« .— I'nknown.

Fiiiiitit'. — Sixth ventral segment having the apex pro<1uced in the form of
an excei'dingty broad triangle.

Length 2.1-2.3 mm.

Detroit, Michigan, 2 ; Ann Arbor, Michigan, 1.

Division C.

This, th<' conchuling division of the genus Stenns proper, as here
considered, is composed of species very easily recognizable, by the
absence of a distinct lateral border on tlie abdomen, wlien viewed
from above.

Tlie section was proposed by Erichson, and has been followed by
all authors who have treated the subject ; still discretion is necessary,
as the border is always present on the first segment to a greater or
less degree ; elsewhere, however, it is obsolete, being notliing more
than the fine suture along which the dorsal and ventral surfaces of
the segments are joined. Tiiere are rare cases where a slight border
is also a|)parent toward the bases of several segments after the first.

The following scheme may assist in identifying our limited nimiber
of sj)ecies; they are all small and for the most part slendei in outline,
with the abdomen cylindrical ; they generally have all the integu-
ments roughly and dee[)ly sculptured.

Punctures of elytra isolated and distinct, not coalescent.
Robust, very convex, nearly cylindrical, densely pubescent, very coarsely

punctate 112. gratiosus.

Much more slender, depressed, very sparsely pubescent, finely punctate.
Elytral suture just perceptiblj- longer than the pronotum. New Hamp-
shire 113. nionticola.

Elytral suture nearly one-third longer than the pronotum. Lake Supe-
rior 114. curtiis.

Sculpture of elytra consisting of move or less coalescent punctures ; generally
very roughly, deeply, and tortuously channeled.
First joint of the posterior tarsi more than twice as long as the second.

115. alacer.
First joint of the posterior tarsi distinctly less than twice as long as the
second.

Transverse earinae of abdomen 4-cuspid 116. hirsutus>

Transverse earinae tricuspid. ,

/

COLEOPTERA. 133

Elytral suture not more tlian one-fourth longer than tlie pronotuni.
Coalescent punctures of elytra forming long tortuous channels.
Base an.l apex of protliorax ecjnal or suh-eiaial in length.
I'rothorax widest at the middle.

Hides of elytra strongly arcuate 117. vestalis.

Sides of elytra nearly straiglit 118. talioeiisis.

I'rothorax widest l)ehind the middle 110. iiiilllllO>US.

Protliorax widest before the middle 1:20. piigetl'lisis.

A]>ex of protliorax longer than the base.

Under surface of the abdomen polished, minutely and distantly

punctulato lUl. TilCUlls.

Under surface! of the abdomen coars(dy and closely punctiilate,

interspaces granulose and fe»d)ly shining 1:22. amicus.

Punctures of elytra not coalescent in long and tortuous channels,

and not joined in sets of more than two or three 123. exilis.

Elytral suture two-thirds longer than the pronotum.

124. californiciis.

112. S, gratiosiis n. sp. — Form very robust. Pubescence long, dense,
rather coarse, sub-recumbent, cinereous. Head small, very short, mucli
more than twice as wide as long ; interocular surface twice an wide as the
eye, convex; sulcations feeble, rounded ; intermediate surfice very strongly
and somewhat acutely convt^x, conspicuous ; punctures very closely ci'owdcd,
irregularly polygonal, very coarse; ocular lines meeting at two lengths iu
advance; antennae slightly longer tlian the width of h(»ad, robust, dark
piceons-brown, darker towai'd the base, club large ; third joint one-fourth as
long again as tlie fourth, joints four to seven uniformly and vvvy gradually
decreasing in length ; seventh slightly thicker tlian the sixth, eighth one-
half hunger than wide, as thick as tin? seventh, joints of club increasing
nniforndy and rapidly in length and thickness ; maxillary palpi somewhat
short and rohust, dark piceous-black, first joint translucent, dark piceo-
testaceous. Prothorax robust, arcuately, evenly, and rapidly increasing in
width to a point distinctly in advance of the middh!, where it is live-sixths as
wid(? as the head, and as wide as long ; sides thence rather rapidly conv(M-gent
and distinctly sinuate ; anterior margin slightlv shorter and more arcuate
than the posterior ; surface very feebly tiiberculate near the basal angles ;
coarstdy, ratln^r closely, and evenly punctate ; punctures r'uiiid, deeply
impressed; interspaces one-half as wide as the punctures, convex, highly
polished. Elytra at base as wide as the head; sides rather strongly diver-
gent posteriorly, equal in length to the width at base, modtu-at<.'ly arcuate,
strongly so toward the apices ; together broadly, roundly, and strongly emar-
ginato behind; suture one-sixth as long again as the pronotum; surf'i;e
strongly convex, very feebly and narrowly impressed on the suture at the
base; coarsely, rather closidy, and evenly punctate ; interspaces one-half as
wide as the punctures, c(nive.x, highly polished. Abdominal segments de-
creasing uniformly and rather rapidly in width, first slightly narrow((r than
the contiguous elytra ; surface very convex, coarsely, clos<dy, and evenly
punctulate, highly polished ; transverse carinae 4-cuspid, cusps equal iu

m

m

it

ir,i

NORTH AMKItrCAN

Icii^'th, IfMif; and aciciiliir. Legs slifn't n\u\ rnlxist, pict'oiis-M.'K^k alwivc,
dark picco-fuscims lieiicatli : liist joint of tlic i)osttM'ior tarsi two-tliirds as
loi):; a^rain as tin; sccoml, lil'tli iniirli lonficr flian tlif first anil nion- .<lcn(i<'r.

Mule. — Sixth vcntr.'il scgnn-nt broadly and niodcratidy sinuati- at tii>; til'tli
not apprt'c'ialily modilicd,

l-'cimilc. — Cnknown.

LtMigth 2.li nun.

Dtdroit, ^Ii(dii<j;iiii, 1.

I iini not cnlin^lj cfM'tniii oC tin- sexual cliaractcrs in this sp<'(:ies,
owin^i lo the insitilation of tli<* type; it i« a vciy distinct species.

1 1 '.'>. S. niOIlticolit n. sp. — Form inoilfratidy robust. I'ubcsccnfc inodc-
raicly hmi,', cxcci'din^jly fine and sparst^, more plentiful on tln^ alHlomen,
cinereous. Head two and one-half times as broad as Ions,'; interoeular sur-
face two and one-half times as wide as the eye, eoarsely and <iuite rej^'iilarly
])nnetate ; interspaces shining ; lon},'itudinaI elevatiipu rather acute and above
the ;.'eueral level of the eyes, surface j^radually dedivius ' iterally to that
])lane; oeiilar liiK's very short, ineetinj; at about three lengths in advance;
nnteiinai" |>iceous-l>laek, about eipial in len;,'th to the width of head, club
rather l;ir;,'e; third joint oue-fourtl: as huig aj,'aiu as tlie tdiirtb. joints four to
eijrht i;radually and uniformly decreasing in length, joints oi' elub increasing
in length and thickness; maxillary jialpi short, pici'oiis-black. l>asc sliglitly
paler. Prothorax rolnist, widest at or sliglitly liidiind the middle, wliere it
is four-lifths as wide as thi heail, and just perceptildy i\ai'rower ilian long;
sides thence convergent posteriorly and feebly sinuate ; posteri(U' margin
shorter ancl slightly less arcuate than tht? anterior ; surface evenly convex,
coarsely punctate ; punctures deeply impressed ; interspaces gentu-ally eipial
in width to the punctures, highly lustrous. Elytra at base very slightly
narrower than the bead ; siiles very slightly divergent posti^riorly and dis-
tinctly arcuate ; together broadly, rather strongly, and evenly eniarginate at
the base and apex ; suture just ptu'ceptibly longer than tli(> pronotum ; sur-
face evenly convex, very coarstdy, and somewhat distantly punctat4!; jjunu-
tures dei'iily impresseil Mn<l generally narrower than the interspaces, which
are highly lustrous. First three; abdominal segments as widi' <i.; the elytra ;
border feeble; surface convex, lustrous, finely and distantly puujtulate ;
transver-ii; carinae 4cuspid, cusps short, line, expanded toward tip, intervals
fetddy sinuate. Legs moderate, piceous-black, paler toward the tarsi ; first
joint of posterior tarsi one-half as long again as the second. Under surface
of the abdomen piceous-black, moderately shining, very finely and idosidy
punctulate.

Mitl<\ — Posterior edge of the sixth ventral segment broadly and evenly
eniarginate in its middle! two-thirds, emargination very feeble, (evenly rounded
tliroughout.

Ju'inale. — Sixth segment produced in the form of an exi;cediugly obtuse
angle.

J.ength 2.3-2.6 mm.

White Mountains, New Hampshire, 4.

COLKOI'TF-.KA.

135

114. S. cill'tllH 11. sj). — Form latlicr rolnist. I'liln'sceiice somewhat
Hpiirst!, vi-ry (iii<-, iiiinlcriiti'ly Ion;?, ciiiiTcous, Hciiii-ri'cmiibciit (in tin; iiImIo-
iiinn. Head small, twiiu! as wicUi an long; intci'ooiilar .siirl'aci! slightly con-
vex ; coarsely, (!los<!ly, and variolately ])uiictatu ; nearly three times as wide; as
the eye; longitudinal elevation distinet ; (iciiiar lines meeting .at two lengths
in advance; antennae much longer than the wiiUh of head, rather sli'iider,
dark, |)iceous-black, very slightly jialer toward tip, club large; third joint
oiie-tlilrd as long again as the fourth, fourth and fifth e(iual ; joints of cluh
gradually increasing in si/e, eleventh nearly as hnig as the ninth and tenth
together, acMiminate at tij) ; maxillary palpi dark blackisli-fuscous, lirst joint
very slightly jialer. Prothorax robust, widest slightly before the middle,
where it is seven-eighths as wide as tin? head, and but vei'y slightly iiiirro\V(!r
than long; sides thence moderately convergent jiosteriorly and very feebly
sinuate ; anterior and posterior margins about ecjual in length, tniually
arcuate; surface; evenly (convex, very closely and rath(;r coarsely jmnctate;
puncdures variolate, irregular in outline, three to four times as wide as the
interspaces. Elytra at base notably wider than the head ; sides slightly
divergent post(;riorly and evenly arcuate ; siiturt; nearly one-third as long
again as the proliotum ; together broailly and feebly emarginate behind;
surfaci; strongly and rather evenly convex, rather coarsely ami (;V(;nly jjunc-
tat(; ; jiunctures rounded and sub-vaiiolat(;, very slightly broader than the
inters])accs, which are jiolisluMl. Abdominal segments decreasing evenly
and rapidly in widtl. ; border narrow ; suil'ace wry convex, shining, rath(;r
coarsely punctulatc; ; transverse carinae 4-cuspid, cusps very fine and short.
Under surface of tin; ab<lomen shining, finely ])unctulate ; j)ubesct;nce increas-
ing rapidly in length and tliickness toward the tip, where it is close, long,
recuniln;nt, anij fusco-cinereous. Legs slender, piceons-black ; first joint of
tlie ])osterior tarsi one-fourth as long again as the second, second (;(iiial to the
third.

Mule. — rnknown.

Fiiiiiilc. — Posterior edgi; of the sixth viMitral segment vi'ry broailly and
feebly arcuate throughout its width.

Length 2.0 uim.

AVliite Fisli Point, Nortli(!rn IMicliijian, 1.

A species vory remlily recognized by tiie short first joint of tlie
posterior tarsi.

, Ml

■•i

■4)

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It

11"). S. alacer n. sji. — Form slender. Pubescence rather short and
sparse, sub-recunibent, line, pale piceo-cini'reous. Head robust, mod(;rate,
much less than twice as wide as long; interocnlar surface nearly twice as
with; as the eye, deeply (;scavated ; longitudinal elevation in the form of a
very narrow, acute ridge, rising abruptly from tlu; bottom; sn[ira-antennal
tuberculations elongat", se])arated from the eye by shallow sulcations ;
puiudures longitmlinally coalesc(!nt, very uni;venly distrihute(l ; interspaces
polished ami Hat; ocular lint;s meeting at slightly more than one length in
advance;; antennae; much longer than the; width of he-ad, sli'iider, jjice-ous-
brown throughout, club slender ; third joint slightly me)r(; than onei-third
longer than the fourth, fourth and fifth sub-equal, sixth much longer and

m

'i 111

m

Wf

136

NORTH AMERICAN

V

4

slightly more slciidtir than tlio sovontli ; eifjhth one-half longer than wiile,
joints of cliih increasing very rapidly in length, of nearly eqnal width ;
maxiilai'v paljii very long and sleiidi'r, jiale llavati; throiighont, second and
third joints eiinal in lengtli. Prothorax sub-cylindrical, arouately, evenly,
and very gradually increasing in width. to a point slightly hehind the middle,
where it is nearly one-sixth narrower than long; sides thence very feebly
converg(;nt and strongly sinuate ; anterior margin slightly shorter than the
posterior, nearly e(jnally arcuate ; surfac(^ nearly ev(!nly ellii)Soidal ; punc-
tures trunsverstdy coalescent, rather close, interspaces very convex, polished.
Elytra at base as wide as or \ery slightly wider than the heail ; Ki<les nearly
parallel, almost straight near the humeri, distin(;tly arcuate near the aj)ices,
longer than the width at l)ase ; together narrowly and strongly emarginate
■behind; suture distinctly longer than the pronotum ; surface very convex,
fei'bly and narrowly imjiressed along the suture ; coarsely, evenly, and deeply
punctate ; i>unctures round, impressed, and not coalescent ; interspaces as
wide as the punctures, very convex, highly jiolished. Abdonninal segments
decreasing uniformly and very gradually in width, first much narrower than
the contiguous elytra, cylindrical ; surface rather coarsely, closely, iind evenly
punctate near the base: punctures di'eply impressed and becoming so fine
toward the tip as to almost disappear; interspaces very highly polished;
border nearly obsolete except on the first segment, where it becomes rajjidly
narrower toward the segmental ap(>x ; transverse carinae tricusj)id, middle
cusps long, strong, and finely acuminate, prominent, lateral very rudimen-
tary. Legs long and very slender, tlavate, femora clouded with jiiceous
toward the tip, tarsi very long and slendt^r ; first joint of the posterior nearly
two and one-half times as long as the second, twice as long as the llftli, and
as long as the second, third, and fourth together, fourth scarocdy one-half as
long as the third, fifth much more slender than the i)receding.

Mule. — Fifth ventral segment very feebly emarginate in its middle third
at apex, emai'gination not measurable, evenly rounded, contigucuis surface
cylindrically and fi.'ebl^ Imjiressed throughout anteriorly, pubescence very
coarse; sixth triangularly, narrowly, and very deeply incised at ai)ex, in-
cisure fully twice as deej) as wide, angles somewhat rminded.

Fciudlc. — Fifth segment emarginate in its middle eighth at apex, emargina-
tion evenly rounded, and abont eight times as wide as deep ; sixth segment
narrow, rather obtusely rounded at apex.

Length 3. 2-3. 7 mm.

Cediir Keys, Florida, 1 ; Columbus, Texas, 1 ; Arizona, 5 ; Colo-
rado, 2 ; Southern Illinois, 2.

The specimen of this well-marked species from Texas differs from
the one from Florida in no essential feature ; it a[)pears, however, to
be slightly more mature, and the basal joints of tlie antennae are j)ale
piceo-testaceous, the remainder being nearly piceous-black ; it is the
smallest of the entire number, and is a female.

The above description was ta'ken from the Floridan female.

^

COLEOPTERA.

137

110. S. Ilil'81ltlis 11. sp. — Form r.athor robust. Piibt'sconco very long,
close, senii-creft, rather coars", cinereous, conspiouons. Head ratlier small,
slightly more than twice as wide as long ; interociilar surface feebly convex,
scarcely twic(i as wide as the eye ; longitudinal elevation distinctly wider
than the lateral portions, evenly and rather strongly convex ; sulcations very
feeble; punctures round, deeply ini])ressed, evenly distributed ; interspaces
nearly as wide as the punctures, very convex and highly jiolished ; ocular
lines meeting at slightly more than one length in advance ; antennae^ much
longer than the width of head, moderately robust, very coarsely setose,
piceous-black, club abriij)tly piceous-brown, rather well developed ; third
joint one-fourth longer than tin; fourth, fourth and lifth equal, sixth much
shorter than the seveiitli, equal in width, eighth one-half longer than wide,
scaritely enlarged, cuneate, ninth longer than wide, tenth as long as the
ninth, broadei' than long, eleventh as wide as the teutli, acuminate, m/avly
as lo. "S the ninth anil tenth together ; maxillary pal})! short and robust,
piceous-black, first joint pale piceo-testaceous, third but slightly thicker
than the second. Prothorax robust, widest at the middh^, where it is four-
fifths as wide as the head and just pcu'ceptibly narrower than long; sides
theiici! very slightly convergent posteriorly ami feebly sinuat(? ; anterior
margin slightly longer ami more arcuate than the i)((sterior ; surface very
even, very feebly tuberculate muvr tlu^ basal angles ; puncturi^s small, round,
deeply impressed, evenly distributed; interspaces slightly wider than th<>
punctures, convex, highly polished. Elytra at base as wide as the hea<l ;
sides feebly divergcnit posteriorly, very slightly long(U- than the width at
ba»c, railier strongly arcuate ; together veiy broadly, roundly, and feebly
enargin.vte behind ; suture one-eighth longer than the pronotuin ; surface
Very convex, very feebly impressed on the suture toward the base ; coarsely,
very evenly punctate ; juinctures deeply impresseil, round ; interspaces as
wide as the punctures, convex, highly polished. Abdominal segments de-
creasing arcuately and rather rajiidly in width, first as wide as the contiguous
elytra, nearly cylindrical ; surface very highly ])olished, rather sparsely,
finely, deeply, and evenly punctulate ; lateral border nearly obsolete, except
on the first segment ; transverse carinae 4-cuspid, cusps rather short, equal,
equidistant, finely acuminate. Legs rather short ami robust, black above,
piceous beneath ; first four joints of the posterior tarsi uniformly decreasing
in length, last slender and much longer.

Male. — Sixth ventral segment very broad at apex, where it is very broadly
sinuate, sinus occupying nearly the entire segmental width, evenly rounded
and almost too feeble for measurement.

Female. — Sixth segment angularly produced at tip.

Length 2.5-2.7 mm.

Detroit, IMichigan, 2.

The female associated with the above type differs from it in so
many points that it may prove to be a distinct species ; tlie pubes-
cence is sliorter and thicker, tiie elytra very much shorter, tlie punc-
tuaticn slightly more feeble and irregular tiian in the male ; the
antennae, also, are entirely black. The description has been drawn

P

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hi

I"

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i

■Hi

'$.

^Uy

«P"P

. L._.Ji.

138

NORTH AMKKICAN

from tlie male with cxccittion of tlio moasiiremeuts of tlie tarsal joints,
which were taken from the female.

117. S. Vt'stalis n. sp. — Slciidi'i- ,111(1 fiisil'Dnn. I'libcsponoe rather long,
coarse, iii()il(;ralely close, rcemnbciit, and cinereous on tin? abdomen, exces-
Hively sliort, sparse, line, and almost invisible? on tlio remainder of the upper
surface. Head small, twice as wide as long ; interocular surfaoi moderately
depressed, scarcely twice as wid(i as the eye;, coarsely, rather closely, and
Very feebly jinnctate ; eiiiially trilobcd by the very well-marked sub^tions ;
intermediate surface strongly and evenly convex, prominent ; punctures in
tlie middle so feeble as to be almost invisible, surface shining; ocular lines
meeting at one-half a length in advance: antennae scarcely as long as the
width of In^ad, moderately robust, pi(^t?ous-black, (dub <Ustinct; joints three
to live uniforndy and gradually decreasing in length, sixth and seventh
e(|ual, eighth somewhat wider than long, joints ten and eleven mnidi more
robust tlian the ninth ; maxillary palpi long, lirst joint ti'staceous, remainder
piceous-black, third densely S(?tigerous. Prothorax small, widest at the
middle, where it is four-lifths as wide ,is the lie.'id, and distinctly narrower
than long; sides tbtMict? vei'y feebly convergent |)osterioily and rather strongly
sinuate ; anterior and posterior margins equal in length, the former much
tlie more arcuat(? ; surface slightly uneven, Vi'ry confusedly and rather closely
punctate ; canaliculation long, broad, deej)ly impressed, and very i)r(niiiiient,
teniiinaling at e(|ual distances from the margins, three-fourths as long as the
pronotum. Elytra at base distinctly wider [jiaii the head; sides moderately
divergent posteriorly, very slightly longer than the width at base anil strongly
arcuati?; together roundly and rather strongly einarginati! behind; suture
on(>-tourth as long again as the pronotum ; surface convex, feebly impressed
on the suture at base, coarsely, closely, and very irregularly sculptured;
punctures very seldom isolated, generally joined in (?oalesceiit channels.
Abdomen nearly cylindricjil, segments decreasing slowly and uniformly in
width, first much narrower than the contiguous elytra; border very slight ;
surface v<'ry coarsely and closely ]>uiH?tulate ; transvers(? carinae tricuspid,
eiisi)s ratluu- approximate, long and aciculate at tips, very prominent, inter-
vals strongly sinuate. Legs long and slender, black above, dark piceous-
browii beneath : first joint of the jiosterior tarsi one-half as long .again as the
second, much shorter than the fifth, joints two to four uniformly and very
gradually decreasing in length.

Mule, — Unknown.

Fi'mnle. — Sixth ventral segment rather narrow, very evenly rounded be-
hind.

Length 2.4 mm.

Kern County, California, 1.

A very distinct species ; it seems to come naturally in a position
intermediate between the division with bordered abdomen and tlio.se
in which it is not mariiined, the border only being distinct ut the
bases of the first two segments.

UOLEOI'TKKA.

139

I

i

US. S, talloeilHiH ii. sp. — Form very niodoratcly robust. Pulifseonce
very uliort, si'ini-ci'citt, si>ai'sn, soiiu'wlint uoarsc, jmli- fulvous on tlic aliiloiiKMi,
almost invisil)lt> on the n-mainilcr of tin; dorsal smfiK^c. Head iiiodiTato,
twico as wido .as long; int(>rocular surfai'c? feelily doprcssfd, slightly more
than twice as wide as the eye; equally trilobed by the rounded and distinct
sulfations ; intermediate surface feebly and evenly convex ; jjunetures fine,
extremely close and confused ; interspaces almost lustreless ; ocular lines
meetiiijjr at less than one length in a<lvance ; antennae short, as long as the
wiilth of head, robust, ])iceous-black, club distinct ; joints three, four, and
five .'cjual, sixtli slightly longer and less robust than the stn-entb, eighth
Hiightly elongated, sub-globular, joints of club increasing very rapidl} in
length, last two e(|ual in width and mu(di thicki-r than the niiitli, last joint
us long as the eighth and niutli together; maxillary i)alpi moderatt^, pici'ous-
black, first joint slightly paler, piceo-testaceous. Prothorax widest at the
middle, where it is mere than five-sixths as wide as the head, and very dis-
tiuitiy narrower than long ; sides tlience e(]ually conviM'gent anteriorly and
posteriorly, and nearly straight, very feebly arcuate in the former direotion,
slightly sinuate in the latter ; antcu-ior and posterior margins snb-ecjual in
len!'*h, the form(M' slightly the more arcuate; surface very strongly tuber-
cnlate near the basal angles, feebly and transversely impressed behind the
apex, aTid distinctly swollen along the borders of the canaliinilation ; punc-
tures line, excessively close and confused; intersjjaces almost histreless ;
caualiculatiou large, fusiform, rather deeply impressed and conspicuous,
terminating at nearly equal distanc(!S from the base and api^x, thrise-fourths
as long as the pronotum. Elytra at base as wide as the head ; sides nearly
]>arallel, slightly longer than the width at base, nearly straight, very feebly
arcuate near the apices ; together broadly, roundly, and strongly eniarginate
behind; suture one-lifth longer than the pronotnni ; surface nearly evenly
convex, deeply, somewhat coarsely, extremely closely and irregularly luuic-
ture(l and channeled ; interspaces acute and very feebly shining. Abdominal
segments decreasing nearly uniformly and very gradually in width, first
slightly narrower than the contiguous elytrii ; surface very convex, coarsely,
closely, and evenly punctulate ; transverse carinae tricuspid, cusps long,
strong, finely acicular toward the tips, nearly equal in length, conspicuous,
intervals strongly sinuate ; lateral border almost obsolete, except on the first
segment and at the bases of the others. Legs mod(!rate, slender, piceous-
black al)ov(% femora blackisli-fus(^ous beneath ; first joint of the posterior tarsi
one-half longer than the second, as long as the second and third together.

Midf. — Unknown.

Feimi/i'.. — Sixth ventral segment just perceptibly and very broadly angulate
at the apex.

Length 2.6 mm.

Luke Tahoe, Nevada, 1.

•s,

%

m

no. S. ninibOSUS n. sp. (Fauvel MS.). — Form rather slender. Pubes-
cence very sparse, rather short and coarse, sub-recumbent, very pale flavo-
cinereous on the abdomen. Heid moderate, twice as wide as long; inter-
ocular surface strongly depressed, nearly three times as wide as the eye ;

140

NOUTII AMEUICAN

lon;?itU(linal elevation sli<;litly iiarrow<'r tliaii tin' lateral portions, foobly ami
evttnly fonvcx ; Hiilcations romuliMl, distinct ; puiiotnri^s rather fino, round,
Koniewliat shallow and confused ; int('rsi)aei's very strongly and eons])i('iionsly
granulate, t'eelily sliiniiif; ; ocular lines nieetinj; at slij,'litly more than one-
half a leiiffth in advance; ant(*nnae Very short and robust, S(;ari;ely as loni;;
as tho width of h(\ad, ])iceonR-l)la(!k, cluh niodcrattf ; third joint very short,
scarcely one-fifth longer than tlui fourth, joints lour, five, and six dec-reasing
nnifornily and just perceptihiy in leiiojl^ .six and stn-eu ecpial in leiij;tli,
the latter scarcely perccptihly thicker, eighth very slightly elongated, suh-
glohular, as thick as the seventh, joints of cluh very sliort, tenth slightly tho
hroadest ; maxillary jialpi rather long and slender, ]iiceous-hlack, first joint
dark piceo-testace(nis. Prothorax arcualcly, evenly, and very gradually in-
creas'ng in width to a jioint slightly hchind the middle, where it is slightly
more ihan three-fourths as widi- as the head and much narrower than long;
sides tl ence Very feehly convergiMit j)osteriorly, very short and fi'ebly sin\iate ;
anteri'ii and posterior margins equal in length, the former very arcuate, the
latt.r veiy feehly so ; surface tuherculate near the hasal and apical angles,
distinctly swollen along the sides of the (•analicnlation ; sculiture similai' to
that of the head ; canaliculation broad, deeply impressed, nearly equal in
width throughout, terminating at ('(jual distances from tho base and apex,
four-lil'tlis as long as the jironotum, conspicuous. Elytra at base as wide as
the head; sides vt'ry feebly divergent postt^riorly, longer than th(^ width at
bas(^ and strongly arcuate; together broadly, rounilly, and strongly eniargi-
nate behind ; suture one-fourth longer than the pronotum ; surface nearly
evenly convex, very closely, deeply, rather finely, confusedly, aTid coales-
cenfly punctal(i ; interspaces very acute, coarsely granulate, feebly shining.
Abdominal segments decreasing uniformly and rapidly in width, first much
narrower than the contiguous elytra, cylindrical ; border obsolete exi'ept a
very obscure one on the fii-st segment; surface very coarsely granulose,
coarsely, very closely, feel)l\ , and variolately punctulato ; transverse carinae
tricuspid, cusps closely approximate, long, rather fintdy acuminate, promi-
nent. Legs rather long and slender, iiiceo-fuscous, paler and ruious be-
neath ; first joint of the posterior tarsi two-thirds longer than the second, as
long as the second and third togetlnn-, and as long as the fifth, joints two to
four uniforndy decreasing in length.

Main, — Unknown.

Female. — Sixth segment small, very brojidly and just perceptibly augulate
at tip.

Length 2.2-2.5 n.m.

Fort Garland, Colorado, 2.

120. S. pilgeteiisis n. sp. — Form slender. Pubescence rather long,
coarse, abundant, recumlxMit, ajid cinereous on the abdomen, very short,
spar.«e, and inconspicuous on the remainder of the npper surface. Head
moderate, robust, scarcely twice as wide as long ; interocular surface very
moderately depressed, two and one-half times as wide as the eye ; evenly,
rather finely, and somewhat clostdy punctate ; interspaces flat, minutely
reticulated, somewhat shining; longitudinal elevation distinctly narrower

COLKOPTERA.

