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FAUNA HAWAIIENSIS

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FAUNA HAWAIIENSIS

BEING THE LAND-FAUNA OF THE
HAWAHAN ISLANDS

VOLUME

BY VARIOUS AUTHORS

1 901 — 191

PUBLISHED IN SIX PARTS
EACH WITH A SEPARATE TITLE-PAGE

CAMBRIDGE
AT THE UNIVERSITY PRESS

1913

CambriUqe :

PRINTED BY JOHN CLAY, M.A.
AT THE UNIVERSITY PRESS.

FAUNA HAWAIIENSIS

VOL. III. PART V.

COLEOPTERA, III.

D. Sharp

AND

Hugh Scott

Price Thirty Shillings.
To Subscribers Fifteen Shillings.

The Fauna Hawaiiensis is being published in parts at irregular inter-
vals, and will it is hoped be completed in three Volumes.

Contributions have been made or

W. H. ASHMEAD ..•

G. H. Carpenter ...

Prof. FiLIPPO SiLVESTRI .

F. E. Beddard, F.R.S. ,

M. A. DOLLFUS

Prof. AUGUSTE FOREL

p. H. Grimshaw, F.E.S.

G. W, KiRKALDY, F.E.S.

E. Meyrick, F.Z.S.
Hugh Scott, B.A.

R. C. L. Perkins, D.Sc.

D. Sharp, F.R.S

A. E, Shipley, M.A.

M. EuG. Simon

The Rev. T. R. R. Stebbing, F.R.S.

E. R. Sykes, F.Z.S

The Lord Walsingham, F.R.S.

promised by the following, viz.

Hymenoptera Parasitica,

Collembola.

Thysanura and Myriopoda.

Earthworms,

Isopod Crustacea.

Formicidae.

Diptera.

Hemiptera.

Macrolepidoptera .

Part of Coleoptera.

' Vertebrata, Hymenoptera Aculeata,
Orthoptera, Neuroptera, and part of
Coleoptera,

Part of Coleoptera.

Parasitic Worms,

Arachnida.

Amphipod Crustacea,

Mollusca.

Microlepidoptera,

N.B. The parts of the three Volumes are being published concurrently in order
to expedite the completion of the work.

The price of each part will vary according to its extent and the number of Plates.
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COLEOPTERA

CLERIDAE TO HYDROPHILIDAE
By D. sharp and HUGH SCOTT

FAUNA HAWAIIENSIS

OR THE

ZOOLOGY OF THE SANDWICH (HAWAIIAN) ISLES

Being Results of the Explorations instituted by the Joint Committee

appointed by

THE ROYAL SOCIETY OF LONDON FOR PROMOTING NATURAL KNOWLEDGE
AND THE BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE

And carried on with the assistance of those Bodies and of the Trustees of

THE BERNICE PAUAHI BISHOP MUSEUM AT HONOLULU.

EDITED BY

DAVID SHARP, M.B., MA., F.R.S.

SECRETARY OF THE COMMITTEE.

VOLUME 111. PART V.

COLEOPTERA. III.
By D. sharp and HUGH SCOTT.

Pages 367 — 579; Plates XIII — XVI, uncoloured.

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1908

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367

COLEOPTERA.

IV. COLEOPTERA (VARIOUS).

By D. Sharp and Hugh Scott\

Fam. CLERIDAE.

Tarsostenus Spinola.
Tarsostenus Spinola, Mon. Cleridae, i. 1844, p. 287.

(i) Tarsostenus univittatus Rossi.

Tarsostenus univittatus Rossi, Faun. Etr. Mant !• p. 44.

This introduced species holds its place near Honolulu, but apparently does not
extend its range.

Hab. Oahu : N.W. Koolau range vii. 1901 ; Waialua coast, v. 1901 (Perkins).

Necrobia Latreille.
Necrobia Latreille, Pr^c. Car. gen. Ins. 1796, p. 35.

(i) Necrobia rufipes Fabricius.

Necrobia rufipes Fabricius, Spec. Ins. i. p. 65.

This and the following species are now nearly cosmopolitan.

Hab. Kauai, Oahu, Maui, Lanai, Hawaii.

(2) Necrobia ruficollis Fabricius.
Necrobia ruficollis Fabricius, Syst. ent. p. 57.
Hab. Kauai, Oahu, Maui, Lanai, Hawaii.

^ A large portion of this part was completed some years ago, but was put aside owing to my being
unable to find time for the remainder. About a year ago I was so fortunate as to obtain the assistance
of Mr Hugh Scott, to whom is due much of the concluding portion of this part Mr Scott's actual
contributions are distinguished by his name or initials being added. I have, however, to thank him for
much assistance in preparing my own portions for press. D, S.

F. H. III. 48

368 FAUNA HAWAIIENSIS

Fam. MALACODERMIDAE.

The two Insects of this family discovered by Mr Blackburn thirty years ago
apparently hold their own at Honolulu, where both have recently been found by
Mr Perkins. I suppose both of them to have been introduced, but they have not yet
been found elsewhere, and it is within the bounds of possibility that they may have
formed part of an old precinctive lowland Fauna now nearly extinct.

Helcogaster Boheman,
Helcogaster Boheman, Res. Eugen. 1858, p. 81.

(i) Helcogaster pectinahis Sharp.
Helcogaster pectinatus Sharp, Tr. Dublin Soc. in. 1885, p. 157, PI. IV. fig. 20.
Hab. Oahu, Honolulu (Blackburn, Perkins). Occurs in numbers occasionally ;
about houses (Perkins).

Caccodes Sharp.
Caccodes Sharp, Tr. Dublin Soc. in. 1885, p, 157.

(i) Caccodes debilis Sharp.
Caccodes debilis Sharp, Tr. Dublin Soc. iii. 1885, p. 157.

Hab. Oahu, Honolulu, scarce. Found in houses (Blackburn), but also found
away from houses in planted forest (Perkins).

Fam. ELATERIDAE.

Adelocera Latreille.
Adelocera Latreille, Regn. anim. 11. 1829, p. 401.

(i) Adelocera modesta^ Boisduval.
Agrypnus 7nodestus Boisduval, Voy. Astrolabe, Col. p. 108.
Hab, Oahu (Blackburn, Perkins). Polynesia.

Chalcolepidius Eschscholtz.
Chalcolepidius Eschscholtz, Thon Arch. 11. 1829, p. 33.

(i) Chalcolepidius erythroloma Gand^ze.

Chalcolepidius erythroloma Candeze, Mon. Elat. i. p. 282. C albertisi Candeze,
Bull. Soc. ent. Belgique, 1878, p. 55,

COLEOPTERA 369

This fine Insect is apparently not very rare near Honolulu, but scarcely increases
its range.

Hab. Oahu (Blackburn, Perkins), Chili and Ecuador.

[IscHioDONTUS Caudeze.

Ischiodontus Candeze, Mon. Elater. 11. 1859, p. 90.

Ischiodontus hawaiiensis Candeze, Elater. nouveaux, fasc. 3, 188 1, p. 42.

So far as we know, there is no Ischiodontus in the Sandwich Islands. From infor-
mation received from Mr Gahan of the British Museum of Natural History, it appears
certain that the insects in the Fry Collection, which Candeze described as /, hazvaii-
ensis, were wrongly labelled as coming from the Sandwich Islands, the real locality
being the Samoa Islands.]

SiMODACTYLUS Caudezc.
Simodactylus Candeze, Mon. Elater. 11. 1859, p. 169.

(i) Simodactylus cinnamomeus Boisduval.
Aeolus cinnamomeus Boisduval, Voy. Astrolabe, CoL p. 106.

Hab. Kauai, Oahu, Hawaii. — Kauai, Lihue, vii. 1896 (Perkins). — Oahu; (Black-
burn), Kaala mts. (Perkins).^ — Hawaii, Kona, 1500 ft. vii. 1892 (Perkins).

MoNOCREPiDius Eschscholtz.
Monocrepidius Eschscholtz, Thon Arch. 1829, 11. i, p. '^i,

(i) Monocrepidius exsul Sharp.

Monocrepidius exsttl Sh?ir^, Ann. Nat. Hist. (4) xix. 1877, p. 470.

This species has recently been introduced into the Hawaiian Islands. I have only
one individual before me, and it differs a little from the New Zealand type in sculpture,
and in the form of the sides of the thorax and of the apices of the elytra, but these
differences scarcely go beyond the limits of variation. M. exsul is also, I believe, an
introduction in the fauna of New Zealand, its native country being perhaps Australia.

Hab. Oahu (Koebele).

Melanoxanthus Eschscholtz.
Melanoxanthus Eschscholtz, Silb. Rev. iv. 1836, tabula.

(i) Melanoxanthus melanocephalus Thunberg.
Elater melanocephalus Thunberg, Nov. Ins, spec. iii. 1784, p. 63.
Hab. Oahu: Honolulu (Blackburn, Perkins); Waianae Mts. 1700 ft. iv. 1892
(Perkins).

48—2

370 FAUNA HAWAIIENSIS

EoPENTHEs Sharp.

Eopenthes Sharp, Tn Dublin Soc. iii. 1885, p. 153,

This genus, though very closely allied to Megapentkes, had better be kept distinct.
The characters are as follows. Front of head but little produced in the middle, feebly
margined, closely approximate to the front margin of the epistome, but separated from
it by a definite space. Trochanteral notch of the coxal cavity broad and very definite,
usually projecting on each side as a sharp angle or spine. Antennae with second and
third joints subequal ; in the female about as long as the thorax, in the male about one-
third or one-fourth longer. Elytra usually more or less spinose at tips.

North American species of Elater such as E, carbonicolor Eschscholtz appear on
the whole to be the nearest allies, but as closely-allied forms are found all over the
world, this is not of much importance.

The species are very difficult to distinguish, but perhaps the following table may
prove of some assistance.

a. Colour metallic , Species i and 2

a! . Colour not metallic.

b. Prosternal process not bent upwards behind the front coxae Species 3 — 5

b\ Prosternal process bent upwards behind the front coxae.

c. Tarsi notably thickened, fourth joint of hind feet not minute.

iL Prosternal process before the apex projecting as a sharp denticle ...Species 6 — 28

d\ Prosternal process before the apex not denticular Species 29

c\ Tarsi thickened, fourth joint of hind feet minute Species 30 — 2i2>

(i) Eopenthes caeruleus^ sp. nov.

Gracilis, caeruleus, nitidus, femoribus rufis, tibiis, tarsis antennisque nigris. Long.
8| — 9^ mm.

Narrow, of a beautiful blue colour, shining, with a scanty, rather long, black
pubescence. The head and thorax are rather coarsely but not densely punctured, very
shining ; the thorax elongate and narrow, the posterior angles markedly divergent.
Elytra deeply striate, but the striae posteriorly are evanescent ; the apices rather
strongly spinose. Tarsi elongate, the anterior and middle pairs distinctly incrassate.

Van molokaiensis ; paulo latior, subtilius punctata.

The species is so distinct by its colour that it is not necessary to discuss it. The
series of about 20 specimens from Lanai vary but little. The 4 specimens from Molokai
are slightly different but are not, I think, another species.

Hab. Lanai, Molokai.— Lanai : Halepaakai, vii. 1894; Lanaihale, vil and viii.
1894; Mts. Koele, 3000 ft. vii. 1894. — Molokai: Kalawao, viii. 1893 (Perkins).

COLEOPTERA 371

(2) Eopenthes auratus, sp. no v.

Auratus, nitidus, femoribus rufis, antennis, tibiis tarsisque nigris. Long. io| mm.

This scarcely differs from E. caeruletis, except in the golden brassy colour and the
slightly broader form, so that the thorax appears more narrowed towards the front. The
series of E. caeruleus is very constant in colour, so that I think auj-attis will prove
distinct.

Hab. Molokai, 4000 ft. vl 1896 (Perkins).

(3) Eopenthes basalts Sharp.

$ Eopenthes basalis Sharp, Tr. Dublin Soc. in. 1885, p. 153.

E, basalis ex parte, Blackburn, t. c. bottom of p. 155.

Plate XIII. fig. 7, $.

This fiine species is readily distinguished by the strongly acuminate and sharply
spinose apices of the elytra, as well as by the form of the prosternal process (Plate XIII.
fig. 10). In both these characters it is approached by E. koebelei. There is a distinct
incrassation of the base of the front tarsi. My original description was made from
a rather small female. I have now both sexes before me. They differ comparatively
little, the antennae of the male being less elongate than usual, and extending very little
beyond the angles of the thorax ; it has the thorax coarsely and very densely punctured,
and the 2nd and 3rd joints of the antennae rather shorter than they are in the female.
The species is apparently very rare.

The remarks made by Blackburn (t. c. p. 155) about E, basalis refer really to
E. obscurus $.

Hab. Oahu, Honolulu (Blackburn, Perkins); N.W. Koolau range; Mts. near
Honolulu, 2000 — 3000 ft. (Perkins).

(4) Eopenthes longicollis, sp. nov.

^ Nigerrimus, hand nitidus, pube pallida ac brevi vestitus, fortiter sculpturatus ;
elytrorum apicibus spinosis. Long. loj mm.

A remarkably distinct species, of elongate form, with very dense sculpture ; the
punctures on the thorax are large and are crowded as closely as can be ; the striation
of the elytra is remarkably deep, and the apices are more conspicuously spinose
than in any other species except E. basalis : the antennae are largely developed and
elongate : the prosternal' process is to a certain extent an approximation to that of
E. basalis, but is really very little different from that of the ordinary species of the
genus except that it is rather less bent up behind the coxae, and the denticle is larger.
The species seems to connect the very distinct E. caeruletts with basalis and koebelei.

372 FAUNA HAWAIIENSIS

We have only two specimens, they are both males, but a specimen in the collection at
the British Museum is a female, and has the antennae considerably shorter.

Hab. Kauai: Makaweli and Lihue, 2000 — 3000 ft. vl 1894 (Perkins) ; Mountains
of Kauai (Rev. Harper Pease, in Brit. Mus.).

(5) Eopenthes humeralis Karsch.

E later humeralis Karsch, Berlin, ent. Zeitschr. xxv. 188 1, p. 5, PI. I. fig. 7.

?. Niger, elytrorum basi late flava ; prothorace dense punctato. Long. 13^,
lat 3^ mm.

This species cannot be confounded with any other, except possibly E, basalts, or
large female E, obscurus. From E. basalts it is distinguished by the less attenuate
apices of the elytra, by the black antennae, the basal joints not being paler than the
others : and from E. obscurus by the more spinose apices of the elytra and by the
prosternal process not being bent upwards behind the coxae.

I describe the species from a single female given me by^Mr Koebele. Mr Perkins
found a specimen of the male sex dead and entirely deprived of its antennae as well as
of most of its legs. It has the thorax much more slender than that of the female (as is
usually the case in Eopenthes), but in other respects agrees very well.

Hab. Maui (Koebele); Olinda (Dr Finsch) ; Haleakala, 3000 ft. viii. 1894
(Perkins).

(6) Eopenthes obscurus Sharp.

$. Eopenthes obscurus Sharp, Tr. Dublin Soc. iii. 1885, p. 154, PI. IV. fig. 19.

E, basalts ex parte, Blackburn, t.c. bottom of p. 155.

$ Gracilis, fusco-niger, elytris summa basi flavescente, pedibus fuscis ; prothorace
dense ac fortiter punctato ; corpore minus tenuiter pallido-pubescente. Long. 7^ —
12 mm., lat. 2 — 3^ mm.

The species was described by me from a single female. The two sexes are
extremely different, the male being a comparatively small and slender insect, with
elongate antennae, and the pale colour of the elytra confined to a short area at the
anterior declivity. Although the elytra in this sex are narrow at the tips — not broad as
in the female — and form a sharp angle there, they cannot be called spinose.

The remarks made by Blackburn (t.c. p. 155) about E, basalts have reference really
to E. obscurus $.

Hab. Oahu, near Honolulu (Perkins).

The species is well known from Oahu. We also have 5 specimens with the
number 210, which refers to Kona on Hawaii. One of these specimens is however
marked on the margins, ** Oahu mts. 2000 ft. /97. K." I feel sure that the entry as to
No. 210 is incorrect and that the species is confined to Oahu. Cf. remark under
E, divisus.

COLEOPTERA

zn

(7) Eopenthes kauaiensis, sp. nov.

?. Niger, sat nitidus, pallido-pubescens, elytrorum basi interdum rufescente,
antennis fusco-rufis, pedibus rufis, tarsis fuscis ; prothorace crebre fortiter punctato ;
elytris apicibus attenuatis, subspinosis. Long. 1 1 mm., lat 3 mm.

Of this form we have only two rather discrepant females ; it is not very near any
species known from Kauai, and is apparently nearest to E, konae found at the other
extremity of the Archipelago ; it is rather larger and more robust, and has the thorax
rather more coarsely and sparingly punctured ; the front feet have a larger development
of the fine clothing on their under surface ; the elytra are, in one specimen, differently
coloured ; and they have the apices more spinose.

Hab. Kauai. High plateau, viii. 1896; 4000 ft. vii. 1896 (Perkins).

(8) Eopenthes germanus, sp. nov.

$. Fuscus, elytrorum basi vage rufescente, antennis pedibusque sordide rufis ;
prothorace elongato, crebre sat fortiter punctato ; elytris apicem versus attenuatis, hand
spinosis. Long. 1 3, lat. 3! mm.

A single specimen is very closely allied to E. obscurus, but differs in so many
points that I must treat it as a different species. It is rather more elongate in form,
with the elytra more attenuate posteriorly, the pubescence of the upper surface is
shorter, finer and more scanty, the punctuation of the thorax is less dense and coarse,
and the antennae are longer, with a longer third joint than in any other species ; the
thorax is considerably longer, and more narrowed in front than it is in the female of
E. ob scums.

Hab. Oahu, near Honolulu (No. 786 Perkins).

(9) Eopenthes pallipes, sp, nov.

?. Niger, nigro-pubescens, antennis pedibusque testaceis ; prothorace lateribus
subparallelis, parce punctato ; tarsis gracilibus. Long. 8^, lat. vix 2\ mm.

We have only one example of this species, and it is extremely close to the
corresponding sex of E, cognattis, so that the validity of the species is somewhat
doubtful : it has however the tarsi quite simple and slender, without any dilatation of
the basal joint ; the antennae are more slender, and slightly longer, and the thorax
is rather more parallel-sided ; the colour of the legs is pale yellow, even the tarsi are
quite yellow. The elytra are attenuate towards the tip and distinctly spinose.

Hab. Oahu, viii. 1900 (Perkins).

(10) Eopenthes politus, sp. nov.

$• Minus gracilis, nigerrimus, nitidus, antennis fusco-rufis, basi pedibusque rufo-
testaceis ; thorace parce subtiliterque punctato. Long. 8^, lat. 2^ mm.

374 FAUNA HAWAIIENSIS

Though we have only one specimen of this species it appears to be so distinct that
I give it a name without reluctance. It is the most shining of the genus, and has the
thorax most sparingly and finely punctured. It is very distinct from E. mauiensis ?,
having shorter legs and antennae besides the distinctions in form and sculpture. The
elytra are not spinose at the tips, there is no trace of any dilatation of the tarsi, the
prosternal process is strongly tuberculate, and the punctuation of the ventral segments
is very sparing and obsolete.

Hab. Maui, Haleakala, 5000 ft. vi. 1896 (Perkins).

(11) Eopenthes deceptor, sp. nov.

$. Nigerrimus, nitidus, pedibus flavis, tarsis fuscis ; prothorace minus dense fere
subtiliter punctato ; elytris profunde striatis. Long. 8^ mm.

I describe this on a single female specimen. It is easily distinguished from
E. variansj when that species has a similar coloration, by the more elongate form, and
the less incrassated tarsi. It is most like E. pallipeSy but is more shining, with a rather
narrower thorax, and slightly thicker tarsi. The unique individual is not very well
preserved ; the pubescence is short and scanty, differing markedly from that of
E, varians.

Hab. Molokai, above Pelekunu, vii. 1893 (Perkins).

(12) Eopenthes per kinsi, sp. nov.

Niger, thorace elytrisque rufis, sutura nigricante ; thorace dense fortiter punctato;
elytris profunde striatis, apicibus parum acuminatis. Long. 10 — 13 mm., lat. 2\ — 3|^mm.