141

m

tlian \\\t^ Literal iiorfioiis, evenly and ratlier strongly convex ; oenlar lines
nieetini,' atone and one-lialf lengtli.s in advance; antiMinae slightly longer
than the width of liead, i)ieeons-l)laek, very slender, with exce|)tion of the
llrHt two joints and the club, which are tliick ; third and fourth jointH equal,
fifth jnst iiereejitihly shorter, sixth and seventh e(iiUil in length, the latter
nincli thicker, eighth as wide as long, cordate; l;ist two joints nnnh more
robust than the ni.ith ; maxillary jialpi short and robust, first joint llavo-
testaceons, second and tliiid piceous-black, thiid nearly as long as the lirst
two together. Prothorax widest slightly before the middle, where it is three-
fourths as wide as the head, and distinctly narrower than long, sides thence
very moderately convergent posteriorly and slightly sinuate; anterior and
])osterior margins nearly eiinal in lengtli and curvature ; surface rather
coarsely, very clos(dy, evenly, but rather confusedly punctatt; ; canaliculation
very broad, deeply impressed, long and prominent. Elytra at base as wide
as the head ; sides nearly i)arallel, as long as tho width at base, moderatcdy
arcnrte ; together broadly and just perceptibly eniarginate behind; suture
nearly one-liftli as long again as the pronotum ; surface evenly convex,
coarsely, very closely, irregularly, and confusedly punctured and channeled,
isolated jiuucturos being S(ddom seen. Abdomen nearly cylindrical ; seg-
ments uniformly and extreuu-ly gradually narrowing behind, lirst slightly
narrower than the contiguous elytra ; border of first distinct at base, that of
the remainder extremtdy narrow, and to be seen with difficulty; surface
coarscdy and closely punctulato at base, more finely and sj)arsely so toward
ti]) ; transverse carinae tricuspid, cusps rather approximate, long, stout,
aciculate toward tips, prominent ; lateral slightly inclined inward. Legs
rather long and slender, piceous-black ; lirst joint of the posterior tarsi one-
half as long again as the second, slightly longer than the last, second and
third sub-equal, fourth thin and obliijue.

Male. — Posterior edge of the fifth ventral segment just perceptibly sinuate
near tho middle ; si.xth broadly and deeply sinuate at tip, sinus more acutely
rounded at the bottom than along the sides, about four times as wide as
deep ; seventh narrowly truncate at tip.

Female. — Unknown.

Length 2.1 nun.

Thurston County, Washington Territory, 1.

This delicate little species bears a considerable resemblance to
vestalis ; it differs in the structure of" the elytra, in the sculpture,
in the tarsal structure, and in size. Tiie remarks made upon tlie
abdominal border of vestalis will a[)ply with almost equal force here.

121. S. TacllUS n. sp. — Form ratlier slender. Pubescence short and
coarse, rather sparse except in the medial portions of the abdomen, plum-
beous except along the abdomen and on the head, where it is conspicuously
fulvous. Head moderate, twice as wide as long ; interocular surface mode-
rately depressed, more than twice as wide as the eye; longitudinal elevation
much narrower than the lateral portions, feebly and evenly convex ; sulca-
tious very feeble; punctures rounded, ratlier close, evenly distributed, and

• '•J

142

NOUTIl AMKIUCAX

soiiicwliat obscure ; ociilnr lines iiieetiii),' at fully (uio leiij^th in ddvance ;
aiiteniiiie very slightly longt^r than tho width of hea<l, robust, nearly black,
club rather small ; thiril, fourth, and llfth joints exactly e(|ual, sixth very
slightly shorter, just iiercejitibiy longer and dislinetly more sleuiler than the
seventh, ciglith as wide as the seventh, slightly elongated, conical, joints of
club increasing in length, tenth much the most rolnist ; maxillary pal))! long,
tirst joint pale j)icen-testaci'ous, second slender, piceous-black, third strongly
clavate, black. Prothorax widest just befort! the middle, where it is live-
sixtliH as wide as the head, and slightly narrower than long; sides thencH
nioderat(dy convergent posteriorly and rather strongly sinuate ; anterior
margin very slightly huigi-r and more arcuate than the jiostcrior ; surface
distinctly tuberculato at a Hligitt distance from the basal angles, longitudi-
nally impressed on the (lanks at the widest section, transverstdy and dis-
tinctly impressed just bidiind the apex ; very dosidy, finely, obscurely, and
rugulosely punutate ; canaliculation strong, fusiform, rather roundly im-
pressed, bottom punctate, beginning at (Uie-fourth the length from the vertex,
terniin iting at one-eighth the length from the base. Elytra at base as wide
as the head ; sides parallel, longer than the width at base, strongly arcuate
posteriorly, luorc! feebly so near the liuineri ; together broadly, deeply, and
evenly emarginate behind ; suturtf one-fourth longer than the j>ronotum ;
surface feebly impressed on the suture at the base, tinely, deeply, extremely
closely and irregularly channeled ; channids generally strongly arcuate out-
wardly, having a generally longitudinal direction. Abdominal segments
uniformly and r.'ipidly decreasing in wi<Uli, first much narrower than tiie
contiguous elytra, cylindrical ; surface very closely, coarsely, variolately,
and ev'.nily punctulate, feebly shining ; lateral border very feeble except on
the lirst segment, where it is distinct ; tr/insverse carinae tricuspid, cusps
rather approximate, long and acicular, prominent, and exactly equal in
length. Legs rather long and slender, blackish- fuscous ; first joint of the
posterior tarsi two-thirds longer than tlm second, as long as tlie seconil and
third together, and very slightly sliort<'r than the last, joints two to four
nniforndy and gradually decreasing in length.

Male. — Fifth ventral segment just jierceptibly emarginate in its middle
sixth at apex ; sixth sinuate at ajjex, sinus much broader than the ajiices,
more acutely rounded at the bottom, thrcse times as wide as deep; seventh
transversely truncate at tip, angles rounded.

Female. — Unknown.

Length 2.5 mm.

San Mateo, California, 2.

Distiiiguislit'd from vestulis by its more I'obust form, fulvous pubes-
cence and much finer, closer and more dianneled elytral sculpture.

122. S. amicus n. sp. — Form moderately robust. Pubescence sparse,
coarse, short, nearly erect, i)lunibeou8 except a few scattered hairs on the
liead, and clusters toward the nuddle and base of the abdomen, which are
fulvous. Head small, robust, less than twice as wide as long ; interocular
surface nearly three times as wide as the eye, rather feebly depressed ; longi-
tudinal elevation nearly as wide as the lateral portions, feebly and evenly

1 '

COI-EOPTKKA.

143

(•((iivcx ; jMitictnri'S rntlmr lur(,'t', very closely nrowrlcil, evenly disti'lbiittMl ;
inteisp.'iccs coarsely j;r.'iinil().se ; ocul.ir lines iiieetinf? ,'it scarcely cme-lialt' a
length in advanci; ; antennae^ slij^litly longer than the width of head, ratlier
robiiHt, pioHous-blaok, olub ratlior jjroniinent ; third joint sc^nrctdy (ine-lirth
lonjier than the tnnrtli, fourth and tlt'th e(|u.';l, sixth and seventh eiiual in
leii^'th, and suh-eiinal in thickness, eij;hth thicker than the seventh, sliifhtly
elonjjntcd, last two joints niiK'h thicker than the ninth ; maxillary jialid
rather slender, lirst joint fiilvons, second piceoiis-lilack, paler at has •, tliird
short, rather slender, piceons-hlack. Prothorax widest at one-th..ii tlin
length posteriorly, whore it is flve-8ixths as widn as tliii head, and narrower
than lonj; ; sides thence moderately ronverf,'enf posteriorly, lonj;, feebly
sinuate; anterior inari^in inncb loiii;er than the jiosterior, ci|ually arcuate ;
surface feebly tuberculatt; near tho basal anf,'les, impressed on the Hanks at
one-third tho lenj;th from tlm api^x ; having a deep, ronndecl, jirominent
impression noar each anterior angle; linely, very closely, som(!wliat evenly
inmctati! ; inters])aceH narrow, uneven, distinctly granulose ; canaliculation
terminating at a distances from the haso and apex ecjual to one-fourth the
length, roundly impressed, deep, fusiform, and cons])ieuouK, bottom inipunu-
tatc. Elytra at basc^ wider than the head ; sides very feebly divergt-nt jioste-
riorly, slightly longer than the width at base, strongly arcuate, mort^ strcnigly
BO posteriorly ; togeth(U- broailly, roundly, and very strongly emarginate be-
hind: suture one-fourth longer than the jironotum : surface deejdy impressed
on the suture at the base, feebly impressed near the humeri ; rather coarsely,
very closely, most irreg"''ii'ly, and tortuously channeled. Abdominal seg-
ments decreasing unifv / and rather rapidly in width, first slightly nar-
rower than the contiguous elytra; border neaily obsolete except on tlu^ lirst
segment ; surface very coarsidy, closely, variolately, and evenly pnnctulate ;
interspaces') coarstdy granulose ; transverse carinae tricuspid, cusps nearly
e(inal in length, ratlier linely acuminate, long, and prominent. Legs very
slender, dark pi(;eo-fus<^ous ; lirst joint of the posterior tarsi one-half longer
than the second and distinctly shorter than the last, second, third, and
fourth nniforndy and rapidly decreasing in length ; all the joints are coarsely
granulose.

Mule. — Unknown.

Fmimle. — Sixth ventral segment very obtusidy rounded behind.

Length 3.0 mm.

Colorado, 2.

This species mny be distinguislied at once from vociuis by the
under surface of tlie abdomen, which in tiie latter is highly polished,
very sparingly pubescent, minutely and sparsely pnnctulate, while in
the former it is coarsely and closely punctulate, and the interspaces
are minutely, though distinctly, granulose or reticulated. The struc-
ture of the prothorax of amicus is peculiar and very unusual in the
genus, and renders the species very distinct. ■ - '

123. S. exilis n. sp. — Form slender. Pubescence short, stout, extremely
sparse, semi-erect, plumbeus, somewhat fulvous on the head. Head mode-

■i II

r

_ U.U. JL.

in

NOKTII AMKUICAN

rail', Iwicf lift wiittt an \oi\ji ; iiitci-diiilar mirfnci* two iiiid tlir foiirtlis liiiicg

nK widt' Mrt the eye, very iiiodi'i'ivtely <le|ireMKeil ; loiij^itiKliiial eleviitioii very
Mlinlitly iwirrower than tlie lateral iiortioiis, evenly ami rather stronnly con-
vex ; imiictiireM rather larj;e, feeble, evenly ilistrilmteil, closii, eonl'ii.seil, and
nearly olmolete ; interNjiaces gramiloHt>; ocular lines nieetin;,' at one lenj;tli
in advan(H); antennae as long as the width of head, rather roliust, ])iceous>
Mack, club distinct; jointH three, four, live, and seven Hub-eijnal, the last
sli(;htly the thickest, sixth slightly shorter, eighth slightly elongated, as
wide lis the seventh, club coriipact, last two joints distinctly broader than
the ninth ; maxillary (lalpi moderate, dark ])iceoim-br()wn, first .joint iind
base of the second |piceo-testace<)us and rather pale. Prothorax widest Just
before the mi ' He, wlirre it is six-sevi'nths as wide as tlie head, and one-
eighth narrower than long; sides thence very slightly convt-rgont posteriorly
and I'eclily sinuate ; anterior and postericu' margins ctjual in length, the former
distinctly the more arcuiitu ; siiifaie dls'inctly tubercul'ite near tlut biis.il
angles, broailly and rather feebly inii)resHed on the Hanks near the midtlle,
with two rather small distinct im|)ressions near the a])i"al angles, llnely,
clos(dy, ratlier evenly (nmctate ; interspaces roughly granulose ; itanalicnla-
tion beginning at one-tliiril the len;.;tli from the apex and extending t(. within
oiu'-fourth tlie length of tlu! base, narrowly impressed, nearly eiiually wide
throughout, not vei'v strong, though distinct. Elytra at base wider than the
head ; sides parallel, distinctly longer than the width at base, rather strongly
arcuate, more so posteriorly ; together narrowly, strongly, and roundly enjar-
ginate behind ; suturu one-fourth longer tlian the pronotum ; surfaiu! ftu'hly
iniiiressed on the siitlirii at the base; limdy, somewhat feebly, closely, and
rather tn-enly punctate ; punctures impressed, seldom coalescent, no uhaniiela
present ; interspaces rouglily granulose and shining. Abdominal segments
decreasing uniformly and rather rapid!/ in width, first mndi narrower than
the contiguous elytra, cylindrical ; border obsohite except on the first seg-
ment,where it is narrow and obscure; surface very closely, coarsely, and evenly
pnmtiilate; interspaces granulose and feidily shining ; jjuncturiis liner and
more distant toward the tij> ; transverse carinae tricuspid, cusps closely ap-
proximate, sub-equal in length, finely acuminate, rather long and prominent.
Legs rather short and slender, blackish-fuscous , first joint of the jiosterior
tarsi scarcely more tha' ''-ird longer than the second, and distinctly

shorter than the fifth, ' and three nearly equal, fourth much shorter.

Under surface of en coarsely, closely, and evenly puiictulate ;

interspaces rati a, not visibly reticulated.

Male. — Fifth . segment just visibly and evenly emarginato in the

middle, surface vei^ narrowly, tylindrically, obscurely, and feebly impressed
throughout anteriorly ; sixth sinuate at tip, sinus rather more feeble in cur-
v>;ture than the apices, and equal to them in width, evenly rounded, about
.!i'3ven times as wide as deep ; seventh segment very narrow, truncate at tip,
truncation very feebly arcuate. ,

FeiiKile. — Unknown.

Length 2.8 mm. . '

Calitbrnia, 1. - >

Tliis species is distinguished among its near neighbors by its very
narrow slender abdomen, by the more uniform character of the elytral

1

COI.KMITKUA.

I I.'.

s(Mil|)tiiri>, iiikI liy the stnirfnrc of iIic imtfiiimr. 'llw pnilliorux licars
It jjn'iit n's«'iiil)liiiic<i to tlitit ot' iiijiifiis. Iiaviii;:, iis in tlial s|)«'oi<'s, ilir
Hiimll iin|>ri'ssioiis lujir tin- iintcriot' aii<{les.

124. S. C'alif<»l'lii<'IIM n. wp. — V«i\\\ very inndiM-ntt'Iy i-dliUHf. I'iiIm'm-
ctMKMi hImii'I, liiii', riilliiT Himisi'. (iml incdnHiiiciiiiiiH, Huli-i'ci'Uiiilii'iit, \tti\i'
tlnvo-ciiiiTt'oiis. Head ijitliir Hinall, twice .ih wUU iih loii)^ ; iiiti'iociilnr «iir-
faci' iii'iirly tl'if, ^^l;L,'ltly iimrf tliaii twi.c us wide as tin? cyi- ; liiiif,'ilii liiiiil
I'lcvatioii vi'py slijilitly wi'li'i' tliaii tlic lati-ral |iiiitii>iis, cvi-iily ami Icflily
p:>iiv«x ; siilc atiniiH liroailly rdiiiicli-il ; iimu'tuics ilc'f|), very clitscly crowilcd ;
iiiti'ispaci's I'daiscly giiuuildM' ami liislrclcss ; dciilar liiii's iiin'tiii^j at diic
liMi^'tli ill a<lvam'i' ; aiitciiiiai' distinctly ldiit,'i'i' lliaii tin- wi<llli nl' head, Mack,
piccouH toward tlio tii», hIciiiIcv, cliih niddnatt! ; tliiid joint, diic-litlli ldM;,'cr
than tlic I'diirtli, f'linlh and lll'tli equal, sixth and seventh e(|iial in leii;;th,
the latter much tlii(^kei', ei>;lilli suh-uidlnilar, as tliick as the seventh, jdints
of chill iiicrcisiiii' in length, last two ei|iial in widtli and nincii larjicr than
tlie ninth ; ni:i.\illaiy palpi slend(M', deep black, llrst jdint dark lilactkish-
testaicons. Prothorax small, widest slif^litly heliind the middle; sides
thenco very I'eidily convergent anteridily and posteriorly, aiviiiate, liecdinini,'
niiicli more strongly so in the fornn'r case, slightly sinuate in tlie latter;
anterior margin slightly shoiter and nidie arcuate than tin' posterior; sur-
face very t'eelily and transversely impressed JwU lieliind the apex, etherwise
nearly evenly convex ; jninctnres small, polygonally crowdiMJ, ih'cp, rather
evenly distributed ; interspaces coarsely graniilose and sdiiiewhat lustreless ;
canalicnlatioii well marked, two-thirds as long as the proiiotiim, terminating
at a slightly less distance from the base than the apex. Elytra ;A base dis-
tinctly wider than the bead ; sides nearly i>arall(d, much longer than the
width at base, sommvliat arcuate at two-thirds the distance towar<l tin-
Vertices ; together broadly, roundly, and leather strongly emaiginate behind :
suture two-thirds longer than the proiiotuni ; surfai'e <listinctly iuijjressed on
the suture toward the base, ratluir coarsely, very closidy ))unctate ; punctures
crow(b'd, rarely cealescent ; interspaces coarsely granulated. Abdominal
segments decreasing unit'drmly ;ind rapidly in width, lirst distinctly narrower
than th(i contiguous cdytra ; surface very convex, coarsely, deeply, closidy
punctulato ; intevspnct-a eonrsidy granulose ; transverse carinae tricuspid,
middle cusjis (inely acuminate, prominent ; lateral border very narrow ami
aluiost obsoh^te except on the lirst segment. Legs short and slender, piceous-
black ; first joint of tlie posteiior tarsi <in(?-half longer 'ban the second, eijual
in length to the fifth, joints two to four uniformly and rapidly decreasing in
length. Body winged.

Mdle. — Fifth ventral segment just perceptibly em<arginato in the middle at
apex ; sixth narrowing toward Un> tip, where it is dcjeply bilobed ; cusp
.slightly rounded ; seventh segment narrow at the apex, where it is trans-
versely truncate.

Female. — Sixth segment evenly roundtnl behind.

Length 2.1-2.3 mm.

Lake Tahoe, Nevada, 4; California (Calainas, Gilroy, San Buena-
ventura), 5. ... .J

Stenini. ■ ' 10 ,'■'-.

* \

Ti

140

NORTH AMERICAN

A very distinct form ; it is distinguishable at a glance by its very
long elytra.

Subgenus MUTINUS iiom. nov.

The two following species are separated as a subgenus under the
above name, on account of certain peculiarities in the antennae.
These organs in the male are long and slender, and have the ninth
and tenth joints no thicker than the seventh, or but very slightly
more robust ; the terminal joint ' qual in thickness, but is much
shorter than the penultimate. Jn the female these characters are not
striking, the club being of nearly normal formation, except that the
last joint is about equal in length to the tenth. The general form of
the body is slender ai\d sub-cylindrical, and the abdomen is not mar-
gined laterally. The integuments are highly polished. The tarsi are
normal, the last joint being very short, and the first very long.

The only species thus far discovered within our territory may be
distinguished as follows : —

Larfje Sjwcios, 4.4 mm. in length ; punctuation close. -Arizona. ..12r). gilaD.
Smaller species, 3. U-;5.S mm. ; punctuation nuicli more distant. Massachu-
setts to Texas 126. dispar.

w^

^'M:

I'i"). S. (Itl.) gilsie n. sp. — Form moderately slender. Pubescence sparse,
short, line, piceous, inconsincnons. Head robust, much less than twice as
wide as louj^^ ; interocular surfac(^ strongly dej)i'essed, twice as wide as the
ej'e ; longitudinal ehivation very narrow, strongly convex, impunctate, and
highly jn.lished ; punctures moderate in size, rounded, rather evenly dis-
tributed ; and very closely crowded ; ocular lines meeting at one-lialf a length
in advance, strongly curvate anteriorly; aut(uinae one-third longer than the
width of head, slender, basal joint black, remainder dark piceo-testaceous,
club very sbuider ; third joint very long, one-half longer than the fourth,
fourth slightly shorter than the fifth, sixth distinctly shorter and more
slender than the seventh, eighth and ninth equal in length, the latter dis-
tinctly thicker and slightly niore robust than the seventh, tenth joint just
jxMceptibly shorter than the ninth, cylin<lrical, and distinctly tliicker, last
joint three-fourths as long as the tenth, slightly compressed ; maxillary palpi
very long and slender, translucent, very pale tlavate throughout, second and
third joints sub-ecinal in length, fourth nearly as broad as long, very minute,
rounded at tip. Prothorax widest at two-thirds the hingth posteriorly, where
it is distinctly narrower than long; sides thenc'e very feebly convergent liehind
and strongly sinuate ; anterior margin slightly shorter iiud more arcuate than
the posterior ; surface evenly convex, (h'ej)ly, very closely, and evenly punc-
tate; punctures elongated transversely; interspaces very convex, polished.
Elytra at base as wide as tlie head ; sid^s very feebly divergent posteriorly
slightly longer than the width at base, strongly and almost evenly arcuate ;

f':::'

COLEOl'TEUA.

i4;i

together deeply emarginate beliind; suture slightly longer than the proiio-
tum ; surface feebly impressed along the suture, very evenly, rather finely,
very (dosely i)un(:tate ; intcrsjiaccs not oncvhalf as wide as tlie punctures,
slightly convex, polislied. Abdominal segments decreasing uniformly and
very gradually in width, lirst distinctly narrower than the contiguous elytra ;
surface extremely coarsely and closely punctulate at the base, becoming finely
and much more distantly so toward tlie tij) ; lateral border nearly obsolete,
except on the first s<'gnient ; transverst; carinae tricuspid, middle cusps strong
and coarsely acuminate at tip, lateral much wider, more rounded and some-
what shorter. Legs long, llavate, except the tips of the femora, which are
shaded with castaneous, femora robust, tibiae very long and slendtM-, tarsi
slender, cylindrical ; lirst joint of the posterior more than twice as long as
the second, as long as the next three together, second distinctly longer than
the third, fourth very short, fifth e(jual in length to the third.

Mule. — Fifth ventral segment very feebly emarginate in its middle fifth at
apex, emargination rather angulate, about eight times as wide as deep, con-
tiguous surface narrowly and cylindrically imi)ressed for two-thirds its extent
anteriorly; sixtli deeply and narrowly incised at apex, incisure one-half
deeper than wide, vertex nearly acute, sides slightly sinuate, angles rounded ;
sevi-nth segment deeply emarginate at apex, bottom of emargination broadly
transvers(!, teeth strong.

Fi'iiiule. — Fifth segmtmt slightly roughened or spongy in the middle of the
apical (Mlge ; sixth obtusely rounded behind.

Length -t.4 nmi.

Arizona (Morrison), 18.

This species is very closely allied to dispar, but differs decidedly
in tlie nuicli closer and relatively finer scnliitiire, in tlie struetiire of
the male antennae — where tlie outer joints are shorter and thicker
than the seventh — and very markedly in size ; it appears to be abun-
dant.

126. S. (M.) dispar n. sp. — Form very slender. Pubescence veiy sparse,
moderately long and fine, sub-recumbent, very pale piceo-plumbeous. Head
moderat(!, robust, much less than twice as wide as long; interocular surface
twice as wide as the eye, moderately depressed; loiigitu<linal ehivation very
narrow, rather feebly and evenly convex near the base, becoming ex.treme]y
narrow and eariniform anteriorly ; supra-antennal tuberculations round, very
moderate; punctures coarse, evenly distributed, not coalescent ; interspaces
one-half as wide as the punctures ; ocular lines meeting at slightly less than
one length in advance ; ."iitennae very long and slender, much long(;r than
the width of head, basa joint black, remainder piceous-brown, club elon-
gated, very strong ; third joint one-half longer than the fourth, fourtli shorter
than the fifth and just perceptibly longer than the sixth, sixth very slightly
longer than the seventh, eightli slightly more than one-half as long as the
seventh, seventh and eighth just perceptibly enlarged, joints of clul) much
elongated, tenth cylindrical and as long as the eleventh; maxillary palpi
very long and slender, jjale flavate throughout, third joint distinctly longer

III

If]

■41

I

32C:

HHI

ii;

»148

NORTH AMERICAN

tliJUi tlio st'coiul, Prothorax nrcuatcly, evenly, aiiil very grinliiiiUy iiicreas-
iuf; in wiiltli to a jioint sli<fhtly behind the midiUe, wiieve it is nearly one-
filtli narrower tiian lou};, s'des thenee very teidyly ('oiivergtnit ])osteriorly and
stron;,'ly sinuate ; anterior and posterior margins nearly e<jnal ; surface evenly
ellipsoidal : ininetnres rather small, deeply ir^pressed, somewhat coaleacent ;
interspaees eonvex anu highly i)olishe(l, generally as wide as the jjunetures.
Elytra at hast' as wide as the head ; sides nearly straight for three-fouiths
the length posteriorly, then strongly arcii.'te, mneh longer than the width at
base; width at linni(>ri slightly greater than the distanc^e between the apieal
angles : together narrowly and stroi^gly emarginate behind ; suture distinetly
longer than the jironotum ; surface narrowly impressed along the .suture;
punctures largii, round, deeply iir pressed, somewhat variable in size, nearly
ev- distributed ; interspaces nearly as wiihs as the jiunotures, strongly

eonv(!X, highly jiolisbed. Abdominal segments of nearly e(jual width, muidi
narrower than the contiguous elytra; nearly cylindrical ; surface; nearly as
in (dace)-, though rather more distantly punctulate ; transverse carinae tri-
eusi)id, midille cusp narrow, rather strong, acuminate ; lateral nearly as long
but much broader, rounded at the tip ; lateral border almost obsolete except
on the lirst segment, where; it is very narrow. Legs very long and slender,
jiale llavate throughout ; tirst joint of the })osterior tarsi twice as long as the
secMind, as long as the next three together, second as long as the lit'tli.

Mdlf. — Posterior edge of the fifth ventral segment very feebly and triangu-
larly incised in its nnddh; l'o\.rth. incisure five times as wide as <leep, con-
tiguous surface eylindrically imi)ressed throughout anteiioriy, iiulicsceuce
dens<>, coarse, and piceous ; sixth segment very deeply and narrowly incised
at apex, angle of i)icisure slightly rounded, sid<'S ne^arly straiglit, depth one-
half greater than the width ; seventh transversely truncate at tip, without
lateral te.dh.

Feiiuilc. — Fifth segment very feebly emarginate in its middle (burth at
apex, emargination evenly rounded and not measurable ; sixth segment very
narrow, somewhat obtusely rounded behind ; seventh truncate at tip, lateral
teeth strong and porrected.

Length 3.0-3.8 mm.

Ciimbridge, Massacliusetts, 7 ; Soutliern States (locality unknown),
1 ; Texas, 1 ; Wasliington, District of Columbia, 1 ; Topeka, Kansas, 1.

A very interesting species, varying greatly in size. Tlie above
description was taken from the male, witii the exception of that of
the antennae wiiich was drawn from a female. Tiie male antenna is
unlike anything else in the genus with tiie exception of (,ilce, and is
tiliform, nearly two-thirds longer (hnn the width of head, and having
the three outer joints no wider than the seventli, all very elongated,
except the last, which is scarcely more than one-half as long a.s the
tenth. It seems to be widely distributed.

1

COLEOPTERA.

140

Unrecognized Species.

Tin? following species I liave been unable to identity, altliougli
several of tliem may, i)erlia|)s, liave been unwittingly <lesoribeil under
other nunuis in the preceding pages : —

The original descriptions of these species, four in number, are here
I'cproduced in full, together with the apjjended remarks.

127. SteilUS adspector Miiklin: iii;,'('r, crcborrimc punctatus, parce
piibi'sci'iis, i)ali)is tiiscis, Itasi tostaucis ; fronti' levitcr excavata, l)isiilcata,
interstitio sulipaviiiato ; tlioracc hitituiliiU! vix l()nfj;i()i'f, tibsolotissime caiiali-
eiiL'ito, latcrihiis luoiliL't' rotuiulato ; elytri.s tlidrace dimiilio fore longiorilius,
iiiaf(iiialibus, aiitcrius prope suturaiii subtdnibisis ; abtluuiiiie nitido, suliti-
lius punutato ; fVinoribiis ultra medium rufo-pictsis.

Lougit. 2 lin. Latit. parum ultra j liii.

Ex insula Sitklia a D. Frankenhaeuser transmissus ; cum praece-
dente [»*«/•/<//«««] rarissime oc(!urrit.

Steno scrutatori Erichson certe proximus, sed magnitudine paulo
minore elytris([ue adhuc longioribus diversum esse videtur ("JMiik-
lin").

12S. S> Iiarallelopipedlis Motscluilsky ; plumboo-nigor, creberrimc
pnnctatus, palpis articulo jirimo tr.staci'o, jx'dilms piccis, t'cinorilius dihitio-
ribus, picoo-rufis ; t'rontu obsobito bisub'ata, iutorstitio perpariim couvexo ;
thorace latitudino parum huigion^, posttu'ius angustato, sub-inai'(£uali ; olytris
thoracis loiiijioribus, inttjr i)uiictui'aui rugulosis.

Longit. 1^ lin.

LiUit. li lin.

Habitat in insula Sitkha sub cortice arborum rarissime ; D. I'ip-
pingskiild.

In vi(!initate Steni humilis Ericlis. ponendus (" Miiklin").

120. S. cai'illiceps Miiklin : cyliiidriuus, robustus, nigor, nitidus,
palpis fuscis, basi tustaueis, i)arc<! fbrtitcr ixuictatus ; capite i)er totam
longitudincm I'arinato, utiiiuiuc lat<' sulcato ; tlioracn latitudine tertia parte
longiore, basin versus sul)tilit('r canaliculato ; elytris tlioracc sub-breviuril>us,
abdomine inmiarginato, apicom versus vix angustato, parcissime subtiliter
puiictato; tarsis artieulo quiU'to siinpliei.