Variat ; antennarum, pedum, elytrorum, abdominisque colore nigro plus minusve
desinente.

The male is much smaller than the female, and has longer, more highly-developed
antennae and a denser punctuation of the thorax.

The markedly red colour of thorax and elytra and the black suture of the latter
make this species recognisable at a glance.

The pubescence is pallid, but as it is shorter and finer than usual it is but little
conspicuous. The hind angles in the male are but little directed outwards ; in the
female not at all. There is a slight dilatation of the three basal joints of the tarsi ;
the angle on the prosternal process is abrupt and well-marked, but does not project
as a denticle or tubercle.

Hab. Oahu. Near Honolulu on several occasions; 2000 — 3000 ft. on one
occasion (Perkins).

(13) Eopenthes divisus, sp. nov.
Niger, femoribus flavis, elytris dimidio basali pallido, tibiis vel flavis vel fusco-flavis ;
prothorace fortiter ac crebrius punctato. Long, t 7 — 7f mm., ? 8 — 10 mm.

COLEOPTERA 375

Readily recognisable by the coarse punctuation of the intensely black thorax,
which is nevertheless shining, by the divided coloration of the elytra, and the brightly
flavescent femora. In these characters it is approached by some of the varieties of
E, varians, but that species has a marked dilatation of the tarsi, which is not the case
in E. divisus, moreover the pallid colour of the base of the elytra is remarkably pale in
E. divistis. The shape is rather peculiar, the insect being somewhat -broad in the
middle and much narrowed behind, so that the interstices of the elytra are broad in
front but at the tip are very narrow : the actual tips are distincdy spinose. There is a
slight dilatation of the base of the anterior tarsi, but not of the other two pairs.

Hab. Oahu, Honolulu, 2000 ft. in 1896 (Perkins).

Certain of the specimens are numbered 210, which refers to Kona in Hawaii.
I feel convinced that this is erroneous, and that the species is really confined to the
mountains of Oahu. Cf. remark under E, obscurus. Mr Perkins remembers finding
this insect in Oahu.

(14) Eopenthes konae Blackburn.
Eopenthes konae Blackburn, Tr. Dublin Soc. iii. 1885, p. 154.

We have a very large series of about 300 specimens of this species, which is very
variable. In colour it passes from entirely black to light brown. The thorax is a good
deal narrowed in front, the sides having usually a slightly concave curve. There is
much pubescence on the thorax, usually of a pallid colour. The thorax is rather
closely punctate but shining. The elytra are distinctly dehiscent at the tips, and
minutely spinose. The length varies from 7^ — 11^ mm. The male has the antennae
rather longer than the female, about 2 joints extending beyond the hind angles of the
thorax, while in the female they extend scarcely at all beyond the hind angle ; the length
in a moderate sized t is about \\ mm. There is a very slight development of the fine
pubescence on the under surface of the basal three joints of the feet, and an extremely
slight incrassation of these joints : the 4th joint of the hind foot is 2 or 3 times as long
as it is broad.

Hab. Hawaii : Kilauea, on several occasions ; Kona, 3000 — 5000 ft. on several
occasions; Olaa on several occasions ; Mauna Loa, 4000 ft. vii. 1892 (Perkins) ; Kona,
5000 ft (Blackburn).

(15) Eopenthes cognatus, sp. nov.

Augustus, nigerrimus, nitidus, parce pubescens, pedibus flavis, tarsis tibiisque
interdum fuscis ; antennis vel flavis subfuscentibus, vel nigris basi fusco-flava ; prothorace
nitido, parce punctato ; elytris subtiliter striatis. Long. 8, lat. 2 mm.

Narrower than E. konae, with the thorax more sparingly punctate, and the
pubescence of the upper surface much less developed. The pubescence is black, so

F. H. III. 49

Z1^ FAUNA HAWAIIENSIS

that it is concolorous with the surface. The legs of E, konae are never coloured like
those of E. cognatus. Somewhat doubtfully distinct.

Hab. Hawaii: Kona, 3000ft. vi. 1892; Kilauea, vil 1895; Olaa, vi. 1895 and
IX. 1896 (Perkins).

(16) Eopenthes celattts, sp. no v.

Rufescens, capite, thorace, corpore subtus antennisque nigricantibus ; pube pallida
conspicue vestitus ; prothorace sat crebre punctato ; elytris apicibus haud spinosis ;
antennis pedibusque elongatis. Long. 9 mm.

We have only two individuals — males — of this species : it appears to be most like
E. konae, but the elytra are not spinose at the tip, and the antennae and tarsi are rather
more elongate. Except for slight and unimportant differences in colour etc. it agrees
in most other respects with E. konae.

Hab. Molokai, Kalawao, 8. viii, 1893 (Perkins).

(17) Eopenthes gracilis, sp. nov.

Augustus, nigerrimus, nitidus, nigro-pubescens, femoribus rufis ; prothorace nitido,
disco parce punctato. Long. 9^, lat. 2 mm.

Extremely close to E. konae, but distinguished from all the varieties of that species
by the more slender form, and the scanty punctuation of the middle of the thorax. It
is of an intense black colour, and shining ; the thorax has the sides moderately divergent
behind, very little sinuate, the scanty pubescence detracting but little from the shining
and intensely black appearance of the surface. The antennae of the male are slightly
broader and longer than those of the male E. konae. The reddish yellow femora
contrast strongly with the quite black tibiae. The under surface is rather more finely
and scantily punctate than it is in E, konae,

Hab. Molokai, Kalawao; mts. vi. 1896 (Perkins).

(i8) Eopenthes mauiensis, sp. nov.

Nigerrimus, nitidus, nigro-pubescens, femoribus flavis, tibiis ante apicem vage
flavescentibus ; prothorace nitido, parce punctato ; elytris profunde striatis. Long,
ro mm., lat 3 mm.

Rather broader than E. gracilis, with thicker and rather longer antennae, and
more deeply striated elytra. Resembles E, cognatus slightly, but is quite distinct.
Five specimens.

Hab. Maui, Haleakala, 5000 ft. v. 1896 (Perkins).

COLEOPTERA

m

(19) Eopenthes ttnicolor, sp. nov.

Nigerrimus, nigro-pubescens, sat nitidus, thorace sat fortiter punctate; tarsis
gracilibus, articulo quarto baud abbreviate ; elytris sat profunde striatis. Long. 7—8 mm.

Resembles the variety of E, cognattis with dark legs very closely ; but in addition
to having the legs and base of the antennae completely black, it has shorter antennae
and a differendy shaped thorax, this being less elongate and parallel-sided, with the
hind angles more distinctly directed outwards. In E, unicolor the apices of the elytra
are not spinose. This character and the quite simple tarsi completely separate the
species from E. funebris, which is similar in colour and size and is also a Kauian
species. We have only two males of E. tmicolor.

Hab. Kauai, 4000 ft. vii. 1896 (Perkins).

(20) Eopenthes ftmebris, sp. nov.

Nigerrimus, gracilis, parum convexus, nitidus, nigro-pubescens, pro thorace gracili,
fortiter minus dense punctato, antennis pedibusque elongatis, tarsis anterioribus articulis
bene dilatatis, articulo quarto brevi ; elytris profunde striatis. Long. 8 mm.

Though very similar to E, cognatus, this is readily distinguished by the more
coarsely punctured thorax, and the considerably shorter fourth joint of the tarsi ; this
last character is correlative with an evident incrassation of the basal joints. There is
no doubt of the distinctness of this insect, though we have only two male specimens.

Hab. Kauai, mts. Waimea, 3000 ft. vi. 1894 ; high plateau, viii. 1896 (Perkins).

(21) Eopenthes plebeiuSy sp. nov.

Rufus, plus minusve infuscatus, vix nitidus, pube elongata pallida vestitus ;
prothorace crebre fortiter punctato, angulis posterioribus evidenter divergentibus ;
elytrorum marginibus saepe dilutioribus. Long. 9 — gf mm.

We have six examples of this species, all of which are males. It appears to be
variable as to colour, but not in a definite (or racial) manner. One of its most
conspicuous characters is the pallid pubescence, which is longer and more conspicuous
than usual. The head is never quite black. The punctuation of the thorax is rather
dense and coarse ; the elytra are deeply striate, and the punctuation of the interstices
makes them rough ; the apices have no spine, or only a minute trace of one, at the tips.
The legs and antennae are elongate.

The parts of the body are more or less infuscate. In the example with greatest
development of this dark colour, the thorax is nearly entirely black : the insect then
resembles the male of E, obscurus, but the side margins of the elytra as well as

49—2

378 FAUNA HAWAIIENSIS

the base remain pale, and the pubescence of the surface is very different It is
considerably larger than E. satelles of the same island and has not a definitely black
head and thorax.

Hab. Lanai. Lanaihale ; above Koele ; Halepaakai ; July, 1894 (Perkins).

(22) Eopenthes arduus, sp. nov,

Rufescens, nitidus, pube pallida minus conspicue vestitus, capite nigricante, antennis
fusco-rufis ; prothorace sat crebre minus fortiter punctato ; elytris profunde striatis,
apicibus minus attenuatis, minute spinosis. Long. 7^^ — %^ mm.

We have one male and three females of this species ; it is very difficult to
distinguish by good characters from either E, antennatus or E. ambiguus, but I believe
it will prove distinct. It is considerably larger and broader than E. ambiguus^ and the
coloration though variable in both appears never to quite agree : the feet are not black
in E, arduus, and the thorax is not red with a large black patch on the middle, but
is either nearly red or nearly black.

It is apparently smaller than the inadequately known E, antennatus, and is less
depressed, and has the thorax less straight-sided, and the sides less convergent in front.

Hab. Oahu (Perkins).

{22,) Eopenthes antennattis, sp. nov.

F'usco-niger, elytrorum basi vage rufescente, antennis pedibusque fusco-rufis ;
thorace elongato, antrorsum angustato, dense fortiter punctato. Long. 10 — 10^ mm.

Var. Thorace parcius punctato, elytris concoloribus.

Distinguished from E, konae by the larger development of the antennae of the
male, and by the thorax being regularly narrowed to the front. The antennae are
5 mm. long, their joints are broader and more serrate than they are in E. konae. Six
specimens. There is a great deal of discrepancy in these individuals, so that if they
are all one species it must be a very variable one.

Hab. Oahu, viii. 1900 (Perkins).

(24) Eopenthes oahuensis, sp. nov.

Niger, nitidus, parce subtiliter pubescens, elytris summa basi flavescente, pedibus
testaceis, antennis testaceis vel fusco-testaceis basi testacea ; prothorace parce punctato.
Long, 'j—'j^ mm.

Narrow, with the hind angles of the thorax but little divergent. Though rather
similar to some of the varieties of E. konae there is no doubt of its distinctness. Four
specimens.

Hab. Oahu (Perkins).

COLEOPTERA

379

(25) Eope7ithes varians, sp. nov.
Colore varians ; saepe nigerrimus, parce minus subtiliter fusco-pubescens ; pro-
thorace fortiter punctato, elytris profunda striatis, apicibus baud spinosis. Long*.
6^— 8|: mm.

Var. a, Elytris dimidio basali pallido.
,, b. Niger, pedibus flavis,

„ c, Elytris dimidio basali pallido, pedibus flavis.
The great variability in colour of this species is accompanied by a considerable
sexual difference in size and form, but the species cannot be confounded with any other
found on Molokai. Fifty specimens.

Hab. Molokai, Mountains, 12. vii. 1893; 4000 ft. 12. viii. 1893; 9- vi. 1893;
4000 ft. VI. 1896; Kalae mts. 7. vin. 1893; Makakupaia, 26. xii. 1893; Kalawao, 8.
VIII. 1893 (Perkins).

(26) Eopenthes sateiles Blackburn.

Eopenthes satelles Blackburn, Tr. Dublin Soc. in. 1885, p. 155.

Niger, pallido-pubescens, elytris pedibusque infuscato-testaceis ; prothorace fortiter
punctato, nitido, elytris profunde striatis. Long. 7 — 7^^ mm.

This species has a coarsely but not densely punctured thorax, on which the rough,
pallid, pubescence stands out very conspicuously ; the hind angles of the thorax are
usually rufescent. The species appears to be very closely allied to E, ambtguus
structurally, and the tarsi are almost the same in the two, but E. satelles has the
apical part of the elytra less attenuate, and the apices very indistinctly spinose. The
colour varies somewhat, and the female appears to be usually rather larger than the
male, and has less elongate legs and tarsi, which too are usually paler in colour, being
yellow, more or less slightly infuscate. Seventeen specimens.

Hab. Lanai. Halepaakai, vii. 1896; Lanaihale, vii. 1894 ^^d vii, 1896; mts.
Koele, 3000ft. vii. 1894 (Perkins); Koele (Blackburn).

(27) Eopenthes tinctus, sp. nov.

^. Nigro-rufus, elytrorum basi rufescente ; prothorace minus crebre sat fortiter
punctato ; elytris profunde striatis, apicibus spinosis. Long. 8, lat. 2 mm.

We have only one specimen of this species, and it is in bad preservation, all the
pubescence being rubbed off It appears to be nearest to E, ambiguus, but it has the
antennae comparatively shorter and broader, and the tarsi rather broader and thicker
There is considerable difference in the colour, but this is of little importance ; the colour
in both is obscure red with the elytra testaceous, and all the parts more or less infused

38o FAUNA HAWAIIENSIS

with black ; this dark infusion is greater in E. tinctus, so that the thorax above is
black with reddish angles. On the under surface, either the black or the red colour
predominates on several parts, but this is no doubt variable. From E, muticus, which
it superficially somewhat resembles, it is distinguished by the strong denticulation of the
prosternal process. It is smaller and more slender than E. konae and E, cognatus,

Hab. Hawaii, Olaa, xi. 1896 (Perkins).

(28) Eopenthes ambiguti^s Blackburn.

Eopenthes ambiguus Blackburn, Tr. Dublin Soc. in. 1885, p. 155.

Angustus, sordide testaceus, prothorace disco late nigricante, crebre sat fortiter
punctato : elytris sat profunde striatis, plus minusve infuscatis. Long, 7 — 8 mm.

The small series of examples — 14 in number — before me indicate a variable insect,
with elongate antennae in the male, and slender feet without dilated joints ; the thorax
is subparallel at the sides, the hind angles being comparatively little turned outwards.

Hab. Oahu (Perkins) ; Palolo valley, 2000 ft. (Blackburn).

(29) Eopenthes muticus, sp. nov.

$, Angustus, baud convexus, nigricans, elytris testaceis, circa scutellum, sutura
apiceque nigricantibus, antennarum basi pedibusque sordide testaceis. Long. 7^,
lat. if mm.

Plate XHL fig. 6,

An obscurely, or indefinitely coloured insect, of slender form, with elongate
antennae and legs, distinguished from its allies by these characters, and by the fact that
the prosternal process is more than usually abruptly bent upwards behind the coxae,
and has no tubercle on it (Plate XHL fig. 9). The angles of the thorax are strongly
divergent, the punctuation rather coarse. The elytra are rather deeply striate ; at the
tips they are slightly sinuate, and though not really denticulate, end in a very acute
angle. There does not appear to be any dilatation of the tarsal joints, the fourth joint
is slender and elongate. The eight specimens before me are all males.

Hab. Kauai, high plateau, viii. 1896 ; 4000 ft. vii. 1896 (Perkins).

(30) Eopenthes debilis Sharp.

E. debilis Sharp, Tr. Dublin Soc. in. 1885, p. 154.

Mr Perkins has met with only one individual of this species. It may be readily
distinguished from all the varieties of E, ambiguus, by the tarsal structure ; the small
fourth joint of the hind tarsus in E. debilis is a striking and distinctive character.
The length is 7 mm.

Hab. Oahu (Perkins) ; Waianae mountains, 2500 ft. (Blackburn).

COLEOPTERA 381

(31) Eopenthes pai^ulus, sp. nov.

Rufulus, capite nigro ; elytris pallidis, subtiliter striatis, striis ad apicem perparum
impressis ; tarsis articulis bene dilatatis, articulo quarto minuto. Long. 6 mm.

This is one of the smallest Eopenthes, We have only 6 specimens ; they are all
females, and are distinguished from E. debilis by the rather smaller size, and the more
delicate striation of the elytra. The distinctness of the species requires confirmation
by comparison of larger series of the two forms.

Hab. Oahu. N.W. Koolau range, vii. 1901 and viii. 1901 (Perkins).

(32) Eopenthes marginatus, sp. nov.

t Niger, elytris pallidis, nigro-marginatis, an tennis pedibusque fusco-testaceis ; pro-
thorace crebrius fortiter punctato, elytris striatis, striis apicem versus obsoletis. Long.
5i nim.

This is the smallest of the Eopenthes. We have only one specimen ; it is a male,
and comes very near E, pai'vulus, though extremely different in colour. Our specimens
of E. parvulus are all females, and E, marginatus therefore is at present a doubtful
species. It may prove to be a variety of the male of E. parvulus. The elytra are very
pallid with the suture and the extreme tips black, and. the black colour extends forwards
along the extreme outer margin ; the extreme base of the elytra is also black. The
interstices of the elytra are very narrow, and the apices are very attenuate.

Hab. Oahu. N.W. Koolau range, vii. 1901 (Perkins).

(33) Eopenthes tar satis ^ sp. nov.

% Niger, pedibus flavis, elytro singulo plaga magna pallida, antennis fusco-flavis.
Long. 8^, lat. 2 mm.

This species is very readily recognisable by the remarkably definite coloration and
the fact that the dilatation of the tarsi here reaches its maximum. We have only one
female. The form is rather elongate and parallel ; the thorax is rather closely and
coarsely punctured. The elytra have a black triangle at the base, the apical portion
is broadly black, and the suture and side-margins narrowly black. Underneath the
colour is intensely black : the legs are yellow. The dilatation of the tarsi is as well
marked in the hind as it is in the front pair.

Hab. Kauai, Lihue, 3000 ft. vii. 1896 (Perkins).

382 FAUNA HAWAIIENSIS

Itodacnus Sharp.
Itodacnus Sharp, Tr. Dublin Soc, in. 1885, p. 156.

(i) Itodacnus coruscus, Karsch.

Corymbites cortiscus Karsch, Berlin, ent. Zeitschr. xxv. p. 5, PL I. fig. 6.
We have not received any Itodacnus from the island of Maui, and I am not able
to say whether Karsch's coruscus is distinct from gracilis or not.
Hab. Maui (Olinda, Dr Finsch).

(2) Itodacnus major, sp. no v.

Fusco-rufus, prothoracis marginibus, antennis pedibusque testaceis ; elytris elon-
gatis profunde striatis. Long. Z 15 i^n^. ; % 16^ — 17 mm.

Allied to /. g7^acilis, but larger and of different proportions, the elytra being longer
in comparison with the thorax. There is very considerable difference in the sexes, the
male being smaller and much more slender than the female. In the male the length of
the thorax from front margin to hind angle is nearly 3^^ mm., that of the elytra 1 1 mm. ;
in the female the thoracic length is 4^ mm,, the elytral length 12 mm. The antenna
of the male is fully 8 mm., that of the female fully 7 mm. These measurements are
quite sufficient to distinguish the species. Five specimens.

Hab. Kauai. 4000 ft. vii. 1896; high plateau, viii. 1896 (Perkins).

(3) Itodacnus gracilis Sharp.

Itodacnus gracilis Sharp, Tr. Dublin Soc. iii. 1885, p. 156, PI. IV. fig. 18.

We have a large series of this species. The female is a good deal larger than the
male, so that there is considerable difference in size between the smallest male and the
largest female; the respective dimensions being 11^ and 16 mm. The male antennae
attain a length of 7^ mm. and those of the female 6^ mm. In the male the length of
the thorax from front margin to hind angle is \\ mm., that of the elytra scarcely 9^.
The length of the thorax in the female is 5 mm,, and that of the elytra about \o\.

Though the species is found on two distant islands, there is but little variation.
Many of the specimens from Hawaii are somewhat darker in colour than those from
Oahu. We have received about 1 20 examples of /. gracilis, about 30 of them being
from Oahu.