Longit. l-j lin. batit. fei'e i lin.

Habitat in insula Sitkha rarissime; D. Frankenhaeuser ("Miik-.
lin"). .

130. §. iiiiinai'giiiatlis Miiklin; cylindricus, niger, nitidus, palpis
fuscis, l)asi testaceis, ])ari:e profnnde punetatus ; cajjite in medio eariiiato,
lUrinque latius sed minus jjrot'undo imi)resso; tlioraoe basin versus subti-
liter obsoletiuRque canaliculato ; elytris thoracis longitudine ; abdoiuine im-
margiuato, pareius subtiliuscjue punutato; tarsis artiuulo quarto sim2)lici.

Longit. 1-1| lin. Latit. ^ lin.

ii

150

NORTH AMERICAN

Hivbitat in insulii Ka<ljiik rarissiine ; D. Ilolmborjr,
Iiulividiiis minoribus St. nigritnli Gylli'iili. maj^nitiuUne acqualis,
set! punctiira parciore et fbrtiore omnino diversus (" Miiklin").

1 ..-..f

AREUS n. gen.

In tbe course of remarks maile in tlm first part of the present
memoir, I bave given most of tlie reasons, wliieb appear to me
suilicient for tlie generic se[)aration of tliose Stenini, in wbicb tbe
fourtb tarsal joint is distinctly bilobed. Species in wbicii tbese lobes
are not api)arent, and in wbicli tbe fourtb joints are merely swollen,
or sligbtly emarginate at tip, are excluded.

On tbe ])late tbe maxillae of two representative species in tbe
genera Stenus and Ahmis are figured, and it will be seen tbat tbey
exbibit dirterences wbicdi may be (!onsid(M'ed as, in a measure, vali-
dating tbe separation, ultbougb it is prol)able tluit tbere are forms
intermediate; ; I Jiave not bad time to fully consider tbis ratber in-
teresting inv(!stigation. As befon; remarked, tbere are many more
aberrant forms in Areus tban in Stenus; tliose species in wbicb botb
the males and females possess good sexual cbaracters, abound in tbe
former and are quite rare in tbe latter, and, altbougb generally
tbrougbout tiie group, tbe males are smaller and more slender in
form tban tbe females, tbere are many species of Areus in wbicb tbe
reverse of tbis is tbe case.

In many closely allied species tbe tarsal claws are variously, and
often considerably modified in shape. These aberrant forms are
figured on the plate, but are not employed for purposes of classifica-
tion, owing to tbe difiiculty of viewing them to advantage. Some of
tbe species resemble each other very closely in general appearance,
and will recjuire very careful attention to tbe descriptions in order to
be accurately determined ; doubtless a few of them still nnnain un-
described. The European species <«rsrj//s Ljnugh, plantaris Erichs.,
and cicindeloides SchiUl., are closely allied to several of tbese, but are
quite distinct; the points of distinction will be given under tbe
' corresponding descriptions.

Tbe main subdivisions of the genus are those generally followed,
and are very natural, tbere being no species at present known within
our faunal limits, which can give rise to much doubt as to its proper
position. Tlie secondary characters of importance are few in num-
ber, very distinct, and easily recognizable ; the tertiary characters,
however, are very feeble, and, as tbey are forced to serve for the

COLEOPTERA.

151

great niaj".'ity of tlio species, tlie table can only be relied on as an
approximate jruide to the descriptions.

On comparinji onr species of this genus with those of Europe, we
find a remarkable difference in regard to the proportional numbers of
those witli margined and unmargined abdomens. Of the former the
Eurofjean fauna contains more than four times as many as it does of
the latter, while in the North American representatives, the ratio of
those with margined abdomen to those in which the border is absent
or very rudimentary, is about one to nine. Several species in our
fauna have the nuirgin entirely obsolete on all the segmen'" except
the first, where it is distinctly visible ; these are all ino'.. ... the

division with abdomen unmargined. It is to be reman.. . aiat our
fauna does not contain any forms with spotted elytra.

The species occ'iu'ring north of the jNIexican boundary in North
America may be provisionally classified as follows : —

* Abdomen manjim' .

Legs black ; tarsi somotimes paler.

Tarsi pale testaceous 1. retrilSllS.

Tarsi scarcely paler than the tibiae ; pubescence longer, luoie dense, and
much move conspicuous.
Frotliorax widest behind the middle ; elytra strongly undulated.

2. fratei'11118.
I'rothorax widest slightly before the middle ; sides less angnlate ; elytra

scarcely undulated 3. Ulllbratilis.

Legs pale brownish-testaceous, clouded with dark castaneous at the junction
of the I'eniora and tibiae ; size mucli smaller 4. Cl'OCt;atU8»

** Abdomen not manjined, or extremely narrowly and imperfectly so.

Fourth abdominal segment wider than the first 5. advena.

Abdominal segments decreasing in width posteriorly, sometimes having the
first three or four sub-equal in width.
Head broad, much %vider than the elytra; elytral suture shorter than the
proiiotu)n.

Prothorax widest before the nn'ddle. Virginia 0. eiirops.

Prothorax widest at the middle. Florida 7. IltegaloilS.

Prothorax widest far behind the middle ; much smaller species. Massa-
chusetts 8. lugeiis.

Head moderate or small in size ; elytral suture longer tlian the proiuitum.
Large species, not less than 3.6 nun. in length.
Legs black throughout.

Prothorax widest behind the middle ; sides thence very feebly con-
vergent and nearly straight anteriorly. Vancouver Island.

9. plicipeiiiiis.
Prothorax widest in advance of the middle.

T

!ii.

-i'-f!

ri.

i!

1.V2 NORTH AMKUICAX

Prothorax widest at tlio anterior margin ; ajiii.'al aiif^lcs ])r()iiiiin>iit.

10. agiiafiis.

Protliorax widest slightly lietorts tlio middle, wluM'o tlu^ sides are

evenly and stron^^ly arcuate 11. MayL

Legs not black tlironghout, sometimes nearly uniform in color ; gener-
ally, however, having strongly contrasting hands of paler tint.

Legs unit'orndy ])ioeons- brown thi'ougliont Il2. UlliaUilis.

Logs almost uniformly pale piceo-lestaoeous throughout ; bead nuich

larger, slightly broader tliau tin* elytra 13. flavicoi'llis.

Ijcgs black with ])aler band cu" bands.

Legs black, with exce])tiou of a narrow, strongly marked baud of
reddish-testaceous near the bases of tlio femora.

14. aiiiiiilai-is.
Legs lilack ; bases of the tibiae distinctly and rather abruptly
paler.
Elytral j>uuctuatiou very sparse, coarse, deep, and irregularly

distributed. Arizona tfi. |ierf<>ratllH.

Elytral punctuation liner, sparse, evenly distributed. Florida.

10. iiiteHci'iis.
Legs black, generally clothed densely with plumbeous or cinereous
pubescence ; tarsi alone paler.
Elytral punctuation very coarse, deep, and somewhat spar.se.

Pronottim strongly, obliipudy, and conspicuously swollen near
each basal an-^le ; pubescence long, coarse, anu prominent.
Anterior and posterior margins t)f the protliorax e(iual in hnigth ;
sides somewhat angulate near the middle. Washington Ter-
ritory 17. pollens.

Anterior uiai'giu longer tlian the posterior ; sides ev(udy iMunded

near the middle. Colorado 18. pateilS.

Pronotum very feebly swollen near the basal angles.
Prothorax eiiually wide at the bast> and apex.

Pubescence short, coarse, and rathtsr j)rominent ; sides of

prothorax arcuate 19. recouditus.

I'ubescence short, line, and inconspicuous; sides of pronotum
feebly angulate ; body iiuire depressed and slender.

20. iii-oiiiiiq litis.
Protliorax distinctly wider at the apex than at the base.

21. canadensis.
Elytral punctuation very line, closely crowded, and very evenly
distributed.
Very rcduist species ; head narrower than the elytra ; prothorax
short, robust, sides arcuate.
Put sconce line, short, and very inconspicuous. British Colum-
bia, Colorado 22. pingnis.

Pubesc(uico long, rather conspicuous ; ])unctuatioii much more
sparse ; interspaces more highly polished. Colorado.

213. utenis.

Species more slender ; sides nearly parallel ; head as widt; as the

elytra; tarsi much paler ; sides of prothorax rather angulate.

m

COLEOI'TKRA.

153

Humeral angles of ulytr.a not prominent ; siiventh segment of the
abdomen 9 broadly rounded behind to the immediate vertex,

which is somewhat aiigiilate 24. f I'iljcctlis.

Humeral ..jj^les of elyti'a very prominent ; seventh scf^nicnt 9
abruptly and obtusely truneate beiiind, tinneatioii in tlie
form of a very broad triangle, angle at the immediate vertex

ol)tuse, but not at all rounded 25. |iai>a{;oilis.

Smaller species, not exceeding 3.4 nun. in ItMigth.
Legs not black.

Very slender species.

Elytral punctuation fine, close ; legs very dark brownisb-fiiscous.

2(j. obsolt'tiis.
Elytral punctuation coarse, rather more sparse, legs pale piceous-
brown.
Anterior margin of the prothorax much shorter than the jxiste-

rior 27. ai'tus.

Anterior and posterio'' margins nearly e(iual in length.

Interocular surface nearly twice as wide as the eye ; larger

species. Louis'ana 28. dillltlis.

InteroiMilar surface but one-third wider than tlu; eve ; very

small species. Florida 2!). lucridioiialis.

Species more rolnist.

Legs j)ale llavo-testaceous, variegated with dark castaneous.
Third joint of maxilhuy (lalpi very long, rather sliMider, tl/ivate ;

femora having the distal tips darker 30. calloHUS.

Third joint of maxillary palpi shorter, very slender at base,
strongly and somew hat abiiiptly clavate, jiale i)iceo-testai'eous

above; femora darker in their distal half 31. varilies*

Legs dark fuscous in color tlirougbout.
I'rothorax distinctly longer than v.'ide.

Elytral jjunctuation very coarse 32. ai'CllIlIS.

Elytral punctuation fine and close.

Sides of elytra moderatcdy convergent near the humeri ;
sidles of jirothorax nearly straight behind ; punctuation

finer and closer 33. puiictatus.

Sides of elytra nearly parallel toward the luimeri ; humeral
angles more- jirominent ; elytral j>unctuation coarser and
more distant ; prothorax distinctly sinuate toward the
basal angles, rather prominently angulate just behind

the middle 34. dissent ieiis.

I'rothorax as wide as long 35. Illlbbai'di.

Legs black or extremely nearly so.

Punctures of the pronotum extremely large, deep, and sparse.
Pacific Coast.

Head as wide as the elytra at base 36. lactllllis.

Head vi-ry small, much narrower than the elytra ; elytral i)unc-

tuation slightly liner and more regular 37. leviceps.

Pronotal punctures small, close, and nearly evenly distributed.

Ij

I'

t . 1

I

im\

lo4 NORTH AMEKICAN

F.lytral punctuation vory coarse, uuicli coarser than tliat of the
pronotum.
Sidt's of tli(^ prntliorax distinctly angulate bcliinil tin' iniildlt!.

Vancouver Island :iS. politllllis.

Sides of i)rotliorax rounded. Lake Superior. ..HI*. sillli<»lllH.
Klytral inmctnation niucli finttr, but slightly (roarser than that of
tlu^ l)ron()tuni ; body move robust.
Pubescence clos(! and conspicuous, plumbeous ; punctuation of
the abdomen extremely dense. Wyoming Territory.

40. pei'tiiiax.

Pubescenc(> v(U-y inconsfiicuons ; abdominal punctuation sparse,

much liner. California 41. lllcidllS.

1. A. I'Ctril8IIS n. sp. — Form rather less robust than that of friiteinii.i.
Pubescence somewhat long, fine, evenly distributed, sub-recumbent, close,
and moderately consiiiciums. Head moderate, twice as wid(^ as long; labrum
very ](roiuiiient ; interociilar surface three times as wide as the eyi^, sliglitly
conve.x ; siilcations moderate though very distinct ; intermediates surface twice
as widci as the latttral portions, broadly, rather strongly and evenly convex ;
punctures very minute, round, fecibiy impressed, distant by twice their
widths ; ocular lines meciting at two hnigths in advance ; antennae ratlier
short and robust, as long as the wiiltli of head, basal joint black, renniinder
pale testaceous, club moderate, slightly infuscat(! ; third joint scarcely one-
third iong(!r than the fourth, eighth distinctly shoi-ter an<l slightly more
robust than the seventh, joints of club slightly elongated ; maxillary palpi
shor' and robust, uniformly pale testaceous throughout. Prothorax widest
at the middlt;, where it is distinctly naii wer than long; sides thence rather
strongly convergent j)osteriorly and very fei-bly sinuate ; anterior margin
much longer than the posterior, eejualiy and feebly anuiate ; surface very
feebly swollen near each basal angle, evenly punctate ; pumtfurcs very small,
round, feebly impressed, distant by nearly twice their widths; interspaces
flat and strongly granulose. Elytra at base about as wide as the head ; sides
moderately divergent posteriorly, much longer than the width at base, nearly
straight to within a very short distance of th»> apices, where they are feebly
arcuate ; together broadly, roundly, and very moderately emarginate behind ;
suture nearly one-half longer than the pronotum ; surface depressed, narrowly
and feebly impressed along the suture ; elytra not undulated, smooth ; punc-
tures small, round, evenly distributed, feebly impressed, distant by nearly
twice their widths ; interspaces flat and minutely reticulated. Abdominal
segnuMits decreasing gradually and somewhat arcuately in width, first as
wide as the contiguous elytra ; surface feebly convex, very minutely and
feebly punctulate ; lateral border ])rominent ; transverse carinae not cusped.
Legs short and rather slender, black, tarsi uniformly pale piceo-testaceous ;
first joint of jiostcM'ior nearly as long as the next two together ; third and
fourth joints strongly and narrowly bilobed.

Mule. — Unknown.

Female. — Posterior edge of the fifth ventral segment abruptly more strongly
arcuate in the middle ; sixth produced at apex in the form of a cusp, with
the point slightly rounded ; seventh segment bilobed at tip.

Lengtli 4.1 mm.

\\k

COLEOPTKRA.

155

Vancoiivcr Ishind, British Columbia, 1.

Easily distinguisiied Crorn unihratills by tlic punctiiution, jiiid by
the hick of the very distinct undiilutioiis of the elytral surfaces in tiie
hitter, as well as by its pale tarsi ; it a[)proaches the Kuropean />/«/<-
taris Erichs.

2. A. fraferilllH u. sp. — Form cloiipatfd, modt'rately robust. Pubes-
ceiuj(i long, dciisi', siilp-rci'iiinlit'iit, ovciily ilistrilmtt'd, very coiispicurms,
cinereous. Head nuxU'ratidy small, robust, twice as wide as long; Ial)rum
prominent ; intcrouular snrt'aco near'' tlirce times as wide as tbe eye, feeldy
convex ; sulcations very feeble ; intermediate snrfaee l)roadly and feebly
convex ; punctures round, deep, eyenly distributed, small, distant by less
tlian their own widtbs ; ocular lines meeting at about two lengtlis in advaiUM- ;
antennae! rather sbort and robust, as long as the width of head, basal joint
black, joints two to six pale testaci'ous, remaining livc^ darker, club moderate ;
third joint one-third longer than the fourth, eighth but slightly shorter
and more robust than the seventh, joints of club elongated, densely setose ;
maxillary ])ali)i short, second joint swollen in the middle, third fattened,
dark piceoiis-brown, paler at the base, second joint piceous-brown in the
middle, becoming paler at base and tip, basal joint flavate throughout.
Prothorax widest slightly beliind the middle, wheri^ it is but little narrower
than long ; sides thencf^ V(!ry feid)ly convergent posteriorly and slightly
sinuate; anterior and posterior margins eiiual in length, feebly arcuate, the
latter very feebly sinuate in tlic^ middb; ; surface strongly tuberculate near
each basal angle, each having a distinct oblique impression immediately
before it ; punctures small, very feebly impressed, round, evenly distributed,
distant by their own widths ; interspaces Hat and tincly granulose. Elytra
at base as wid(> as tbe head ; sides very feebly divergent posteriorly, nearly
straight, much longer tban the width at base ; together rather broadly,
roundly, and somewhat strongly innarginate behind ; suture two-lifths longer
than the pronotum ; surface depressed, broadly, and feebly imi)ressed along
the suture, especially toward the base, each elytron longitudinally triundu-
late ; punctures small, round, evenly distributed, feebly impressed, distant
by their own widths ; interspaces flat and strongly granulose. Abdominal
S(>gmeiits (h'creasing uniformly and moderately in width, first as wide as the
contiguous elytra ; border of lirst four segments very strong ; surface de-
pressed, finely and evenly punctulate ; transverse carinae not cusped. Legs
short and stout, black, tarsi dark piceous-brown ; first three joints of the
posterior decreasing almost nniforndy in liMigth, fifth short; joints three and
four strongly bilobed.

]\fale. — Second ventral segment feebly fiatttmed in the middh; fourth ; tbird
and fourth feebly emarginate in the middle fourth at apex, emarginations
evenly rounded, very abruptly terminated laterally, contiguous surfaces
strongly impressed for a short distance anteriorly ; fifth segment scarcely
perceptibly modified ; sixth broadly and dcply sinuate at tip, sinus much
narrower and more acutely rounded than the apices, somewhat more than
twice as wide as deep, surface feebly flattened in the middle; seventh seg-
ment rapidly narrowed toward tip, where it is roundly and rather strongly

m

htji.

ii

p. 1

!!*■'

lit a

NOUTII AMKHICAN

<»tnarj;innto, lati-rnl tcftli small, Idti'ral sctao Htrong, Hurfdce liaving a loiigi-
tudiiial (carina in the uiiddlo toward tlio baHo.

FiiiKilf, — Sixth si'f,'tiii'iit Htniii),'ly id'dchiccd at njicx, jiroloufjations in tho
form of a cusp with the point slij,'htly roiindi'il ; scvi'Mtli very narrow at tip,
wlmr(* it is strongly and trianj,Milarly (Miiarginato, Antennae nut hu distinctly
infiiscate toward tip as in the male.

Len^'th (extended) f , 4.1t mm. ; % , T).;} mm.

AVyotning Tcfritory, 2; ^liiniiictto, Lake Sujn'rior, 1.

Very closely jiUied to iinibratilis, iiiul (liilering tVoin tlmt species in
tin' f'()Il()\viii<j (rliiinicters, tlic (ronipnrisons bcin;!; inad*! from males : —

III fiuitcniKS tlie aiitennat^ are r<'latively sliorter and moie robust
tiiaii in inithrntifis, and ai'c more distinctly darker toward tip.

The maxillary palpi ot tlie I'ormer are niucii Ion<;er and more
slender tlian tli.w(! of the latter, in wliieli the second joint is flat-
tened, narrowed rapidly toward the base, nnifonidy colored tliroii;^li-
out, not perceptibly wider in tin; middle than at the distal extremity,
ami in which the third joint is iiuich shorter and more strongly llat-
tein'd.

In tlie former the abdomen is more miinitely i)unctate above.

In frdteruKS the apex of the seventh segment is distinctly emargi-
natc at tip, while in vmbratills this segment is rounded behind.

In form, size, vestiture, and in almost all other characters than
those mentioned above, the two species can scarcndy be separat(,'d, but
as these dift'erences, es|)ecially that of the sexual modilications in the
seventh segment, are imcpiestionably specific, we can only regard this
as a reiiiiirkable instance of approximation.

15. A. Illllbratilis n. sp. — Form ratlier rol)ast. Pubescence moderately
long, dense, sub-reciimbent, rather coarse, cinereous, consiiiciiouH. Head
moderate, robust, nuicli less than twice as wide as long; inteiocular surface
strongly convex, very feebly bisulcate, except posteriorly, where tlie sulca-
tions entirely disajipear ; liiiely and (evenly ]iunctat(S punctures round,
deeply impressed ; interspaces scari'cly as wide as the jiunctures, granulat(!d,
feebly convex ; ocular lines meeting at twf) lengths in advance; antennae
slightly long(!r than tlie width of liead, soniewliat slender, liasal joint black,
remainder pale retblish-testaceons, club sh-nder ; thiiil joint one-half longer
than the fourth, fourth and iifth equal, sixth to eighth uniformly and gradu-
ally decreasing in length, the latter somewhat narrower- than the seventh,
joints of dull elongated, last two equal in length, tenth somewhat more
robust ; maxillary ])alpi fusco-j)iceoiis, robust, short, basal joint paler, second
and tliird joints strongly liatteni'd, coarsely setose. Prothorax arcuately,
evenly, and very gradually widening to tlu^ middle, where it is slightly nar-
rower than long ; sides thence vnry mod. rately convergent posteriorly and
nearly straight ; anterior and ])osterior margins equal, nearly transverse ;
surface very feebly swollen near the basal angles, finely and evenly punc-

COI.KOl'TKUA.

167

tntn ; j)niicturt»fl rdiiiid, di'i'idy iiniircsscil, iiiti'i'sp.'ii.'M as widn ns or wiilcr tliaii
th« pinicturKH, iiciirly tlat, liiicly },''''i""l'»t<'il, iiimliTnti'ly shiiiiii),'. Elytra at
'.lasc onc-sixtli widiT tliaii tln^ jirotlidrax ; xidcs very fci-lily divcrj^ciif jKiMte-
liorly, oiic-tliird l(m;,'t'r tliaii tli(! width at l)ase, nearly strai^lit; to^fctlicr
narrowly and stmii^rly cniar^inatc lii-iiiiid ; Hiiturc ont'-tliii'd lon^'i'r than tin-
jirondtnni ; siirt'act' narrowly iniprcsscd alonj; tlic sntiirc, cacli I'lytron with
tlirtM' longitndinaliy dispoHi'd nndiilafionH ; jmncturcH rntlmr Kniall, iciiiid,
(ice|>ly iniprcsscd, fvi-niy di;<tril)iitcd, distant hy slij;htly iiioii' than tiicir
own widths, interspaces linely graniiiosi-, shiiiiiif,'. Abdominal se;,Muents
decreasin;; ratlier slowly but uniformly in width, lirst as wide as the elytra;
horder of lirst four sef,'ini'nts very stron;,', then much narrower: surface very
flindy and evenly ]>nnctnlate, shinin;,' ; transverse cariiiae not <'uspeil. Legs
rather short, jiiceous-hiaok, tarsi much pah'r, the latter very rohust ; lirst,
8econd, and thiid joints of the posterior iinil'orndy dcci'easin>,' in len;,'th,
fourth very strongly hilohed, lifth small.

Miih', — Posterior edges of the second, tliiril, and fourth ventral segments
feehly eniarginate in the middle fourth, emargiiiatioiis very feehle and round,
contiguous surfaces (^vlindrically imjiiessed, the fourth most strongly so; lil'tli
segment transverse and entire at apt^X, surface not appreciahly impressed ;
sixth strongly sinuate at apex, sinus more acutely rounded than the a])ices,
about twice as wide as deep; seventh segm<'nt broadly and evenly I'ounded
bidiind, dorsal armor very strongly developed, projecting beyond the veuti'al
portions.

FciiKilr. — Sixth segment very strongly and acutely, abrujitly ami narinwly
produced at ajiex ; sf^venth broadly, strongly, and angularly eniarginate at
tij). Joints of antennal club more robust, increasing in length ; last joint of
palpi longer, first and second paler.

Length 4.3-4.8 nun.

Luke (iuesnel, British Cohinibiu, 10.

Tills species is extremely elosely iiiiied to tins Eiiropeiin A. pJaii-
taris (Krieiis.), but dirters (Voin it in several clianiclers wiiieli should
undoubtedly be con.sidered specific ; among tliese are tlie following,
drawn from the females of the two forms respectively.

In tlie IbrnuT the dub of the antennae is moderately rol)iist, and
not darl<er or scarcely perceptibly so; in the latter tiuj club is ex-
tremely large and prominent, and abru|)tly much darker in color.

In the former the seventii ventral segment is deeply eniarginate
behind ; in the latter it is narrower at tij), wlu-re it is transversely
truncate.

The elytra in the former are relatively longer and narrower, and
have the surface more unevenly undidated. Tlie pubescence of the
former is longer and more coarse than in the latter.

Notwithstanding these differences, the two specimens compared
above have a most striking mutual resemblance.

1

J

m

ii

i :

I-

n

ii

■'il-

i:)H

NOUTII AMKUICAN

4. A, croceatllH u. hji. (Kauvcl MS.). — Form very UKidcriitcly robust.
I'libt'sciMKu- iiliiiiiilant, i-U>M', Hii)>-r<'(;iiinlii-iit, vury coarwe, I'iiu'rt'oiis, ratlier
liiii<;, iiiiicli liner, iiioro n-ciitnlxMit, mid lc:<s ('iiiis]ii<'iii>iis on tlii' uliiliiiiii>n.
Head nuMlcniti', twic'i! nn wide as long; intfrotiilur «urlaci« twiei- as wide ivs
tlm eye, very ttudily convex, very fe«d)ly Msuli'atH ; punoturns rather toarse,
Honii'wliat evenly distrilmtecl, sli(;litly irr.'iinlar in sliape, deeply impressed,
interspaees nearly llal, varying lioni one-tliir<l to twice the widtli of the
punctures, polished; ocular lines meeting at ahont two lengths in advance;
antennae as long as the width of head, r<din!-t, hasal joint fnsco-piceous,
remainder llavo-testaceons, chih strong ; third joint one-halt' longer than the
fourth, fourth and lifth ecjual in length ; sixth and seventh e((ual, eighth
Mlightly shorter, joints fif cluli nearly eijual in length, tenth most robust and
slightly transvi-rsu ; maxillary palpi I'ather long, pule llavate throughout.
Prothorax nearly one-eighth longer than wide ; sides for thret^fiftlis the
length from the ai)ieal angles parallel and feehly convex, then<:e moderatidy
convei'gent posteriorly and very le(d)ly sinuate; anterior margin distinctly
longer tlian tlie posterior, the former feehly arcuate, the latter transverse;
surface very feehly tuherculate near the hasal angles ; punctures rather
small, round, rather sparse, somewhat unevtMily distrihuted, deeply im-
pressed ; interspaces nearly llat, shining. Elytra at base scarcely one-eighth
wider than the pronotum ; sides moderately divergent jiosteriorly, nearly
two-lifths longer than the width at base, almost straight ; together broadly,
roundly, and rather strongly emargiiiate behiml ; suture one-third longer
than the jironotum ; surface very feebly impressed ahuig the suture ; i)Uiic-
turcs rather small, evenly distributed, round, moderately impressed ; inter-
spaces wider than the j)ni ctures, nearly llat, polished. First tlireo abdominal
segments of nearly e(iual width, somewhat narrower than the contiguous
elytra ; border strong, decreasing in width jtosteriorly ; surface very finely,
feehly, evenly, and closely jjunctulate, sliining ; transverse carinao not
cusped. Legs slender, llavate, with the exception of the distal end of tlie
femora and the base of the tibiae, which are dark piceous, tarsi short and
robust ; lirst three joints of the posterior decreasing nearly uniforndy in
length, lifth nearly as long as the first two togetlier ; third and fourth strongly
hilobed.

Mule. — Sixth ventral segment deeply sinuate at apex, sinus occupying
nearly the entire apex, nearly in the form of a triangular incisure with the
angle broadly rounded, about twice as wide as deep ; seventh segment broadly,
roundly, and rather strongly emarginate at tip.

Female. — Sixth segment narrow, angulato at tip.

Length 3.1— iJ) mm.

Nebraska, 1.'3; Detroit, Michigan, 81 ; Marquette, Lake Superior,
2; l^ong Island, 2; District of Columbia, 3.

A very abundant and well-iimrked species, having a wide range of
distribution.

5. A. adveiia n. sp. — Form sub-tylindrical, somewhat robust. Pubes-
cence coarse, abundant, rather long, sub-i'ecumbent, cinereous. Head small,

. f

COLEOl'TKKA.

1.^(1

ro))iist, Hciwf'i'ly twice art wide iiH long ; iiitt'i (ifiilar .surfin'c distinctly convex ;
three tiiiieH lis wi<le JIH the eye ; siileiitioiiH aliiiont entirely olisolete ; inter-
intiliate HurCaei! evenly convex, niucli wider tliaii the lateral pcirtiont* ; jmno-
tiirt'H eeai'Hi', Very dime, xhallnw, evenly distrihiitcd, not eoaleseeiit l>iit poly-
gonally erowdi'd ; ocular lines nietttin;,' at aliout three lenj,'thH in ailvaii<;e ;
eycH small ; antennae slender, about one-third longer than the width of head,
basal joints Mack, remainder rather dark i)iceons-hrown, clnh very jtronii-
nent ; third joii.t one-third longer than the fourth, eiglitli much elongated,
shorter than tiie seventh and vei'y slightly thinner, joiiitn of cUihof nearly
equal length ; maxillary i)ali>i long and slender, hlack, ha^al joint iii(!eou8-
lilack, third joint stiongly llatteni'd. Prothorax aicuatelv, evenly, and very
gva<lually widening to a ipoint sliglitly liehiud the middi'-, where it is slightly
narrower tiian long ; sides thence very feebly convergent posteriorly and dis-
tinctly sinuate; anterior margin very slightly longer tlian tln« posterior, suh-
eijually and feebly arcuate ; surface nearly evenly convex, very feebly swollen
near the basal angles ; punctures moderate in size, evenly distributed, round,
rather deeply ini])resscd, separated by less than one-half their own widths,
interspaces convex, shining. Elytra at base much wider than the heail ;
sides feiddy divergent posteriorly, nincli longer than the width at base,
nearly straight, except toward the apical angles, where they l)ecomt^ strongly
arcuate ; togetbiu' roundly, strongly, and somewhat narrowly emarginate be-
hind ; suture slightly more than oiie-thiiil longer than tlie pronotiim ; surface
of each (dytron longitudinally and feebly triundulale, together impressed on
the suture in the basal half, very coarsely punctured ; punctures round,
deeply impressed, nearly evenly distiihuted, smaller near the huiueri, sepa-
rated by nearly their own widths ; interspaces feeldy convex, shining. First
three abdominal segments decreasing uniformly and extremely gradually in
width, fourth as wide as tlm first, fiftli nuich widi'rand longer, sixth abruptly
much narrower, neai'iy as long as w ide ; pubescence increasing greatly in
density toward the abdominal tip; border obsolete, except on the first seg-
ment, where it is very narrow ; surface nearly cylindrical, polished, rather
finidy and (n'enly punctulate ; transverse carinae tricuspid on the lirst and
Second segments, very obscurely so on the rcimainder. Legs rather slender,
black ; tarsi piceous-black ; fourth joints strongly bilobed.

MdUi. — Posterior edge of the fifth ventral segment abruptly niort; strongly
arcuate in the uiiddle, strongly and very narrowly impress(^d at the innuediate
apex, inijiression totally disappearing at a very short distance anteriorly;
sixth segment very narrowly and deeply sinuate at tip, sinus very acutely
rounded at tlu* bottom, slightly deepei' than wide and extending nearly the
entire length of tlie segment ; seventh broadly, deeply, and roundly emargi-
nate at tip, surface narrowly carinato in the middle near the base.

Fcinali'. — Sixth segment broadly and feebly angulate at the apex. Fourth
dorsal segment but slightly wider than the first, fifth slightly narrower than
the fourth, sixth much shorter; punctuation slightly more sparse.

Length 4.0-4.4 mm. , , ■

Wliite Fish roint and Mjvquette, Lake Superior, 4.
INIay be recognized witlioiit ditHcnlty, by tlie very singular enlarge-
ment (•'■ the fourth and filth ventral segments, especially in the male.

100

NORTH AMERICAN

; 1

*t 1

The surface of the pronofiim appears to he much rougher and more
irregular in the femah*. The eyes are comj)aratively small and in-
conspicuous, very narrow.

<;. A. curops 11. sp. — Form slender, siib-pylinilriral ; sides nearly paralhd
l)(!liiiid the lu^ad ; pubesceiiee sparse, reeuinlnMit, fine, picu'O-eiiiereoiis, in-
conspieuous. Head very large, tiiiieli wider than any other jjortion of tlio
body, fully twiee as wide as long ; interocular surface moderately dei)ressed,
less than twiei^ as wide as the eye ; snleations moderate in depth, rounded
at the hottdiii ; intermediate snrfai(! rather strongly (convex, wider than
the lateral portions ; pniutnres large, ev<'nly distrihuted, deeply impressed,
round ; interspaces much narrower than the punctures, modeiately <onvex,
shining ; ocular lines meeting at slightly more than one liMigth in advance ;
antennae sligl't'y longer than the width of head, slender, pale piceons-hrown
throughout; third, joint two-thirds longer than the fourth, joints of club
elongated, narrow, increasing slowly in length, last tw<: of ccpial width;
maxillary palpi long, slender, pii.'eti-llavate throughout. Prothorax widest
distinctly in ailvanee of the middle, where it is slightly narrower than long;
sides moderately ccuivergent jiosterjorly and feebly sinuate; anterior margin
longer than the posterior, neai'ly iM|ually and very feebly arcuate ; surface
very feebly tiiberculate near the basal angles; narrowly and distinctly
canaliculated nearly throughout its length ; puncture's close, rather str(Uig,
confusedly coalescent at some spots, isolated at others ; interspaces narrow,
convex, and shining. Elytra at base much narrower than tlu; prothorax,
(.Hjual in width to the latter at base ; sides strongly divergent posteriorly,
much longer than the width at bar>e, strongly and evenly arcuate; togethm-
broadly, roundly, and extremely strongly emarginate behin<l ; suture much
slnu'ter t! I'.n the pronotum : surface of each elytron near the suture narrowly
impressiMl, siitural margins not depressed ; punctures deeply impressed,
somewhat even, nearly coalescent, rounded ; intersi)aces much narrower
than the punctures, very strongly convex, polished. First three abdominal
segments eiiiial in width, as wide as the contiguous elytra ; surface ])()lished ;
nearly cylindrical ; closely, evenly, and coarsely punctulate ; transverse
carina(^ not cusped ; lateral margin obsolete except at the bases of the seg-
ments, where it is very narrow and fetdile. Legs slender, jjale piceous-brown
throughout ; first joint of the posterior tarsi as long as the next three together ;
fourth narrowly bilobed.

Male. — Sixth ventral segment sinuate at n\w\, sinus as wide as the apices,
more acutely rounded at the bottom, strong, nearly four times as wide as
deep ; seventh deeply and roundly emarginat(! at tip, lateral teeth acute.

Female. — Sixth segment broadly angulate at the apex.

Length 3.1-3.7 unn.

Deer Park, Maryland, 7 ; Lee County, Virginia, 4 ; Pennington
Ga[), Virginia, 1.

Closely related to megalops, althougli the abdomen i.s more dis-
tinctly margined in that species. The very large conspicuous head
in tiu'se specie? forcibly reminds us of strangulatus in the preceding
genus.

'I

!

COLEOPTKRA.

161

7. j4. inegaloi>8 n. sp. — Form slender, sub-cylindrical ; sides behind
tlie liefid nearly iiiirallel. Pubescence very s))arrte, more ])li'Utiful on the
abdomen, piceo-cinereous, inconspicuous. Head very large, twice as wide as
long ; interocular surface very feebly depressed, not twice as wide as the eye ;
wulcations rather feeble ; intermediate surface slifjhtly wider than tin; Literal
portions, moderately and evenly convex ; punctures coarse, de(!])ly imint'sseil,
rather close and evenly distril)uted ; interspaces very convex, highly polished ;
ocular lines meeting at two lengths in advance, very feel)ly convergent ;
antennae distinctly longer than the; width of head, ti'ansluoent, piceo-tesla-
ceous, nearly black toward the base, slender, club moderate ; joints nine,
ten. and eleven in-'reasing rapidly in width and length, slender; maxillary
pali)i rather long and slender, Havo-testaceous, darker toward the base, very
translucent. Prothorax arcuately, evenly, and rathe' raiiidly increasing in
width to the middle, where it is much narrower than the head and sliglitly
narrower than long ; sides thence moderately convergent posteriorly and
feebly sinuate ; anterior au'i posterior margins e(iual in length and curva-
tui'e, moderately arcuate ; surface fei-bly and narrctwly tuberculate at a short
distance from each basal angle, also longitudinally canaliculatea ; punctures
coarse, irrt'gularly distributed, not crowded, deeply impresse<l ; interspaces
convex, polished ; canaliculation rather fetdily impressed, bottom rounded,
fusiform in shape, nearly as !ong as the pronotum. Elytra at base much
narrower than the pronotum, equal to the width of the latter at base; sides
very strongly divergent posteriorly, longer than the width at base, very
strongly and evenly arcuate ; together broadly, roundly, and strongly (uuar-
ginate behind ; suture distinctly shorter than the pronotum ; surface m>t
appreciably impressed along the suture ; coarsely, rather evenly, and somt;-
what distantly j)unctate ; interspaces wider than the punctures, convex and
polished. Abdominal segments as wide as the contiguous elytra ; scarcely
perceptibly decreasing in width ; border extremely narrow, rather depressed
than reflexed ; surface convex, very highly polished, deeply, somewhat finely
and evenly punctate ; transveise carinae not cusped ; lateral spiracles very
distinct. Legs pale i)iceous-brown, slender ; first joint of the posterior tarsi
as long as the next three together ; fourth joints narrowly bilobed.

Mull'. — Sixtli ventral segment narrow at apex, where it is sinuate, sinus
occupying tlie entire apex, evenly rounded, very feeble ; seventli rouiully
emarginate at tip, toothed laterally.

Femithi. — Sixth segment evenly rounded behind.

Lenstli 3.6-4.0 mm.

1

'[f

kt

Crescent City, Florida, 10.

This species is rennirkable for its very large head and the r'^culiar
structure of the elytra ; it snould, perliaps, be placed in a subgenus
together with eiiro/)s.

The sexual characters are very slight.

8. A. iMgeilS n. sp. — Form slender, sub-c irical. Pubescence short,
sub-erect, sparse, and inconspicuous ; surface of the body highly jiolishi d.
Head large and very robust, scarcely two-thirds wider than long ; interocular
Stemm. 11

■m !

, \

1G2

NORTH AMERICAX

surface very narrow, scarcely one-third wider than the eye, lUu ; aulcatioiis
almost obsolete and very obscure ; punctures rather fine. rl';;litly confused
and irregular ; ocular lines meeting at one length in advance ; eyes extremely
large and prominent, twice as long as wide ; antennae slightly longer than
the width of head, rather 'slender, piceo-testaceous, becoming much darker
and piceous-brown at the tip, club rather prominent; third joint scarcely
one-third longer tlian the fourth, eighth as wide as long, intermediate in
width between the seventh and ninth, joints of club robust; maxillary palpi
long, piceo-testaceous, becoming nearly flavate at the base, third joint rather
robust. Prothorax arcuately, gradually, and evenly increasing in width to
a point nearly three-fourths the length posteriorly, where it is about one-fifth
narrower than long: sides thence feebly convergent and distinctly sinuate ;
anterior and posterior margins equal in length, the former slightly the more
arcuate ; surface strongly and nearly evenly convex, finely, closely punctate ;
punctures round and moderately imjiressed. Elytra at base much narrower
than the head ; sides feebly divergent posteriorly, much longer than the
width at base, rather strongly and evenly arcuate ; together broadly, roundly,
and very deeply emarginate behind ; suture very slighUy sliorter than the
pronotuni ; surface nearly evenly convex ; coarsely, deeply, closely, and
evenly punctate. First four abdominal segments equal in width, very
slightly narrower than the contiguous elytra, cylindrical, strongly con-
stricted at base ; border obsolete ; surface densely and rather coarsely
punctate. Legs rather short and sl'uder, piceous-brown, distal tips of
femora and basal tips of tibiae very slightly darker ; first joint of the poste-
rior tarsi as long as the next two together, second slightly longer than the
third ; fourth joints strongly bilobed.

^fale. — Posterior edge of the fifth ventral segment just visibly, ncarrowly,
and roundly emarginate in the middle, emargination indefinitely terminated
laterally; sixth narrowly and deeply incised at apex, incisure one-half
deeper than wide, having the anterior and exterior angles very feebly
rounded, sides straight; seventh segment narrow at tip, where it is very
feebly and roundly emarginate.

Female. — Unkuown.

Length 2.8 mm.

Cambridge, Massachusetts, 1.

This is a very distinct species, allied by the form of the head and
elytra to europs and megalops ; apparently intermediate between
them and the usual type, but having a much greater affinity with the
former.

9. A. plicipenni» n. sp. (Schwarz MS.). — Form rather slender.
Pubescence excessively sparse, fine, moderately long, and very inconspicuous.
Head moderate in size, robust, about twice as wide as long ; interocnlar sur-
face two and one-half times as wide as the eye, slightly convex ; sulcations
rounded througliout, rather strong ; intermediate surface much wider than
the lateral portions; punctures moderate in size, round, sparse, very irregu-
larly disposed ; medial regions with but one or two punctures ; iuterapacea

COLEOrTKUA.

ir,3

convex and vevy liighly polinlied ; ocnlar lines meeting at about two lengths
in advance; mtennae much longer than the width of head? very slender,
hasal joint hlack, second piceous-black, remainder piccouH-ljrown, club
prominent, very loose; joints three to five very long, unif'orndy and gradu-
ally decreasing in length, joints of club increasing in length and thickness ;
maxillary palpi long, black, piceous-biack at the base, third joint ratlier
robust. Prothorax widest just behind the middlti, where it is distinctly
narrower than long ; sides thence nearly straight and very slightly conver-
gent anteriorly, moderately convergent and feel)ly sinuate posteriorly ; ante-
rior margin much longer than tlie jiosterior, nearly ecjually and feebly
arcuate; surface with an elongated, obliipie, iiupunctate tulierculation near
each basal angle, and a median fusiform impunctate and slightly elevated
area, beginning slightly in advance of the luiddle, and extending nearly to
the base ; punctures rounded, very deeply impressed, somewhat distiint and
irregularly distributed, entire surface extremely highly polished. Elytra
at base very sl\,htly narrower than the head ; sides rather feebly divergent
posteriorly, longer than the width at base, rather strongly arcuate, more
strongly so posteriorly ; together broadly, roundly, and rather feebly einar-
ginate behind ; suture about one-eighth longer than the pronotum ; surface
slightly uneven near the middle of each elytron, feel)ly impressed on the
suture at the base ; punctures round, deep, small, sparse, nearly evenly
distributed; interspaces convex and extremely highly polished. First four
abdominal segments equal in width, cylindrical, slightly narrower than the
contiguous elytra; surface polished, somewhat rugulose, very sparsely and
indefinitely punctulate ; border obsolete ; transverse carinae tricuspid, mid-
dle cusp alone prominent. Legs rather short, slender, black throughout;
first three joints of the posterior tarsi almost uniformly and very rapidly
decreasing in length ; fourth strongly bilobed.

Mala. — Posterior edge of the fifth ventral segment emarginate in its middle
fifth, emargination rounded, very feeble and very unevenly outlined ; sixth
segment very narrowly and deeply sinuate at apex, siuus very acutely
rounded at the bottom, nearly as long as the entire segment, much deeper
than wide ; seventh broadly emarginate at tip.

Female. — Sixth segment very obtusely rouiiued behind, almost truncate.

Length 3.7-4.0 mm.

Vancouver Island, British Columbia, 7.

This very fine distinct species is cons[)icuous for tiie longitudinal
impunctate carinilbrm swelling of tiie pronotum, and the excessively
liigii {K)lish of the head, pi-onotum, and elytra.

10. A« agnatus n. sp. — Form moderately robust, feebly depressed.
Pubescence K,ng, coarse, sub-recumbent, rather sparse, cinereous, and some-
what conspicuous. Entire surface liighly polished. Head rather small,
robust ; labrum large ; interocular surfaci^ much more than twice as wide as
the eye, convex ; sulcations narrow and mcxlerately distinct ; intermediate
surface wider than the lateral portions, strongly and evenly convex ; punc-
tures rather large, evenly distributed, deeply impressed, rounded, distant
generally by less than one-half their widths ; ocular lines meeting at some-

f *.;-

I I

'ii

1G4

NORTH AMERICAN

wliat more than two liMigtlis in advance ; eyes smnll ; antennae slightly
longer than the width of head, sleiidor, basal joint Mack, remainder dark
piceouH-hrown, clnb distinct ; third, fourth, and fifth joints nearly nniforndy
and gradually decniasing in length, eighth slightly less robust than the
seventh, joints of club of nearly e(iual width ; maxillary palpi short, <lark
piceo-testaeeouH. Prothorax widest at the anterior angles, where it is sliglitly
narrower than long and about five-sixths as wide as the head ; 'sides gradu-
ally convergent to the base and strongly bisinuate ; anterior sinus just
behind the apical angles, much shorter than the ])osterior ; anterior and
posterior margins equally and rather strongly arcuate, the former about
(ine-third longer ; anterior angles well marked : surface rather strongly
tuberculate near each basal angle, transversely impressed just beliind the
anterior margin, rather finely and evenly punctate; punctures round, im-
pressed, generally distant l)y slightly less than their own widths ; interspaces
slightly convex. Elytra at base about as wide as the head; sides ft-ebly
divergent posteriorly, nearly one-third long(U' than the width at base, feebly
and almost evenly arcuate throughout ; together very broadly, evenly,
roundly, and somewhat strongly emarginate behind ; apical angles very
acute and well marked ; surface somewhat depressed, very strongly im-
pressed on the suture throughout its length, each elytron also impressed
before the middle and behind the middle exteriorly ; punctures rather
coarse, round, deeply impressed, evenly distributed, generally distant by
their own widths ; interspaces moderately convex ; suture nearly one-third
longer than the pronotum. Abdominal segments decreasing uniformly and
just visibly in width, first vt!ry slightly wider than the contiguous elytra,
strongly constricted at base: border nearly obsolete except on the first seg-
ment, where it is rather strong ;■ surface finely and rather feebly punctate ;
transverst! carinae not cusped, iri'egularly toothed and coarsely setose.
Legs short, slender, piceous-black ; first joint of the posterior tarsi as long
as the next two together ; fourth joints strongly bilobed, lobes slender.

Male. — Unknown.

Female.. — Sixth segment transversely and broadly truncate at tip, trunca-
tion very feebly bisinUate.

Length 4.3 nun.

liritisli Columbia, 1.

A distinct species, distinguished by the very peculiar form of the
protliorax, the prominent anterior angles being observed in no other
species of the group in our fauna. In the strong sjiarse setae grow-
ing from the transverse carinae of the abdomen, and in tlie general
character of the surfaces, it bears a reseml)latice to plicipentiis of
Vancouver Island ; the very long elytra and peculiar pronotum will,
however, at once distinguish it from any other species. . ,

11. A. Sayi n. sp. — Form moderately robust, somewhat depressed.
Pubescence ratlier long, sjiarse, evenly distributed, snb-recuinbent, coarse,
cinereous, absent from tiie middle portions of the abdominal segments.
Surface of the body shining, distinctly and minutely reticulated. Head

COLEOPTERA.

1 CU)

sniiill, twioc as wide as lon^s t'ycs small, gcnat; distinctly visil)l(' liiOiiinl
them ; iiitt'i'oc'iilar surface more tliau thrcM^ timt'S as \vid<! as the eye, fccMy
convex ; siilcations impressed, rounded at tlu^ bottom, distinct ; intermediate
surface bidadly, evenly, and moderately convex, slif;;litly wider than the
lateral ])ortions ; punctures minute, round, imjjressi'd, evenly distril)uted,
si^jarated liy more than twice their widths ; ocular lines nu^etinij; at about
thre(^ lengths in a<lvanco ; antennae rather short and robust, scarcely longer
than the width of iiead, dark piceo-testaceous, basal joint l)lack, club sliglitly
darker; joints three, four, an'' five uniformly and very rapidly decreasing in
length, seventh and eighth ('(jual in length, the latter mor(! robust, joints of
club small, very feebly coinpri'ssed ; maxillary palpi sluirt and robust, rather
l)al(! j)icco-testaceo\is. Prothorax arciiately, evenly, and moderately rapidly
increasing in width to a jioint slightly in advance of the miildle, where it is
distinctly narrower than long and fiv(>-sixths as wide as the head ; sides
thence rather more rapidly convergent posteriorly and straight ; anterior
margin slightly longer tlian the posterior; somewhat strongly arcuate, the
latter nearly straight ; surface above nearly flat, with two feeble tubercula-
tions on each side just above the Hanks ; punctui'es very small, impressed,
very evenly distributed, distant by nearly twice their own widths; inter-
spaces rtiit. Elytra at base just perceptibly narrower than th(i head; sides
moderately divergent posteriorly, distinctly longer than the width at base,
straight to within a very short distance of the apices, where they are feebly
arcuate ; exterior apical angles very acute ; together broadly and somewhat
strongly emarginate behind ; suture nearly one-third longer than tiie pro-
notum ; surface rather depressed, confusedly, and irregularly undulated
throughout, impressed on the suture, more broadly so toward the basi- ;
punctures small, deeply impressed, round, nearly evenly distributed, st^pa-
rafed by twice their widths ; inters])aces nearly flat. Abdominal segments
decreasing uniformly and rather gradually in width, first as wide as the
contiguous elytra, feebly constricted at base; surface slightly depressed;
border obsolete except on the first segment, where it is very distinct; pun(v
tures small, evenly distributed, as large as those of the pronotum and eiiually
distant ; transverse carinae not cusped. Legs short and slender, black, tarsi
distinctly paler ; first joint of the ])osterior nearly eciual in length to the next
two together; third and fourth joints strongly and nearly e(|ually bilobed.

Male. — Posterior edges of segments two to five emarginate in the midille
fifth, emarginations rounded, those of second and fifth segments v(>ry feeble,
not measurable, not terininat(!d laterally by pronounced angulations, those
of the third and fourth stronger and terminated lateriilly by ))rononnced,
though rounded callosities, contiguous surfaces feebly and cylindrically im-
pressed ; sixth segment broadly and ileeply sinuate at apex, sinus occupying
the entir(( apex, in the form of a broad triangle in which the anti'rior angle
is rounded, and in which the sides are inwardly curvate, twice as wide as
deep ; seventh broadly and evenly roundi^d at apex.

Fimali. — Sixth segment very narrow, evenly, and strongly rounded be-
hind ; seventh emarginate at tip.

Length 4.2-.'). 3 mm.

1

I

I! I

166

NOUTII AMKKICAX

Ciiliforniii, 10.

A reniiirkiible species, apparently quite local. It may at first sij^fjit
he confounded witli tarsalis by the color of the legs and tarsi, but
may be distinguished by its peculiar punctuation and sexual ciiarac-
ters. It is one of our largest species in this group of Stapliylinidae.
The geiuie of the liead being visible beiiind the eyes, renders it dis-
tinct from any other occurring in our fauna.

%\

■ft .■■

■f !/■

I y\

12. A. amabilis i». sp. — Form somewhat slender, siih-cylinilrical.
Pubescence sparse, evenly distrilmted, cinereous, and inc()nsi)iciious. Entire
surfai;e very highly polished. Head moderate in size, robust, not twice as
wide as long ; iiiterocular surface one-half wider than the eye. Hat ; suloa-
tlons almost obsolete ; intermediate surface very slightly wider than the
lateral jxirtions, very sparsely i)unctate and very feebly convex ; lateral
portions closely and rather coarsely punctate ; ocular lines meeting at about
one length in advance, almost exactly straight ; antennae distinctly longer
than the width of head, slender, pale jjiceo-testaceous throughout, very uni-
form in color, club small ; third joint about one-lifth longer than the fourth,
fourth, fifth, and sixtli decreasing gradually in length, eighth elongated,
slightly mor(; robust than the seventh, joints of club slightly elongated;
niaxillaiy pali)i long and sliMider, jjale piceo-tcstaceous, gradually paler
toward l)ase. Prothorax arcuately, evenly, and moderately r,a])idly increas-
ing in width to the middle, where it is nearly one-sixth narrower than long ;
sides thence rather less rapidly convergent j)osteriorly and just visibly
sinuate ; anterior margin slightly shorter and more arcuate than the poste-
rior, the latter nearly straight ; surface transversely and feebly impressed
just behind the apex, otherwise evenly and rather strongly convex ; })nnc-
tures small, deeply iuipressed, close, generally tending to coalesce trans-
versely. Elytra at base about as wide as the Imad ; sides feebly divergent
posteriorly, slightly longer than the width at base, moderately arcuate poste-
riorly, nearly straight toward the hunuM'i ; together broadly, roundly, and
very strongly emarginate beliind ; suture about one-eighth longer than the
pronotum ; surface rather convex, just visibly and very narrowly impressed
on ihe suture to'vard the l)ase, rather coarsely and closely pijnctate ; punc-
tures deejjly imi)ressed and somewhat unevenly distrit)uted, generally sepa-
rated by their own widths ; interspaces very convex. First four abdominal
segments nearly ecjual in width, and but very slightly narrower tlian the
contiguous elytra, cylindrical, feebly constri(!ted at base; border obsolete;
punctures evenly distributed, clos((, deeply impressed, equal in size to those
of the prcuuitum ; transvers(> carinae obscurely and broadly tricuspid. Legs
slender, pic<'ous-brown thoughout without variation in tint; first joint of the
posterior tarsi much shorter than the next two together ; fifth as long as the
flr»t two tog(?tlier ; fourth joints strongly bilobed, lot)es long and narrow.

Male. — I'nknown.

Fi'inah'. — Sixth ventral segment very broadly and evenly rounded behind.

Length o.(J nan.

I \

COI.EOPTERA.

167

Delaware, 1.

Altlioiigh somewhat resembling arculus Er., tliis species may be
distiimiiisiied bv the slriieture of the antennae and tarsi, as well as
by the punctuation and general structure ol" tiie interocular surface.

13. A. flavicorilis (Er.). — Form rather sl«nder, very feebly dopresaed.
Pnliesceiice ratlic^r sjiarse, iiioihM'ate in Icnt^th, cinereous, fine, more reeiiin-
l)(!iit, and dense on the abdomen. Head laige, robust, scarcely twice as wide
as long; interocular surface very ft-ebly depressed, three-fourths wider than
the eye, rather finely, uniformly, very closely, and deeply punctate; punc-
tures not coalesciMit, round ; surface most deeply impressed near the eyes,
gradually rising to the middle, which is l)roadly and rather feebly convex ;
ocular lines meeting at three or four lengths in advance, very feebly conver-
gent, nearly straight ; antennae long, very slender, flavo-testaceous through-
out, club moderate ; third joint much more than oue-balf longer than the
fourth, eighth much elongated, all translucent ; maxillary palpi very long
and slender, piceo-testaceous throughout. Pfothorax arcuately, evenly, and
ratlier rapidly increasing in width to a point distinctly in advance of the
middle, where it is nearly one-eighth narrower than long and about three-
fourths as wide as the head; sides thence rather strongly eoiivrergent poste-
riorly and nearly straight ; anterior and posterior margins nearly equal in
length, very feel)ly and equally arcuate ; surface nearly evenly convex,
nearly evenly, closely, finely, and deeply punctate, nearly impunctate in
the middle. Elytra at base slightly narrower than the head ; sides very
feebly divergent jtosteriorly, distinctly longer than the width at base, feebly
arcuate, more strongly so ]iost(friorly ; togethiH- broadly, roundly, and some-
what strongly emarginate behind ; suture nearly one-fourth longcu" than the
pronotum ; surface very feebly impressed on the suture toward the base;
punctures round, rather small, deeply impressed, nearly evenly distributed,
often distant by more than twice their widths; interspaces nearly flat,
polished, finely reticulated. First four abdominal segments equal in width,
distinctly narrow(!r than thi? contiguous elytra, cylindrical, criistrii^tcd at the
base; surface finely, closely, and evenly punctulate, nin.;a more finely so
toward the apex ; border obsolete except on the first segment ; transverse
carinae not cusped ; the second segment is perhaps very slightly narrower
than the fourth. Lsgs very robust, pale piciio-testaceous, tips of the poste-
rior femora darker, tips of the tarsal joints slightly darker ; first joint of the
posterior tarsi as long as the next two together ; fourth joints very strongly
bilobed, lobes robust ; coxae piceous-black.

ifale. — Posterior edges of the second, third, and fourth ventral segments
very feebly emarginate in the middle fifth, emarginations extremely feeble,
rounded, and increasing in strength posteriorly, hiding nearly straight on the
second, and very distinctly curvate on the fourth ; fifth segment entire ; sixth
deeply sinuate at apex, sinus narrower and more acutely rounded than the
apices, slightly deeper than wide ; seventh vt ry broadly, roundly, and some-
what strongly emarginate at tip.

Hi

•i'B'

108

NOHTFI AMERICAN

Fimolr. — Head mnoh narrower ; iiittM'ofnlar snrfaco relafivoly lirnadi-r ;
oi'iilar liiK^s iiiori' (•(nivcrgoiit ; sixth scjjnu'ut vury ohtiisuly and broiuily
rounded Ixdiind. ,

Li'nj^Ui 4.(J-4.f? nun.

IMicliiffiUi and Lake Supoiior (various points), 2 1 ; Middle Stutt's,
4; Canada, 2; Cambridjie, Massacdiusetts, 2.

A very common, wld(dy diffused species ; the female is much more
robust than the male.