Hab. Oahu, Hawaii. — Oahu: Honolulu (Blackburn, Perkins); 2000 ft. ix. 1896;
N.W. Koolau range, v. 1901 and vii. 1901. — Hawaii: Olaa, on several occasions;
above Hilo, viii. 1896 and 11. 1897 (Perkins).

COLEOPTERA 383

(4) Itodacnus kauaiensis, sp, nov.

? Niger, prothoracis margine posteriory antennis pedibusque testaceis, elytris rufo-
brunneis. Long. ii|^ — 12 mm.

This is very similar to /. gracilis, but is of less elongate form, and is distinguished
by some small structural characters ; the thorax being shorter than in /. gracilis, and
the prosternal process more abruptly bent behind the coxae. A second character is found
in the lamina of the hind coxa, the outer of the two projections therefrom being much
less than it is in /. gracilis. The sculpture of the two species is very similar. The
length of the prothorax is only 3 or 3^ mm., that of the elytra 8 mm. Three specimens.

Hab. Kauai: Lihue, 3000 ft. vii. 1896; 4000ft. vii. 1896; Halemanu, 4000 ft.
V. 1895 (Perkins).

(5) Itodacnus blackburniamis, sp. nov.

Nigricans, antennis pedibusque testaceis, prothoracis margine summo elytrisque
rufescentibus ; thorace antrorsum minus angustato, subtiliter punctato ; lamina coxarum
posteriorium angulo externo perparum prominente, rotundato. Long. 8 — 10 mm.

Considerably smaller than /. gracilis, or /. kauaiensis, and with the thorax less
narrowed in front, and rather more finely punctured ; readily distinguished from them
by the very slight prominence of the angle of the coxal lamina, which in fact has almost
ceased to exist.

We have only two males and five females of this species.

Hab. Hawaii: Kilauea, 4000 ft. viil 1894, viii. 1895, ^^^ ^'i^^* 1896; Mauna
Loa, 4000 ft. 12. VIIL 1892 (Perkins).

(6) Itodacnus sordidus, sp. nov.

Fusco-testaceus, prothoracis margine posteriore, antennis pedibusque testaceis,
elytris rufo-brunneis ; lamina coxarum posteriorium, angulo externo perparum promi-
nente. Long. 8^ — 9^^ mm.

This species comes very close to /. blackburnianus, but it has the thorax still more
abbreviate, it being only 2 or 2^ mm. long. It is also a Hatter and less convex insect
and is, I have no doubt, distinct. We have only one male and two females of the
species. The male has the antennae much longer than the female, they being 5 mm.
long ; in the female only 3f mm. The darker patch on the thorax appears to be
formed by the union of two longitudinal marks, and leaves the margins paler in an
indefinite manner.

Hab. Kauai : mts. Waimea, 3000 ft. iv. 1894 and 4000 ft. vir. 1896 (Perkins).
F. H. III. 50

384 FAUNA HAWAIIENSIS

(7) Itodacnus ckloroticus, sp. nov.

Angustus, stramineo-testaceus, baud nitidus, prothorace subtiliter punctate. Long.
6^ — 8 mm.

Distinguished from all the other species by its extremely pallid colour and the
reduced sculpture and pubescence. We have only three examples, two of which are
females, while the third specimen, the smallest of the three, is, I believe, a male.

The thorax is remarkably straight at the sides, being very little rounded and
narrowed in front ; its hind angles are very fine and sharp ; its surface has a peculiar
silky dulness, on which the fine punctuation shows but little. The elytra are rather
deeply striate, and the punctuation on the interstices is rather fine. The pubescence is
everywhere very minute and inconspicuous.

Hab. Oahu (Perkins and Koebele) ; N.W. Koolau range, vii. rgoi (Perkins).

(8) Itodacnus collaris, sp. nov.

Angustus, haud depressus, prothorace subtiliter punctato, elongato, lateribus sub-
parallelis ; elytris profunde striatis. Long. 9 mm.

We have only two specimens of this species, which are very discrepant in colour,
so that I have not alluded to this in the diagnosis ; one is entirely rufescent, with pallid
antennae and legs, and the other has the head and the greater part of the thorax and
under surface blackish. Both are males, and the colour of the paler specimen is
probably due to immaturity.

Although resembling pretty closely /. blackburnianus, /. collaris is quite distinct,
as it has the angle of the inner lamina of the hind coxa much more prominent : the legs
of /. collaris are also considerably stouter. In this character and in general appearance
it makes some approach to the genus Dacnitus,

Hab. Molokai, June, 1896 (Perkins).

Dacnitus, gen. nov.

Corpus breve, pedibus majusculis. Metasternum abbreviatum. Coxae posteriores
lamina externa fere nulla, lamina interna angusta, excisione trochanterali fere nulla.

This may be briefly described as an Itodacnus, with cursorial legs. The short
hind-body and the abbreviated metasternum make it probable that when more material
is found for study the insect will prove to be a flightless form.

Although in some of the species of Itodacnus the inner lamina of the hind coxa,
as well as the outer one, is considerably reduced, yet these are not intermediates in
this respect between Itodacnus and Dacnitus. For in this genus the lobe though
reduced in width, is increased in length.

COLEOPTERA 385

(i) Dacnitus currax, sp. nov.

Fusco-niger, haud nitidus, antennis pedlbusque fusco-testaceis ; parcius pubescens ;
prothorace suboblongo, parce punctate ; elytris convexiusculis, profunde striatis.
Long. 6|^ mm.

Plate XIII. fig, 8.

We have only two specimens of this curious little Elater. I do not know their
sex, but suspect them to be males, and that the female may be a larger insect, perhaps
considerably different in form.

The antennae are very long, not serrate. The head is coarsely and very densely
punctured ; in strong opposition to the thorax, which has but little punctuation. The
sides of the thorax are slightly bisinuate ; and there is no raised line on the inner
margin of the hind thoracic angles. The scutellum is quite distinct but not so elongate
and pointed at the tip as is usual. The elytral striae are deep and there is very little
sculpture on the interstices ; these show some irregularities, different in the two indi-
viduals. The legs are both long and stout, the femora projecting much beyond the
sides of the bodies.

Hab. Kauai, 13. iv. 1895. Or^ the high plateau, under a log or stone on damp
mud (Perkins).

Subfam. EUCNEMINL

The subfamily Eucnemini includes at present about 600 species, and is found in
all parts of the world except the cold regions. It is apparently entirely xylophagous,
all the species living in the wood of trees. It is most difficult to deal with, as the
species are extremely rare in collections, and most of them have been founded on
unique specimens. Hence the classification of the group is in a very rudimentary state.
It was monographed by Bonvouloir in 1870 (Ann. Soc. ent. France, sen 4, Vol. x.
suppl.) and his classification was little more than a tabulation of the genera intended to
facilitate the determination of the species. The genera Df^omaeohts and Fornax were
recognised by him as two of the most extensive, and were diagnosed by the relation
of the eye to the groove for the antennae. Our species with one exception all belong
to these two genera, and it would be impossible in the case of some of them to say
whether they should be placed in Dromaeolus or Fornax.

Recently (Ann. Soc. ent. France, lxx. 1901, pp. 636 — 664), the genera have been
treated by M. Fleutiaux in a new table in which Bonvouloir's character has been
entirely abandoned, and Fornax and Dromaeolus are distinguished by the former
possessing dentate, the latter simple claws. According to this all our species (with the
one exception noticed) coxne under Dromaeolus^ and I have here adopted that view.

50 — 2

386 FAUNA HAWAII EN SIS

D, perkinsi and its near ally D. germanus have no connection with the other
Dromaeolus found in the Hawaiian Islands, but I do not separate them as a distinct
genus because of the unsatisfactory condition of the taxonomy of the subfamily.

I have recognised '^'^ species of Dromaeolus in the Hawaiian Islands. It is
probable that all are precinctive. The material before me for dealing with this division
is very inadequate. Leaving out of the question the two isolated species mentioned
above we have less than lOO specimens, an average of about three to a species. As
some of the species of Eucnemini are known to be variable, this material is clearly
inadequate to enable me to decide on the specific limits with any certainty, and my
attempt to define the species must be considered as merely tentative.

I find that the phenomenon of flightlessness exists, as some of our most peculiar
species have nothing but mere rudiments to represent the wings. Others have the
organs of flight fully developed. Owing to the scanty material before me I am unable
to deal with this question satisfactorily, and in many cases I am only able to guess as to
whether the insect has wings or not. I am not aware that any flightless Eucneminae
have been detected elsewhere.

The following key is therefore merely a temporary device and is perhaps not
even accurate.

Group 1. Large insects, elongate and narrow, fully winged, with short coxal
laminae (all the other forms have longer coxal laminae). Species i and 2.

Group 2. Winged forms, slender in build and elongate in form ; usually of small
size. Species 3 — 16.

Group 3. Clumsily built forms of large or moderate size, most of which I believe
to be winged forms. But this is in several cases a mere guess. Species 17—27.

Group 4. Small forms with thorax large in proportion to the after body, which is
always reduced in length. Most, if not all, of the species are pretty certainly wingless.
This is however specially doubtful in the case of nos. 28 and 30, /?. cephalotes and
D: hawaiiensis. Species 28 — 33.

Dromaeolus Kiesenwetter.
Dromaeolus Kiesenwetter, Nat. Ins. iv. 2, 1858, p. 197.

Group 1.

( I ) Dromaeolus perkinsi, sp. nov.
Elongatus, angustus, nigerrimus, nitidus, pube albidescente sparsim vestitus, protho-
race canalicula brevi. Long. 10 — 15 mm., lat. 3 — 3^ mm.
Plate XIII. fig. II.
Entirely black, except that there is a white pubescence — scanty on the upper surface,

COLEOPTERA 387

more dense below — and that the tarsi are reddish towards their tips. The antennae are
elongate, reaching, when in their grooves, quite as far back as the hind margins of the
middle acetabula, the 4th joint is rather longer than broad, and the fifth still a little
longer. Thorax rather closely and coarsely punctured, with a short channel on the
middle behind. Elytra feebly striate, with the punctuation dense at the base, but
scanty elsewhere, the suture raised and forming a minute spine at the tip. Under
surface densely punctate, and with a rather abundant pallid setosity. Except in size
the species varies but little.

Z?. perkinsi and its close ally D, germanus have no relation to any of the other
Hawaiian Dromaeoli. The coxal laminae are much shorter, not reaching nearly
so far back as the ist ventral suture; the mesosternal cavity has broad margins; the
clypeus is emarginate in front ; the tarsi are stronger, with longer terminal joint and
claws.

The two species are more similar to the Californian /?. basalts, from which however
they are abruptly distinguished by the deep, definite and elongate antennal grooves.

Hab. Hawaii, Maui. — Hawaii: Kilauea, August, 1895, 16 specimens (no. 574);
Kona, 3500 ft 28. VI. 1895, ^ specimens. — Maui: Haleakala, 4000 ft. 31. iii. 1894
(Perkins).

On Maui fragments only, of two individuals however, were met with. I can find
no important difference from the Hawaiian specimens.

(2) Dromaeolus germanus, sp. no v.

Elongatus, angustus, nigerrimus, nitidus, pube albidescente sparsim vestitus, protho-
race canalicula mediana elongata. Long. 10 mm.

Very closely allied to D, perkinsi, but rather narrower with shorter antennae and
tarsi, and the channel on the middle of the thorax longer. The eyes are rather smaller
and do not infringe on the line of the antennal groove, so that even in Bonvouloir's
arrangement the species would come into Dromaeolus,

We have received only one example ; unfortunately after being examined it met
with an accident and is much damaged. It probably represents a really distinct species.

Hab. Kauai, 4000 ft. vii. 1896 (no. 640, Perkins).

Group %

(3) Dromaeolus bonvouloiri Sharp.

Fornax bonvouloiri Sharp, Tr. Dublin Soc. iii. 1885, p. 151.

This little insect is distinguished by its uniform dull, infuscate red colour, with the
pubescence rather paler, flavescent ; the dense thoracic punctuation, and the narrow^ form
much acuminate behind. The antennae are moderately long and reach back quite as

388 FAUNA HAWAIIENSIS

far as the hind margin of the middle acetabula ; the third joint is rather short, the fourth
small, about as long as broad, and half as long as the third, the fifth is distinctly larger,
slightly longer than broad, the sixth to tenth differ but little from one another, each is
much longer than broad, though hardly twice as long as broad, the terminal joint is
elongate, three times as long as broad ; the tarsi are rather long and moderately stout ;
on the hind legs the basal joint is about as long as the following four together, the
fifth joint is of moderate size, the claws are rather small ; the lamina of the hind coxa
extends quite as far back as the first ventral suture : the eyes scarcely impinge on the
antennal groove, which extends as far back as the base of the thorax independent of
the hind angles ; the outline of the thorax is very regular, there being not the least
sinuation of the sides near the hind angles. The sides of the mesothoracic cavity are
slender, and are obtuse in front, not in the least tuberculate. Length 4 — 5^ mm.
Breadth less than 2 mm.

Hab. Oahu (Blackburn); Honolulu mountains; N.W. and S.E. Koolau range
(Perkins).

I have assigned to the species, with doubt, two specimens, which are rather larger
and darker in colour, and have the fourth joint of the antenna slightly longer. They
approximate to D. arduus (Hawaii).

(4) Dromaeolus agriotoides, sp. no v.

Nigrofuscus, elongatus, angustus, postice acuminatus, flavo-pubescens, sat nitidus,
antennis pedibusque rufis, antennis elongatis. Long. T\—Z\ mm.

Allied to D, bonvouloiri, though much larger and darker in colour, and with the
upper surface more shining. The elongate antennae extend back almost to the hind
margin of the metasternum ; when placed in their grooves three joints extend beyond
the extremity of the thoracic angles ; the fourth joint is a ittle longer than broad, the
fifth is considerably longer, and the terminal joint is very long, slightly over \ mm.
The punctuation of the upper surface is rather scanty and fine, but quite definite, and
the striation of the elytra is rather more distinct than usual. The borders of the
mesosternal cavity are slender, and the punctuation of the under surface fine.

Hab. Hawaii. Two specimens; Olaa, June, 1895, ^^i^ Kilauea, July, 1895
(Perkins). Mr Koebele has also found a specimen.

(5) Dromaeolus arduus, sp. nov.

Nigrofuscus, elongatus, angustus, postice acuminatus, flavo-pubescens, haud nitidus,
antennis pedibusque rufis, illis sat elongatis. Long. 6| — 9 mm., lat. 2^ — 3 mm.

Closely allied to both /?. bonvouloiri and agriotoides. Darker in colour than the
former, with a rather long fourth joint and a shorter terminal joint to the antennae.
More densely punctate and less shining than D, agriotoides, and with shorter antennae.

COLEOPTERA 389

The feet are formed very much like those of D, bonvouloiri, the terminal joint being
shorter than in D, agriotoides.

The two specimens found in Hawaii are discordant In size; it is possible that
the form may prove to be not sufficiently distinct from D. bonvotdoiri Until more
specimens of these difficult forms can be examined it is not possible to speak with any
confidence.

The three specimens from Honolulu agree neither with this species nor with
D, bonvotdoiriy but apparently are nearest to D. arduus, of which I have labelled them
as varieties. The thorax is shorter, more strongly punctured and less narrowed in front.

Hab. Hawaii: Kona, 3000 ft. viii. 1894; Olaa, ix. 1896 (Perkins). — The variety
from Oahu was found on the mountains near Honolulu in August, 1900 (no. 785,
Perkins).

(6) Dromaeolus ctineus, sp. nov.

Elongatus, angustus, postice acuminatus, thorace elytris paulo latiore, fusconiger,
dense subtillter punctatus, pubescentia pallida ; antennis pedibusque flavis, illis elongatis.
Long. 5^ mm., lat. vix if mm.

Closely allied to D, bonvoidoiri ; of all the species the narrowest and most wedge-
shaped, the thorax being perceptibly broader than the elytra. The antennae are rather
slender, and the terminal two and a half joints extend beyond the angles of the thorax.
The punctuation of the thorax is less dense and coarse than it is In /?. bonvouloiri.
The fourth joint of the antennae is a little longer than broad, the terminal joint elongate.
Only one specimen was found, and as I cannot place it at present with either of the
other species I treat it as distinct, though it is far from improbable that it may prove to
be connected with either D. agriotoides or /?. bonvouloiri,

Hab. Hawaii: Kona, 3000 ft. August, 1894 (no. 142, Perkins).

(7) Dromaeolus soi^didus, sp. nov.

Fusco-ferrugineus, dense subtillter punctatus et pubescens, antennis elongatis.
Long. 5 1 — 6 mm.

This is broader than D, bonvouloiri and less acuminate behind, darker in colour,
much more finely punctate, \yith longer antennae, the setae and pubescence of which are
more distinct. The antennae extend back as far as the hind margin of the meta-
sternum, their third joint Is elongate, not greatly shorter than the basal one, fourth
much longer than broad. The legs are red, more or less infuscate ; the front tibiae
broad, and the second and third joints of the front feet are much smaller than the fourth.
The antennal grooves are rather broader and less sharp and definite than they are in
D, bonvouloirL Two specimens.

Hab. Oahu, Kaala mts. 2000 ft. January, 1893 (no. 34, Perkins).

390 FAUNA HAWAIIENSIS

(8) Dromaeolus obscurnsy sp. nov.

Fusco-ferrugineus, dense subtiliter punctatus et pubescens ; antennis sat elongatis.
Long. 4 — 4^ mm.

This may possibly not be distinct from /?. sordidus^ the difference in the antennae
being perhaps sexual, and the other distinctions merely due to variation. The antennae
are slightly longer than in D. bonvoiUoiri and the fourth joint evidently longer than
broad. The front tibiae of one of the two individuals are dilated, but in the other they
are not, and this renders it probable that the specimens are of two sexes. If therefore
the examples are not distinct from D, sordidus, that species will prove to be a very
variable one. Mr Perkins remembers the capture of these insects and thinks the four
specimens are probably of one species as he found them in the same log.

Hab. Oahu : Kaala mts. 2000 ft. January, 1893 (^^- 34> Perkins).

(9) Dromaeolus compressus, sp. nov.

Angustus, antice et postice angustatus, baud depressus, nigricans, antennarum
basi pedibusque rufis, vel nigricantibus ; flavo-pubescens, subtiliter punctatus, parum
nitidus. Long. 3^ mm.

Smaller than D, obscurus, less depressed, and with the thorax more narrowed in
front, and the elytra more slender at the tip. The thorax is narrowed to the front
almost in a straight line, without any curve, and the hind tibiae and tarsi are very
slender, with short terminal joint. It is not likely to be confounded with any species
except D. obscurus ; D, pachyderes, and the other small species allied to it, have a
differently shaped thorax.

We have only two specimens. The type from Maui is paler than the Hawaiian
individual ; but I cannot separate the two on such small evidence. Both have the
fourth joint of the antennae more elongate than in most of the allies : this is also the
case with D, sordidus, with which D. compressus is not likely to be confounded on account
of the differences in size and form.

Hab. Maui, Hawaii. — Maui, Jao valley, September, 1901 (no, 775). — Hawaii,
Kona, 3000 ft August, 1894 (no. 142, Perkins).

(lo) Dromaeolus konensis, sp. nov.

Fusco-ferrugineus, subtiliter minus dense punctatus, sat nitidus, flavo-pubescens,
antennis minus elongatis, cumque pedibus pallide rufis. Long. \\ mm.

Closely allied to D, bonvouloiri, of less elongate form and less attenuate behind,
darker in colour, and with finer punctuation. The antennae are shorter than those of
D. bonvouloiri, and have a shorter fifth and terminal joints. Fourth and fifth joints
rather slender, each rather longer than broad, the fifth slightly the larger, sixth — tenth

COLEOPTERA

39 J

very distinctly longer, subequal but each slightly longer than its predecessor. Thorax
with a slight depression causing the hind angles to appear to be slightly flattened, its
punctuation very fine. Elytra distinctly striate, but with only very indistinct punctuation.
Under surface very slightly punctuate. Legs and antennae clear yellow-red. This is
almost as near to D. puncticollis and D, solitarius as it is to bonvouloivL The type
specimen is nearer to bonvouloiri, but a second example (which I have treated as a
variety) is more like D, puncticollis.

Hab. Hawaii: Kona, 4000 ft. in 1897 (Perkins). The variety is from Kilauea,
August, 1896 (no. 656, Perkins).

(11) Dromaeolus puncticollis, sp. nov.

Augustus, nigricans, antennis pedibusque rufis, flavo-pubescens, haud nitidus ;
thorace dense fortiter punctato, elytris striatis ; antennis sat elongatis. Long. 5^^ — 6 mm.

This species has a coarser and closer punctuation on the thorax than any of the
others ; though of narrow form it is not acuminate behind like D, bonvouloiri. The
antennae have about one joint extending beyond the hind angle of the prothorax : the
striation of the elytra is a little more distinct than usual. The fourth joint of the
antenna is only slighdy longer than broad, and the terminal joint is moderately long.
The species has a sordid appearance, and the colour is indefinite, both legs and antennae
being more or less infuscate. The sides of the mesosternal cavity are narrow, and the
tarsi are rather slender.

We have received nine specimens of this species, and they agree sufficiently in
their characters to make me think the species is undoubtedly distinct from any other.

Hab, Hawaii. Kilauea, August, 1896 (6 specimens, no. 656); August, 1895
(3 specimens, nos. 532, 686, Perkins).

(12) Dromaeolus mixtus, sp. nov.

Augustus, rufus, antennis plus minusve nigricantibus, flavo-pubescens, haud nitidus,
thorace dense fortiter punctato, elytris striatis ; antennis sat elongatis. Long. 4 — 5 mm.

The coarse extremely dense sculpture of the thorax allies this species to D. puncti-
collis. But I do not think the two forms will be found to be connected. Besides the
differences in size and colour (which are perhaps of little importance), there is a differ-
ence in form ; D. mixtus is more convex and shorter.

There are only three specimens of this species ; two, very much alike, have the
antennae in larger part black ; the third specimen is smaller, immature and much
injured ; it has the antennae entirely yellow, possibly owing to its immaturity.

Hab. Molokai : mountains, 4000 ft. May 17th, 1893 (no. 184, Perkins).

F. H. III. 5 1

392 FAUNA HAWAIIENSIS

(13) Dromaeoius paralleltiSy Blackburn.

Fornax parallelus Blackburn, Tn Dublin Soc. iii. 1885, p. 152.
This is a remarkably elongate and narrow form, of an uniform reddish colour,
with deeply striate elytra. It has not been met with by Mr Perkins,

Hab. Oahu. In moss near the summit of Konahuanui (Blackburn, i specimen).

(14) Dromaeoius solita^Hus^ sp. nov.

Angustus, parum convexus, postice sat angustatus, niger, nitidus, flavo-pubescens,
antennis pedibusque rufis, illis elongatis ; tarsis angustis ; thorace minus dense punctato.
Long. 5 mm.

Nearest to D. puncticollis, though very different in appearance on account of the
shining surface and much diminished thoracic punctuation. On the anterior part
the punctuation is moderately coarse and close, but becomes diminished behind.
The elytra are very distinctly striate, shining ; the punctures on the interstices, and the
pubescence, scanty. Nearly two joints of the length of the antennae extend beyond
the tip of the thorax. The antennae and feet are formed much as in D, puncticollis.
One specimen, beaten from dead Acacia ; an extremely quick runner.

Hab. Hawaii: Kona, 3000ft. September, 1892 (no. 210, Perkins).

(15) Dromaeoius sculpturatus, Blackburn.

Fornax sculpturatus Blackburn, Tr. Dublin Soc. iii. 1885, p. 151.

Apparently most nearly allied to /?. sohtarius, but much more elongate. The
following is Mr Blackburn's diagnosis, '* Haud latus ; postice angustatus ; niger, antennis
pedibusque rufopiceis ; capite crebrius nee fortiter punctato ; prothorace transverso,
antice parum angustato, confuse nee crebre punctato ; elytris fortiter striatis, interstitiis
convexis, confuse nee distincte punctatis. Long. 7^ mm."

Hab. Oahu. Waianae mountains (i specimen, Blackburn).

(16) Dromaeoius mauiensis, sp. nov.

Fusco-niger, antennis pedibusque rufis, dense subtiliter punctatus et flavo-pubescens,
haud nitidus, antennis elongatis crassiusculis. Long. ']\ mm., lat. 2\ mm.

Closely allied to D, bonvouloiri, though looking very different on account of its
larger size, and broader and more clumsy form, and darker colour. The only structural
difference I see between the two is that in D, mauiensis the sides of the mesosternal
cavity are considerably broader.

COLEOPTERA

393

The antennae are clear, pale red. They are formed much as in /?. bonvouloiri
but are broader ; the fourth joint is slightly longer proportionally to its width, and the
fifth is much longer than the fourth. The legs are red, stout.

This species in appearance connects the D, bonvouloiri group with the D, obtusus
group. The shortest of the five individuals a good deal resembles small D. elateroides,
but I think the two are distinct.

Hab. Maui. Haleakala, 5000 ft. May, 1896 (nos. 605, 610, Perkins).

Group 3.

(17) Dromaeolus collaris, sp. nov.

Brevis, robustus, nigricans, thorace pedibusque nigricantibus, rufo plus minusve
dilutis, thorace fortiter punctato ; elytris profunde striatis, interstitiis subtilissime punctatis
et pubescentibus. Long. 7 mm.

In appearance most like D, molokaiensis, but apparently not closely allied to it
or to any other species ; we have however only one specimen, and I am unable to
make repeated examinations of its minute structural characters, as it is in rather bad
preservation. The antennae are elongate, rather slender, blackish, fourth and fifth
joints subequal, each longer than broad. Terminal joint elongate, tarsi slender. Elytra
deeply striate, with very little punctuation or pubescence on the slightly convex inter-
stices ; hence the pubescence is divided into separate stripes in a more remarkable
manner than in any other species.

Hab. Maui. Haleakala, 5000 ft. i April, 1894 (no. 354, Perkins).

(18) Dromaeolus obtusus, Blackburn.

Fornax obtusus Blackburn, Tr. Dublin Soc. iii. 1885, p. 152.

The individuals of this species are the largest of this section of the genus, and
remarkable on account of their broad, robust form. The thorax is not gradually narrowed
from the base to the front, the marked convergence only occurring from the middle.
The punctuation is coarse ; the pubescence short and inconspicuous ; the length varies
from 8 — 10^ mm. or perhaps a little more.

Mr Perkins has met with seven specimens, but most of them were found dead and
are in very bad preservation. Mr Blackburn found two specimens, one of them being
also very mutilated. His description leads one, I think, to anticipate a finer punctuation
than really exists.

Hab. Maui. Haleakala, 5000 ft. (Blackburn and Perkins). Perkins* specimens
are dated 31 March, 1894, and May, 1896.

SI— 2

394 FAUNA HAWAIIENSIS

(19) Dromaeolus elateroides, sp, nov.

Robustus, sat latus, anterius satis, posterius magis acuminatus, nigricans, elytris
postice rufescentibus, parum nitidus, crebre punctatus et flavo-pubescens, antennis
pedibusque piceis vel rufis. Long. 5f — 7|- mm.

Smaller than D, obtusus, more acuminate, with rather closer and finer punctuation
and somewhat longer antennae.

Mr Perkins found six specimens that I assign to this species and portions of two
others ; they are most of them much mutilated, and as they exhibit a good deal of
difference I am not sure that all are one species. Two or three of them have the
antennae thicker than in any of the other Hawaiian species. As a similar difference
occurs in the specimens which I have determined as D. obtusus, it is possible that this
is a sexual character. They were found on various occasions, and therefore, on the
other hand, they may not be all one species.

Hab. Maui. Haleakala, 3000 — 4000 ft. in April and May, 1894 and 1896 (Perkins).

(20) Dromaeolus sp.

Mr Perkins found thorax and head, without appendages, of a Dromaeolus, prob-
ably near D. elateroides and of about the size of that species, but with the thorax
evenly and strongly narrowed from the hind angles to the front.

Hab. Hawaii. Olaa, Sept. 1896 (no. 688, Perkins).

(21) Dromaeolus sp.

Mr Perkins found portions of a specimen on Molokai that resembles an extremely
small D. elateroides but has the wings reduced to mere rudiments. Although I am
not sure that D. elateroides is a winged form yet I have little doubt of it, and I consider
therefore that the Molokai fragment represents a distinct species.

Hab. Molokai: mountains, in June, 1896 (no. 593, Perkins).

(22) Dromaeolus brachycerus, sp. nov.

Nigro-fuscus, subparallelus, flavo-pubescens, haud nitidus, dense punctatus, antennis
pedibusque rufis ; antennis articulis quarto et quinto subaequalibus, singulo quadrato.
Long, ']\ mm.

We have only one example of this species, and it is mutilated, having been found
dead (as is often the case with Eucnemidae), but it is so distinct that I venture to
describe it.

COLEOPTERA 395

The antennae are rather stout and short, the fourth joint not longer than broad,
the fifth a little longer, the third about as long as these two and half the sixth together,
terminal joint rather long, stout Thorax strongly transverse, differing from the species
grouped round D. obtusus by the less developed hind angles, rather closely and coarsely
punctured, not shining. Elytra distinctly striate, the interstitial punctuation rather coarse.
[Coxal laminae falling very distinctly short of the first ventral suture.] Tarsi slender,
their last joint small. The character drawn from the hind coxae may possibly be due
to the disarticulated condition of the specimen.

Hab. Oahu : mountains behind Honolulu, December, 1896 (Perkins).

(23) Dromaeohis sputato7^y sp. nov.

Robustus, sat latus, piceo-niger, vel piceo-rufus, crebre subtiliter punctatus, dense
flavo-pubescens, subopacus ; antennis, modice elongatis, pedibusque sordide testaceis,
prothorace elongato et lato ; tarsis angustis. Long. 8 — %\ mm.

Much narrower than D. obtusus, and with the antennae different from those of
D, brachycerus. They are rather slender, and about one joint extends beyond the thoracic
angle ; the fourth joint is rather longer than broad. The thorax is long, not much
narrowed in front and distinctly broader than the elytra. The striation on the elytra
moderately deep. The tarsi are more slender in this species and in D. molokaiensis
than in any of the other large species. Two specimens, found in fallen decaying acacias.

Hab. Hawaii. Mauna Loa, 4000 ft. September, 1892 (Perkins).

(24) Dromaeolus mololokaiensis, sp. nov.

Convexus, crassus, haud elongatus, piceus, haud nitidus, flavo-pubescens, antennis
pedibusque rufis, illis haud elongatis, parum crassis. Long. 7^ mm. lat. fere 3 mm.

Allied to D, obtusus and elateroides : of very convex form, and readily distinguished
from the two species by its smaller antennae and more slender legs. The antennae are
rather slender, and do not extend backwards quite so far as the thoracic angles, the
third joint is rather slender, distinctly longer than broad, the following joints are rather
more slender and less elongate than they are in the allied species, the terminal joint is
moderately long, about twice as long as the fifth. The punctuation is moderately coarse
and close ; the thorax is but litde narrowed in front We have only one example.

Hab. Molokai: mountains, 40CX) — 5000 ft. 24 August, 1893 (Perkins).

(25) Dromaeolus subtilis, sp. nov.
Robustus, elongatus, sat latus, postice acuminatus, parum nitidus, subtilissime
pubescens, thorace elongato, anterius angustato, angulis posterioribus elongatis, dense
subtiliter punctato ; elytris evidenter striatis, interstitiis discrete punctatis : antennis
elongatis. Long. ^\ mm.

396 FAUNA HAWAIIENSIS

Very close to D, obtusus, but narrower, acuminate behind, with a differently shaped
and much more finely punctured thorax, and very delicate pubescence on the upper
surface. The colour is very much that of Z>. obtttsus, fuscous-black or piceous, with
the elytra behind obscurely reddish. We have only one specimen, which in general
structure seems extremely similar to D. obtusus, the legs and antennae being however
a little more elongate ; the terminal joint of the hind tarsus is longer than in any other
species, and the last ventral plate is a good deal prolonged and a little bent at the apex
in the middle so as to be somewhat gutter-like.

Hab. Oahu. Kaala mountains, 2000 ft January, 1893 (^^' 55' Perkins).

(26) Dromaeohis concolor, sp. no v.

Latiusculus, convexus, rufus, antennis pedibusque flavis, crebre subtiliter punctatus,
subnitidus, subtiliter flavo-pubescens. Long. 5 — 5^ mm., lat. 2 mm.

The antennae are rather long and stout, one joint extending beyond the tip of
the thoracic angle, the fourth joint is small, scarcely so long as broad and a good deal
shorter than the fifth, terminal joint elongate. Thorax large, with large hind angles,
but no depression of the surface in front of them. Striation of elytra fine ; the punc-
tuation and pubescence on thorax and elytra are fine, but still render the surface
moderately dull; the thorax is about if mm. long, the elytra about 3 mm. Fourth
joint of the tarsi small, the terminal joint rather long. This is about the size of
D, bonvotiloiri, but is considerably broader, and has broader sides to the mesosternal
cavity and a broader prosternal process, and a much shorter basal joint to the hind
tarsus. It is more nearly allied to D. obtusus, but besides the great difference in size
and colour, it is more finely punctate. Four specimens.

The specimens were reared from the larval state, and the colour may therefore be
darker in fully mature examples. Some fragments found by Mr Perkins on Haleakala
in March, 1894, apparently belong to this species, and seem to be of much the same
coloration.

Hab. Maui. Haleakala, 5000 ft. May, 1896 (no. 617, Perkins).

(27) Dromaeolus pigei% sp, nov.

Latiusculus, brevis, convexus, rufus, antennis pedibusque flavis, subtiliter flavo-
pubescens, subnitidus, thorace anterius dense fortiterque punctato. Long. 4—4^ mm.

Very similar to D, concolor but smaller, more attenuate behind, and with a denser
and coarser punctuation of the thorax, especially on the anterior part, and with a much
shorter terminal joint to the tarsi. Two specimens.

This species seems really distinct. It has the hind angles of the thorax remarkably
long and attenuate. In size it connects the D. obtusus forms with D. packyderes.

Hab. Kauai : on the high plateau, August 1896 (no. 682, Perkins).

COLEOPTERA 2>97

Group 4.

(28) Dromaeolus cephalotes, sp. nov.

Parum elongatus, convexus, piceo-iiiger, antennis pedibusque rufis, dense subtiliter
punctatus, flavo-pubescens, parum nitidus ; capite fortiter profundeque punctate. Long.
5f mm.

In size and form this comes nearest to D, concolor, but differs from it and from
all the other species, except D, ptmcticeps, by the punctuation of the head differing in a
very remarkable manner from that of the rest of the body. From D. pundiceps it differs
in not being shining, owing to its denser and finer punctuation and pubescence. The
antennae are rather long, and bear a conspicuous setosity, the fourth joint is longer
than broad, and as long as the fifth ; the terminal joint is longer than usual but not
twice as long as the tenth. In the unique specimen it is peculiarly flattened or com-
pressed. It is possible this insect may be the other sex of D. puncticeps, but I think
this is highly improbable. In fact I shall not be surprised if D, cephalotes prove to be
a winged, and D, puncticeps a wingless, form.

Hab. Kauai: high plateau, August, 1896 (no. 682, Perkins).

(29) Dromaeolus puncticeps , sp. nov.

Parum elongatus, anterius et posterius angustatus, piceus, nitidus, flavo-pubescens,
antennis rufo-piceis, pedibus rufis ; thorace magno, anterius fortiter angustato ; capite
fortiter punctato, nitido. Long. 4I — 5 mm., lat. if mm.

This insect has the thorax large in proportion to the elytra, and the hind angles
large. The antennae are rather long and pilose, the space by which they are separated
is less than usual. There is not much punctuation on the thorax, so that the deep
coarse punctures on the head are strongly contrasted with the other sculpture.

Four specimens. I think the two sexes are among them, but am not at all sure.
The species will I think prove to be apterous, its proportions being more like those of
D. pachyderes than those of the forms I have assumed to be winged.

Hab. Kauai : on the high plateau, August, 1896 (no. 682, Perkins).

(30) Dromaeolus hawaiiensis, sp. nov.

Piceo-niger, subtiliter flavo-pubescens, nitidus, antennis piceis, pedibus fusco-
testaceis ; thorace obsolete punctato. Long. 4f mm.

This is closely allied to D. puncticeps, but lacks the salient features of that species ;
it is distinguishable from it by the less coarsely punctured upper surface, and by the
thorax being less broad behind and less narrowed in front. The antennal cavities are
not at all margined above. One specimen.

Hab, Hawaii: August, 1895 (no. 686, Perkins).

398 FAUNA HAWAIIENSIS

(31) Dromaeolus pachydereSy sp. no v.

Brevis, posterius angustatus, piceus, flavo-pubescens, antennis rufo-piceis, pedibus
rufis ; prothorace subobsolete punctato. Long. 3!^ — 4^ mm.

This little insect is smaller than /?. ptmcticeps or D. hawaiiensis, and has the
thorax less narrowed in front than the first of these. The antennae are rather long,
formed much as in /?. puncticeps, but rather less long and stout, the fourth joint, as in
that species, as long as the fifth : the elytra are finely striate, the sutural stria rather
deep, and distinctly deeper at the apex, but not so as to give rise there to the appearance
of foveation that exists in many of the species. The fourth and fifth joints of the
tarsi are small, the fifth being much smaller than it is in D. puncttceps. The wings
in this species are reduced to small functionless slips a little longer than the metathorax,
remarkably narrow, without nervures.

Three examples of this species were bred by Mr Perkins in August, 1900, from
Pipturus ; Tantalus (no. 785). I also assign to this species four individuals bred by
Mr Perkins from Koa wood, in August, 1900 (no. 892). The locality though not
stated is doubtless the mountains near Honolulu.

Hab. Oahu (Perkins, as above noted).

Dromaeolus pachyderes, var. katiaiensis^ var. no v.

Brevis, posterius angustatus, ferrugineus, flavo-pubescens, antennis extrorsum ob-
scuris, basi dilutiore, pedibus flavis ; prothorace subtilius punctato. Long. 4 mm.

Hab. Kauai : mts. Waimea (nos. 267, 862, Perkins). The two specimens are
so near to the specimens from Oahu that I do not venture to separate them on such
slight evidence. There is however a little difference in the form of the angles of the
thorax, which are straighter than in the Oahu examples, and not in the least incurved
(no. 267).

A third specimen is considerably smaller, narrower, and less punctate. I have
little doubt it is a different species, but the individual is too mutilated to treat as a
type of a named species in so difficult a group.

(32) Dromaeolus grandicollis, sp. no v.

Brevis, posterius acuminatus, thorace magno, ferrugineus vel fusco-ferrugineus,
crebre subtiliter punctatus, flavo-pubescens ; elytris striatis. Long. 4^ — 5 mm.

Very close to D. pachyderes ; slightly longer and narrower behind, with elytra
a little more distinctly striate, the antennae a little thicker, and the terminal joint of
the tarsi distinctly longer ; the fourth joint of the antenna is short, not longer than broad.

In addition to the three examples from Hawaii from which I describe this species,
Mr Perkins found a single individual in each of three other islands ; they are so near to

COLEOPTERA 399

D. grandicollis that I cannot distinguish them on such slender evidence : they are
(i) a specimen found dead and completely abraded on Molokai, about 3000 ft. in May
or June, 1893: (2) a specimen found on Haleakala, Maui, about 5000 ft. in May, 1895
(no. 610): (3) a specimen found on Kauai on the high plateau in August, 1896
(no. 682). I should suppose that the example from Maui may prove to be distinct, as
it has a larger and broader thorax. The other two are superficially extremely near
to the Hawaiian examples.

Hab. Hawaii: Kona, 2500 and 4000 ft. (Perkins).— Also Molokai .^ Maui?,
Kauai ?, as above.

(33) Dromaeolus pumilio, sp. no v.

Brevis, convexus, rufus, antennis extrorsum obscurioribus, pedibus flavis ; omnium
parce obsoleteque punctatus et pubescens. Long. 2f mm.

Plate X HI. fig. 13.