' i"M:

14. A. annularis (I'"r.). — Form rolmst, sub-cylindrical. Pubescence
ratlier jjlcntilul, somewliat louf;, suli-rccuiiibi'iit on tlie alulouien, nioiv sparso
and erect on tlie reniainiler of the (h)rsal surface, cini'reoiis ; entire liody very
hi<,dily polistied. Head moderate, twice as wide as long ; interocular surface
two-tliirds wider tiian tlie eye, tint ; sulcations rather feeble, rounded, inter-
ni(!diat(! surface nuicb broader than the lateral portions, having at its l)as(( a
large imi)uiictate area; ])unctnres moderate in size, closely and polygonally
crowded ; ocular lines meeting at nearly three lengths in advance; antennae
but slightly longer than the width of head, slender, piceous-brown through-
out, club robust; third joint more than one-half longer than the fourth,
tenth slightly broader than long; maxillary palpi very long and slender,
piceo-testaceous throughout, translucent. Prothorax widest just in advance
of the middle, when^ it is just ]ierceptibly narrower than long ; sides thence
arcuate anteriorly, feebly sinuate posteriorly, slightly more convergent in the
former direction ; anterior margin shorter than tlie posterior, equally and
feebly arcuate ; surface rather tinely, very closely, and somewhat (onfusedly
punctate, evenly convex, having in the middle of the disk live rather small
and irregular impunctate spots. Elytra at base very .slightly wider than the
liead ; sides parallel, equal in length to the width at base, strongly and
evenly arcuate ; togetht^r broadly, roundly, and strongly emarginate behind ;
suture nearly one-fourth longer than the prothorax ; surface of each elytron
very feebly tuberculate near its inner basal angle, ])uuctures round, rather
small, very deeply impressed, nearly evenly distril)uted, generally distant by
slightly more than their own widths, interspaces very convex. Abdominal
segments decreasing scarcely jierceptibly in width, first very slightly nar-
rower than the contiguous elytra, sub-cylindrical ; border obsolete, except
on the first segment, where it is very evident, especially toward tlie bas<i :
suiface tinely, closely, and evenly punctulate; transverst; carinao unicuspi<l.
Legs ratlier short and robust, femora black at the base, thence reddish-
testaceous to the middle, thence black to the tips ; tibiae blackish in die
basal half, piceous in the distal half; tarsi rather pale piceo-testaceous ; iirst
> joint of posterior tarsi as long as next two together ; fourth joints very
strongly bilobed.

Ahde. — Sixth ventral segment strongly sinuate at apex, sinus narrower
and more acutely rounded than the apices, but slightly wider than deep,
evenly and narrowly rounded at the bottom ; teetli of seventh segment dis-
tinct and acute.

Female. — Sixth segment broadly angulate at tip, angle broadly rounded.

Length 5.0-5.5 mm.

COLEOPTKKA.

169

Ciimbi'idjrt', IMiissiiclinsc^tts, () ; Nchniskii, ') ; Detroit, ]\Ii('liif,'aii, 1 ;
Illinois, 1 ; Soiillicrii Stiit(!s, 4; Griinshy, Oiiturio, 12.

Tliis sufH'ic's is ptirimps the largest williiii our territory, iiml one
of tlie iarjiest of tiie ^roiip. It is very eoniinon ami widely liilliised,
altlioujili I iiave not yet seen it from tiie i'at'ilie coast. Tlie liiird
and fonrtli ventral segments in the male are very feebly emarginate
in the middle at the apices.

In many respects (iiiiiiihir!s reseml)l(!s the KiM'opean vtrindrhniles;
it difli'rs fiom it in tlie relative width of tiie interocular surface, and
in iht^ disposition of the red l)and about the. femora, liiis being nnudi
|)aler in tint, broader, and extending furtiier from tiie coxae on tlie
latter. The elytral sculptiu-e is almost exactly similar in tiie two
species.

IT). A. perforatlis n. sp. — Form ratlior slender, sub-cylindrical.
Pulicsccncc siiarsf, seiiii-erect, irregularly distributed, moderate in leii;;tli,
cinereous, inconspicuous; entire surface extreiut'ly highly jioli^lied. Head
rather small, robust, much less than twice as wide as long; interocular
surface nearly Hat, scarcely one-half wider than the eye ; sul<;atioiis rather
strong; intermediate surface about equal in widtii to the lateral j)ortioiis,
evenly and strongly convex, imjiuiictate ; juinctiires sparse and vt-ry irregu-
lar in shape, indelinitely coalescent in tlie sulcations ; ocular lines meeting
at more than one length in advance ; antennae longer than the widtli of head,
nnifoinily jiale i)iceoiis-liii)wn, except the ilub which is dai-kcr, the latter
nuMlerate in size ; third joint very luucli elongated, three-fcuirtlis longer than
the fourth, eighth more robust than the seventh, joints of club <'loiigated ;
maxillary palpi very long, tiavate throughout. Prothorax widest at onivthird
its length from the apex, where it is much narroiver than long; sides nearly
parallel, rather strongly and evenly arcuate from the apical angles to a point
slightly beliind the middh^, thence very fetdily convergent jiosteriorly and
ratlitM' strongly sinuate, arcuate at the basal angles; anterior and posterior
margins equal in length, equally and moderately arcuate, nearly equal in
length to the extreme width of the pronotuin ; surface (ivenly convex, sparsely,
very irregularly and strongly punctate, a fusiform sjjace in the middU! of the
disk impunctate ; interspaces convex. Elytra at base distinctly wider than
the head; sides rather feebly divergent posteriorly, about equal in length to
the widtli at base, strongly and evenly arcuate; together broadly, roundly,
and rather strongly emarginate behiinl ; suture very slightly longer than the
pronotum ; surface very coarsely, deeply, sparsely, and irregularly punctate,
a large irregular space near the middle of each elytron impunctate ; punc-
tures rounded ; interspaces convex. Abdominal segments decreasing scarcely
perceptibly in width, first much narrower than the contiguous elytra, nijarly
cylindrical, each segment strongly constricted at its base; border obsolete ;
surface very sparsely, finely, and irregularly punctulate ; transverse carinae
very rudimentarily tricuspid. Legs slender, rather long, piceo-fuscous, tarsi

I

170

NORTH AMKIIICAN

■ft

':h I':

I:

and bast'H of the tiblno paler ; first joint of tin- posterior tftrsi aa long as the
next tlu'i'c toRotlit-r ; foiirtli joints narrowly l)il()lM'(l, lolws long.

A/ale, — Unknown.

Frimilf. — .Sixth vt-ntral sfgrnunt very, narrow, obtusely roundtMl bchinfl.

L(*n<'tli 4.1 miu.

Arizona (Morrison), 2.

Tlic entire sinface of tlie body is of an inten.se hlauk, and is very
highly polisluHl. Tiie very s|)ars<', coarse, deep pinurtiiation, taki'ii
ill eonjiinetion with tlie cyliii<Iriral form of tiie protliora.x, and the
peculiar structure of the head, will render tliis species easily recogni-
zable.

10. A. Ilitescens n. sp, — Form rather slemler, sub-cylindrical. Pubes-
cence extremely sparse, seiiii-ereot, cinereous, inconspicuous. Hody extremely
hi>,'bly polished. Head moderate or small, nearly twiee as wide as long;
interoenlar surface tlat, very feel)ly and irri-gnlarly convex in tiie middle,
where it is almost impunctate ; sulcaticms ol)solete ; punctures moderate in
.size, round, deeidy impressed, very clos»» toward tlie eyes; ocular )ines meet-
ing at slightly more tlian two lengths in advance ; su])i'a-anteunal tul)ercu-
lations ])rominent, elongated, impunctate ; surface between them confusedly
rugulose ; antennae short, scarcely as long as the widtli of head, somewhat
slender, very dark jiiceous, basal joint somewhat paler, club UKnlerate ; third
joint one-h;ilf longer than the fourth, eighth more rolmst than tlie seventli,
joints of club slightly elongati'd ; maxillary i>alpi rather robust, dark piceo-
testaceoHS throughout. Prothorax arcuately, evenly, and rapidly increasing
in width to the middle, where it is distinctly narrower tlian long ; sides thence
ratlier less strongly convergent jiosteriorly and very feebly sinuate; anterior
margin very slightly longer than the posterior, eiiually and rather feebly
arcuate; surface strongly convex ; punctures rather large, deeply impressed,
round, rather irregularly distributed ; a narrow fusifoiiu space in the middle
imjiunctate. Elytra at base about equal in width to the head; sides very
feebly divergent posteriorly, slightly longer than the width at base, nearly
straight near the humeri, strongly arcuate i)nsteriovly ; together broadly,
somewhat angularly and strongly emarginate behind ; suture alwut one-sixth
longer than the pronotum ; surface very strongly convex, feebly and narrowly
impressed on the suture toward the base ; punctures rather large, round,
very deei)ly impressed, evenly distributed, generally distant by more than
their own widths ; interspaces convex. Abdominal segments decreasing
uniformly and rather rapidly in width, first distinctly narrower than the con-
tiguous elytra, cylindrical, feebly constricted at b.'iso ; border obsolete, except
at the base of the first segment, where it is very narrow ; .surface deeply
punctured ; punctures round, nearly as large as those of the pronotum,
evenly distributed, distant by more than their own widths ; transverso
carinae not cusped. Legs slender, piceous-black, basal extremities of the
tibiae piceo-testaceous, tarsi rather slender ; first joint of the posterior
slightly longer than the next two together.

Malt'. — Posterior edge of the fifth ventral segment just perceptibly and
narrowly emarginate in the middle ; sixth narrow, truncate at tip, lateral

COLEOITEKA.

171

anKl«'H rounded, niicCdlo of truncation HomotirneH jn»t perwptilMy ttinuntu ;
turutinnl twtae of sevontli Hoginont vary loiin and Hlrong.

Fimiile. — >Sixt i H»>giu)'ikt roundvd behind at tht> iunukxlinto a\mx, tatvral
portions of tip f(ti>l>ly Hiniiate.

Length 3.G-4.0 luiu.

Floridii, (3.

In tills spci'ie.s th«' sexnnl ohnrnrtPrs b«'('r>m»t v<'ry ('••<d)l<'; it can h»!
distin^nisliiMl from citl/osns Er. by tlli^t elmructt'r, us well uti by the
dark U'gs, iinlciinut', and palpi. .

17. A, pollens n. sp. — Form ratlier robust. Pnbescence inoder.'ite iu
lengtli, dense, coarse, c-onspicuons, cinereous. Head robust, twice as wide
as loll}; ; labruiu very ]>roiiiiiient ; iiitcrorular siirfaec two and one-lialf times
as wide as tike eye, fet^lilv eoiivex ; suleations somewliat feebly roitmied, ink-
pressed ; interntedinte surface much wider tlian tlie lateral ix)rtir>iis, rather
str()iif,'ly and evenly «>nvex ; i>mictures round, evenly distributed, rather
Hiiiall, distant by tlieir own widtlis ; ocular lines meetini; at nearly three
lengths in advance; antennae rather short and robust, as long as the width
of lii^ad, pale brownisb-testawjous, basal joint nearly black, club just visibly
darker, moderate in siae; third joint two-tliirds longer than the fourth, as
long <ts the next two t()geth<u', eight to eleven grailually increasing in thick-
ness ; maxillary palpi robust, rather long, ilark piceo-testaceous throngliout,
third joint infuscate toward tip, second twice as long and thick as the first.
Prothorax widest in the middle; sides thence etiually and nuxb-rately con-
vergent anteriorly and posteriorly, slightly arcuate in the former, nearly
straight in the latter direction ; anterior and posterior margins etjual in
l(;ngth, the former slightly arcuate, the latter nearly straight ; surface
strongly swollen at a short distance from each basal aiigbf, also very feebly
swollen a little in advance of the niidiUe at eadi side ; punctures ronntled,
small, feebly impressed, somewhat unevenly distributed, generally distant
by a little less than their own widths, slightly conlesceiit towanl the base ;
interspaces Hat, polished, grfiyish-black. Elytra at base as wide as the head ;
sides feebly divergent posteriorly, longer than the width at base, straight to
within a very short distance of the apices, where they are feebly arcuate ;
together rather broadly, roundly, somewhat feebly emarginate behind ; in-
ternal edges of the elytra slightly divergent at the apices; suture nearly
one-half longer than the pronotum ; surface depressed, rather broadly and
strongly impressed along the suture, more widely so at the l>ase ; also longi-
tudinally and feebly impressed near each humeral angle ; punctures mode-
rately coarse, deeply impressed, evenly distributed, distant by two-thirds
their own widths; interspaces feebly convex, shining, grayish-black, minutely
reticulated. Abdomen very jiromineiit, segments diminishing just visibly
and evenly in width to the fifth, sixth narrower, all nearly cylindrical,
bor(b>r ol)Solete (;xcept on the first : surface polish(>d, minutely, sparsely, and
evenly punctulate ; transverse caiinae not cusped, ciliate; cilia alwent from
a small space in the middle of each. Legs rather short and slender, black,
tarsi piceons-black ; first joint of the jiosterior much shorter than the last,
scarcely as long as the next two together ; third joints less strongly bilubed
than the fourth. , ' ' "

:ii

nr^

172

NORTH AMKIMCAN

Af(ilp.—PmU'Y\nr (•(!}{« of tliH third ventral f<i'(;iii('iit just vinilily i-iuar^'tniiti^
In the niiddlc sixth, i-ii);ir;;iiiiition <tv«nly nmiidi'd, not tnt'dHiirulilc, contifjii-
onn ccljic <listini-tly ;ind niirrowly lii'Vtdcd ; foiirtli scfiiiii'iU fnwir^'inati- in thH
middle sixth (it iipt'x, eniarj^ination roumh'd, ti-ii t<> twelve times as wiilo m
dt't'p, terminated laterally liy I'cinnded |)n)minen(.'es, eonti^jnons surfaetf im-
pressed for a short distaii<:e anteriorly; lifth scarcely perc'eptihly modilied ;
Bixth deeply and hroadly incised at apex, incisure occnpyin}; nearly the
entire tip, anterior anyie narrowly rounded, siih's strai<,'ht. alioiit twice iis
wide as deep; Hcveiitii sej;ment very large and prominent, roundeil hehind,
lateral H])innuH H<ttae Hhort and rohiint.

FiiiKilv. — Sixth se;;inent rather narrow, acutely annulate at apex, sides of
angle nearly slrai;,'ht ; seventh rather narrow, hilolied at tip. Third tarsal
joints almost as strongly liilohetl as the I'ourtli. Posterior femoia not as
irregularly swollen in the niiildle as in the mal« ; smaller in size.

Length 4.1 J-.').^ % una.

Teiiiiio, Wasliiiifiton Territory, 4; Caliroriiiu, 1.

'V\\ii s|)(!cinK*n from Caliloriiiu iijjreea very .! witli tlic male
from Ti'iiiiio, Init lias tli(^ tarsi and palpi pah-r, and th<' (irili scj;in<'iit
l)roa<liy, roundly, and (|iiiff iipprcciahly <'marj;inat(' iHdiiiid ; tin- in-
cisure of llie sixth sciriiK'Ht is siiy;hlly sinaMor hut similarly sliap('(l.

Tlic \i'ry large seventh sefinitMit in tins inah', ami the liicat dis-
jiiirity in tlic sizes of tlie male ami fennile. as well as the very large
Jind prominent abdonnMi, in wiiich tlic tii^ M'irment is as wide as the
eontijiiioiis elytra, are (listiiij^uishiiig features of tiiis species. It must
be considered in some respects as one of the aberrant species of the
genus.

Tli(f tarsal claw is figured on the plate, fig. 1(1.

\\\

\^. A. patens n. sp. — Form as in iiolhmx. Pubescence moderate in
length, dense, semi-erect, coarse, cinereous, conspicuous. Head roliiist,
scarcely twice as wide as long; labrum vfvy prominent and broail ; inter-
ocular surface two and one-half times us wide as the eye, moderately convt^x ;
siilcations narrow and rather feehle ; intermediate surface broadly convex ;
puiKttures rather large, deeply impressed, round, distant by much less than
their own widths in the convex portions, confused in tin' sulcations ; ocular
lines very convergent, met^ting at less than one-half a length in front of the
labrum ; antennae short and robust, scarcely longer than the width of head,
basal joint black, remainder dark brownish-testaceous, club slightly darker;
third joint one-half longer than the fourth, not as long as the next two
together, seventh much longer and slightly more robust than the eiiihth,
tenth more robust than the eleventh ; maxillary palpi short, very robust,
basal joint rather slender, testaceous, second and third dark piceous, second
joint slightly bent, flattened. Prothorax di'^tinctly longer tlianwidt?; base
and apex equal in length, nearly transverse ; sides arcuate, most strongly
so jnst behind the apical angles, nearly straight toward the base; surface
obliquely tuberculate near each basal angle, very feebly swollen on each side

COt.KOI'TEKA.

173

jii!<t ill fiilvaiicf of the iiiiilillf; punrtiin's iiindfratcly iiiiprt'NNcfl, r<)iiii(l*-(l,
very uloMt*, Hoint-whnt coiiriiHfil. Elytra at 1>as*i nli^'htly wi<lfr tliiiii tlio lioail ;
wiflt's vi'i'y ^*li^,'lltly (livcrnfiil |i(islfiiiirly, iiiiirli Inii^f-r tliaii tin- wiiltli at liaMc,
Very ffflily arfiiatti ; tiij,'i'tli»M- linwidly, roiimlly, ami r.'itlicr li'i-lily <-iiiar){iiiatu
Imhiiiil : xiitiirc nearly oiic-lialf Idii^ftr fjian thf iiroiiotiim : Hiirfart) Htrongly
nixl Hiiiiii'U'liat unevenly |iiinrtat<> ; puin'tnit'S roiiiHl, catlifr dt-fply im-
jii'i'SfttMl, Hciiiicwliat cloHc ; iiiti'i'.s|(»rt'n 'arly llat, iiiiiiiiti-ly itHiciilattMl.
First four nliilDiniiial Mf^jnu-ntH decnvwinj; Hcarctdy pcrci-ptibly in witltli,
lirst as widi" ha tlic (.■oiitinuou.s tdytrn, Hiili-cyliiidricnl ; liordcr appan-nt on
tlif llirtt only ; tranHViTMo cariiiai! very (disciiicly fiirt|itMl in the middle, wliere
tliey are more free fi-om jjiilieneenee tliiiii laterally ; Hiirface rather elortoly,
evenly, and very Htroiif^ly piinetiilate ; piinetiireH nearly as larjje an tlioHu of
Iho elytra. Legs short ami rather .^lender, lilaik, tarsi very dark piceou.s-
brown ; first threi' joints of tliti posterior almost nniroruily decreasing in
length ; all the joints very densely pnheiicent beneath.

Miilr. — I'nknown.

l-'iiiiiilr. — Sixth vi'iitral segment hmg, rather narrow, ra]d(lly becoming
narrower posteriorly throughout its length, narrowly rounded at the lip,
Hurface having a broadly rounded, rather feeble canaliuulatiun traversing
imarly its i-ntire length ; Heveiith Hugnient bilobed at tip.

Length .').(' nun.

Alamosa, Colonulo, 1.

This .species greatly resembles pollens, but differs specifically in tlie
strncliire of the palpi and sixth ventral segment, also most decidedly
in the stronger punctuation of the abdomen above and beneath.

f

t

19. A. recoiKlitllS n. sp. — Form robust, slightly depressed. I'ubes-
cenee ratliei' olose, evenly distributed, semi-erei;t, short, cinereous, somewhat
conspicuous. Head rather small, robust, not twice as wide as long; inter-
oeular surface slightly convex, slightly more than twice as wide as the eye ;
sulfations broadly rounded, feeble; intermediate surface evenly and mode-
rately convex, slightly wider than the lateral portions ; ]>unctures small,
round, deeply impressed, evenly distributed and very close, separated gener-
ally by less than one-half their own widths : ocular lines meeting at two
lengths in advance; antennae slightly longer than the width of head, rather
robust ; basal joint black, second joint and funicle pale testaceous, club
castaneoiis, larg(! ; third joint one-half longer thaw the fourth, joints six
seven, and eight decreasing in length, the latter more robust, joints of duo
slightly elongate, last two much larger than the ninth ; maxillary j)alpi
piceo-tesf;u'eous, paler toward the base, infuscate toward the apex. Pro-
thorax arciiately, evenly, and very gradually increasing in width to a point
slightly behind the middle, where it is slightly narrower than long; sides
thence more rapidly convergent posteriorly and distinctly sinuate; posterior
margin slightly longer than the anterior, nearly straight, the latter very
feebly ar<'uat(! ; surface feebly and distantly tuberculate at the base, other-
wise very evenly convex ; punctures very tine, deep, round, close, and evenly
distributed ; interspaces one-third as wide as the punctures, acutely convex,

174

NORTH AMEKICAN

f ;■'

sliininp;, grayish-blapk. Elytra at, haso as widtA as or just pi^rceptJIAy wider
than th<-' iK'ad ; sidos nearly jiarallel, lonpT than the width at base, f<*td)ly
artniate, slightly iiior« strongly so postt'i-iorly ; togi^ther broadly, roundly,
and somewhat feebly eniarginate behind ; suture one-third longer than the
jtrouotnni ; surface very tWd)ly impressed on the sutdre toward th<' base ;
punetures mui-h larger than those of ])ronotiim, deeply im)>ressed, sonle^vhat
polygonal or round<?d, nvarly evenly distributed, usually dintant \»y one,-lialf
their widths ; interspaces moderately convex, finely reticulated, shining,
grayish-bla<k. Abdominal segnx'iits decreasing uniformly and mo(b-rately in
width, first slightly narrower than the contiguous elytra, neaily oylin<lrical,
'whly const rict<'d at base ; border obsolete, except on the first <egnient, where
it is distinct ; surfa<-e very closely, deeply, and evenly punctrlate ; imnctures
as largo as those of the pronotuui. Legs moderate, black, tarsi paler ; joints
two to four strongly biloln-d, spongy beneath.

Mfih. — Sixth ventral segment broadly and strongly sinuate at tip, sinus
occupying the entire apex, in the form of a triangular incisure, with the
angle broadly rounded, about twice as wide as deep ; seventh broadly
rounded at tip, lateral setae strong.

FciHdlc. — Sixth segment acutely rounded at the middle of the apex, lateral
portions of apex feebly sinuato. Abdominal segments much more robust.

Length 3.9- x.6 mm.

Cambridge, MiU'sachusetts, fi9; Lake Superior, 2; Iowa, 1.

This s[)ecies differs from tarsalia Ljiingii in tiie emarginatioii ot
the elytra behind, whicii is very much stronger in the European
species. They also differ in the structure of the tarsal claws, as may
be seen from the plate.

20. A. propinqnilS n. sp. — Form rather slender. Puliescence short,
•^venly distributed, somewhat sparse, cinereous, not conspicuous ; surfaces
polished, deep black: Head rather small, slightly more than twice as wide
as long ; interocular surface feebly convex, thive times as wide as the eye ;
sulcations very feeble, short, almost obsolete; intermediate surface much
wider than the lateral portions, broadly and evenly convex ; punctures
coarse, round, evenly distributed, very deep, distant by slightly more than
one-half their own widths ; ocnilar lines rfieeting at more than two h .igths
in advan«x' ; antennae short and robust, scarcely as long as the width of
head, basal joint black? remainder brownish-testaceous, club not prominent,
scarcely darker; third joint three-fourths longer than the fourth, fourth and
fifth equal in length, seventh longer than t'' eighth, almost equally n>bust,
tenth much the most robust, terminal joint much ■nailer and slightly
shortek than the tenth ; niaxiliary pal'ii very short and robust, very dark
piceous, slightly paler at the basu, third joint sti-ongly flattened. Prothorax
areuately and very gradually increasing in width for two-thirds the length
posteriorly, where it is much nari-ower than long, and three-fourths as wide
as the elj vra at base ; sides thence rattier mon^ rapiilly wmvergent posteriorly
and distinctly sinuate ; anterior margin slightly longer than tlve posterior,
equally and very feebly arcuate ; surface feebly tuberculate near each basal

COLEOPTERA.

175

H

angle ; punctures rather coarse, round, evenly distributed, very deeply
impressed, distant generally by less than one-half 'lieir own widths ; inter-
spa'cs t'et'bly convex. Elytra at base about as wide as the head ; sides very
fe<'bly divergent posteriorly, nnicli longer than the width at base, feebly
arunate, very slightly more strongly so toward the apices ; together broadly,
roundly, and rather feebly «'marginate behind ; suture on«'-third longer than
the pronotuni ; surface feebly impressed along the suture, niuuh more liroadly
and strongly so toward tlie base ; punctures large, round, very deeply
impresseii, nearly evenly distributed, distant by nearly their own widths ;
interspaces feebly convex, scarcely visibly reticulatevi. Abdominal segments
decreasing uniformly and rather gradually in width, first a« wide as the con-
tiguous elytra, cylindrical ; Iwrder rather strong on the first, nearly obsolete
on the remainder; surfact? coarsely, closely, evenly, and very deeply jiunc-
tate ; ))unctures is large as those of the pronotum, but more distant ; trans-
v<-i-se carinae tricuspid, cusps l)econiing very obscure and indefinite licyoiul
the second segment. Legs short and slender, black, tarsi dark ]ii<M'ous-
brown ; fii-st three joints of the posterior decreasing nearly uniformly and
rather gradually in b-ngtli, first shorter than the last ; fourth joints very
strongly bilolted, third h'sti stixmgly so; all densely, and in part spongy-
pulx'scent beneath.

Male, — Unknown.

Female. — Sixth ventral segment rather narrow, sides nearly straight, rather
rajiidly (■onvergent toward apex, the latter strongly angulate, sides about the
angle nearly straight.

Length 4.2 mm.

New. Hampsliire, 1.

Easilj' distinguished from recovdifns — a very common species about
Boston, Massjiciiusetts — by its narrower form, smaller bead, coarser
and more distant elytnil punctuation, and more intensely black integu-
ments,

Tbe tarsal claw is seen from the figure to approach in general out-
line that of reconditus, but lias the tip more acute and farther pro-
longed.

The figures of the claws drawn on the plate are merely intended to
give the outline when viewed in prolongation of the axis of the last
tarsal joint, and arc not drawn 'o any scale, so that the relative sizes
of the figures are not the same as those of the claws froi.j which they
were taken.

21. A. canadensis n. sp. — Form moderately robust. Pubescence rather
short and dense, semi -erect, evenly distributed, cinereous, rather coarse and
conspicuous. Head inwlerate in size, robust, twice as wide as long; labrum
larg<! ; interocular surface feebly convex, more than two and one-half times
as wide as the eye ; sulcations almost obsolete ; intermediate surface broadly
and feebly convex; punctures ra*hei .nail, round, very deep, evenly dis-
tributeil except in the sulcatio) where they we more closely crowded,

ii

]7r.

NORTH AMKKICAN

gciu'rally distiint by It-ss tliaii uiK^-liiilf tlii'ir wiiltlis ; intei-Hpat'cs very I'lU'bly
co'iivcx ; (iciilar lines nu-etiiig at two Iciifjtlis in advance; antennae rather
sli'nilcr, as long as i\u: widtli (if licad, liasai j<iint lda<-k, leniainder dark
liidwiiisli-ti'.staceons, clnb distinctly darker ; thiid joint sligiitly more tlian
one-liair longer tiian the fourth, seventli niucii longer an<l sligJitly less
r(duist than the eighth, joints of eliib roluist : inaxillai'> ]iali>i long, joints
one and two sli'nder, the former tlavate, the latter slightly darker, testaceous,
third joint slen<lei' at base, becoming strongly enlarged toward the tip, dark
eastaneons toward the apex. Prolhorax widest distinct!;' behind the middle,
wiieri- it is slightly narrower than long; sides thence vt-ry feebly convergent
and s(>nie\hat unevenly arcnatt^ anteriorly, more rapidly c<nivergent and
feebly sinn ite posteriorly ; anterior margin longer than the posterior, e<inally
and very f< ebly arcuate; surface nearly evenly convex thi'ougho'it, rather
coarsely, very closcdy, deeply, and somewhat unevenly punctate; punctures
round, gei|erally distant by oiu'-half their widths. Elytra at base about
equal in wi<ltli to ilw head; sides ratluM- feebly divergent posteriorly, dis-
tinctly longer tl'an the width at base, nearly straight to within a vi-ry short
distance of tin* apices, where they are feebly arcuate ; together broadly,
somewhat angularly and feebly emarginate behinil ; surface rather depressed,
broadly and feidily impressed on the suture towai'd the base, coarsely and
somewhat loosely jiunctate ; punctures round, deeply impressed, nearly
evenly distributed, distant by nearly their own widths ; interspaces I'ailier
convex, iiolislied, deep black, scarcely visibly reticulated. Abdominal seg-
ments decreasing uniforndy and very gradually in widtli, first as wide as the
contiguous elytra, nearly cylindrical after the first ; bonb^r nearly obsolete
except on the first segment ; surface (b;eply, closely, rather coarsely, and
evenly punctate ; punctures very deeply impressed, as large as those of the
jironotum ; transverse carinae indetinitely cusped in the middle. Legs short
and sb'nder, black, tarsi pale brownish : first joint of tlie ])osterior not as
long as the next two together, distinctly shorter than the last ; fourth joints
very strongly bilobed, third very deeply emarginate at tip.

Mall'. — Unknown.

Female. — Sixth ventral segment very long, narrowly and obtusely rounded
at tlie immediate apex, sides thence widely divergent and t'etdily sinuate to
the lateral edges of the segment; seventh segment narrowly and deeply
bilobed at tip.

Length 5.0 mm.

(Jrimsl»y, Ontario, 4; Nortliern Illinois, 1.

Tiio tiirsi of tlie specimen from Illinois are mneli more densely and
coarsely hirsute, and the seventh sc<|;inent is more deeply bilobed at
tip llian in those from Ontario,

Tlie above-described species resembles pollens from AVasl vigton
'IVrritory in general iippearance and size, but in scarcely any other
feature; the punctuation is very much coarser and more sparsely dis-
Iribnted on the elytra, and is much more dense, deep, and prominent
on the abdomen.

COLEOPTERA.

177

The tarsal claw fi;j;iire(l on (he plate resembles in general outline
that of ])ro/>i>if/uus, but is much thick(!r and siiorter, especially
toward the tip.

' rouTiiled
imiiitc to
1(1 deeply

22. A. pillgUiH 11. sp. — Konii very rolmnt. Pubescence short, semi-ereot.
evenly {listril>iit(Ml, rather dense and moderately consiiieiious, cinereous.
Head siii.ill, twice as widens long; interocular surface very IVeldy convex,
two and one-hair times as wide as tin; eye; sulcations very feeble; inter-
mediate surface broadly and evenly (^)iivex ; punctures rather large, round,
dee[)ly imju'essed, evenly distributed, very close but not coalesceiit : inter-
sj)aces nearly acute; ocular lines meeting at more than two lengths in
iidvance; antennae ratlier short and robust, as long as the width of iiead,
basal joint black, remainder jiaie testaceous, club very sliglitly darker, not
prominent ; tliird joint onedialf longer tlian tin; fourth, seventh much longer
than th(^ eighth, almost equal in thickness, last two joints much wider and
longer than tin' ninth: maxillary palpi rather long, testaceous, tliird joint
tlatteiied, iiifuscate toward tip. Prothorax arcuutely and very gradually in-
creasing in width to the middle, where it is distinctly narrower than long ;
sides tluuice moderately convergent posteriorly and just perceptibly sinuate :
anterior and posterior laargins nearly e([Ual in length and curvature, teebly
arcuate; surface feebly swollen iw.iir each basal angle, evenly and very
closely punctate ; punctures deej), not coalesceiit, near the base almost poly-
gonally ciowded, rather coarse. Elytra at base slightly wider than the head ;
sides very feebly divergent posteriorly, very feebly arcuate, longer than the
width at base; together broadly, somewhat angularly and rather strongly
emarginate behind; suture more than one-third longer than the pronotum ;
surface feebly impressed along the suture, more broadly so towaril the base,
very closely and eviuily punctate ; punctures round, very deep, rather coarse ;
int(U'S])aces very narrow. Abdominal segments decreasing uniforndy and
rajiidly in width, first slightly narrower than the contiguous elytra, nearly
cylindrical ; border obsolete except on the lirst segment, where it is rather
strong ; surface closely, dee]>ly, and evenly punctate ; interspaces very nar-
row ; transverse cariiiae not cus})('d, unevenly undulated. Legs short and
slender, black, tarsi dark piceous-browu ; Hist joint of the posterior not as
long as the next two together, sliglitly shorter than the last ; third joints
muidi less strongly bilobed than the fourth.

jl/(//c. — Third and fourth ventral segments just perc(>ptlbly nioilified in the
middle fourth at apex, being feebly flattened; fifth segment not modified,
posterior edge very minutely spongy ; sixth broadly incised at apex, incisure
occujiying tin; entire ajiex, antcuior aiigh^ nninded slightly, sides nearly
straight, fully three times as wide as deep ; seventh broadly rounded behind.

FeiiKilc. — Sixth segment acut(dy rounded at tlui immediate apex, sides
thence slightly sinuate anteriorly ; tip of the seventh segment truncate,
liaving a narrow eiuargination in the middle of the truncation.

Length 4.0 mm.

Uritisli Columbia, 1.']; Tiiursloii County, Washington Terriiory, 1 ;
Oregon, 1 ; Lake Tuhoe, Nevada, I ; Culit'ornia, lo ; Colorado, 2.

Stenini.

12

'I 1
i

I

I

if
1 [

! I.

m^i--'-

': ij

178

NORTH A.MKRICAN

The s])Ocimena associated above tlirt'er among themselves to a sli^lit
degree in several particulars. In the Calif'oniian specimens the punc-
tiii'es are not so closely crowded as in the typical male, which is from
Bi'itish Coininbia. Tiie Southern specimens also appear to iiave paler
and much more pubescent tarsi. Tiiere is one male from Colorado,
in which the sexual modification is sligiitly difl'erent, tlu; incisure of
the sixth segment being relatively deeper, and having the sides of the
nolcii distinctly arcuiite ; in this specimen, also, the seventh segment
is more strongly and narrowly rounded behind. 'liiese specimens
resemble each other so closely, that the most careful scrutiny wilii a
hand lens fails to siiow any difference which may not be accidental,
and I have, therefore, concluded to unite tiiem all.

The tarsal claw of this species is sliown on tiie plate, fig. 14.

23. A. lltenis n. sp. — Form robust. Piilx'snmice sliort, rather sparse
and L'oarsc, Sfiiii-ert'ct, evenly (listiiliiited. very daik eiuereoiis in (.olor, not
very conspiunoiis. Head moderate, slij,ditly more tlian twice as wide as long ;
lalinnn very protninent ; intevociilar fiurlace nearly tliree limes as wide as
tlie <'ye, very teel)ly convex; suliations narrow, very feidile; intermediate
surface twice as wide as tlie lateral portions, liroadly and feebly convex ;
punctures ratlK'r stnall, round, deep, nearly evenly distributed, distant by
less than one-half tlunr own widths; octilar lines convergent, meeting at
about one length in advance; antennae as long as the width of head, fiinicle
rather slender, club elongated, not prominent, compact, basal joint black,
remaind((r translucent, dark testaceous, <;lub distinctly darker; third joint
one-third hmger than the fourth, seventh much longer tlian the eighth,
nearly e<iual in thickness, joints of club inci'easing slowly in huigth, tenth
almost exactly cylindrical throughout its lengtii ; maxillary palpi long, third
joint rather slen<ler, nearly as long as the first two together, tiist two joints
and the base of the third translucent, llavo-testaceous, third infuscate toward
ti]). Sides of protliorax for two-thirds the length posteriorly nearly parallel,
ratlier strongly and evenly arcuate, thence rather strongly convergent to the
base and just visilily sinuate; anterior margin slightly longer than the
posterior, both nearly straight; disk of pronotum very slightly narrower
than long, very feelily swollen near each basal angle ; punctures deep, rather
coarsa, very close, round, and nearly eveidy distriliuted, varying slightly in
size, generally distant l)y one-lialf their widths. Elytra at base very slightly
wider tlutn the bead ; sides nearly parallel, slightly long(>r than the wi<lth at
base, feebly and somewhat uncvcuily arcuate thi'oughout ; together broadly,
roundly, and moderately emarginate behind ; suture two-tifths longer tlian
the ■|)ronotum : surface broadly and extremely feebly impressed along the
suture, elsewliere very feebly and indefinitely undulated, nearly even ;
punctures coarser toward the apices, somewhat unevenly distributed, deeply
impressed, generally separated by nearly their own widths ; interspaces very
feebly convex, polished, scarcely visibly reticulated. Abdominal segments
decreasing uniformly and rather rapidly in width, first as wide as the con-

COLEOPTKRA.

171)

tignoiis elytra, sub-cylindrical .iftor the first, \''iii(;li alone is distinctly mar-
gined ; surface very dec'ply, chisely, evenly, and rather eoaisely [lunctate :
punctures about as lai'gc as those of the elytra ; infin-spaces feebly convex,
narrower than the jiunctnres, highly polished. Legs short and slender,
black, tarsi rather dark i)iceous-br()\vn, joiuts very roliust, densely hirsute,
especially beneath ; (list joint scarcely two-tiiirds as long as the last ; fourth
joints very strongly bilobcd, tiiird very deeply eiiiarginate at tip.

Mii/e. — Hixth segment bi'oadly incised, incisure occujjying the entire seg-
mental width at ajicx, sides nearly straight, aiiti-i-jor angh* rather broadly
rounded, exterior angles rounded, widtii nearly foui' tim<'S tlie depth ; scn-eiitli
segment obtusely rounded behind.

Fcmtilc. — Sixth segment angularly and acutely produced at tip, sides of
angle very feebly sinuate.

Length 3.I--4.4 nun.

Fort Garlaiul, Colorado, 7.

This specie's ai>|iroxinial<'s more closely to tiic Eiiropcaii fursiifis
Ljuiigli tlian any otlicr wliicii I iiave been able to examine; it dirt'ers
from tliiit .species as follows : —

Tlie elytral punctuation in tdrxalls is more even in distribution
and in the size, of tlie [junctures, tlie elytra lojiether are shorter iind
more strongly emarginate behind, and the maxillary palpi are shorter
and more robust than in uteuis.

In the former the tarsi are less robust, less strongly pubescent, and
have the first joint relatively longer tiian in the latter.

The sixtli segment in the female o\' tars(dis is more obtuse behind,
and more acutely and abruptly produced as a cusp-like point at the
immediate apex than in the like sex of ntenis.

There are other differences, especially in tlie more robust shape of
the American s|)ecies, wiiicii might be given, but the above will serve
to show tliat the two species iire almost umiuestionably distinct.

The tarsal claw as figured, plate, fig. IT), is seen to be more
abrui)tly bulbous at the base than that of tarsalis. The (jonforin-
ation of this appeiulage does not vary appreciably witlt sex, as far as
I have been able to observe.

24. A. trajecfllS n. sp. — Form robust. Pubescence rather long, fine,
evenly distriluited, sub recumbent, dark cinereous, moderately conspicu>ius.
Head moderate in size ; biljrum liroad, rathor prominent ; interocular surface
two and one-half times as wide as the eyj, flat ; siilcations narrow, conver-
gent, rather feeble ; intermediate surface twice as wide as the lateral portions,
very feebly and broadly convex ; punctures rather irregular in outline, close,
aluKvst evenly distributed ; ocular linos nu'i'ting at two lengths in advance ;
antennae rather longer than the width of head, somewhat slender, cluli
moderate, basal joint piceous-black, remainder pale testaceous, club just
visibly darker ; third joint one-halt longer than the fourth, joint.-, of club

f

180

NORTH AMERICAN

''m

; -^

! 1

I '

increasing rapidly in lenj^tli, clcvciitli almost ns long as tlio ninth niu\ tenth
togetluir ; maxillary palpi rather long and Hlunder, translucent, pale testa-
ceonH throiijrhoiit, reddish towanl the tip, more tlnvate toward the hase, third
joint much shorter than the lirst two totjether. Prothorax widest at the
middle, where it is distinctly narrower than long ; sides thence rather feehly
convergent and slightly arcuate anteriorly, slightly more strongly convergent
posteriorly and nearly straight; anterior margin slightly longer than the
posterior, hoth nearly straight ; surface nearly evenly convex, very closely,
rather coarsely and somewhat irregularly jjunctate ; ])unctures irregularly
polygonal, M'ry closely crowded at some points. Elytra at hase about as
wide as the heail ; sides fe(d)ly divi-rgent jiosteriorly, very slightly longer
than the width at hase, vi)ry feel)ly arcuate, nearly straight towaid the
humeri , together vcT'y hroa<ily, roundly, and rather strongly emarginate
hehind ; suture onc^-fit'th longer than the iironotiim ; surface ljroa<lly and very
feehly imi>ressed oil tilt! suture at the hiise, tdsewla^'e evenly convex ; jiuiic-
tures evenly distributed, nearly round, deep, distant by slightly more than
one-half their widths ; interspaces rather strongly convtix, polished, very
feelily reticulated. Abdominal segments decreasing uniformly and rapitlly
ill width, cylindrical, first just perceptilily narrower than the contiguous
elytra; first very narrowly margined, remainder not margined; surface
deeply, closely, (evenly punctate ; punctures round, smaller than those of
elytra, distant by less than their own widths. Legs short, black, tarsi
pale tiavate ; lirst joint of the posterior elongated, as long as the next two
together, slightly longer than the fifth ; second nearly twice as long as the
third ; fourth joints moderately bilobcd, third moderately emarginate at tip.

Mull!. — Unknown.

Female. — Sixth ventral segment very obtuse btdiind, very broadly angulate
at the middle, angle not rounded, sides nearly straight.

beiiyth ;5.!--4.ri mm.

Vetii Pass, Colorado, 2.

Very readily distinj^uislied from any otlier in this vicinity by the
peculiar .structuiv of tiie tarsi.

Tlic tarsal claws are nearly simple and very slender, as may be

seen in tlie figure.

f '1

25. A. papagOIlis n. sp. — Form robust, somewhat depressed. Pubes-
cence rather short, evenly distributed, somewhat dense, and but moderately
eonspicutnis, cinereous. Head rather large, twice as wide as long ; labruin
moderate; eyes promimmt ; int+n'ocular surface slightly mort^ than twice as
wide as the eye, slightly convex ; sulcations very feeble ; intermediate sur-
face more than twice as wide as the lateral portions, broadly and rather
strongly convex ; jiunctures round, rather small, very deep, evtMily distri-
buted, distant by less than one-half their widths ; ocular lines ratlier con-
vergent, meeting at less than two lengths in advance ; antennae moderately
robust, scarcely longer than the width of head, basal joint black, remainder
pale yellowish-testaceous, ••lub scarcely darker, not vt'vy prominent; third
joint two-thirds longer than the fourth, not as long us the next two together,

COI.EOPTERA.

181

rapidly

seventh niunli longer and Hli)j;litly less nilmst tlion tin- ('i;,'litli, ninth nearly
as large as tin? tenth ; maxillary palpi long and slen<ler, i)ale llavo-testai^'oiis
'hroiighoiit, third joint as long as tlie lirst two together. Prothorax widest
in thtf middle, wher<^ it is mnch narrower than long, and scarcely more tlian
three-fonrths as wide as the Inmd ; siiles tiience slightly more convergent
posveriorly than anteriorly, nearly straight in hoth ; jirominently angiihite
at the wid(^st suction; anterior margin slightly longer than the piisterioi*,
eqnally and extremely feehly arcnate ; snrfaco jtist visihly and minntely
swollen near each hasal angle, elsewhere very evenly convex ; punctures
very deep, round, nearly evenly ilistrihuted, rathi-r small, distant l>y less
than one-half their widths. Elytra at hase ahout ecjual in width to the
head ; sides nearly parallel, distinctly arcuate, very slightly longer than the
width at hast! ; together hroadly, roundly, and rather strongly emarginate
behind ; suture one-fourth longer than the pronotum ; surface somewhat de-
pressed, very feehly impressed along tlu^ suture, very even ; ])unctures rather
coarse, very close, evenly distrilnited, deep, distant hy ahout one-half their
widths ; interspaces nearly Hat, highly polished, very intense black. Abdo-
minal segments decreasing uniforndy and very gradually in width, lirst as
wide as the contiguous elytra, sub-(!yliiidri(^al after the first ; border nearly
obsolete, except on the lirst where it is prominent ; surfact^ very deeply,
closely, and evenly i)unctate; punctures as large as those of the pronotum ;
transvei'se carinae slightly cusped in the mi<ldle. Legs moderate in length,
slender, black, tarsi i)ale fulvo-testaceous ; first joint of the posterior as long

as the last two together, also as long as the S(!coiid and third together, s nd

nearly twice as long as the third; fourth joints small, lobes small; third
joints very deeply emarginate at tip.

Mitlf.. — Unknown.

Female. — Sixth ventral segment broad and very obtuse biOiind, produced
in the middle in the form of a broad cusp, point very feebly rounded, sides
near the cusp feebly sinuate.

Length 4.4 mm.

Arizona, 3.

The punctuation, very dt'ep, close, and regular, reminds us of that of
piiif/in'Sjirom the Pacific Coast. Tiie intej^unieuts in tiiis species are
of an iniense black, differing from the usual grayish-black of tlie more
closely-allied s[)ecies. The large head, sub-quadrate depressed elytra,
very pale palpi and tarsi, and deep dense punctuation, will aid in
identifying it.

Tlie conformation of the tarsal claw is shown on the plate ; it is
much more slender and less abnormal than in other species in this
vicinity.

2(). A« Obsoletlis n. sp. — Form rather slender, sub-eylindrical. Pubes-
cence short, rather coarse, moderately spatHe, evenly distributed, cinereous.
Head rather small, scarcely twice as wide as long; inli^rocular surface nearly
Hat, three-fourths wider than the eye ; equally divided by the sulcations,

.a:-.^

I -l^HIT t"\; T

ii!P>'

182

NORTH AMERICAN

!• ::i'

m

w)iii'li arc scan^cly visible! ; piiiietiires large, rduiid, deeply iini>ri'sse(l ; evenly
ilistriliuteil, distant l)y alxiiit one-lialf their own widtlis ; iiitersi>a('es ])()lislied;
ocular lines meeting at abont oni! length in advance ; antennae nuidi longer
than the width of head, i)ale testaceous, darker toward tip, slender, ( Itih
moderate; third joint oius-lialf longer than the fourth, eighth moris rolinst
than the seventh, joints of dub slightly elongated ; maxillary palpi slender,
l»ng, llavate, tliiid joint slightly dnsky toward tip. Prothorax arcnatidy,
evenly, and gradnaily incieasing in width to the nnddle, where it is tour-
fifths as wide as tiie head and distinctly narrower than long; sides thenc«
rather more vapidly convergent postiM'iorly and feebly sinuate; anterior and
posterior niaigins equal in length and curvature, ratlua- teebly arcuate;
surface closely, finely, deeply, and evenly punctate ; interspaces convex
and iiolished. Elytra at base about e(iual in wiilth to the head ; sides
ratlicr feebly ilivegiMit posteriorly, slightly longer than the width at base,
rather strongly arcuate, more strongly so ])osteriorly ; together broadly,
roundly, and rather strongly emarginate behind ; suture nearly one-fourth
longer than the pronotum ; surface convex, slightly impressed on the suture
toward the base, closely, nearly evenly, rather linely, and very deeply
]iunitate; intei'si)aces narrower than the punctures, very convex, jiolished.
Abdominal segments cylindrical, decreasing uniformly and rather raj)idly in
width, tirst distinctly narrower than the contiguous elytra; border obsolete;
surface very closely, coarsely, deeply, and conspicuously jiunctate ; each seg-
ment strongly constricted at base ; transverse carinae not cusped, finely un-
dulated. Legs rather long and slender, piceo-fuscous, femoi'a much pahir
beneath ; first threi! joints of the posterior tarsi uniforndy decreasing in
length ; fourth joints strongly bilobed.

Mull'. — Sixth segment very narrowly and deeply incised, angle of incisure
very slightly I'ounded, nearly acute, depth more than twice its width ; seventh
segment narrowly and feebly emarginate at tip, emargination rounded, teeth
small, acute, iindined inward.

lu'iiKilc. — Sixth segment broadly and ohtusely roundiMl behind. Elytra at
base usually slightly wider than the head ; foru) more robust ; abdomen wider.

Length 3.0 mm.

Grimsby, Ontario, /),

Tlii.s s|)e(!i('s hcurs ii jfieiit reseml)liiiicii to piinctatus (Er.), und also
to infiis. It (liHi'is from the former in its more slender form and
finer punctuation, and especially in its much more slender prothorax;
from iirtiis it (lilfcrs in the form of tiie pronotum, which in that species
is very slender and notai)ly narrowed anteriorly.

Ik

27. A> an'tlis n. sp. — Form very slender. Pubescence sparse, very fine,
semi-erect, dark j)lunibeoiis, scarcely visible ; entire surface of the body
highly polished. Head rather small, robust, nnicli less than twice as wide
as long; interocular surface nearly fiat, one-half wider than the eye; sulca-
tions narrow, not consi)icuous ; intermediate surfact^ as wide as the lateral
portions, very feebly convex ; punctures large, round, deeply impressed,
nearly evenly distributed except in the sulcations, where tliey are slightly

COLEOrTERA.

188

smaller and iiiori! crowded ; su|iru-!intfiinal tiilM-rciihitioiis l<>iig, narrow, ini-
punctate, iironiiiiciit ; ocular lin<'s iiicctiiif,' at scarcely oiio Icnjjtli in advance;
antennae inncli lon;,'er tlian the width of head, rather pale itii^eouH-hrown,
slightly darker toward tip, liasal joints paler, opacjnc, ochri^jns ; third joint
one-tliird longer than the fonrtii, seventh nnich lonf;er than the einlitli, less
rolnist, ninth and tenth scarcely lonf^er tiian wide, last iiioi'(' elongated ;
maxillary jialpi very long and slender, pale llavate, third joint very slightly
cloiidud toward tip, very slender, uiucli shorter than tli« first and second
togi'tlier. Prothorax ar<'nately and rather rapidly increasing in width to a
])oint slightly 1 'hind tliemiildle, where it is much narrower than long; sides
theniu- very fee, )ly convergent ])ostHriorly and distinctly sinuate; anterior
margin distinctly shorter and more arcuate than the posterior ; tlie latter
nearly str.'iiglit, and lint very slightly shorter than the grc^atest wi<Uh of the
prothorax ; surface evenly and strongly convex, rather coarsely, closely, and
evi'nly puni^late ; ininctures deeply impressed; interspaces convex; along
the middle for a short distanct! there is a narrow canaliculation, terminating
at equal distances from the bases, and apparently formed by coalescent i)unc-
tures. Elytra at base as wid(\ as the henil ; sides nearly parallel, slightly
longer than tln^ width at base, rather strongly arcuate, slightly more stnuigly
so posteriorly; together broadly, roundly, and v(-ry strongly euiargiuate
behind; suture scarcely one-eighth longer than the pronotum ; surface vi'ry
conv<!x, feebly and narrowly inipressc^l along tint suture, very coarsely,
closely, and evenly punctate; punctui(^s round, deeply impressed, distant by
less than their own widths ; intersjiaces very convex. Abdominal segnuMits
decreasing uniformly and very grailually in width, lirst distinctly narrower
than the contigU(ms elytra, cyliiidiical, slightly cons'victed at bas(f ; surface
rather coarsely, very closely, and evenly punctatt! ; pLinctures rather irregu-
lar in outline, somewhat deeply impressed, becoming much smalhu' and
slightly more distant on the posterior segments ; transverse carinae not
cusped, arcuate in the middle, finely and somewhat fi'ebly undulate jilong
the posterior edges. Legs short ami ndiust, pah' o()aiiue yt^llovvish-browu
in color; first joint of the posterior tarsi slightly shorter than the next two
togetlu'r, distinctly shorter than the fifth ; fourth joints strongly bilohed,
lobes narrow.

Male. — Sixth v(!ntral segment very deeply and narrowly incised at apex,
incisure nearly twice as deep as wide, narrowly rounded at the anterior
angle, exterior angles rather broadly rounded, siiles nearly straight; seventh
broadly, roundly, and rather feebly emarginate at apex, lateral teeth very
minute, straight.

FciiKile. — Unknown.

Length (abdomen extended) 3.1 nua.

New York, 1.

Tlie peculiar form of the, prothorax will distinguish this species
from ohsoletus ; other dirt'erences are found in tlie structure and
punetnution of the elytra and maxillary palpi, and also in tiie very
peculiar opaque, ochreous-yellow color of tlie legs, wiiich are much
less densely pubescent than in the allied species. The sexual char-

k

ill

184

NOUTII AMKniCAN

S:,

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actcrs lire ulinust exactly the same as those of the above-mentioiit'd
species.

2S. A. (lillltllH 11. sp. — Fdini vi-i-y slfiidcr. I'libcscciico very sjtarsf, /iiic,
(lark jiliiiiilic'oiis, s(rarc'el.v viMil>l(». Head robuHt, less tlinii twice ns widons

Idiif,' ; iiitfi'oi'iilar siirl'iiof ll;it, twu-tliinls wider ttiiiti tlic fyc ; siilcatifnis very
narrow, I't'clili' and ol)s(.'nrc ; intcniiccliatc snrlaci' i-xccssivcly ffdily coiivi'x ;
lUinctiiri'M ratlicr coarse and deep, nearly ali.si'iif aloiif; tlie iiiiildli', iiiorr
crowded in tlie snlcatioiis ; oenlar lines ineetiii;,' at one leiifitli in advance;
antennae distinctly loiif^er than the widtli of head, rather pale brownish-
testaceous, club distinctly darker, rather proiniiieiit ; third joint one-third
l(iiif,'er than the fonrtli, eiyhtli scarcely loiif^er than wide, very robust, iniicli
shoiter and thicker than the seviMith, joints of (dub increasin;,' iiiiit'orinly and
rather },'radnally in length; maxillary palpi long and slender, llavati", third
joint slender, nearly as long as the lirst two together. Prothorax widest at.
the inidille, where it is nmcli narrower than long; sides thence etinally and
extremely feebly convergent anteriorly and ]>ostericrly, nearly straight in
both cases ; anterior and jMisterior margins c(|nal in length, the former rather
strongly arcuate, the latter very sliglitly more feebly so; surface evenly and
strongly convex, nearly cylindrical : j)unctiires deeply impressed, very close,
rather unevenly distiibuted, somewhat .small; interspaces strongly convex,
liighly polishecl. Elytra at base as wide as the head ; sides nearly parallel,
distiiicliy longer than the width at base, nearly straight towaril the biinieri,
very strongly arcuate towanl the exterior ajiical angles ; together broadly,
somewhat angularly and strongly emarginate behind ; suture about one-
tenth longer than the pronotnm : surface strongly convex, narrowly and
feelily iin|iri'ss('d along the suture, more strongly so toward the base,'
coarsely, deeply, and closely punctate, pieeous in color; luinctures soiiks-
what irregular in outline, distant by less than their own widths ; inter-
spaces strongly convex, highly polished. Abdominal segments decreasing
nearly uniformly and just percc^ptibly in width, first iiinch narrower than
the contiguous elytra, cylindrical, strongly constricted at base ; transverse
carinae broadly and strongly undulated ; surface strongly, closely, and
evenly punctate ; interspaces convex, polished, not as wide as the punc-
tures. Legs slender, pale brownish-testaceous throughout, tarsi short; first
joint of the ])osterior nearly twice as long as the second.

Mti/<'. — Fifth ventral segment scarcely perceittibly, roundly, and narrowly
emarginate in the middle at apex ; sixth narrowly and deejdy incised at tip,
incisure more than twice as deep as wide, anterior angle very narrowly
rounded, exterior angles narrowly rounded, sides slightly arc^nate; seventh
segment broadly and feebly emarginate at the vertex, emargination nearly
transverse at the bottom, lateral teeth short, stout, and straight.

Ffjiuile. — Sixth segment very broadly and evenly rounded behind.

Length 3.0 mm.

Louisiana, 2.

The piccoiis color of the elytra and portions of the abdomen seen
in the above-described species, and also to a certain extent in the

li

COLKOrTKKA.

1H5

elylm of nrtim, is not, to tlie best (»f my knowlcdp;*', due ontin-Iy to
iintniiliirity, lint is :( f'ctitiin' of the inatiirc insect.

Tlic (listinjinisliinji cliiintfttrs licldii^inj; l<i tiic tlinv spcrics, <(i/ii.
(lis, nrfiis, and ohsofttiis, arc in the iMinctuation of tlit* clytia, wliicli
is inucli the finest and Ldosest in tiic hist, ami in tiie strnctnre of the
piDlhoiiix, wiiich renders arfns inniie(Iiately reeoi^nizahie. The sexual
ciiaractcrs are strikin^fjy iinitorin throu^^hoiit the series.

2!t. A> meriilioiltllls n. sp. (Sdiwarz MS.). — Form slender, sult-cylin-
driciil. l'iilii'-;cciiii> iMtlhT simrse, slmrt, evenly ilistrilmteil, siili-rei'miiliciit,
cinereous, ratlicr ineonspicnous. Kntire liody nioderatidy Hhiniti>;. Head
ratlier roliust. srareely twice as wide as loii}; ; interoriilar surface scarcely ime-
tiiivd wid<'r liian IIk' eye, nearly tiat ; snications almost entirely olisolcte ;
punctures rather sparse and irre^jularly distrilmted : ocular lines meeting
at less than one hinsjth in advance; eyes very ])r(iminent ; anti'Unae short,
scarcely lonf;er than the width of head, i)iceous-l(i'own, ilarker toward tip,
slender, clul)stron<,' ; third joint one-fourth loUfrer than the fourth, eii;lith more
rohust than the seventh, last joint of ciuh as long as the eighth and ninth
together; basal joint of antenna slightly paler ; niaxillaiy )>ali)i very hing
and slender, almost as long as the antenna, tiavate, tijiof third Joint slightly
darker. Prothorax arciuUely, evenly, and v<'ry gradually increasing in width
to the middle, wliere it is one-eighth narrower than long and scarcely thi'ee-
fourths as wide as the heail ; sides thence equally convergent posteriorly
and feehly sinuat(> ; anterior and jHisterior margins snh-equal in length and
curvature; surface finely and somewhat confusedly punctate; punctures
tending to coalesce transversely. Elytra at hase e(|ual in width to the head,
or hut very slightly narrower ; sides ])aiallel, slightly longer than the width
at hase, nearly straight toward the humeri, slightly arcuate toward the
a]>ic<'S ; together roundly iiud rather strongly emarginate hehind ; suture
slightly lunger than the pronotum ; surface rather strongly impressed on the
suture toward the base; punctures large, close, nearly evenly distributed,
distant by about one-half their widths. Abdominal s(>gments decreasing
uniformly and just percejitilily in width, first much narrower than the con-
tiguous elytra, cylindrical ; border obsolete; strongly constricted towjird the
base ; surface coarsely, closely, and evenly jmnctate ; punctures larger than
those of the pronotum, deeply impressed, almost polygonally crowdeil ; trans-
verse carinae not cusped. Legs somewhat long, very slender, uniformly pale
piceous-brown ; first joint of the posterior tarsi not as long as the next two
togt'ther ; fourth joints strongly bilobed, lobes very narrow.