This little insect appears to be very distinct ; the thorax is scarcely at all narrowed
in front, the antennal grooves are not definitely limited behind, the prosternal process
is minute ; the abdomen is very short, so that the coxal laminae are short and transverse,
though they extend as far as the first ventral suture : the head is deeply retracted in
the thorax, the anterior opening of the latter being large : the angles of the thorax
are large, and very closely applied to the elytra, and there is a considerable depression
of the surface in front of the angles. The antennae are moderately long and stout,
with the fourth joint rather longer than broad. There is almost no punctuation and
only a scanty pubescence on the thorax, so that it is unusually shining ; the elytra are
much narrowed behind, delicately striate, with but little punctuation. Legs moderately
stout, terminal joint of tarsus with the claws moderate. Two specimens.

Hab. Oahu : Kawailoa gulch, April, 1893 (^C). 415, Perkins).

Ceratotaxia, gen. nov.

Antennae articulis 4 — 7 brevibus subaequalibus, articulis 8 — 1 1 elongatis sub-
aequalibus.

Prothorax absque canaliculis.

Coxae posteriores, exterius brevissimae, interius abrupte sat dilatatae.

This genus can only be placed near to Tharops, from which it differs widely in
the structure of the antennae, agreeing in this with Dyscolotaxia Horn. Dyscolotaxia
is said however to be, except in respect of its antennae, a Fornax; and if that be
correct, then Ceratotaxia can have no connection with it, owing to the absence of
antennal grooves, and to the form of the coxal laminae. It appears therefore at present
to be quite isolated from any known form.

F. H. III. 52

400 FAUNA HAWAIIENSIS

(i) Ceratotaxia tristis, sp. nov.

Elongatus, angustatus, parum convexus, nigro-rufus vel niger, baud nitidus, dense
sed subtiliter pubescens : pedibus testaceis. Long. 5^ mm.

Plate XIII. fig. 12.

Antennae rather stout, the elongate terminal four joints rather stouter than the
others. Thorax short, a good deal narrowed in front, rather finely and closely punctured,
^not shining, hind angles not very large. Elytra elongate, a little narrowed behind, not
at all acuminate, rather feebly striate. Legs slender, hind tarsi long and slender,
with minute fourth joint and elongate terminal joint.

In general form this has a good deal of resemblance to Dromaeolus puncticollis.
Only three specimens have been met with. Two of them agree fairly well : the third
from a different locality (Kona) is darker in colour, and slightly smaller.

Hab. Hawaii: Kilauea, vii. 1895 (^o- 576) ; Kona, 4000 ft. i. vii, 1892 (no. 338,
Perkins).

Fam. BUPRESTIDAE.

BupRESTis Linnaeus.
Buprestis Linnaeus, Syst Nat. ed. 10, 1760, p. 408.

(i) Btiprestis adjecta Leconte.

Btiprestis adjeda Leconte, Proc. Ac. Phil. 1854, p. 17.

This N. American species was once found at large near Honolulu. Mr Perkins
informs me that he believes there also has been a recent capture of this handsome beetle.

Hab. Oahu, Honolulu (Blackburn).

Agrilus Stephens,
y^^re/^^i" Stephens, 111. Brit. in. 1830, p. 239.

(i) Agrilus sp.

A species of the genus Agrihis has been recently introduced into Oahu. It is one
of the most obscure forms of this enormous genus, and I am not able to find a name
for it.

Hab. Oahu, Honolulu (Perkins).

COLEOPTERA 401

Fam. SCARABAEIDAE.

All of the few Hawaiian forms of this enormous family of beetles are introduced.

Trox Fabricius.
Trox Fabricius, Ent. Syst. l 1792, p. 86.

(i) Trox scaber Linnaeus.

Trox scaber Linnaeus, Syst, Nat. i. 2, p, 573.
Recently introduced.

Hab. Hawaii, above Hilo (Perkins).

Aphodius Illiger.
Apkoduis Illiger, Kaf. Preuss. 1798, p. 15.

(i) Aphodius lividus Olivier.
Aphodius lividus Olivier, Ent i. 3, p. 86, t. 26, f. 222.
Hab. All the islands (Blackburn, Perkins). Cosmopolitan.

Ataenius Harold.
Ataenius Harold, Col Heft. 11. 1867, p. 100.

(i) Ataenius pacificus Sharp.
Ataenius pacificus Sharp, Tn ent. Soc. London, 1879, p. 90.
Hab. Oahu, near Honolulu (Blackburn).

(2) Ataenius stercorator, Fabricius.

Ataenius stercorator (Fabricius), Horn, Tr. Amer. ent. Soc. iii. p. 286.
Hab. Oahu (Blackburn, Perkins).

(3) Ataenius peregrinator Harold.
Ataenius peregrinator Harold, Ann. Mus. Gen. x. p. 96.
Hab. Oahu, near Honolulu (Blackburn).

Saprosites Redtenbacher.
Saprosites Redtenbacher, Faun. Austr. 2 ed. 1858, p. 436.

52—2

402 FAUNA HAWAIIENSIS

(i) Saprosites pygmaeus Harold.
Saprosites pygmaeus Harold, Ann. Mus. Gen. x. p. 91,
Hab,. All the islands (Blackburn, Perkins).

PsAMMODius (Gyll.) Serville.

Psammodius (Gyll.) Saint-Fargeau and Serville, Encycl Meth. x. p. 359 (1825).

Psammobius Heer, Faun. Helv. i. (1841), p. 531.

Mr Perkins* collection contains two specimens of a Psammodius, one smaller and
lighter coloured than the other. To what species they belong is not certain, but
comparison with a number of species in the British Museum has shown them to be
at any rate closely allied to a species found in Guatemala, P. micros Bates (Biologia
Centrali-Americana, Coleoptera, 11. 2, p. 103).

Hab. Oahu (Perkins).

Adoretus Castelnau.
Adoretus Castelnau, Hist. Nat. 11. 1840, p. 142.

(i) Adoretus tenuimaculatus Waterhouse.

Adoretus tenuimaculatus Waterhouse, Tr. ent Soc. London, 1875, p. 112.

A, vitiensis Nonfried, Deutsche ent. Zeitschr, 1891, p. 268: Ohaus, Stettin, ent.
Zeit. 1904, p. 255.

Nonfried gives only the Fiji islands as locality for this species, but Ohaus mentions
its occurrence at Honolulu, where the species is now abundant though apparently
only recently introduced. The species is evidently diffused by commercial operations^
Ohaus was not acquainted with the fact of the species being the tenuimaculatus
described long previously by Waterhouse from Japan. The form is perhaps not distinct
from A. compressus Weber. Ohaus records also A, vitiensis from St Helena. The
only Adoretus which I have seen from there is however A. versutus Wollaston, which
is a very different species.

Whether the geographical statements summarised in the above lines be really
correct is doubtful. Mr Perkins, who has now a considerable acquaintance with the
entomology of the Fijian islands, informs me that he has never met with Fijian
examples of A, tenuimaculatus. A species of Adoretus is very abundant there, but it
is very different from A, tenuimaculatus.

Hab. All the islands : introduced about 1896 (Perkins). Also in a large number
of other islands, as well as Ports and other localities, including St Helena, Hongkong,
Ceylon.

COLEOPTERA 403

Fam. LUCANIDAE.

Apterocyclus Waterhouse.

Apterocyclus Waterhouse, Tr. ent Soc. London, 187 1, p. 315.

This genus is not closely allied to any other. Mr Waterhouse alluded to its
superficial resemblance to the Chilian genus Sclerostomus. Apterocyclus is however
distinguished from Sclerostomus by the absence of a labrum and the nature of the
mandibles, and it is really nearer to the widely distributed genus Dorcus. I have no
doubt that the species are all wingless.

The species of this genus are all confined to the island of Kauai. Very few
specimens are known of it, and it is most desirable that further information should be
obtained and published. At present I am obliged to distinguish seven forms as
species ; but it is possible that some of them may be merely varieties, and that A.femi-
nalis may be female of one of the other forms, all of which are known only in the
male sex.

(i) Apterocyclus waterhousei, sp. nov.

t Brevis, latior, pedibus crassis, mandibula dente crassa, haud acuminata, sed fere
oblique truncata ; sutura elytrorum ad apicem angulatim prominula. Long. corp.
sine mandib. 20 mm., lat. 11 mm.

Plate XI IL fig. I.

A single specimen of this remarkable insect is all that has been found. The
thorax is straight at the sides, with the hind angles much less rounded than in the
other species. The front tibiae are broad, strongly crenulate on their outer margin.
The middle and hind tibiae are remarkably thick, and have each a sharp denticle,
externally, below the middle.

The thick legs, and the angular apex of the elytra, will render this form un-
mistakeable. I have named it in honour of Mr CO. Waterhouse, who described this
interesting genus.

Hab. Kauai (Perkins).

(2) Apterocyclus munroi, sp. nov.

t Niger, opacus, epistomate elongatim prominulo ; elytrorum margine laterali alte
elevato ; tibiis anterioribus apicem versus latioribus, externe crenulatis, medio dente
parum prominulo, angulo apicali bidentato. Long. corp. sine mandib. \^\ — 18 mm.,
lat 8^ mm.

This species is very distinct by a number of structural characters. The mandibles
are slender, and in addition to the small tooth near the base, bear one or two very
minute tubercles, which are sometimes partly worn off, probably by attrition. The

464 FAUNA HAWAIlENSIS

epistome is much longer ; the head is comparatively narrow, the side not in the least
prominent in front of the eye ; mentum less transverse. Thorax less rounded at the
sides than it is \n A, varians. Side margin of elytra strongly elevated. The anterior
tibiae differently shaped (PI. XIII. fig. 3) from those of A. waterhousei and A. hono-
luluensis. The hind legs straighter, less dilated at the tips, and with more hair.
I am indebted to Mr G. C. Munro for this species. He found four specimens on
Kauai above Kaula in July, 1897.

Hab. Kauai (Munro as above).

(3) Apterocyclus adpropinqtmns, sp. nov.

$ Niger, opacus, epistomate elongatim prominulo ; elytrorum margine laterali
modice elevato ; tibiis anterioribus ad apicem acute bidentatis, praeterea fere muticis.
Long. 17 mm.

This differs from A. munroi, to which it is at first sight extremely similar, by the
more circular elytra with less elevated lateral margin, and by the shape of the front
tibiae (Plate XIII. fig. 4), which expand more abruptly at the tip and have the notch
between the two apical angles deeper, while above this they are almost unarmed on the
outer edge, there being only a trace of one tooth. Besides this the mandibles are
more slender, and their upper surface is less flat and less punctate. Only one specimen
has been found, and it remains to be seen whether the capture of more examples would
show it to be a variety of A. munroi,

Hab. Kauai : Makaweli, 2000 — 3000 ft., in May or June, 1894 (Perkins).

(4) Apterocyclus varians, sp. nov.

t Niger, subdepressus, opacus ; epistomate medio prominulo ; cantho oculari
distincto ; elytris margine laterali obsoleta ; scutello angusto apice fere acuminata ;
tibiis anterioribus apice lata, fere truncata. Long. corp. sine mandib. 14 — 18^ mm.;
lat. 7^ — 9 mm.

This is a rather variable species, one specimen having the head and thorax shining.
One small male, with the mandibles slender and bearing only a small tooth, approaches
A, feminalis. We have received nine specimens, and most of them are in very bad
condition, having apparently been found dead.

The type specimen has the elytra distinctly divergent at the tips ; the front tibiae
(PI. XIII. fig. 5) very broad, with the tip obliquely truncate though just perceptibly
emarginate, and the middle tibiae without any trace of a tooth on the outer margin.
The other specimens vary in these points ; in fact no two specimens are quite alike.

Hab. Kauai: Mounts Waimea, 5000ft. v. 1894 (6 specimens); Koholuamano,.
IV. 1895 (i specimen); 4000 ft. vii. 1896 (2 specimens) (Perkins),

COLEOPTERA 405

(5) Apterocyclus honolulttensis Waterhouse.

A, honoluluensis % Waterhouse, Tr. ent. Soc. London, 1 871, p. 315, fig. p. 316.

There being two species mixed under the name of A. honoluluensis (see deceptor),
Mr Waterhouse has selected the supposed female as the type of the species, it being
the individual he figured. It is however a male specimen. The following diagnosis
may help to its determination should it be ever again met with.

Niger, opacus, subdepressus, elytris rotundatis ; epistomate recte truncato, sat
elongato ; capite latissimo, cantho oculari sat prominulo ; tibiis anterioribus ad apicem
oblique truncatis ; tibiis posterioribus subrotundatis ; tibiis omnibus edentatis. Long.
\6\ mm.

Hab. Kauai : mountains, 4000 ft. (Harper Pease).

(6) Apterocyclus decepto7% sp. nov.

A, honoluluensis $, Waterhouse, Tr. ent. Soc. London, 1871, p. 316.

Niger, peropacus, epistomate medio leviter prominulo, fortiter punctato ; capite sat
lato, cantho oculari fere nullo ; prothorace margine parum arguta ; elytris marginibus
elevatis fere nullis ; tibiis anterioribus ad apicem oblique truncatis, intermediis externe
minute uni-denticulatis. Long. 14^^ mm.

When Mr Waterhouse described A, hoHolulue7tsis he was under the impression
that the differences between the two individuals before him were sexual. He has since
ascertained by dissection that both of them are certainly males, and that there is a
distinct difference in the genitalia of the two. The supposed male of the species is
therefore here characterised as a new species ; the only individual known being in the
national collection at the British Museum.

Hab. Kauai : mountains, 4000 ft. (Harper Pease, in Brit, Mus.).

(7) Apteivcyclus feminalis, sp. nov.

Minus depressus, piceus, subnitidus ; mandibuHs sat elongatis, edentatis; pro-
thorace punctulato, lateribus rotundatis, marginibus tenuibus ; tibiis anterioribus ad
apicem rotundato-truncatis. Long. corp. sine mandib. 14 mm., lat. 7|- mm.

Plate XHL fig. 2.

We have only a single individual to represent this form. It has to some extent
the characters of a female, but in others is more like a male. It may not improbably
be the female of A, adpropinquans. The mandibles are only sinuate on their inner
margins, and are more like those of a degenerate male than of a female Lucanid ; they
are widely separated, and there is no trace of a labrum between them. The terminal
ventral plate is longer than it is in the other forms.

Hab. Kauai: 4000 ft. July, 1896. Found under cow-dung (Perkins).

4o6 FAUNA HAWAIIENSIS

Fam. DERMESTIDAE.

Labrocerus Sharp.

Labrocerus Sharp, Tn Dublin Soc. iii. 1885, p, 148.

A correction should be made in my original description of the genus. The
prosternal process is not *' broad and flat," but delicate, narrow and feebly carinate
along the middle,

{a) Thorax with an abruptly defined basal lobe.

Elytra not marked with yellow, GrOUp 1, p. 406.

Elytra marked with yellow, or entirely yellow, Group 2, p. 408.

{b) Thorax with indefinite basal lobe.

Elytra not marked with yellow. Group 3, p. 409.

Elytra marked with yellow, or entirely yellow. Group 4, p. 410.

Group L

(i) Labrocerus moerens, sp. nov.

Niger, antennis articulis 3*^ et 4"^ flavescentibus; pubescens, elytris fascia maculisque
pubescentiae griseae plus minusve distincte ornatis. Long. 3^ mm.

Plate XIII. fig. 14.

This is a rather variable species in size, and in convexity, as well as in the
distinctness of the marks caused by the grey pubescence that exists on the elytra. In
the male the basal two joints of the antennae (PI. XIII. fig. 15) are small and black,
the third and fourth joints are small and yellowish, the next six joints are, each one,
decidedly transverse (the fifth joint though transverse is only slightly so), the terminal
joint is as long as the four preceding together, but is not broader than the tenth ; it
is very distinctly emarginate on the inner side, near the base, so as to give rise to a
slight appearance of curvation. In the female antenna (PI. XIII. fig. 15*3^), the club
is black, the ninth and tenth joints are short, transverse, the eighth is small, and from
this to the very small third joint the colour is yellowish, the first and second joints being
quite black. The prothorax is shining, but bears a good deal of pallid hair ; its basal
median lobe is large and considerably elevated. There is much granular sculpture at
the base of the elytra : the pubescence is well-marked, and some of it is grey, so as
to form one or more faint, very irregular, fasciae (a character that varies very much).
The legs are blackish, the apical parts of the tarsi strongly infuscate yellow. Thirty
specimens.

Hab. Kauai. Koholuamano ; Halemanu, 4000 ft. 1895; "^^s. Waimea, 4000 ft.
1894; high plateau, viii. 1896 (Perkins).

COLEOPTERA

407

(2) Labrocerus gravidus, sp. nov.

Niger, antennis sordide fulvis ; elytris pube grisescente plus minus variegatis.
Long. 3i— 4 mm.

Closely allied to Z. moerens but readily distinguished by the colour and form of
the antennae, which are much paler, and in the male more largely developed than they
are in L. moerens. The basal joint is piceous-yellow, the others yellow, more or
less dusky. In the male the third joint is very small, the fourth is more than twice
as large, sixth — tenth transverse, eleventh very long, about as long as the five
preceding it. In the female the antennae are very much like those of Z. moerens,
except for the pallid colour. The characters of the elytra and thorax are very much
those of Z. moerens. The legs are usually paler in colour. Eleven specimens.

Hab. Hawaii. Kilauea, vii. and viii. 1895, viii. 1896; Kona, 3000 ft. vi. 1892
(Perkins).

(3) Labrocerus simplex, sp. nov,

Niger, antennis flavescentibus, elytris pube fusco-nigra fere aequaliter vestitis.
i-ong. i\ mm.

This is smaller than L. gravidus, and the pubescence is darker and shows very
little trace of any pattern, and the male antennae are smaller with considerably shorter
terminal joint. Seven specimens.

Hab. Hawaii. Kona, 5000 ft. 30. vi. 1892; Kilauea, vii. 1895 and viii. 1896
(Perkins). ? Van from Maui, Haleakala, 3000 — 4000 ft. iv. 1894 (Perkins).

(4) Labrocerus concolor Sharp.

Labrocerus concolor Sharp, Tr. Dublin Soc. iii. 1885, p. 149.

Mr Perkins has found only one specimen of this species ; it is a female and agrees
well with the unique male on which I based the species. It is robust with a very
shining thorax ; the elytra have much granular punctuation at the base, the pubescence
is darker than in most of the other forms, and there are no fasciae on the elytra.

Hab. Hawaii, Kilauea, viii. 1895 (Perkins).

(5) Labrocerus curticornis, sp. nov.

Niger, robustus^ convexus, late ovalis, sat nitidus, elytris fascia maculisque pubes-
centiae grisescentis, maris antennis articulis 2*" — 7™ testaceis. Long. 3|- mm.

Nearest to L. concolor, but with a well-marked development of the pale setosity,
and with the antennae of the male shorter than in the allied forms. We have only one
specimen. The apical joint of the antenna is shorter than in the other species of this

F. H. III. 53

4o8 FAUNA HAWAIIENSIS

group, and distinctly narrower towards its extremity, the penultimate joints are not so
strongly transverse. The pubescence on the middle of the thorax is black, at the sides
grey. The elytra are shining black, the post-basal fascia of grey pubescence and the
two spots behind the middle are quite definite, although the hairs forming them are
not dense. The tarsi are yellowish.

Hab. Oahu, Waianae Coast, i. 1901 {no. 780, Perkins).

(6) Labrocerus laticornis, sp. nov.

Niger, antennis articulis 3 — 6 pallidioribus ; elytris fasciis indistinctis pubescent iae
pallidae. Long. 2% — 3^ mm.

A small narrow form, with short broad antennae in the male ; in this sex the
intermediate joints of the antennae are only slightly paler, the fifth, sixth and seventh
joints are very short, transverse, eighth — tenth also very short, strongly transverse,
terminal joint large, as long as the four or five preceding joints together. The thorax
is shining, but bears some pallid hairs, the basal lobe is strongly developed. There is
a good deal of pale hair on the elytra, but it forms only ill-defined fasciae. The legs
are black. Two specimens.

Hab. Molokai, Pelekunu, x, 1893 (Perkins).

Group 2.

(7) Labrocerus jaynei Sharp.

Labrocerus jay nei Sharp, Tr. Dublin Soc. in. 1885, p. 148.