Mule. — Posterior edge of the fifth ventral segment just visibly emarginate
in its middle sixtli at apex, emargination ronnd<'(l and excessively feeble ;
sixth segment very deej)ly and somewhat narrowly incised at apex, incisure
extending anteriorly througb two-thirds of the segment, angle sligbtly
rounded, sides nearly straight, exterior angles slightly rounded, slightly
more than twice as deep as wide ; seventh triangularly emarginate at tip.

Fi'mule. — Sixtli segment strongly, broadly, and somewhat angularly rounded
behind ; seventh acuminate at tip.

Length 2.3-2.7 mm.

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IMAGE EVALUATION
TEST TARGET (MT-S)

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NORTH AMERICAN

Floridft (various localities), 13. ' '

Tliis is the smallest species of" the genus, and is remarkable for the
large eyes and strong punctuation of the doi-sui suri'ace of the abdo-
men.

>: ^ii!

\4 r:

30. A.callOHUS (Er.) — Form rather slinidi^r.siili-cyliiulric.il. riilicsctciice
ratlicr sparse and ine(ms|)i('iious, loiif^cr on the alxlonieii, wliere it is slightly
denser, einereons. Hoily very liighly polislied. Head small, twice as wide
as long ; interoenlar surface tM'ice as wide as the »>yt% Hat ; sulcations broadly
rounded, rather faint; snpra-antennal tuherculations elongateil, iiiipunctate;
surface between the sulcations highly polished and inipunctate ; punctures
small, confusedly crowded in the sulcations ; ocular lines meeting at about
one length in advance ; antennae distinctly longer than the width of head,
slender, i)ale piceous-brown, distal ends of the joints darker, club modt^rate,
much darker; third joint nearly one-half longer than the fourth, joints of
dul) increasing in length and width ; maxillary paljii very long and slender,
tt;".at(! throughout. Prothorax arcuately, evenly, and extremely gradually
increasing in width for two-thirds the length jMisteriorly, where it is very
slightly narrower than long ; sides thence very feebly convergent and dis-
tinctly-sinuate; anterior and posterior margins nearly equal in length, the
former distinctly arcuate, the latter nearly straight; surface rather tinidy
and evenly jumctate ; i)unctures generally separated by less than their own
wiiUlis, a fusiform spact; in the middle of the disk inii)nnctate. Elytra at base
slightly wider than the head ; sides nearly i)aralt<d, very strongly arcuate
near the apices, nuich less so near the humeri, very slightly longer than the
width at base; together broadly and moderately emargiiiate behind; suture
nearly one-lifth longer than the pronotum ; surface very feebly imi)ressed on
the snturt^ toward the base, finely and evenly punctate; punctures round,
impressed, distant by ni^'arly twice their own widths ; interspaces convex, ex-
trenii'ly highly polished. Abdominal segments decreasing nearly nniforndy
and somewhat rapidly in width, first distinctly narrower than the contiguous
elytra, cylindrical; l)order obsolete; strongly constricted at base; surface
finely, distfintly, and irregularly punctulate ; transverse carinae not cusped.
Legs long and slender, pale piceo-Havate, tips of femora darker, tarsi rather
short ; first joint of posterior as long as the next two together ; fourth joints
strongly bilobed.

Malv.. — Posterior edge of the fifth veiitral segment emarginate in its ntiddle
fourth, emargination rather feeble, more acutely rounded at bottom, nearly
eight tiines as wiile as deep ; sixth segment very broadly incised at apex,
incisure occupying the entire apex, nearly four times as wide as deep, sides
straight.

Female. — Sixth segment evenly rounded behind. r

Length 3.0-3.2 mm. _ , ..,

Florida, 19; Louisiana, 1 ; District of Columbia, 2.
IJeadily recognized by its very pale legs and distinct sexual cliur-
acters. It is peculiarly southern in its habitat.

■^i^

COLEOPTERA.

187

31. A, varipes n. sp. — Form iiH in atllii.iit.i. Piibiisceiice riitlier coar.su,
semi-erect, si)ars(', ex(;t!])t on the abdonien wlien; it increases in density
tow.'U'd till' tiji, cinereous, rallier consjiicwons ; iiitef,'iiinents lii>,'lily polislied.
Head uiodtM-ate or ratlier small, dlstincttly more than twice as wide as long;
lahrnm prominent ; interocular surface nearly three times as wide as the
eye, very feelily convex; sulcations nearly obsolete; intermediate snrface
bi'oad, very fi'ebly convcix, broailly impunctato in the middle; punctures
elsewhere rather coarse, deep, close, and irref^ular ; supra-antennal tubercu-
lations elmigati'd, impunctate ; antennae much longer than the width of liead,
rather slender, piceo-testaceous, darker and opaque toward tip, translucent
toward tlie base, clnb slender ; third joint fully one-third longer than the
fourth, fourth and fifth equal, sixth much longer than the seventh, the
latter sliglilly more I'obust, eighth very slightly longer than wide, joints of
club nearly cylindrical ; maxillary paljii long, first two joints and base of
tin; third very slender, third rapidly and very strongly enlarged toward tip,
no longer than the second, all j)iceo-testaceous ; the third joint is distinctly
darker abovi^ than beneath ; first joint on(^-half as long as th<^ S(?cond. Pro-
thorax widest slightly in advance of the middle, where it is distinctly nar-
rower than long; sides thence very feebly convergent posteriorly and rather
strongly sinuate throughout ; anterior ami posterior margins long, equal, and
nearly transverse; surface coarsely, closely, and deeply punctate, having a
rather large; impunctate area in the middle of the disk. Elytra at base just
perceptibly wider than the liead ; sides jiaralltd, strongly arcuate, most
strongly so at two-thirds the length from the humi^ri, much longer than the
width at base; together rather narrowly an<l sti'ongly emarginate behind;
suture about one-third longer than the pronotnm ; surface hsebly and rather
broadly imi)ress(Hl on the suture at the base, otherwise! nearly evenly convex ;
punctures coarse, ne^arly evenly distributed, very deep, distant by iilmut
their own widths, slightly variable in size ; interspaces convex. Abdominal
segments decreasing uniforndy and rapidly in width, cylindrical, first very
slightly narrower than the contiguous elytra, each constricted rather strongly
at the base, border obsolete except on the first segment ; evenly, strongly,
and rather loosely punctulate ; transverse oarinae finely and irregularly
undulated. Legs rather robust, basal half of femora, tibiae, and tarsi pale
ttavo-testaceous, distal half of feniora rather abruptly much darker, casta-
neous, tarsi robust ; first joint of the posterior four-fifths longer than the
second, longer than and nearly twice as robust as the fifth ; fourth joints
bilobed, lobes rather short and robust.

Male. — Posterior edge of the fourth ventral segment very broadly find
feebly emarginat(( in its ndddle two-fifths ; fifth roundly and feebly emargi-
nate in its middle third at apt^x, emargination about eight times as wide as
deep, contiguous surface flattened throughout anteriorly; sixth segment
narrow, apex broadly and deeply sinuate, sinus occupying nearly the entire
apical width, eviudy and rather broadly rounded at the bottom, nearly four
times as wide as deeji, apices very narrowly, though evenly rounded ; lateral
setae of seventh segnusut very long and coarse, testaceous.

Feiiiale. — Unknown. - . -

Length 3.0 mm. . . . . , . , , . .. •

i

1 /-i

?i^l

I'l-,

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188

NORTH AMERICAN

Detroit, Micliigan, 1. ■ ,

Tliis fiiifi species is distiiijznished with ease from cnllosus (Er.) by
tlie palpi, tiio last joint of wiiieli is sliorter, darker in color, and niiicli
mon^ stronjily and abruptly clavate in varipcs. The coloration of the
legs is also ditl'erent.

32. A. arcilllis (Kr.) — Form rathfi'slonder, sub-cylindrical. Pubescence
sparse, iuconsiiicuous, rather long and coarse on the alidome.i, cinereous.
Body liij^lily polished. Head small, robust, not twice as wide as long:
interocnlar siirl'aci! twice as wide as the eye, very feebly (;onvex, rather
acutely 8o in the middle ; sulcations almost obsolete ; supra-antennal tuber-
culations much elon>^ated, inipun(!tate ; j)unctures coai'se, deeply iiu])ress«>(l,
nearly (evenly distributed, close; ocular lines meeting; at one and one-half
lengths in .idvance ; antennae rather short, scarcely longer than the width
of head, stout, ])ale piceo-testaceous throughout, club moderate, joints beyond
the first slightly darker at their distal extremities ; third joint one-half
longer than the fourth ; maxillary palpi very long, tirst two joints very
slender, llavate, third infuscate toward tip. Prothorax arcuately, evenly,
and gradually increasing in width for two-thirds the length j)n.sterioi'ly,
where it is narrower than long, sides thence moderately convergent and
very strongly sinuate ; anteri ir Miargiu slightly shorter and more arcuate
than the posterior ; surface rather cotarsely, very closely, deeply, and some-
what evenly punctate ; a median lini! is generally impunctate. Elytra at
base just perceptibly *ider than the head ; sides very feebly divergent
posteriorly, aa long as the width at base, very strongly and nearly evenly
arcuate ; together broadly, somewhat angularly and very strongly emargi-
nate liehind ; suture about one-eighth longiu- than the jjronotnm ; surface
very convex, very feebly and narrowly impressed on the suture toward the
base, coarsely and rather closely punctate ; ])unctures very deeply imprissed,
round, rather irregularly distriliuted ; iiitersj)a(!es very convex. Abdominal
segments decreasing uniformly and very gradually in width, first much
narrower than the contiguous elytra, cylindrical, rather strongly constricted
at base; bonier obsolete; surface strongly, closely, and evenly i)unctate ;
punctures but slightly smaller than those of the pronotum ; traiTsverse
carinae not cusped. Legs shnider, piceous-brown, bases of the tibiae j)aler ;
first three joints of the posterior tarsi much elongated, uniformly and gradu-
ally decreasing in length ; fourth joints moderately bilobed.

Mall-. — Posterior edge of the fifth ventral segment narrowly, roundly, and
rather feebly emarginate in the niichlle ; sixth narrow, sinuate at apex, sinus
small, acutely rounded at the bottom, slightly more than twice as wide as
deep.

Female. — Sixth segment broadly and evenly rounded behind. ' '

Length 2.8-3.4 mm.

Michigan, 7 ; Nebraska, 1 ; Middle States, 7 ; District of Columbia,
5; Canada, 2 ; Cambridge, MiUisachusetts, 4; Texas, 2.

The under surface of the abdomen is more densely pubescent than
the upper. The species resembles ca/losus (Er.), hut is separated
easily by the male sexual characters and color of the legs.

I

COLEOI'TKRA.

189

^

33. A. Iltinctaiflis (Er.) — Form inodcratfly robust. Pulx'sccnco very
Mpar.se, fiiK^, short, evenly di.strilmteil, (birU ciiieieous, scarcely visible; entire
surface shiniiif;. Head somewhat small, nearly twice as wide as Ion;; ; inter-
ocular surface Hat, nearly three-fourths wider than the eye ; sulcations almost
entirely obsolete; intermediate elevation very feebly convex ; punctures rather
coarse, st:ialler and much closer in the depressed portions, a very narrow ir-
regular median line is almost impunctate ; ocular lines meeting at one length
in advauci;; antennae distinctly longer than the width of hefvd, rather slen-
der, ))ali' testaceous, darker at tij) ; basal joints twice as long as wide, club
jiromiuent ; third joint two-lifths longer than tbe fourth, eighth shorter and
much niort! robust than the seventh, joints of club much elongated, increas-
ing rapidly in leniith, (deventh as long as the eighth and ninth together;
maxillary j)al[>i long, first and second joints slendcu', translucent, pale tlavo-
testaceous, tlm latter slightly darker toward tip, third nearly as long as the
first two together, becoming gradually robust towanl tip, sliglitly darker,
very slender at base. Prothorax arcuately and very gradually increasing in
width to tbe middle, where it is just perceptibly narrower than long; sides
tlience slightly convergent posteriorly and distinctly sinuate ; anterior and
posterior margins eijual in length and curvature, feebly arcuate ; surface
evenly and strongly convex, rather finely, closely, deeply, an<l evenly ])unc-
tate ; interspaces convex, nearly equal in width to tbe punctures. Elytra at
base about equal in width to tbe bead ; sides very feebly divergent posteriorly,
very slightly longer than the width at base, rather strongly arcuate, especi-
ally toward the ajjici^s • together broadly, roundly, and moderately emargi-
nate behind; suture nearly one-third longer than the pronotum; surface
very convex, very feebly impressed on the suture at tbe base, evenly, deeply,
and moderately coarsely punctate ; punctures dee])ly impressed, distant by
less than their own widtiis ; interspaces very strongly convex. Abdominal
segments decreasing uniformly and very gradually in width, cylindrical,
first much narrower than tbe contiguous elytra ; border obsolete, very narrow
on the first ; surface very deeply, coarsely, closely, and evenly punctate ;
interspaces scarcity one-half as wide as tbe punctures ; transverse carinne
not cusped, strongly and finely undulated. Legs slender, rather pale
brownish-testaceous, femora very slightly darker toward tips, tarsi rather
robust; first joint of the posterior as long as the next two together, fourth
joints narrowly and not very conspicuously bilobed.

Male. — Sixth ventral segment narrowly and deeply incised at the ajjex,
incisure about twice as deep as wide, sides nearly straight, exterior angles
feisbly rounded ; seventh segment broadly and evenly emarginate behind,
lateral teeth distinct.

Fewule, — Sixth segment broadly and evenly rounded behind.

Length 3.0-3.3 mm.

Micliigiin and Lake Superior (various localities), 81 ; Pennsyl-
vania, .") ; Willets Point, Lows Island, 2 ; New Jersey, 1 ; Cam-
bridge, Massachusetts, 4; Disi.irt of Columbia, 1.

Appears to be a very widely distributed sfiecies, especially in the
interior of the continent. The forms in this portion of the genus are
80 extremely closely allied, that it ia a matter of great difficulty to

I'J

190

NORTH AMERICAN

1;^';!

.1

if

rw

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1 ,1 .• ,

decide upon the proper specific limits. The present species differs
from ohsoletns only in its more robust form, especiidiy of the protlio-
rux, and in its coarser punctuation. Tiiere seems to be considerable
variation in the lustre, the males being more polished than the I'eniales.

34. A. (liHsentienH n. S[). — Form slender, snli-cvlindrical. I'nliesceneo
moilerate in Icngtli, sliglitly denser on the alpdoineii, rather sparse, somewhat
inconspiuuous ; entir« surface strongly sliining. Head moderate or small,
twice as wide as long ; interocular surface twice as wide as the eye, very
I'eeMy convex, e(jually trilohed liy the very feeble sulcatioiis ; intermediate
surface moderately and nearly evenly convex, narrowly im[)unctate along the
niidillt>; punctures rather coarse, deeply ini])ressed, rounded, close ; ocular
lin(!S meeting at one length in advance ; antennae very slightly longtu- than
the width of head, rather robust, jticeo-testaceous at base, becoming dark
piceous-brown at tip of tdub, the latter compact and distinct; third joint
slightly more than ont-tbird longer than tlie fourth ; maxillary palpi v^'ry
long, slender, piceo tlavatt', becoming slightly darker toward tip. Prothorax
arcuatety and evenly increasing in width to a point nearly two-thii'ds the
length posteriorly, where it is slightly narrower than long ; sides thence
feebly convergent and slightly sinuate ; anterior margin slightly sliorter and
distinctly more arcuate than the i)osteri(ir : surface nearly evenly convex,
very feebly and transversely Impressed just hehind the apex ; punctures
moderate in size, round, rather deeply impressed, very close, evenly ilistri-
butcd. Elytra at base as wide as the head ; sides paralbd, slightly longer
than the width at base, rather strcnigly arcuate toward the apices ; together
broa<Uy, somewhat angularly and moderately emarginate behind ; suture
ouc-fciurlh longer than the pronotum ; surface rather strongly and narrowly
impressed on the suture toward the base, also feebly imi)ressed near each
humeral angle ; i)unctures coarse, nearly evenly distributed, round, dHe])ly
impressed, distant by slightly more than their own diameters. Abdominal
segments decreasing uniformly and gradually in width, first slightly narrower
than the contiguous elytra, cylindrical ; border obsolete except on the first
segnuait ; surface coarsely, closely, deeply, and evenly punctate ; transverse
cai-inae not cusped, unevenly toothed. Legs short, rather slender, piceo-
fuscous thougbout ; lirst threi^ joints of the posterior tarsi decreasing uni-
forndy and rather rapidly in length, first much shorter than the next two
together ; fifth as long as the lirst three together ; fourth joints strongly
bllobed.

Male. — Unknown.

F'liKile. — Sixth ventral segment obtusely rounded behind, slightly, but
rather acutely produced at tho iunnediate vertex.

Length 2.7 ram. . .,

Lake Superior, 1.

Thiit species in jreneiai appearance resembles poUtulus from Van-
couver Island, but is readily distinguished from it by the structure of
the prothorax and posterior tarsi, also by that of the interocular sur-
face of the head and the maxillary palpi.

COLKOl'TEKA.

191

M

35. A. Illlbbarili n. sp. — Form ratlitT lolnint. Puboswico very (inf,
short, ratlicr si>.irsi', dark ]i1uirilK'oiis, scarcely visililc ; entire surface very
lii^lily polished. Head small, twico ns wide as loiijj ; iiiterociilar surface
twice as wide as the eye. Hat ; snlcatioiis hroailly rounded, narrow, and fetdtlo ;
intermediate siirfac(' narrow, acutely convex, very narrowly iiiijuinctate
aloiii; the middle ; j)\inctnres rather coarse, deei>ly impressed, round, nearly
evenly distributed, distant by nearly their own widths ; interspaces conv(?x ;
ocular lines meetinij at nearly two lengths in advance: lalniiin small;
antennae very slii,'htly lon<,'er than the width of head, transltic<'nt, dark
piceo-testawous toward bast^, iH^coniing black toward tip, club rather slen-
der ; third joint one-half longer than the fourth, Joints of club increasing
rapidly in length, sparingly puhe.sc<'nt ; maxillary i)ali)i long and slender,
first joint rather dark piceo-testact-ou.", remainder ilark piceoiis-brown, tliir<l
joint clothed densely with cinereous, setiform pulx-scence. Prothorax widest
at th(i middle, where it is scarcely narrower tlian long; sides then<;i' very
feebly convergent and straight anteriorly, slightly more convergent and just
visibly sinuato posteriorly ; anterior margin slightly longer than the poste-
rior, more strongly arcuate, post<'rior rather strongly arcuate ; surface nearly
nvenly conv(^v ; punctures rather small, <'venly disti-ibuted, ronn<l, rather
deeply impressed, distant generally by nearly their own widths. Elytra at
base very slightly wid(T than the head ; sides nearly parallel, much longer
than the width at buse, almost straight toward the hum<>ral angles, strongly
arcuate toward the aj)ic<'s ; outer apical angles very acute and i)romiiient ;
together broadly, roundly, iiid rather feebly emarginate Itehind ; suture
one-third longer than the pronotuin; surface strongly conv<'x, very feebly
impressed on the suture toward the base; punctures round, very deeply
impressod, nearly evenly distributod, distant hy much less than tlieir own
widths; interspaces very convex. Sides of the abdomen slightly inwardly
ourvate; lirst segment slightly narrower than the contiguous tdytra, third
and fourth equal in width, narrower than the first, all strongly constricted
at base, cylindrical ; transverse carinae not cusped : surfac(? very strongly,
closely,- and evi'uly punctate ; punctures nearly as large as those of the
elytra; int<^rspac<>s alniut one-half as wide as the punctures, very convc^x.
Legs rather short and robust, very dark fuscous throughout in color ; first
joint of the posterior tarsi two-thirds as long as the fifth, much shorter than
the second and third together ; lobes of fourth joints very long and narrow.

Male. — Fifth ventral segment very narrowly emarginate in the middle of
its posterior edge, emargination more acutely rounded at the bottom than at
th»> sides, minute, alwut five times as wide as deep ; sixth segment narrowly
and very deeply incised at the apex, incisure nearly twice as deep as wide,
sides straight, exterior angles very feebly roundtnl ; seventh segment broadly,
roundly, and strongly enmrginate at tip, edges of emargination undulated at
the bottom, lateral teeth strung, broad at base, straight.

/■hndle. — Unknown. -■'/-•

Length 2.8 mm.

Batclieliwauung Bay, Lake Superior, 1.

The distinguishing features of this vefy distinct species lie in the
very robust prothorax, proportionally long elytra, antennae black in

\ i

Hh

,'i'(

% if

192

NOKTII AMERICAN

llic distal liiilf, uiid in tlie very strong punctuation of tlie under surface
of tiie tilxlonicn in tiic males.

Dt'(licat«Ml to Mr. II. (i. Iluhhanl, to wlioso scientific collecting in
this portion of tin; country, a great deal of the existing material is due.

3(1. A* laetlllllH II. sp. — Form rattier slender, sul^cyliiidrieal. I'libes-
cenct) riKideriite in leiiu'tli, .sllli-rci'iinilM'iit, excc.i.sively spiirse, i>lmiil>e(>-ciiu'-
reoiis. Head moderate, twice as wide as loiij; ; intiToi'iiiar snrt'act! tlat, twice
as wide as tlie eye ; longitudinal elevation narrower than the lateral [vortions,
very stronj^ly and evenly eonvex, entirely iutjunu'tate and very lii^lily
jioIIsIkmI ; sulcTtions eonver;j;ent anteriorly, stronj; ; lateral loWs cfinvex
with a very few widely seiiurated, small, deeply impressed punctures; inter-
spaces very wid«, convex, and highly polished ; su])ra-nntei)nal tubercula-
tions very pron\inent, highly polished, and intpnnctatc!, separated from the
eyes by short sulcations ; ocnlar lines ineeti)ig at one length in advance;
antennae longer than the width of head, very pale rwldish-testaceous
throughout, slender, club moderate; third joint one-third longer than the
t'(;iirth, fourth and tifth sub-eijual, sixth much longer and very slightly
narrower than the seventh, eighth distinctly shorter than the seventh, equal
to it in width, joints of clul) increasing in length, elongated, sub-cylindi'ical,
v(My sparstdy jiubescent ; maxillary palpi elong;Ued, i>ale j>iceo-testaceous
throughout. Prothorax widest at the middle, where it is four- tilths as wide
as the head and slightly narrower tliau long; sides thence very fetdily con-
vergent posteriorly and feebly sinuate ; anterior margin slightly shorter and
more arcuate than the i)osterior ; surface evenly convex, very sparsely and
uueiiually punctate; punctures very deej)ly impressed, round ; intersj)aces
convex and extremely highly polished. Elytra at base very slightly wider
than the heail ; sides very feebly divergent posteriorly, as long as the width
at base, very strongly and evenly arcuate ; together broadly and rather
strongly emarginato behind ; suture one-sixth h)nger than the pronotuni ;
surface strongly convex, very feeldy and narrowly impressed on the. suture
at the base ; sparsely, coarsely, and somewhat evenly punctate ; punctures
round, wid(dy isolated, very deeply impressed ; interspaces very convex,
wider than the punctures, highly polished. Abdominal segments cylindri-
cal, (hx-reasing uniformly and rapidly in width, tirst much narrower than the
contiguous elytra ; surface very highly polished, very finely and sparsely
punctulate ; border obsob'te, except along the llrst segment ; transverse
cariuae tridentate, teeth very broadly rounded, short and rudii\ieutary.
Legs slender, piceous-brown ; first joint of the jxisterior tarsi distinctly longer
than the next two together ; fourth joints deeply bilobed, lobes slender.

Mali-. — l^ixth ventral segment very narrow, truncate at tip, where it is
bilobed, cusi) small but distinct, acute.

Fimiili'. — Sixth segment very broadly and evenly rounded behind.

Length 3.0-3.1 mm.

California (S. Buenaventura), G. , '. ;. ;>'

The under surface of the abdomen is very sparsely punctate, more
densely so on the last two segments ; extremely highly polislied.

COI.EOPTEUA.

193

more

37. A* leviceps n. Hp. — Form rather slender ; abdomen large. Pubes-
cence short, erect, fine, extremely sparse ; surface polished. Head very
small, twice as wide as long; iuterocular surface very feebly convex, nearly
twice as wide as the eye; longitudinal elevation feeble, crest broadly ini-
punctate, slightly wider than the lateral portions ; sulcatioiis very feeble ;
punctures coarse, sparse, deep, closer .n the depressed portions ; ocular lines
very convergent, meeting at about one length in advanct^ ; antennae ratlier
short and robust, piceous-brown, slightly darker toward the clul), the latter
not abrupt ; third joint scarcely one-third longer than the fourtli, eighth
mon^ robust than the seventh, slightly elongated ; maxillary jialpi long,
slender, third joint strongly clul)l)od ; piceous throughout, basal joint very
slightly paler. Prothorax small, robust, widest slightly behind the middle,
where it is as wide as long ; sides thence very feebly convergent posteriorly
and very slightly sinuate ; anterior anil posterior margins very long, sub-
equal, strongly arcuate ; surface coarsely, rather loosely, and very irregularly
punctate ; interspaces convex. Elytra at base distinctly wider than the
head ; sides feebly divergent posteiiorly, distinctly longer than the width at
base, strongly arcuate near the aj)iccs ; together broadly and very strongly
emarginate behind ; suture one-third longer than the pronotum ; surface
very narrowly and feebly impressed along the suture ; each elytron is also
impressed just in advance of the middh; point, and also very irregularly so
just behind the middle and near the exterior margins ; coarsely, very deeply
punct.-'.to ; punctures round, nearly evenly distributed, distant by slightly
more than their own widths ; interspaces convex. Abdominal segments
decreasing uniformly and somewhat rapidly in width, first very slightly
narrower than the contiguous elytra ; surface cylindrical ; border obsolete
except on the first segment, where it is very narrow ; punctures round,
deeply impressed, rather sparse, evenly distributed ; transverse carinae
strongly and finely undulated throughout. Legs very slender, black above,
tarsi and under surface of the femora and tibiae dark fuscous or piceous-
brown ; first joint of the posterior tarsi about as long as the next two
together ; fourth joints bilobed, lobes rather inconspicuous ; claws very
slender, sti'ongly curvate, bulbous at the base.

Male. — Unknown.

Female. — Sixth ventral segment very obtusely and evenly rounded behind.

Length 2.8 mm.

Vancouver Island, British Columbia, 1.

Very readily distinguished from IcRtuhis, which it somewliat re.^em-
bles by its very small head, and somewhat finer and closer elytral
punctuation.

38. A« politlllus n. sp. — Form rather slender. Pubescence very sparse
and inconspicuous ; surface very highly polished througliout. Head small,
about twice as wide as long ; interocular surface scarcely twice as wide as the
eye, nearly flat ; sulcations obsolete ;. longitudinal elevation very narrow,
impunctate and rather distinct ; punctures very coarse, deeply impressed,
nearly evenly distributed, close; interspaces convex; ocular lines meeting
at one length in advance, nearly straight ; antennae as long as the width of
Stesixi. 13

;'

194

NORTH AMERICAN

i

lioad, (lark piceous-brown, pivliT toward tlio bant', somewhat slender, club
modcratis tliird joint sdijjbtly niori' tliim om'-bnlf longer than tlic fonctli ;
maxillary palid well dovulopod, dark pict'oiis-brown, gradually becoming
Kli<,'litly juiler toward the base, tliird joint robust toward tip. Prothorax
nvciily ariMiatcly and very gradually increasing in width to tho middle,
wlicre it is as wide as long; sides thence very feebly convergent posteriorly
and rather strongly sinuato ; anterior and posterior iuargins equal in len;,'th
and curvature, very feebly arcuate ; surface di'uscly, coarsely, deejjly, closely,
and nearly evenly i>unctate. Elytra at base slightly wider than the liead ;
sides parallel, slightly longer than the width at base, rather strongly arcuate,
esi)ecially toward the apices ; together broadly, roundly, and moderately
emarginate behind ; suture slightly more than one-third longer than tho
pronotum ; surface narrowly and feebly impressed along the suture, espe-
cially toward the base, coarsely and evenly punctate ; ])unctures very deeply
imju'essed, round, distant by slightly less than their own diameters ; inter-
spaces strongly convex. Abdominal segments decreasing uniformly aiul
extrtimely slowly in width, cylindrical, first slightly narrower than th(* con-
tiguous elytra, eaoli distinctly constricted at base ; border obsolete except on
the first segment ; surface uniformly closely and coarsely jnmctate ; intervals
moderately convex ; transverse cavinae not cusped. Legs rather short, slen-
der, piceous-blaok at the coxae, gradually becoming slightly paler toward
the claws ; first joint of the posterior tarsi as long as the next two together,
second and third equal, as wide as long ; fourth joints strongly bilobed,

Aldle. — Posterior edge of the fifth ventral segment feebly, narrowly, and
roundly emarginate in the middle ; sixth very strongly, deeply, and rather
narrowly sinuate at tip, sinus rather acutely rounded at the bottom, more
than one-half deeper than wide ; seventh segment broadly, roundly, and
distinctly emarginate at tip, lateral teeth well developed.