I assign to this species a series of 21 specimens found by Mr Perkins on various
occasions on the island of Maui. Certain of the specimens are small, narrow and
depressed in form, and have the yellow marks on the elytra more or less reduced in
extent. In more convex specimens the yellow marks may be much more extensive,
and in one or two the front part of the thorax is red.

Hab. Maui, Lanai. — Maui: Haleakala, 5000 ft. v. 1896; Olinda, 3000 — 4000ft.
V. 1896. — Lanai, 3000 ft. 11. 1894 (Perkins).

(8) Labrocerus obscurus Blackburn.

Labrocerus obscm-us Blackburn, Tr. Dublin Soc. in. 1885, p. 149.

The type in the British Museum is in a very dirty state, but I believe it will
prove to be a species very closely allied to L. jaynei,

Hab. Hawaii; Mauna Loa, about 6000 ft. found by beating dead branches
(Blackburn).

COLEOPTERA 409

(9) Labrocerus sp.

A single specimen found at Waimea, Kauai, belongs apparently to a species very-
near L, jaynei, or rather to some of the varieties of that species. It is a female and
has an additional red mark in the form of a small spot on each side of the scutellum.

Hab, Kauai, Waimea (Perkins).

Group 3-

(10) Labrocerus obsoletus, sp. nov.

Niger, antennis pedibusque flavis, thorace rufescente, elytris testaceis, vage fulvo-
signatis, sutura anguste nigra. Long. 4 mm.

We have three females of this species which is readily distinguished from all
others of this section by its colour. It is of rather elongate form and has only obsolete
sculpture. The elytra are pallid, but bear evidence of the black colour of other species
in the form of vague or obsolete darker places ; there is a pallid pubescence, and but
little black seto^ity. The entirely pale legs contrast with the rest of the colour of the
under surface.

Hab. Maui, Haleakala, 4000 ft. v. 1896 (Perkins).

(11) Labrocerus dasytoideSy sp. nov.

Niger, antennis articulis 2"* — 3^ vel 2"" — 5° testaceis ; supra crebre evidenter punctu-
latus, nigro-setosus, elytris pubescentia grisea vix perspicue ornatis. Long. 3 — 3^ mm.

The male has thick antennae, with joints four — ten distinctly transverse, the
eleventh joint thick, as long as the four preceding together. The number of joints
that are yellowish varies a little, but is usually greater in the female than in the male,
but the club is always quite black. Seventeen specimens.

Hab. Kauai. Makaweli, 2000 ft. vi. and vii. 1894; Koholuamano, 4000 ft. iv.
1895; mts. Waimea, 3000 ft. v. 1894; high plateau, viii. 1896 (Perkins).

(12) Labrocerus vestitus, sp. nov.

% Niger, antennis 2"" — 9"" flavis; supra crebre subtiliter punctatus, griseo-setosus.
Long. 3!^ mm.

Apparently closely allied to Z. dasytoides, though looking different on account of
the pallid setosity, by which character and the paler antennae it is readily distinguished.
Two specimens.

Hab. Hawaii. Kona, 4000 ft. 26. vi. 1892 ; and Kilauea, viii. 1895 (Perkins).

53—2

4IO ' FAUNA HAWAIIENSIS

(13) Labrocerus flavicornis, sp. no v.

% Niger, minus convexus, antennis flavis articulo basali piceo, pedibus fusco-
testaceis ; subtiliter punctatus, breviter griseo-pubescens. Long. 3^ mm.

A single female is all we have to represent what is clearly a distinct species, and
probably allied to Z. vestitus. It differs markedly by its clear yellow antennae, which
are provided with a smaller, less compact, club than usual. The much shorter, and
less conspicuous clothing of the upper surface may, in part, be due to attrition.

Hab. Hawaii, Kilauea, viii. 1896 (no. 656, Perkins).

Group 4.

(14) Labroceriis setosus, sp. nov.

% Niger, longius pallido-setosus, elytris fascia post-basali maculisque ante apicem
pallidis, antennis articulis 2"* ad 6"" pallidis. Long. 3f mm.

Distinguished from the following species by its larger size, black legs, and by the
fact that there is much black hair mixed with the pale pubescence. Two specimens.

Hab. Oahu (Perkins).

(15) Labrocerus pallipes, sp. nov.

Niger, convexus, pallido-setosus, antennis pedibusque pallidis, elytris fascia post-
basali maculisque ante apicem pallidis. Long. 3 — 3^ mm.

This species varies in colour, the black being sometimes much reduced, so that
the under surface, and even the front of the thorax, may be largely pallid. The
antennae of the male are not very thick, so that joints eight — ten are not strongly
transverse, the terminal joint is about as long as the four preceding together. Four
specimens.

Hab. Molokai, 3000 ft. 24, vi. 1893 (Perkins).

(16) Labrocerus affinis, sp. nov.

Niger, parum convexus, antennis testacei^ clava fusta, tibiis tarsisque fusco-
testaceis ; pallido-setosus, elytris fascia post-basali maculisque ante apicem testaceis.
Long. 2f — 3I mm.

The antennae of the male of this species are rather more slender and a little
longer than usual, so that the penultimate and antepenultimate joints are scarcely —
if at all- — transverse. This, and the more slender form of the insect, distinguish it from
L, pallipes. Eleven specimens,

Hab. Oahu, Mokuleua, iv. and v. 1901 (Perkins).

COLEOPTERA

411

(17) Labrocerus quadrisignatus, sp. nov,

% Niger, parum convexus, pubescens, antennarum basi tibiisque rufis, tarsis sor-
didis ; elytris signatura post-basali maculaque ante-apicali testaceis. Long. 3^ mm.

Resembles Z. jaynei, but is readily distinguished by the obscure separation of the
basal lobe of the thorax. We have only females. The upper surface has much setosity.
The punctuation is fine and rather indistinct, but is nevertheless a true, impressed
punctuation. Five specimens,

Hab. Maui, Haleakala, 4000 — 5000 ft. v. 1896 (Perkins).

(18) Labrocerus suffusus, sp. nov.

? Niger, pallido-setosus, parum convexus, antennarum basi, pedibus elytrisque
testaceis, his ad basin late ad suturam anguste nigris. Long. 3-!^ — 3! mm.

Distinguished from all the other species of this group by the yellow colour of the
elytra, in which respect it resembles L. obsoletus of the preceding group. The legs
have both the tarsi and femora much infuscate and the club of the antenna is quite
black. There are some black hairs on the margins of the elytra. There is a fine,
rather distant punctuation on the upper surface, but on the elytra this is very indistinct
except at the base. Two specimens.

Hab. Maui, Haleakala, 5000 ft. v. 1896 (Perkins).

Argocerus, gen. nov.

Z Antennae clava magna oblonga, biarticulata, articulo ultimo praesertim grande,
articulis 3*='— 9"^ minutis. Palpi maxillares breves, crassi.

This genus is closely allied to Labrocerus, but with very different antennae in both
sexes : the terminal joint being elongate, the tenth joint large and coadapted with the
terminal one to form a two-jointed club, while the preceding joints are minute and
difficult to count.

(i) Argocerus similaris, sp. nov.

Sat convexus, niger, pubescentia sat elongata vestitus, elytris fasciis duabus pubes-
centiae pallidae discretis ; antennis articulis 9° et 10'' testaceis, clava biarticulata fusco-
nigra. Long. 2\ mm.

This has a great similarity to Labrocerus moerens. The upper surface is covered
with a dense, indefinite sculpture rendered more obscure by the clothing of hairs ;
the thoracic lobe is well developed. In the male the terminal joint of the antenna
(Plate XI H. fig. 16) is oblong, three times as long as broad, and the ninth joint is about
as long as broad, and almost as broad as the terminal joint, thus forming a great

412 FAUNA HAWAIIENSIS

contrast to the minute ninth joint In the female the club is much smaller, but is also
two-jointed, the terminal joint being rather longer than. broad, the tenth about as long
as broad. Ten specimens.

, There is one specimen (Halemanu, 4000 ft. v. 1895), of rather larger size and
more shining : approaching in fact A. subguttatus,

Hab. Kauai. Mts. Waimea, 3000 — 4000 ft. v. 1894 ; Halemanu, 4000 ft. v. 1895
(Perkins).

(2) Argocerus subguttatus, sp. no v.

Convexus, niger nitidus, pube minus dense vestitus, elytris maculis quatuor testaceis
vix discernendis, fasciis duabus pubescentiae pallidae, antennis pedibusque sordide
testaceis, illis clava nigra. Long. 3^^ mm.

Apparently closely allied to A, similaris but distinguished by its larger size, more
shining surface, with less punctuation and pubescence, and by the rather more slender
club of the antennae. The reddish marks on the elytra are probably variable. We
have only two specimens, both females.

Hab. Kauai, mts. Waimea, 4000 ft v. 1894 (Perkins).

EocERUS, gen. nov.

Corpus depressum. Antennae parvae, clava biarticulata. Palpi maxillares breves,
articulo ultimo lato. Prosternum processu brevissimo. Coxae intermediae sat distantes,
canalicula inter eas subobsoleta. Lamina coxarum posteriorium sat magna.

Only the female is known of this genus. The insect somewhat resembles a flat
Labrocerus, but is quite distinct on account of the very imperfect groove for the
reception of the prosternal process, which itself is so minute as to be difficult to detect.
The process scarcely projects behind the front coxae and the slight groove on the
mesosternum is not for the reception of the process but merely a guide to it during
motion.

The female of the genus Argoce7^us is adequate for establishing the status of the
genus Eocerus, as it also has the prosternal process obsolete ; but in it the mesosternum
has a definite grove, and the coxae are more approximate, and the breast less deplanate.
The female of Argocerus has, too, a large tenth joint of the antenna, Eocerus a small
one.

(i) Eocerus depressus, sp. nov.

% Depressus, niger, pube brevi vestitus, antennis testaceis clava fusca, tarsis fusco-^
testaceis ; prothorace subtiliter granulato, elytris crebre punctatis. Long. 3^ mm.

Antennae about as long as the thorax, terrninal joint rather large, pointed oval^
truncate at the base, tenth joint very short about as broad as the terminal one, third —

COLEOPTERA 413

ninth joints very minute, thorax sinuate at the base, so that the middle is longest, but
without definite lobe, the surface rather evenly covered with a fine granular sculpture.
Elytra with an irregular but distinct punctuation, shining. Three specimens.

Hab. Kauai, high plateau, viii. 1896 (Perkins).

Attagenus LatreUle.
Attagenus Latreille, Gen. Crust, et Ins. 11. 1807, p. 32.

(i) Attagenus plebeius Sharp.

Attagenus plebeius Sharp, Tr. Dublin Soc. iii. 1885, p. 147.

This species apparently varies greatly in the extent of the pale fascia of the elytra.

Hab. Oahu, Kauai.

Cryptorhopalum Gu6rin-Meneville.
Cryptorhopalum Guer., Ic. Regn. anim. Ins. 1838, p. 67.

(i) Cryptorhopalum terminate Sharp,
Cryptorhopalum terminale Sharp, Tr. Dublin Soc. iii. 1885, p. 150.
Hab. Oahu (Blackburn, Perkins) ; Maui (Perkins) ; Kauai (Blackburn) ; probably
all the islands.

(2) Cryptorhopalum brevicorne Sharp.

C brevicorne Sharp, I.e.

Mr Perkins has found three or four specimens only. They apparently vary
greatly, so that I am not sure that all are one species.
Hab. Oahu (Blackburn) ; probably all the islands.

Dermestes Linnaeus.
Dermestes Linnaeus, Syst. Nat. ir. 1767, p. 561.

(i) Dermestes cadaverinus Fabricius.
Dermestes cadaverinus Fabricius, Syst. Ent, p. 35.
Hab. All the islands.

(2) Dermestes vulpinus Fabricius.
Dermestes vulpinus Fabricius, Spec. Ins. i. p. 64.
Hab, All the islands.

414 FAUNA HAWAIIENSIS

Fam. COCCINELLIDAE.

An uncertain number of species of this family have been introduced to Hawaii
for economic purposes since the time when Mr Blackburn formed his collections. I
can give no information as to these introduced forms. They do not appear to have
affected their anciently established congeners, as these apparently hold much the same
position at present as they did 30 years ago.

Cycloneda Crotch.
Cycloneda Crotch, Cat. Coccinellidae, p. 6, and Revision of Cocc, 1874, p. 162.

(i) Cycloneda abdominalis, Say.

Coccinella abdominalis Say, Journ. Ac. Philad. iv. 1824, p. 95.
Neda abdominalis Sharp, Tr. Dublin Soc. iii. 1885, p. 236.
Neda oculata (Fabr.), Mun. Cat. xii. p. 3770.

Hab. Kauai, Oahu, Maui, Lanai, Hawaii. — Kauai, Oahu and Maui (Blackburn). —
Maui, Lahaina ; Lanai, 2000 ft. ; Hawaii, Kona, 2000 and 3000 ft. (Perkins). — North
America and Mexico.

ScYMNUS Kugelanh.
Scymnus Kugelann, Schneid. Mag. i. 1794, p. 545.

(i) Scymnus vividus Sharp.

Scymnus vividus Sharp, Tr. Dublin Soc. in. 1885, p. 146.

Hab. Oahu, Maui, Molokai, Lanai, Hawaii. — Maui, Hawaii, Oahu ; generally
at roots of herbage (Blackburn). — Oahu, Waianae mts. ; Maui, Lahaina and Haleakala,
over 5000 ft. ; Lanai, coast and 3000 ft. ; Molokai ; Hawaii, Kilauea, and Kona,
4000 ft. (Perkins).

(2) Scymnus ocellatus Sharp.

Scymnus ocellatus Sharp, Tr. Dublin Soc. in. 1885, p. 147.
We have received fifteen specimens.

Hab. Oahu, Maui, Lanai. — Oahu and Maui, generally found on flowers (Black-
burn).^ — Oahu, Kaala mts. over 2000 ft., &c. ; Maui, Lahaina ; Lanai, coast and 2000 ft.
.(Perkins).

(3) Scymnus discedens Sharp.
Scymnus discedens Sharp, Tr. Dublin Soc. in. 1885, p. 147.
We have received nine specimens.

Hab. Oahu (Blackburn); Waianae mts. 2000 ft., Kaala mts. 2500ft., Waialua
coast, (Perkins).

COLEOPTERA 415

Fam. EROTYLIDAE\

EuxESTUs WoUaston.
Euxestus Wollaston, Ann. Nat. Hist. 11. 1858, p. 411.

(i) Euxestus minor Sharp.

Euxestus minor Sharp, Tr. Dublin Soc. in. 1885, p. 145, and PI. IV. fig. 14.
We have received 7 specimens.

Hab. Probably found outside the Hawaiian Archipelago : within the latter only
known so far from Oahu (Blackburn) ; mts. near Honolulu, and Waianae mts,
(Perkins).

EiDOREUs Sharp.
Eidoreus Sharp, Tr. Dublin Soc. iii. 1885, p. 146.

(i) Eidoreus minutus Sharp.

Eidoreus minutus Sharp, 1. c.

The wings in this species are extremely transparent ; there is a more strongly
chitinised part, containing one or more nervures, along the anterior margin, extending
somewhat over ^ the length of the wing : there is also a nervure, running diagonally
from the base to a point on the hind margin somewhat over ^ the distance from base
to apex. No other nervures are visible. At the point where the diagonal nervure
touches the hind margin, the latter has a marked angular indentation. Just on the side
of this indentation, nearer to the base of the wing, is a brown pigmented patch. The
whole posterior margin bears moderately long hairs.

Hab. Oahu. Two specimens (Blackburn) ; also one specimen from Honolulu,
and one from the Waianae mts. (Perkins).

Fam. CORYLOPHIDAE\
Sacium Leconte.

Sacium Leconte, P. Ac. Philad. vi. 1852, p. 142; Matthews, Monograph of

Corylophidae, 1899, p. 40.
We have received specimens of a species of this genus. Comparison with the
species in the British Museum of Natural History, which include the collection formed
by Matthews, shows that these specimens cannot be placed in any described species.
The species undoubtedly belongs to this genus, for it has eleven joints in the antennae,
the eighth (just before the club) being very short and transverse ; and the mouth-parts
are of the type shown by Matthews in PI. I. figs. 4, 5 and 6 of his monograph.

1 By Hugh Scott.
F. H. III. 54

4i6 FAUNA HAWAIIENSIS

( I ) Saczum angusticollcy sp. no v.

Oblongum, convexum, sat angustum, nitidum, pubescentid pallida, subtiliter nee
densius punctatum, interstitiis laevis ; pronoto rufo, elytris nigris apiclbus piceo-ferru-
gineis, pedibus flavo-ferrugineis, antennis flavis clava obscuriore ; pronoto angusto, sat
elongato, antrorsum ovaliter rotundato, margine vix reflexa, basi baud fortiter sinuati,
angulis fere rectis, lined basali baud profunda* Long, f — 1-|- mm;

This species is distinguished by its small size ; by the fine punctuation and smooth
shining interstices; by the black elytra with no lighter colour except at the extreme
apex; and by the pronotum, which is red, paler in front, narrow, rather long, distinctly
narrowed in front, so that the outline forms an elliptic curve, with the margin hardly
reflexed.

Eight specimens. One specimen, from which the lower length measurement is
taken, is conspicuously smaller than all the others,

Hab. Hawaiian Is. Two specimens recorded from Oahu, one being from Kaala
mts. 2500 ft. ; the other six have no quite certain particulars, but are almost certainly
from Oahu (Perkins).

Anisomeristes Matthews.

Anisomeristes Matthews, Ent. Mo. Mag. xxii. 1886, p. 225 ; Mon, p. 108.
This genus is separated from Sericoderus chiefly by the antennae having eleven
joints, while those oi Seritoderus are ten-jointed. .

(i) Anisomeristes basalts] Sharp.

Sericoderus basalis Sharp, Tr. Dublin Soc. iii. 1885, p. 127.

Anisomeristes basalis Matthews, Mon. p. 112.

This is a somewhat broad form with conspicuous pubescence. It is of yellowish
colour, with the basal parts of the elytra dark ; in the specimens found by Blackburn
this portion is black, but in two specimens (both unfortunat-ely in bad preservation)
received from Mr Perkins, it is less dark, in one being only somewhat infuscated. The
terminal dorsal segments of the body are dark.

Hab. Oahu. From the salt marshes in the plains (Blackburn). No particulars
as to locality (Perkins).

Sericoderus Stephens.
Sericoderus Stephens, 111. Brit. Mand. 11. 1829, p. 187; Matthews, Mon. p. 115.

COLEOPTERA

417

(i) Sericoderus pubipennis Sharp.

Sericoderus pubipennis Sharp, Tr. Dublin Soc. iii. 1885, p. 128; Matthews, Mon.
p. 121.

We have received seventeen specimens. The colour varies somewhat, from
lighter and more yellow to ferruginous more or less infuscate. The clubs of the
antennae are usually infuscate. There is also variation in size, the length being from
about I to I mm.

Hab. Oahu, Maui, Lanai, Hawaii. — Oahu : various mountain localities (Black-
burn) ; Kaala mts. 2500 ft.; Waianae mts., beaten from dead Koa branches, 2000 —
3000 ft. (Perkins). — Maui : various mountain localities (Blackburn).— Lanai : 2000 ft.
(Perkins).— Hawaii : Kona, from Kukui trees 2500 ft,, from fungi about 4000 ft.
(Perkins).

CoRYLOPHODES Matthews.
Corylopkodes Matthews, Ent. Mo. Mag. xxii. 1885, p. 160, Mon. p. 145.
Ex parte Corylophus Sharp, Tr. Dublin Soc. in. 1885, p. 127.

(i) Corylopkodes rotundus. Sharp.
Corylophus rotundus Sharp, 1. c.
Corylopkodes rolundus M^tth^ws, Mon. p. 156.
We have not received this species from Mr Perkins.
Hab. Oahu. Near Honolulu (Blackburn).

(2) Corylopkodes suturalis, Sharp.
Corylopkus suturalis Sharp, 1. c. .

Corylopkodes suturalis Matthews, Mon. p. 157,
We have not received this species from Mr Perkins.

Hab. Oahu. '\ Occurs at roots of grass on the Nuuanu Pali/' 2000 ft. (Blackburn).

Orthoperus Stephens.
Ortkoperus Stephens, 111. Brit. 11. 1829, p. 186; Matthews, Mon. p. 180.

Ortkoperus aequalis Sharp.

Ortkoperus aequalis Sharp, Tr, Dublin Soc. in. 1885, p. 128; Matthews, Mon.

p. 194.
Comparison of this species with others of the genus in the British Museum shows
that it is distinguished by its form being a narrow, elongate oval ; by the numerous
distinct punctures ; by the whole surface being finely alutaceous ; and by the colour

S4--2

41 8 FAUNA HAWAIIENSIS

which is not dead black, but a kind of pitchy, with a certain amount of yellowish, so
to speak, showing through. A few specimens are decidedly lighter; one, probably
immature, is yellow. The legs are yellowish, the antennae the same with the club
infuscate. Length about f mm. There is slight variation in size ; the specimen originally
described is rather small. Thirty-nine specimens.

Hab. Hawaii, Maui. — Hawaii : Mauna Loa, about 4000 ft. (Blackburn) ; Kona,
4CMDO ft. and over, some recorded from dead wood and from fungi on Koa tree (Perkins). —
Maui : Haleakala 5000 ft., four specimens (Perkins).

Fam. MYCETOPHAGIDAE ( = TRITOMIDAE)\
LiTARGUS Erichson.
Litargus Erichson, Nat. Ins, iii. 1846, p. 415.

Subgenus Alitargus Casey.

Alitargus Casey, J. N. York Ent. Soc. viii. 1900, p. 136.

Pubescence confusedly arranged, without widely separated series of longer semi-
erect hairs. Epipleurae strongly concave, deeply descending. Epistoma trapezoidal.
Pronotal punctures simple. Last antennal joint elongate, the tip obliquely and recti-
lineally truncate.

(i) Litargus balteatus Leconte.

Litargus balteatus Leconte, P. Ac. Philad. 1856, p. 14.

Alitargus balteatus Casey, I. c.

We have received several specimens which agree closely with Casey's description
(1. c), and also with specimens in the British Museum determined by Dr Sharp as
L, balteatus (Biol. Centr.-Am, 11. i, p. 639). The Hawaiian specimens exceed in size
the typical Z. balteatus as described by Casey, and in this and other respects seem to
come close to the van transversus Lee, even if they are not identical therewith.

The form is rather parallel-sided, not tapering much posteriorly. Convexity
moderate. Sinuations in the base of the prothorax small but evident ; in front of each
of them is a very vague depression on the posterior part of the disc. Pubescence
yellowish, conspicuous. In the larger specimens (of the transversus form) the colour
is piceous or black, with pallid testaceous markings, which vary somewhat in arrange-
ment, on the elytra ; usually there is a conspicuous humeral and post-scutellar light
area, and a transverse post-median band. There is a small patch of paler pubescence
on the sloping sides of the elytra anteriorly, a litrie behind the humeral light area.
Clubs of the antennae dark.

Some specimens are rather smaller and lighter, being rufo-piceous with the pallid
markings variable. One of these is more tapering posteriorly than the rest. I can

1 By Hugh Scott

COLEOPTERA 419

however find no character clearly separating them from the larger specimens ; probably
they approach more to the typical form of the species* Specimens very much the same
in colour were included by Dr Sharp as L, balteatus. Legs testaceous. Antennae
usually darker. Length 2 — 2\ mm. Eleven specimens.

Hab. Lanai, Maui, Hawaii. — Lanai: 2000 ft, several ** near Ko^le." — Maui:
Haleakala, 4000 — 5000 ft. — Hawaii: Kona, 3000 ft. (Perkins). — North America,
Central America (see Sharp, 1. c).

Subgenus Litargellus Casey.

Litargellus Casey, J. N. York Ent. Soc. viii. 1900, p. 136.

Pubescence confusedly arranged, without widely separated series of longer semi-
erect hairs. Epipleurae strongly concave, deeply descending. Epistoma trapezoidal.
Pronotal punctures minute, slightly elevated, subannulate. Last antennal joint short,
broadly arcuato-truncate at apex.

(2) Litargus vestztm Sharp.

Litargus vestitus Sharp, Tn Ent. Soc. London, 1879, p. 88.

There seems little doubt that this species belongs to Casey's subgenus Litargellus,
though the terminal joints of the antennae might perhaps be better described as broadly
acuminate apically. In other respects it closely agrees with the definition of the sub-
genus. The suture between epistome and frons is very obsolete.

The species is characterised by its regularly oval form, the thorax narrowing in
front, and the elytra behind, so as to form a perfectly continuous outline. It is also
characterised by the dark ferruginous colour, with warm testaceous markings on the
elytra. The legs and antennae are yellowish, the clubs of the latter sometimes very
slightly darker. Sinuations in the base of the pronotum small but evident ; no depres-
sions visible on the pronotum. Length i| — 2 mm.

Nine specimens received from Mr Perkins.

Hab. Oahu, Lanai, Hawaii. — All three islands: in bark at considerable elevations
(Blackburn). — Oahu: Waialua ; Waianae mts. 2000— 3000 ft. ; Kawailoa gulch; near
Honolulu. Several times recorded as obtained by beating, from dead Koa branches,
native apple tree, &c. (Perkins).

Typhaea Kirby.
Typhaea (Kirby) Stephens, 111. Brit. iii. 1830, p. 70.

(i) Typhaea fumata Linnaeus.
Dermestes fumatMS Linnaeus, Syst. Nat. i. 2, p, 564; Sharp, Tr. Dublin Soc. iii.
1885, p. 235.

Hab. Oahu, Maui (Blackburn, Perkins). Cosmopolitan.

420 FAUNA HAWAIIENSIS

Propalticus Sharp.

Propalticus Sharp, Tr. Ent. Soc. London 1879, pp. 88, 89.

A description of the generic characters, taken from P, oculatus, is given here, as the
original des(!ription was not quite complete, and was incorrect as to the form of the
antennae and the number of tarsal joints.

The antennae (Plate XVI. fig. 13) when mounted in balsam and examined under a
high power are seen to be very remarkable. They are 15-jointed (or 14-jointed, if the
terminal part of the club is regarded as only one joint). Basal joint very short : joints
2 and 3 large, each about twice as long as broad : joints 4 — 9 very slender, subequal,
the proximal one the longest. Joint 10 is large, broad, dark-coloured: 11 is light-
coloured, slender but with a broad base, the slender part arising right at one side of the
distal surface of joint 10. Joint 12 is a large dark joint of the same nature as 10, and
13 is a slender light joint repeating the characters of 11. Joint 14 is a dark broad piece
much like 10 or 12 : 15 is also dark, rounded apically, and curiously excavated on one
side, so as to present a very singular form : line of division between 14 and 15 not so
well-marked as that between other joints of the antenna.

Eyes large, not very prominent, encroaching greatly on the upper surface of the
head. No transverse suture marking off the epistome from the frons and vertex.
Labrum large, distinct, transverse, rounded in front, leaving the points of the mandibles
exposed. Mandibles with a large basal portion, and a rather slender apical portion ;
the latter is trifid at the extremity, two points being visible from above, a third from
below. Maxillae with a rather large, pubescent outer lobe, and an extremely slender
inner lobe : palpi stout, 3-jointed ; apical joint not at all dilated, about three times as
long as broad ; middle joint about as long as broad ; basal joint rather stouter. The
labium, mounted in balsam, shows the following characters. The mentum is a transverse
piece : the ligula is a single piece, but with indications of a median division anteriorly ;
its front margin is entire, nearly straight. Labial palps 3-jointed ; basal joint minute,
nearly as broad as long ; second and third joints much stouter, the second considerably
longer than broad, the third more than twice as long as broad and tapering distally, but
with actual apex blunt. Prosternum large ; coxae placed at its hind part, very widely
separated, small, with an extension in the anterior and outward direction, their cavities
not closed behind. Mesosternum broad and transverse : middle coxae globose, widely
separated. Hind coxae transverse, very widely separated. Ventral segments five, the
basal one as long in the middle as the two following. Elytra covering the body.
Epipleurae almost flat, sloping somewhat.

Dr Sharp (op. cit. p. 90), though doubtful, considered that the tarsi were probably
4-jointed. Canada Balsam preparations show, however, that they are undoubtedly
5-jointed. They are filiform, the first four joints short and subequal in length, the
terminal joint nearly as long as the other four together. Legs slender; front tibiae

COLEOPTERA 421

longer than the other two pairs, and each with an articulated spur (Plate XVL fig. 14)
below the tarsus, as long as the four basal joints of the tarsus. The other tibiae ar^
devoid of such spurs. The fact that the tarsi are 5-jointed, and the form of the
antennae, make the systematic position of this genus quite doubtful. It is here retained
merely provisionally in Mycetophagidae.

(i) Propalticus oculatus Sharp.

Propalticus oculatus Sharp, op. cit. p. 88.

Plate XVI. fig. X2. ^

We have received seven specimens of this remarkable little beetle. The general
colour above is a very dark ferruginous. The punctures are close but not very marked.
The expression in the diagnosis '' fere nudus " seems hardly correct ; for the body is
covered with a very short decumbent pubescence, inconspicuous except over certain
patches near the base of the thorax and on the elytra, where the hairs are very pale.
The legs are testaceous,

Hab. Oahu, Maui, Hawaii,— Oahu, Maui; also stated (Sharp, op. cit. p. 89) to
have occurred in Kauai ; in dead wood in all kinds of localities ; it is an extremely agile
jumper (Blackburn), — ^Oahu : Kaala mts. ; mts. near Honolulu (Perkins), — Hawaii,
Kona, 2500 ft. (Perkins),

Fam. MYCETAEIDAE.

Mycetaea Stephens.
Mycetaea Stephens, 111. Brit, iii. 1830, p. 80,

(i) Mycetaea hirta, Marsh.

Silpka hirta Marsham, Ent. Brit. i. p. 124.

Mycetaea ktrta Sharp, Tr. Dublin Soc. iii, 1885, p. 235.

Mr Perkins has not obtained this species.

Hab. Oahu, A single specimen taken in the Pauoa valley near Honolulu
(Blackburn). Introduced.

Fam. LATHRIDIIDAE\

Lathridius Herbst.
Lathridius Herbst, Kaf. v. 1793, p. 3.

(i) Lathridius nodifer Westwood.

Lathridius nodifer V^^sVNOod, Int. Class. Ins. i. p. 155 and PI. 13, fig. 23 ; Sharp,
Tr. Dublin Soc. in. 1885, p. 234.

^ By Hugh Scott.

422 FAUNA HAWAIIENSIS

Hab. Oahu, Mam, Lanai, Hawaii, — Oahu and Hawaii, at considerable elevations
(Blackburn). — Hawaii, Kona, 4000 ft. ; Maui, Haleakala, 5000 ft. and over ; Lanat
3000 ft. (Perkins). Widely distributed over the world,

CoLovocERA Motschoulsky.
Cholovocera Motschoulsky, Bull Mosc. 11. 1838, p. 177 \^ = Coluocera, Mun. Cat. iii,
p. 905].

(i) Colovocera maderae Wollaston.

Colovocera maderae Wollaston, Ins. Mader. p. 180 and PL X. fig. i.

We have a single Colovocera from Oahu. A comparison of it with the type of
C maderae Woll. shows no character clearly separating the two specimens. The Oahu
specimen is distinctly larger and paler, being a pale yellowish-testaceous. The elytra
are decidedly acuminate apically, but so are those of the type, which I consider is
represented rather too broad and rounded posteriorly in Wollaston's figure.

In all structural characters the specimens agree. The head is large and broad; the
eyes lateral, consisting each of six separate facets, with some dark pigment lying between
and apparently under some of them. The prothorax is short and broadest at the base.
A few punctures can just be made out on the elytra under a high power. The prosternal
process is prominent, broadened and not bent up posteriorly. The mesosternum
consists of a short transverse piece, transversely concave, cut off straight in front (before
this is a sloping portion with two shallow impressions receiving the front coxae) ; the
metasternum has two striae curving round behind the middle coxae, and the first
abdominal segment has two diverging striae curving behind the hind coxae.

The elytra are not soldered together, but examination has revealed absolutely no
trace oi wings ; moreover the metanotum as a firmly chitinised piece does not exist, but
is entirely membranous. I have examined several specimens of Colovocera formicaria
Motsch., and found in all respects the same condition in all of them.

Hab. Oahu, mts. near Honolulu 1900 (Perkins). Madeira, in ants' nests (see
Wollaston, 1. c). In the British Museum is a series of specimens from ants' nests, from
Port Darwin, Australia, of the same pale colour as our specimen.

Fam. CRYPTOPHAGIDAE.
Cryptophilus Reitter.
Cryptophilus Reitter, Verb. Zool.-bot. Ges. Wien, xxiv. 1874, p. 381.

(i) Cryptophilus integer Heer.
Telmatophilus debilis ShscX"^, Trans. Dublin Soc. iii. 1885, P* ^45*
This little insect has now been identified as above, and I believe correctly. It is a
Widely distributed form, and of no interest in our Fauna.
Hab. Oahu (Blackburn) ; Honolulu (Perkins).

COLEOPTERA 423

Henoticus Thomson,
Henoticus Thomson, Skand. Col. x. p. 67.

(i) Henoticus serratus, Gyllenhal
Cryptophagus serratus GylL, Ins. suecica, i. p. 171.

Dr Perkins informs me that he met with this insect at Kilauea, Hawaii, in the wet
forest at an elevation of about 4000 feet ; but I have not seen any of his specimens.

Hab. Oahu and Maui (Blackburn), Hawaii (Blackburn and Perkins).

Fam. CUCUJIDAE.

Brontolaemus Sharp.
Brontolaemus Sharp, Tn Dublin Soc. iii. 1885, p. 142.

(i) Brontolaemus elegans Sharp.

Brontolaemus elegans Sharp, Tr. Dublin Soc. in. 1885, p. 142, PI. IV. fig. 16.

This was described by me from a pair presumed to be from the island of Oahu.
Mr Blackburn stated that the species also occurred on Kauai, but all the Kauai examples
I have seen are markedly different from those found on Oahu. I have no doubt therefore
that the original types are both from Oahu. At the same time I must say that I have
seen no example that agrees anything like completely with my male type ; it iS remarkably
small, and has the punctures on the striae of the elytra unusually large. The figure,
loc. sup. cit., is inexact in several particulars, especially as regards the mandibles, and the
striation of the elytra. The type of the female is well matched by examples found by
Mr Koebele, and which I have called van koebelei The male may probably be assigned
to the Honolulu form of the species as an aberrant and worn example. I have now
before me in all a series of twenty-seven examples that I assign to B, elegans, they were
collected at various times by Mr Perkins, as well as by Mr Koebele and Mr Blackburn.
Unfortunately most of them are without locality tickets and there are only four males in
the whole series. They exhibit a great deal of variation.

I have already said that I have no specimen that tallies with the original male type ;
sixteen females agree sufficiently with the female type to treat them as B. eleganSy
though they exhibit much variation. The six other females and the four males belong
to a larger form as below.

Hab. Oahu. Wakiawa, iv. 1901 ; Honolulu, 2000 — 3000 ft. v. 1896 (Perkins).

F. H. Ill 55

424 FAUNA HAWAHENSIS

Brontolaentus elegans var. koebelei, var. nov.

Fusco-ferrugineus, setis depressis albicantibus ornatus, sat variegatus, corpore
subtus evidentius reticulatim sculpturato ; antennis elongatis, maris fere absque
pubescentia. Long. 3 — 3I- mm.

Agrees with B, elegans typ. in most characters, but the individuals are rather larger
than, and have considerably longer antennae. The sculpture of the undersurface is very
strong.

Hab. Oahu, Waianae mts. 3000 ft. 11. 1897 (Perkins).

(2) Brontolaemus currax, sp. nov.

Nigricans, antennis pedibusque fusco-rufis, illis elongatis apiceni versus nigricanti-
bus ; elytris bene variegatis. Long. 3^^ — ^4 mm.

Head broad, deeply, impressed in front, sculpture fine. Thorax large, much
narrowed behind, anterior angles distinctly prominent, front portion of the disc convex,
and with a slight impression at the summit. Black marks on the elytra numerous and
very distinct, scales very fine. The male has fine, long hairs on the undersurface of the
antennae from the fourth joint onwards.

The antennae in this species are longer than in any other species, being 6 or 7 mm.
long in each sex. Seven specimens.

Hab. Kauai. Halemanu, 4000 ft v. 1895 and vii. 1896 ; Koholuamano, iv. 1895
(Perkins).

Brontolaemus currax var. lanaiensis, var. nov.

Antennis elongatis, articulis tribus ultimis baud omnino gracilibus, singulo ad
apicem conspicuiter incrassato-nodoso.

These specimens from Lanai have the terminal three joints of the antennae less
elongate than the Kauai exponents, and each more knobbed and thicker at the tip.
There appears to be but little long hair on the undersides of the joints in the male.
The form therefore appears to be somewhat intermediate between the two species that
are found in Kauai. Twelve specimens.

Hab. Lanai, 2000 — -3000 ft. i. 1894; Haleapaakai, vii. 1894; mts. Koele,
2000 ft. IL 1894 (Perkins).

Brontolaemus currax var. mauiensis, var. nov.

Minor, gracilis, pallidior, antennis tenuibus, prothorace brevi. Long. 3 mm.
Two specimens from Maui may prove to be distinct. They have much flavescent-
grey clothing like B. currax lanaiensis, but are smaller and have a smaller thorax; there

COLEOPTERA 425

is hair on the male antennae and the sculpture of the undersurface is not so strong as it
is in B. elegans, which these specimens greatly resemble.
Hab. Maui, Lahaina, 2000 ft i. 1897 (Perkins).

(3) Brontolaemus nudicornts, sp. nov.

Fuscus, antennis pedibusque fusco-rufis, illis apicem versus nigricantibus ; minus
variegatus, prothorace fortiter transverso. Long. 3^ — 3^ mm.

This is easily enough distinguished by the fine, comparatively obsolete sculpture
and the comparatively slight variegation of the upper surface, due to the minuteness of
the scales ; the variegation that exists being chiefly due to the colour of the surface
itself. The thorax is unusually short and broad. I can find no trace of sexual hairs on
the antennae of the male ; they are much shorter than those of B. currax, and the
terminal joints are comparatively stouter and blacker at their tips. Two specimens.

Hab. Kauai. Mts. Waimea, 4000 ft. v. 1894 (no. 259) ; high plateau, viii. 1896
(no. 682, Perkins).

(4) Brontolaemus agilis, sp. nov.

Minus latus, nigricans, antennis rufo-nigris, pedibus nigro-rufis, supra squamulis,
griseis flavisque bene variegatus; antennis minus gracilibus, articulis ultimis tribus
minus elongatis et curvatis. Long. Z-^ik ^im.

This is the most distinct of the species. The antennae are stouter, with a shorter
terminal joint than any of the other species ; the form is narrower, the head is especially
narrower : the base of the thorax is quite straight, the hind-angles perfect rectangles ;
the colour throughout is blacker, the variegation of the elytra very conspicuous ; the
sculpture of the undersurface very obsolete; the tracery on the undersurface of the head,
very fine and dense. Twenty-six specimens.

There is an elegant variety in which the thorax and elytra have a broad red margin.

Hab. Maui. Haleakala, 5000 ft. iii. and iv. 1894; ^t^^d 5000 ft. v. — x. 1896
(Perkins).

Laemophlaeus Castelnau.
Laemopklaeus C^st^ln^u, Hist. Nat. 11. 1840, p. 385.

(i) Laemophlaeus minutus, Olivier.

Cucujus minutus Olivier, Enc. method, vi. 1791, p. 243 ; Ent. iv. 74 bis, p. 8. t. i.

f- 9> 1795 (iiGC L, minutus Sharp, Biol. Centr.-Am. Coleoptera, 11. (i), p. 518),
Cucujus pusillus Schonherr, Syn. Ins. iii. p. 55; Sharp, Tr. Dublin Soc. iir. 1885,

P- 233.