Female. — Sixth segment very broadly and obtusely rounded behind, with
indications of an obtusely rounded production in the middle.

Length 3.0 mm. , .

Vancouver Island, British Columbia, 5.

II

39. A» simiolllS n. sp.—Form robust. Pubescence very short, sparse,
rather fine, dark piceo-pluinbeus, scarcely visible ; entire body very highly
polished. Head small, robust, much less than twice as wide as long ; inter-
ocular surface nearly fiat, obscnre ; intermediate snrfaoe rather strongly,
narrowly, and acutely convex; punctures rather large, evenly distributed,
deeply impressed, round, separated by much less than their own widths ;
interspaces strongly convex ; ocular lines meeting at nearly two lengths in
advance ; eyes large, thick ; antennae short and robust, as long as the width
of head, rather pale piceous-brown at base, becoming almost black at tip,
club rather prominent ; third joint one-third longer than tho fourth, seventh
three-fourths longer than the eighth, equal in thickness, eighth as wide as
long, nearly sub-quadrate, ninth and tenth nearly equal in length, eleventh
much longer ; maxillary palpi moderate in length, very slender, rather pale
piceous-brown, becoming slightly paler toward the base. Prothorax robust,
widest at the middle, where it is about as wide as long ; sides thence equally

COLEOPTKUA.

105

convergent anteriorly and postt>riorly, sli<;litly arcnntc In tlio former, nearly
Htraiglit in tlio latter diniution ; anterior ami juisterior niar^'ins e<iiinl in
length, the latter very slightly the more nrciiate ; surface rather feebly and
transvttrsely inii)rcsHe(l just lieliind the a]iex, otherwise evenly cjonvex ;
pun(!tures rather small, even, round, distant by nearly their own widths;
interspaces nuiderately convex. Elytra at base distinctly wider than the
head; sides extremely feebly divergent posteriorly, ecjual in length to thu
width at base, strongly arcuate ; togetlu^r broadly, roundly, and strongly
emarginate behind; suture one-fourth longer than tlie pronotum; surface
very convex, broadly and very fec'bly impressed along the suture ; punctures
rather coarse, even, round, deeply impressed, distant by their own widths;
interspac(>s very convex. Abdominal segments decreasing at first rather
rapidly, then more slowly in width, cylindrical, first very slightly narrower
than the contiguous elytra; surface rather closely and evenly punctate;
punctures as larg** as those of the pronotum, distatit by slightly more than
their own widths ; interspaces convex ; transverse carinae not cusped, finely
and strongly undulated posteriorly. Legs short and slender, femora piceous-
Idack above, dark fuscous beneath, tibiae dark fuscous, distal extremity and
tarsi very slightly paler, the latter slend(?r ; first joint of the posterior nearly
as long as the next two together, shorter than the last ; claws strongly cur-
vate, slender, abruptly enlarged at the base.

Mule. — Unknown.

Female. — Sixth ventral segment broadly rounded behind.

Length 2.9 mm.

White Fisli Point, Lake Superior, 4.

This species can be ilistinf»iiislied from Ilnhhardi and punctatiis by
its relatively miicli more robust form and smaller iiead. in addition
it differs from the first in its relatively shorter elytra, which are also
mncli more stronj^ly emarginate behind, and from the latter, in its
<lark legs and antennae, relatively shorter, more robust prutliorax,
and more convex elytra.

40. A. pertinax n. sp. — Fusiform, robust. Pubescence cinereous, short,
semi-erect, coarse, uniformly distributed, rather conspicuous. Head very
small, twice as wide as long ; interocular surface twice as wide as the eye,
very feebly convex ; punctures uniformly distributed, coarse, round, deeply
impressed, distant by less than their own widths ; interspaces narrow, con-
vex and polished ; sulcations almost obsolete; ocular lines meeting at about
one length in advance ; antennae much longer than the width of head, testa-
ceous, club very slightly darker ; third joint scarcely one-fourth longer than
the fourth ; maxillary palpi very long, piceo-testaceous, first joint paler, third
nearly as long as the first two together. Prothorax arcuately, evenly, and
rapidly increasing in width to the middle, where it is about as wide as long '
and but slightly narrower than the head ; sides thence feebly convergent
posteriorly and sinuate ; posterior angles prominent ; anterior margin slightly
shorter than the posterior, equally and distinctly arcuate ; surface trans-
versely and feebly impressed just behind the apex, otherwise evenly convex ;

i:>

I

|i*

19G

NO; ni AMKKICAN

punctunm Hinall, roiimltMl, riithcr olose, oucnRionally cunlcHcnnt on tlio flankH ;
iiitcrHpncutt IVoltly uoiivt'x, liit^lily {lolislii'd. Elytra iil bunt* iiioro tlian one-
fourth wider than th»i hcail ; wiih's jiarallttl, I'l'ijhly arcMiate, morn Htrongly
HO jiorttt'riorly, alxnit (-(lual in hHigtii to tho widtii al hano ; together hrondly,
angularly TvUiI sonii-wiiat Htrongly eniarginatu htdiind ; outer a]>i('al angles
aeiite ; suture ahdiit two-lifth.s longer than tlio jironotuni ; surlaco convex,
broadly and di.stincily impreMst-d on the suture at the base ; ininctures
HUiall, round, evenly <liHtributf(l, deeply impressed, dJHtant by about their
own widths; interspaces highly polished anil moderately convex. Ab
minal seginontfl ducreasing uniformly and rather ra])idly in width, llrst
slightly narrower than the contiguous t^lylra, cylindrical, slightly constricted
at base ; surface coarsely, very cdosely, and (evenly puuctulate, api)earing as
if perforated ; lateral border obsolete ; transverse carinae not cusped. Legs
short and slender, piceons-black above, slightly paler fuscous beiu-ath ; lirst
joint of the postiM'ior tarsi slightly longer than the next two together. Under
surface of the abdomen very closely, coarsely, and evenly punctate, appear-
ing as if perf(U-ated.

Mule, — Unknown.

Female. — Sixth ventral segment very obtusely rounded behind.

Length 3.2 nun.

Wyoming Territory, 1.

This species cun be readily identified by its very peculiar robust
fusiform shape, small head, and deep close punctuation on the under
surface of the abilonien.

If
1

■•I
'I

hi

41. A. lucidus n. sp. — Foini robust, convex. Pubescence excessively
sparse, short, and inconspicuous ; entire surface very highly polished. Head
small, robust, scarcely twice as wide as long ; interocular surface twice as
wide as the eye, very feebly convex, equally divided by the sulcations, which
are nearly obsolete ; intermediate surface evenly and distinctly convex ;
punctures small, distant, except in the suh^ations, where they are closely
crowded ; ocular lines meeting at nearly two lengths in advance ; antennae
short, scarcely longer than the width of head, slender, dark i)iceo-teataceous
throughout, club small ; third joint one-fourth longer than the fourth, fourth
and fifth equal in length, joints of club slightly elongated, last two equal
in thickness and more robust than the ninth ; maxillary palpi long, dark
piceous-brown, basal joint very slightly paler. Prothorax arcuately, evenly,
and rather rapidly increasing in width to a point very slightly in advance of
the middle, where it is about as wide as long ; sides thence rather less rapidly
convergent posteriorly and very feebly sinuate ; anterior margin very slightly
shorter and more arcuate than the posterior ; surface feebly impressed just
behind the anterior margin, otherwise evenly convex, finely punctate ; punc-
tures round, deeply impressed, rather close, somewhat unevenly distributed ;
a narrow fusiform space in the middle is impunctate. Elytra at base dis-
tinctly wider than the head ; sides very feebly divergent posteriorly, strongly
arcuate, more especially near the apices, about equal in length to the widtli
at base; together broadly, roundly, and rather strongly emarginate behind ;

i!

COLEOPTEnA.

107

mitnro ntmrly oiin-lialf IniiftiT than tin' pronntum ; unrfnoo v«»ry coiivvx,
rntlnT Mtroii^ly iiii|)n'HMi'<l on tlm Hiiturc toward tni« basn, «>ai!h elytron
ohliqiii'ly mill Hoiiii'wliat ffohly iniprt'HMHd in front of the middle; ])uiii'tnr<>!4
Hiiiall, round, di'i-ply inipri'ssi'(l, distant liy more flian ttn-ir own uidtliH,
iii'arly I'vcniy distrilpiilcd. Abdominal s('i,'nii'nts ilfcircasiiij^ nnifnnidy and
rntlier rapidly in wiiltli, flrwt tdifjlitly narrower than tin* contijjnoim elytra,
nearly eylindrical, each segment rather stron>,'ly constr' -'ed at Imito ; Kiirface
very coarsely, rather elusely and evi-nly pnnetnlate; > ctnres at hase na
larjje as those of the elytra ; Imrder olisnlete ; transverse . arinae not cusped.
Lega short and slender, femora anil tihiae l)la(^k, tarsi pnler, piceons ; lirst
three joints of tho jiosterior »;niformly and very rapiilly decreasing in loiigth ;
fonrth joints stron^jly hilohed, hdn-s narrow and very lonjj.

Miilf. — Unknown,

Fi'vidle. — Sixth ventral segment very obtusely and somewhat angularly
rounded hehind,

Len^'th 2.9 mm.

Oak Gr<)v«, California, 2.

Tlu! above-described type lias been lost; tbe second 8|)ecimen is
believed to represent tlie species, aUbong!; i; is more slender than the
original fy|)e. The species cannot, however, be very readily inis-
^ taken for any other of that region.

Unrecognized Species.

The following is the only species which I have not succeeded in
fully identifying. The original description of lioheman is transcribed
without alteration, except in the portions between brackets: —

[Areiis] clialybeus Boh.
Res. Engen. 1858, p. 33.

Caeruleus, nitidus, glaber; antennis palpis pedibusque dilute flavis,
illis antrorsum leviter infuscatis; fronte plana, punctata, medio cari-
nata ; prothorace confertim punctate, postice leviter carinato; elytris
prothorace nonnihil brevioribus, fortiter, crebre punctatis ; abdomine
immargiuato, coracino, parce subtiliterque punctulato. — Long. 4J,
lat. ^ millim.

Patria : California (St: Francisco).

Caput prothorace sesquilatiiia, obscure caeruleum, nitidum, crebre, sat
distincte punctatum, antice subtiliter albido-pubescens ; fronte plana, medio
linea longitudinali, laevi, modice elevata. Palpi dilute flavescentes. An-
tennae modioe elougatae, tenues, dilute Havae, extroraum leviter infuscatae,
articulo tertio quarto nonnihil longiore. Prothorax elytris fere duplo angus-
tior, ublongus, latitudine duplo longior, apice rotundatus, basi truncatus,

li "

198

NORTH AMERICAN

latoribus medio panim rotumlato-ampliatus ; suporiio convexua, caerulous,
nitidus, crebre, sat profinule punctatni:, dorso jiostico obsolete, longitudi-
iialiter carinatus. Souti'lluin v.>: ooiispicuuni. Klytra protliorace dui.lo
latiora et illo vix breviora, lateribus recta, apice truncata, superne leviter
convexa, oaerulea, iiitida, profiiudo, crebre punctata, hunierirt fere rectangu-
laribus, e'o' itis. Abdomen elytris aiignstiiis, immarginatnm, eloiigatnm,
cyliiidricmu, iiigro-caeruleiim, nitidum, . iibtilissime, crebrci punctuliftuui,
segmentis qixatuor primis coiistrictis. Pedes modice elongati, dilute llavi,
coxis anticis concoloribus ; tarsis longioriburi, articulo quarto profunde bilobo.

As tliis description is full, clear, iiiiil succinct, and does not corre-
poond witii any I'orm known from tiie Pacific Coast, even in its
general character, I am strongly inclined to believe that tiie locality
is erroneous, and consequently no number is attached, it being pre-
ferable to consider it at present as a doubtful species.

Total number of species described 172

Total number of specimens enumerated 1497

Number of species described from 5 or more specimens 70

Number described from 4 specimens 4

Number described from 3 specimens 7

Number described from 2 specimens 28

Number described from 1 specimen HS

Number not seen ; description transcribed 5

.-.i : K

COLEOPTEUA.

109

ruleus,
gitudi-
iiiij,!o
loviter
:tiuiga-
Ij.atum,
Ifftuni,
B llavi,
bilobo.

corre-
in its
)cality
g pre-

. *

■ 'ii. '

LIST OF SPECIES DESCRIBED.

SyXONYMV AM) ]}lULIOORAPHY.

Note. — Tli« names denoting tlie localitiea are indicative of regions, and
are self-explanatory.

DIANOUS.

1. D. nitldulua Lee— Proc. Cost. Soc. Nat. Hist. 1S74, xvi. p. 272.

Atlantic, Rocky Mts.

2. D. chalybeus Lee— New Sp. Col. L 1863, p. 49 Lakes.

3. D. zephyrus n. sp Pacilic.

STENUS.

A.

1. S. puuctlger n. sp. — (Fauvel i. litt.) Rocky Mts.

2. S. b'punctatus Kr. — Kiif. Mark. I. p. 530 Athintic, Lakes, Pacific.

comma Lee. — New Sp. Col. I. 18l!3, p. iiO.

3. S. oolon Say— Trans. Am. Phil. Soc. IV. p. 458. ..Atlantic, Cnilf, Lakes.

4. S. renifer Leo.— New Sp. Col. I. 1863, p. 50 Gulf, Arizona.

5. S. semicolon — 1. c. p. 50 Atlantic, Gulf, Lakes.

6. S. gemmeuB n. sp Atlantic.

7. S. bilentigatus n. sp Atlantic.

B.

At

8. S. sculptilis n. sp..., Pacific.

9. 8. laccophilus n. sp Lakes.

10. S. juno (Fal).)— Syst. El. IL p. 602 Atlantic, Gulf, Lakes, Pacific.

11. S. verticosus n. sp Pacific.

12. S. tristia n. sp Pacific.

13. S. Austin! n. sp Atlantic, Lakes, Pacific.

14. S. ranopa n. sp. Atlantic.

15. S. delavrarensia n. nn Atlantic.

16. S. sectator n. sp Pacific.

17. S. zunicua n. sp Arizona.

18. S. femoratUB Say — Trans. Am. Phil. Soc. IV. p. 459... Atlantic, Lakes.

19. &. tacomae n. sp Pacific.

20. S. strangulatUB n. sp. — (Fauvel 1. litt.) Atlantic, Lakes.

21. S. tenuis n. sp Lakes.

w

J-4

200 . NORTH AMERICAN

22. S. angUBtuB n. sp Atlantic, Lakes.

23. S. difflcilis 11. Hp.— (Sdiwaiz i. litt.) Atlantic, Lakes.

24. S. Pettiti n. sp Atlantic, Lakes.

2'). S. BoriipeuB n. sp Lakes.

20. S. intrusuB u. sp Atlantic, Lakes.

27. S. erythropuB Mels — Pioc. Ac. Pliil. H. p. 40 Atlantic, Lakes.

j'linci/tf's Mcls. — Cat. 1:?4.').

28. S. rugifer ii. sp. — (Faiivel i. litt.) Rocky Mts.

29. S. anaBtomozanB ii. sp. — (Crotch i. litt.; Atlantic.

30. S. BhoshoniB ii. sp Pacilic.

31. S. inBulariB n. sp Pacific.

32. S. vexatUB ii. sp Pacific.

33. S. Schwarzi n. sp. — (Pauvd i. litt.) Atlantic.

34. S. pauper n. sp Atlantic.

3"). S. BubtiliB 11. sp Lakes.

3G. a. indigenB n. sp Atlantic.

37. S. simplex n. sp. — (Crotch i. litt.) Pacific.

38. 3. vicinuB n. sp Atlantic, (iulf.

30. S. ingratuB n. sp Lakes.

40. S. neglectUB n. sp Atlantic, Lakes.

41. S. Bcabiosua n. sp Lakes.

42. S. vespertinus n. sp Pacific.

43. S. convictor n. sp Pacific.

44. S. deductor n. sp Lakes.

roiifiisits — This work, pp. 38 and ()3.

45. S. IhornatuB n. sp. — (Scliwar/. i. litt.) Atlantic, Lakes.

4(). S. placiduB n. sp Lakes.

47. S. mendaz n. sp Atlantic.

48. S. erienBiB n. sp Lakes.

41). S. sphaeropB n. sp Atlantic.

r)0. S. militaris n. sp Lakes.

.Ol. S. pluto n. sp Atlantic.

r)2. S. incultUB n. sp Arizona.

53. S. pterobrachys (f. ami 11 Pacific.

hrfripniiiis Milkl.— Hull. Mosc. 1852, II. p. 318.

54. S. corvus ii. sp. — (Schwarz i. litt.) Pacific.

55. S. maritimus Mots.— Hull. Mosc. 1845, IV. p. 35G Pacific.

5(5. S. montanuB n. sp. — (Schwarz i. litt.) Atlantic.

57. S. alpicola Fvl.— Faun. G.-Rli. III. p. 230 Kocky Mts., Pacific.

58. S. coBtallB 11. sp Pacific.

59. S. alveolatuB n. sp Pacific.

60. S. ellipticUB n. sp Pacific.

61. S. adelops n. sp Pacific.

62. S. luctuoBUB n. sp Pacific.

63. S. puaio n. sp. — (Schwarz i. litt.) Atlantic, Lakes.

64. S. nanuluB n. sp Pacific.

65. S. atomarlua n. sp ......Atlantic, Lakes.

it

'■'' !:

COLEOPTERA.

201

66. S. virginisB n. sp \tlantiu.

67. S. texanus n. sp Gulf.

68. S. venuBtUB n. sp Lakes?

6£>. S. occidentalla n. sp. — (Crotch i. litt.) Pacific.

70. S. pacificuB n. sp.— (Crotcli i. litt.) Pacific.

71. S. obstruBUB n. sp Atlantic.

72. S. arizonae n. sp. — (Crotcli i. litt.) Gulf, Arizona.

73. S. Integer n. sp Atlantic.

74. S. floridanuB n. sp Gulf.

75. S. colonus Krichs. — Gen. p. 699. ..Atlantic. Gulf, Laki^s, Arizona, Pacitic.

76. S. mammopB n. sp Atlantic, Lakes, Rocky Mts., Pacific.

77. S. graviduB n. sp Atlantic.

78. S. animatUB n. sj) Lakes.

79. S. tumicollis n. sp Lakes.

80. 3. carinicoUis n. sp Lakes.

81. S. insignia u. sp Pacific.

*

82. S. stygicus Say— Trans. Am, Phil. Soc. IV. p. 458 Atlantic, Gulf,

Lakes.

83. S. egenuB Erichs. — Gen. p. 698 Atlantic, Lakes.

84. S. doloBUB n. sp Rocky Mts.

85. S. villOBUS n. sp Pacific.

86. S. Bectilifer n. sp Atlantic.

87. S. milleporuB n. sp. — (Fauvel i. litt.) Atlantic, Gulf.

88. S. jejunus n. sp Pacific.

89. S. vinnulua u. sp Atlantic, Lakes.

90. S. congener Miikl.— Bull. Mosc. 1853, III. p. 192 Pacific.

91. S. canaliculatuB Gyll. — Ins. Huec. IV. p. 501 Atlantic, Lakes.

92. S. caroUnae u. sp Atlantic, Gulf.

93. S. ageus n. sp *. Atlantic.

94. S. pudicuB n. sp Lakes.

9.''). S. minor n. sp Lakes.

96. S. rigidus n. sp Atlantic-

97. S. incertUB n. sp Lakes, Rocky Mts.

98. S. parallelus n. sp. — (Schwarz i. litt.) Atlantic.

99. S. noctivagua u. sp Atlantic.

100. S. luculentua n. sp Pacific.

101. S. juvencUB n. sp Lakes.

102. S. pauperculua n. sp Lakes?

103. S. hapluB n. sp Lakes.

104. S. enodia n. sp Rooky Mts.

202

NORTH AMERICAN

105. S. dives n. sp Pacific.

10(5. S. Bubgriseua n. sp. — (Scliwarz i. litt.) Pacific.

107. S. terricola n. sp Pacific.

108. S. mundulUB n. sp Pacific.

10!1. S. tuberculatus n. sp Oiilf.

110. S. indistinctus n. sp. — (Bcliwaiz i. litt.) Lakes.

111. S. brumalis n. sp Lakes.

C.

112. S. gratioBUB n. sp Lakes.

113. S. monticola ii. sp Atlantic.

114. S. curtus n. sp Lakes.

115. S. alacer n. sp Lakes, Gulf, Arizona, Rocky Mts.

116. S. hirsutUB n. sp Lakes.

117. S. vestaliB n. sp Pacific.

118. S. tahoensia n. sp Pacific.

119. S. nimboBUB n. sp. — (Fauvel i. litt.) Rocky Mts.

120. S. pugetenais n. sp Pacific.

121. S. vacuuB a. sp Pacific.

122. S. amicus n. sp Rocky Mts.

123. S. exilia n. sp Pacific.

124. S. califomious u. sp Pacific.

Subgen. MutinuB.

125. S. (M.) gilae n. sp Arizona.

12(3. S. (,M.) dispar n. sp Atlantic, Uulf, Rocky Mts.

chalceus FvL i. litt.

Unrecognized Species.

127. S. adspector Makl.— Bull. Mosc.1852, IL p. 316 Sitklia.

128. S. parallelopipedus Mots. — 1. c. p. 317 Sitklia.

129. S, cariniceps Milkl.— 1. c. p. 317 Sitklia.

130. S. immarginatua Miikl.— Bull. Mosu. 1853, IIL p. 192 Alaska.

AREUS.

1. A. retruaus n. sp Pacific.

2. A. fraternuB n. sp Lakes, Rocky Mts.

3. A. umbratiliB n. sp Pacific.

4. A. croceatus n. sp. — (Fauvel i. litt.) Atlantic, Lakes.

5. A. advena n. sp ; Lakes.

6. A. europs n. sp Atlantic.

COLEOPTERA.

203

7. A. megalops n. sp Gulf.

8. A. lugena n. sp Atliintie.

9. A. plicipennlB n. sp. — (Schwarz i. litt.) Pacific.

10. A. agnatUB n. sp Pacific.

11. A. Sayl u. sp Pacific.

12. A. amabilis ii. sp Atlantic.

13. A. flavicornls (Krichs.) — (leii. p. 7'?.? Atlantic, Lake:..

i/fiiinil(iliis Say — Trans. Am. Phil. Soc. IV. p. 458.

14. A. annularis (Kiichs.) — (len. p. 73,') Atlantic, Lakos.

15. A. perforatuB n. sp Arizona.

IG. A. nitescenB n. sp CmU.

17. A. pollenB n. sp Pacific.

18. A. patens n. sp Hocky Mts.

19. A. reconditus n. sp Atlantic, Lakes.

20. A. propinquus n. sp Atlantic.

21. A. canadensis n. sp Lakes.

22. A. pinguis n. sp Pacific.

23. A. utenis n. sp Kocky Mts.

24. A. trajectus n. sp Ivocky Mts.

25. A. papagonis n. sp Arizona.

26. A. obsoletus n. sp Lakes.

27. A. artus n. sj) Atlantic.

28. A. dilutUB n. sp Gulf.

29. A. meridionalis n. sp. — (Scliwarz i. litt.) Gulf.

30. A. callosus (Krichs.) — Gen. p. 737 Atlantic, Gulf.

31. A. varipes n. sp Lakes.

32. A. arculus (Kriclis.) — (iren. p. 744 Atlantic, Jiakes.

33. A. punctatUB (Ericlis.) — Gen. p. 744 Atlantic, Lakes.

34. A. dissentiens n. sp Lakes.

35. A. Hubbardi n. sp Lakes.

36. A. laetulus n. sp Pacific.

37. A, leviceps n. sp Pacific.

38. A. politulus n. sp Pacific.

39. A. simiclus u. sp Lakes.

40. A. pertinaz n. sp Rocky Mts.

41. A. lucidus n. sp Pacific.

Unrecognized Species,
? A. chalybeus Boh. — Res. Eugen. 1858, p. 33 California.

In considering geographical distribution in the following table the
only regions taken into account are those of the Lakes, the Atlantic,
and the Pacific, not only because they are the only ones which are at
all thoroughly explored, but on account of their continuity along the

! :!;

204 NORTH AMERICAN >

same latitude thoy are likely to give the most \iseful result. We have,
tlieret'ore, not counting tlie unrecognized species: —

Peculiar to tlie Atlantic Kegion 82

Peculiar to the Lake Region 33

Peculiar to the P.icilic Kegion .">0

Common to the Atlantic and Luke Regions only 24

Common to the Lake and Pacilic Hegions only 0

Common to the Atlantic, Lake, and Pacific Regions. . . 5

A few species peculiar to the Gulf, Rocky Mts., or Arizona faunas
are omitted, and if included would not tend to render the table more
significant. It should be mentioned, however, that there are three
species peculiar to the Lakes and Rocky Mts. only. It is also to be
observed that the Rocky Mts. constitute an almost insuperable barrier
to the intercommunication of the various species, only five being
common to the two slopes.

I"

ERRATA.

Page 1(5, 1st line after descrii ion, /oc " Peiiinjiton" read " Pennington." '
" 29, 1] til lino from top, /or "several" rem/ "sexual."
" 47, Ifit line from top, /;<r " Firsh" read " Fish."

" 38 and p. fi3,./or " coiiflisiis" rend "deductor," cod/hsus is pre-
occupied (Salill). En. Col. hracli. Fenn. 1870, p. 58).

:it

COLEOl'TKUA.

205

EXPLANATION OF THE PLATE.

Fig. 1. Maxilla and maxillary palpus of Stmus Juno (Fab.) % , takoii near
Canibridgi:, MaH.sadiusett.s. Tlio tenniiuil spiiio of tlic tliird palpal
joint is not represonted, as it was entirely invisible in the original.
The triangular area to tliH left is the exposed surface seen when
in position to the left of the nientuni ; the inner lobe is strongly
declivoua just to the right of this triangle ui order to allow the
lobe to extend under the labium.

Fig. 2. Maxilla and maxillary palpus of Areus annnlnris (Erichs.; 9- -^t
the end of the outer lobe is to be seen a thin prolongation, along
the apex of which the setae are irregularly and arcuately bristling.
This prolongation, which forms the principal distinctive feature
in the maxilla of the present species and tliat of ^teniis Juno, is
of very peculiar formation, being an aggregation of parallel fibres
compactly agglutinated, and resembling alnu)8t exactly a piece of
fibrous gypsum, or of some varieties of ixsbestos. Among other
dill'erenceSi may be noted the very much longer setae along the
outer edge of the outer lobe ; they are also much less numerous.

Fig. 3. Labial palpus of Areus unnularifi J . In the position in which it is
ligured, the spinous thiri' joint is not seen, but the view is that
which best enables observation of the concavity in the second joint.

Fig. 4. Labium of Stemts Jinio 9 , Cambridge, Massachusetts. The terminal
portions of the pariiglossae are whiter, and of a granular gelatinous
texture, tlio ligula being yellowish-testaceous ; the line of le-
marcation between these portions is very distinct. The narrow

,. medial carina of the ligula is to be noted. The labial palpi are

attached to minute tuberculations at the anterior edge of the ligula.

Fig. 5. Right mandible of Areus annularis 9 viewed internally. In this
position the full curvature of the mandible is not seen, as the
point of sight is nearly in the plane of the curve.

Fig. 6. Mentum of Stenus Juno 9 as viewed detached from the submentum ;

the narrow transverse area bordering it posteriorly is testaceous in

, color, and serves to form the joint at tl:e submentum ; it projects

from below tho exposed surface. The narrow carinal ridge is

extremely strong, and the surface of the mentum is most strongly

impressed near the lateral apical angles. The carina terminates

■ anteriorly in a minute triangular extension of tlie anterior margin,

■, J ' which is very slightly reflexed. The apical angles project as very

minute points in this species. ,

I . •

206 NORTH AMERICAN COlEOPTEnA. t~

Fig. 7. Labrum of Stenus juno 9 vii'wod on its luuler surface ; it is most
strongly im])rt'8s<i(l in tlio niiddlo and nt^ar tlin posterior sinuosity ;
till) stnuttiirc is cellulnr, <'si)t'c-iall\ near the lateral postiirior
itUgU'S. Thy slight bilohntion ohsorved in the anterior edge is
not to be seen distinctly wLon viewed in its natural position.

Fig. 8. Antenna of S. sciilptilis.

Fig. 0. Antenna of 5. (Mutiniis) dispar.

Fig. ]0. Tarsal claw of ^rei(s po//e)i».

Fig. 11. Tarsal claw of A. recoiiditiis.

Fig. 12. Tarsal claw of A. propinqmm.

Fig. 13. Tarsal claw of A. canadensis. ,

Fig. 14. Tarsal law of A. pinguis.

Fig. 15. Tarsal c 'vw of A. utenis.

Fig. iCi. Tarsal claw of A. trajectus.

Fig. 17. Tarsal claw of A. papagonis.

Fig. 18. Tarsal claw of A. tarsalis Ljungh, taken from a European specimen.

1 1 ■■'

l! -i

PubliBhed, November, 1884.

H k

Philadelphia :
Collins Pkinting House,
705 JayDe Street.

t 19 most
inuosity ;
posterior
■ t!<lge is
'iou.

cimen.

NnRTH Amemican Stenini.

n^

(E