SS— 2

426 FAUNA HAWAHENSIS

This cosmopolitan species frequents foul rice. Blackburn records it as occurring in
the burrows oi Apate, but I fancy this observation must refer to a closely allied species,
several of which are known to be difficult to distinguish.

Hab. Oahu, Honolulu (Blackburn, Perkins).

This species was formerly called Z. pusillus, but it has recently been said to be the
Cucujus minutus of Olivier. If this should prove to be correct, the Central American
species described by me as Z. minutus will have to take another name.

Parandrita Leconte.
Parandrita Leconte, Smithsonian Misc. Coll. xxvi. 1880, p. 133.
Laemophlaeus (part.) Casey, Tr. Amer. ent. Soc. xi. 1884, p. 91.
Parandrita Sharp, Biol. Centr.-Amer. Col. 11. (i), p. 536,

(i) Parandrita aenea, Sharp.

Laemophlaeus aeneus Sharp, Tr. Dublin Soc. iii. 1885, p. 143.

Plate XIII. fig. 17.

Five specimens.

The name L. aeneus was preoccupied when I described this species, but as the
insect is now removed to another genus and no other specific name has in the interval
been proposed for it, the species may stand as Parandrita aenea.

Hab. Maui, Haleakala, 4500 — 5000 ft. v. and x. 1896 (Perkins).

(2) Parandrita konae^ sp. nov.

Depressa, nigra, supra viridi-aenea, pedibus rufis ; capite thoraceque crebre subti-
liter punctatis, hoc intra latus linea impressa; elytris subtiliter striatis interstitiis fere
omnino laevigatis. Long. 2f mm.

Extremely close to P. aenea, rather darker in colour, and with the striae of the
elytra finer, especially at the apex; the punctuation throughout is rather more obliterated.
The hind angles of the thorax are very obtuse. Five specimens.

Hab. Hawaii, Kona, 4000 ft. viii. 1892, and 3000 ft. iii. 1896 (Perkins).

(3) Parandrita perkinsi, sp. nov.

Depressa, nigra, supra aenea, pedibus rufis, antennis gracilibus ; capite thoraceque
fere dense punctatis ; elytris profunde striatis. Long. 2-J mm.

This has longer and more slender antennae than P, aenea. The punctuation on
head and thorax is finer, and the lateral lines on the latter are finer. On the other hand
the striae on the elytra are very definite, and are distinctly punctured. Two specimens.

Hab. Oahu (no. 903, Perkins).

COLEOPTERA 427

(4) Parandrita gracilis, sp. nov.

Angustior, depressa, nigra, supra laete aenea, nitida, antennis femoribusque piceis.
tibiis tarsisque rufis ; antennis apicem versus gracilibus ; crebrius subtiliter punctata ;
elytris striatis. Long. 2\ mm.

This is of narrower form than the other species so that the head is not transverse ;
the punctuation is unusually fine ; the striation of the elytra very definite. Unique.

Hab. Oahu, Konahuanui Ridge, xii. 1900 (no. 783, Perkins).

(5) Parandrita molokaiae, sp. nov.

Depressa, nigra, supra aenescens, elytris aeneo-rufis, antennis piceis, pedibus rufis ;
capite thoraceque crebre subtiliter punctatis, hoc intra latus linea impressa : elytris
striatis, interstitiis parce punctatis. Long. 3 mm.

In this species the elytra are of a dark mahogany colour, with only a faint aeneous
tinge and no trace of pallid marks. The elytra are deeply striated. There is much
hair on the male antennae, and the terminal three joints are rather longer than they
are in P, aenea. Three specimens.

Whether this and the allies may prove really distinct from P. aenea it is difficult
to say on so small a material. They appear to be very rare.

Hab. Molokai, 22. v. 1893 and 9. vi. 1893.

(6) Parandrita liturata, sp. nov,

Depressa, nigra, capite thoraceque subauratis, elytris fusco-nigris, testaceo-signatis,
antennis pedibus piceis, vel nigro-piceis. Long. 2\ — 3 mm.

This is readily distinguished by the variegate elytra, though in other respects but
little different from the other Hawaiian species of the genus. The head and thorax
are finely, very densely punctured, the thoracic line is very fine. The elytra are in
colour about half black and half yellow, the marks consisting of about five yellow
connected patches, the most distinct of which is one common to both elytra, placed
about half way of the length, and surrounded by black marks separating it almost,
but not quite, from the other yellow marks ; they are very distinctly striated, and bear
numerous extremely minute setae. Five specimens.

Hab. Maui, Hawaii.— Maui ; Haleakala, 5CX)0 ft. x. 1896.— Hawaii ; Kilauea,
IX. 1896 (Perkins).

PsAMMOECHUS LatreiUc.
Psammoechus Latreille, Regn. Anim. ed. 2, v. p. 135.

428 FAUNA HAWAIIENSIS

(i) Psammoechus insularis, Sharp;

Telephanus insularis Sharp, Tr. Dublin Soc. iii. 1885, p. 143.
This insect may prove to be not distinct from P. trimaculatus Motsch., an insect
distributed somewhat widely, and probably by commercial means.
Hab. Oahu, Kauai.

(2) Psammoechus pallidipennisy Blackburn.

Telephanus pallidipennis Blackburn, Tr. Dublin Soc. iii. 1885, p. 144.
The type in the British Museum appears to be a quite distinct species from
P, insularis,

Hab. Oahu ; the type was found near Honolulu (Blackburn).

Cryptamorpha Wollaston.
Cryptamorpha Wollaston, Ins. Mader. 1854, p. 156.

(i) Cryptamorpha desjardinsi Gu^rin-Meneville.
Psammoecus desjardinsii Gu^r., Ic. R^gn. An. Ins. p. 196.
Hab. On all the islands.

Cathartus Reiche.
Cathartus Reiche, Ann. Soc. ent. France, 1854, p. T"],

(i) Cathartus advena, Waltl.
Cryptophagus advena WaltL, Silb. Rev. ent. 11. p. 256.
Hab. Oahu. (and probably all the islands).

Silvan us Latreille.
Silvanus Latn, Gen. Crust, et Ins. iii. 1807, p. 19.

(i) Silvanus surinamensis^ Linnaeus.
Dermestes surinamensis Linnaeus, Syst Nat. ed. x. p. 357.
Hab. Oahu, Lanai (and probably all the islands).

(2) Silvanus unidentatus, Fabricius.
Dermestes unidentatus Fabricius, Ent. Syst, i. p. 232,
Hab. Oahu, Honolulu (Blackburn).

COLEOPTERA 429

Nausibius Redtenbacher. »
Nausibius Redtenbacher, Faun, austr. ed. 11. p. 998.

(i) Nausibius dentatus, Marsh.
Corticaria dentata Marsham, Ent. brit p. 108.
Hab. Oahu (Blackburn). Probably on all the islands.

MoNANUS Sharp.

Monanus Sharp, Tr. ent. Soc. London, 1879, p. 86.

Emporius Ganglbauer, Kaf. Mitteleur. iit. p. 586.

This genus is now known to be distributed by commercial means.

( I ) Monanus crenatus Sharp.
Monanus crenatus Sharp, t. c. p. 85.

Found by beating Pandanus, Nuanu Pali. Not met with by Perkins.
Hab. Oahu (Blackburn).

(2) Monanus brevicornis Blackburn.

Monanus brevicornis Blackburn, Tr. Dublin Soc. in. 1885, p. 143.

Found in decaying flowers of banana, Pauon valley. Not met with by Perkins.

Hab. Oahu (Blackburn).

[Fam. RHYSODIDAE.
Clinidium Kirby, ZooL Journ. v. 1835, p. 6.

(i) Clinidium lirattim (Newman) Chevrolat.

Rhyzodes liratus (Newm.), Chevr., Ann. Soc. ent. France, 1873, p. 388 ; Sharp,
Tr. DubHn Soc. iii. 1885, p. 232.

Hab. Brazil. ?Oahu. '* Honolulu," Chevrolat: not known to Blackburn or
Perkins. The recording of this species from the Sandwich Islands was quite possibly
due to an error : it was probably never taken there at all.]

Fam. COLYDHDAE.

Antilissus Sharp.

Antilissus Sharp, Tr. ent. Soc. London, 1879, p. 87.

The basal joint of the tarsus is much reduced, and in some aspects so concealed by
the end of the tibia that the tarsus appears only 3-jointed. This character allies the
genus to Labrotrichus Sharp (Biol. Centr.-Am. 11. i. p. 446) and to Distaphyla Pascoe
(see Sharp, 1. c).

430 FAUNA HAWAIIENSIS

(i) Antilissus aper Sharp.

Antilissus aper Sharp, op. cit. p. 86.

We have received about 80 specimens of this species, which is so far known only
from the Hawaiian Archipelago.

Hab. All the islands. Oahu, mountain localities (Blackburn) ; all the islands,
frequently from considerable elevations (Perkins). H. S.

MiNTHEA Pascoe.
Minthea Pascoe, Journ. of Ent. 11. 1863, p. 97.

(i) Minthea rugicollis, Walker.

Ditoma rugicoilis Walker, Ann. Nat. Hist. (3) 11. p. 206.

Eulachus hispidus Blackburn, Tr. Dublin Soc. in. 1885, p. 141.

The single specimen described by Blackburn as Eulachus hispidus has since been
shown by Arrow (Ent. Mo. Mag. 1904, p. 35) to belong to the species Minthea
rugicoilis,

Hab. Very widespread. Tropical Asia, &c. Near Honolulu, about 1000 ft.,
under bark (Blackburn). H. S.

CoLOBicus Latreille.
Colobicus Latreille, Gen. Crust, et Ins. 11. 1807, p. 9.

( I ) Colobicus parilis Pascoe.

Colobicus parilis Pascoe, Journ. of Ent. i. i860, p. 202.
Colobicus conformis Pascoe, Journ. of Ent. 11. 1863, p. 124.
We have received four specimens of this widespread species.

Hab. Tropical Asia, &c. Mts. near Honolulu (Perkins). H. S.

Derolathrus, gen. nov.

Antennae lo-articulatae, clava magna uniarticulata, coxae anteriores approximatae ;
intermediae fere contiguae ; posteriores distantes. Tarsi 4-articulati, articulis basalibus
tribus brevibus, primo occulto.

Front of head prolonged, covering the mouth parts ; without transverse suture.
Antennae (Plate XVI. fig. 10) rather short and stout, inserted under the lateral margins
of the head so that the basal joint is from above nearly concealed, it and the second
joint thicker than the following ; joints three — nine subequal rather stout, each broader
than long, ninth slightly broader than the eighth, tenth large, oval, forming an abrupt
club, and apparently consisting of three consolidated joints.

COLEOPTERA 431

Prothorax elongate ; the front coxae minute, globular separated by a slender
process projecting backwards a little beyond them. The middle coxae (Plate XVL fig. 1 1)
with small circular acetabula which touch one another. The metasternum is very elongate.
The abdomen consists of five ventral plates, the first to the fourth subequal in length,
the first a little the longer, the fifth about twice as long as the fourth.

Tarsi (Plate XVI. fig. 9) 4-jointed with the basal three joints short, inserted a little
above the tip of the tibia in an excavation so that the basal joint escapes observation.

The affinities of this minute beetle are very obscure. Notwithstanding its very
elongate form it has considerable resemblance to Holoparamecus of the division Mero-
physiini. The members of this group have however only three joints to the feet whereas
I am fairly certain that there are four in Derolathrus, I therefore place the genus in
Colydiidae. I have elsewhere expressed the opinion that the Merophysiini should be
associated with the Colydiidae, and Derolathrus lends additional support to this view.
I cannot see the parts of the mouth. D. S.

Derolathrus atomus, sp. nov.

Perangustus, subdepressus, testaceus, obsolete punctatus, estriatus. Long. corp.
f mm. lat. vix \ mm.

Plate XVI. fig. 8.

There is very little to describe about this tiny species. The body bears a few erect
short setae. The outline and proportions will be appreciated from the figure.

Two specimens ; and two others very much broken. There are unfortunately no
particulars as to its habitat.

Hab. Oahu (Perkins). D. S.

Fam. DISCOLOMIDAE\

Discolomidae Horn, P. Am. Phil. Soc. xvii. 1878, p. 556.

Discolominae Sharp, Biol. Centr.-Am. Col. 11. r. p. 495.

Pseudocorylopkidae Matthews, Mon. Corylophidae, London, 1899, p. 197.

Coxae omnes transversae, sed ex parte majore occultae ; tantum pars apicalis
globulosa aperta est.

The erection of a family Discolomidae was proposed by Horn to include the genera
Discoloma and Hyberis { — NotiophygMs), He states that the posterior coxae are
(apparently) completely closed in by the metasternum and first abdominal segment, the
metasternal side pieces not reaching them as they do in Colydiidae.

Dr Sharp (op. cit, p. 496) showed that Horn had taken quite an erroneous view of
the hind coxae. When the abdomen is dissected off, the superficial appearance is seen
to be quite deceptive. The coxae are really large, only the globular ending, where

^ By Hugh Scott.
F. H. III. 56

432 FAUNA HAWAIIENSIS

articulation with the trochanter occurs, is externally visible ; all the rest is completely
covered in by the metasternum and first abdominal segment, which have met above it ;
the normal articulation of the epimeron with the outer part of the coxa is present, but
quite concealed from view.

By dissection of several specimens of the Fallia from the Hawaiian Islands, I have
found that exactly the same condition exists in that genus.

Moreover, not only are the hind coxae large, consisting each of a transverse pale
portion, quite concealed within the ventral chitinous wall of the body, as well as of the
small globular apical part externally visible ; but the middle and front coxae are of the
same form ; so that none of the coxae are really globular, but are all transverse, with
only the globular ending visible. This I have found to be the case in dissections of
Fallia elongata and of the Central American Discoloma vestitum Pascoe. The exact
condition is described in detail below, under the heading of the genus Fallia,

Fallia is therefore removed from the Latridiidae, where it was placed by Dr Sharp
(op. cit. p. 629), and placed in Discolomidae with Discoloma,

Notiophygus and Holophygus were also placed by Dr Sharp (op. cit. pp. 495, 497)
in Discoloniinae (as a sub-family of Colydiidae). In the form of their antennae and feet
they agree with Discoloma and Fallia, and it is stated that the affinity of Holophygus
with Discoloma cannot be doubted. Altogether it seems probable that the coxae of these
genera will prove similar to those of Discoloma and Fallia.

It is also extremely probable that Aphanocephalus Wollaston belongs to the same
family. It was formerly placed in Corylophidae, but Matthews (op. cit. pp. 2, 3 and
197) has shown that it differs from them in almost every respect. He erected for it
a family Pseudocorylophidae. The affinity of Aphanocephalus to Fallia has already been
pointed out (Sharp, op. cit. p. 629). The underside of Aphanocephalus as figured by
Matthews (op. cit. PL VII. fig. C 2) has in respect of structural characters a strong
resemblance to that of Fallia : dissection would probably prove the somewhat distant,
apparently globular coxae to be in reality transverse. If this should be so, and Aphano-
cephalus is placed in the same family as Discoloma, the name Pseudocorylophidae will
have to give place to the older term Discolomidae.

Horn also called attention to the fact that the tarsi of Discoloma and Notiophygus
are 3-jointed. Holophygus, Fallia and Aphanocephalus have also 3 -jointed tarsi. All
these genera have i -jointed clubs to the antennae. It seems unwise however to mention
these facts as characters in the definition of the family, at any rate at present. The
matter requires thorough investigation. Aphanocephalus, Holophygus and Notiophygus
should be dissected and examined, also a number of other genera. It is possible that
some genera may be found to agree with Discoloma in the structure of the coxae, but not
in the number of joints in the tarsi and antennae.

COLEOPTERA

433

Fallia Sharp.

Pallia Sharp, Biol. Centr.-Am. ii. i. p. 629.

In the original diagnosis the coxae are described as ** omnes minutae, globosae " :
but lower down the same page is the statement ^^it is probable... that these are larger
than they appear to be... I anticipate the structure will be found to be similar to that of
the Discolominae." As described above, this anticipation has proved to be correct.

All the coxae have a globose, darkly coloured apical portion, visible from the
exterior, and a very pale concealed part, elongated in the transverse direction of the
body. The concealed part is considerably longer in Fallia elongata than in Discoloma
vestitum. The coxae of the middle pair are more widely separated than those of the
front pair, and those of the hind pair are still wider separated. The round front coxal
acetabula (the term acetabulum here denotes the round aperture in which is seen the
globose, exposed, portion of the coxa) are closed behind by the prosternum, which is
abruptly bent upwards : a slight elevation of the surface marks the position of the con-
cealed parts of the coxae. Front of the mesosternum forming a peculiar slot or groove
correlated with the back of the prothorax : below this groove, the mesosternum forms
an obtuse free median process, correlated with the slightly excavated upturned part of the
prosternum : below the groove also, only one large side piece can be seen on either
side, reaching to the round coxal acetabulum, and having on its surface a slight elevation
indicating the position of the concealed part of the coxa. Hind coxal acetabula round,
each formed by a deep excavation of the hind margin of the metasternum, and a shallow
one in the front of the first abdominal segment. Hind margin of the metasternum bent
up between the coxae, the bent up part invisible without dissection ; there is also, on
either side near the lateral edge of the metasternum, a bent up piece, in relation with
the outer (basal) end of the concealed part of the coxa. Dissection also reveals that the
front marginal part of the first abdominal segment is bent up forming a somewhat
weakly chitinised wall, which has two concavities exactly fitted to receive the posterior
surfaces of the concealed portions of the hind coxae. The floors of all the cavities con-
taining the coxae (Plate XV. fig. 38 y?.) are of a membranous consistency, and very hard
to detect by ordinary dissection. An attempt is made to show the arrangement of the
hind coxae in Plate XV. figs. 38, 39.

(i) Fallia elongata, sp. nov.

Elliptica, nitida, subtilissime punctulata, nigra, antennis pedibusque testaceis plus
minusve infuscatis, lateribus subtiliter explanatis ; epipleuris sat latis ; his et pectore et
abdomine parcius pubescentibus. F. minori peraiffinis sed longior, prothorace parum
angustior. Long, circa i\ mm.

A close comparison of specimens shows that this species is very closely allied to
the Central American /^ minor Sharp (Biol. Centr.-Am, 11. i. p, 630). The antennae

56—2

434 FAUNA HAWAIIENSIS

are very similar in the two species, 9-jointed with the basal joint broad, the second also
thick, three— eight narrow, three being elongated and four — eight short; the ninth
forms the club. But though there is no apparent structural character separating them,
the general form and outline of F. elongata is distinctly different. F, elongata is slightly
longer ; its prothorax is slightly narrower in proportion, and distinctly narrowed in front ;
the form is slightly less convex ; the elytral punctures are extremely fine and shallow,
and evenly distributed, whereas in the specimen of F. minor which I have examined
under the microscope some slightly larger punctures are scattered near the suture. In
the two specimens from Hawaii the elytral punctuation appears even more obsolete than
in the rest. Fourteen specimens.

Hab. Oahu, Hawaii. — Oahu : Kaala mts., over 2500 ft.; Waianae mts. 2000 —
3000 ft, **from Kukui wood," "from Fungus," ''beaten from dead Koa branches," &c. —
Hawaii : Kaumana, Hilo, 2000 ft. (Perkins).

Fam. TROGOSITIDAE ( = TEMNOCHILIDAE).

Tenebroides ( = Trogosita).

Tenebroides Filler and Mitterpacher, Iter per Poseg. 1783, p. 87.
Trogossita Olivier, Ent 11. no. 19, 1790, p. 5.

(i) Tenebroides mauritanicus, Linnaeus.

Tenebrio mauritanicus Linnaeus, Syst. Nat. loth ed., 1758, i. p. 417; Sharp, Tr.
Dublin Soc. in. 1885, p. 231.

Hab. Cosmopolitan. Introduced into Hawaiian Archipelago; Oahu (Blackburn),
Molokai (Perkins).

Fam. MONOTOMIDAE.

Hesperobaenus Leconte.
Hesperobaenus Leconte, Class, Col, N. Amer. i. 1861, p. 86.

(i) Hesperobaenus capito^ Fairmaire.

Rhizophagus capito Fairmaire, Rev. Zool. 1850, p. 54,
Hesperobaenus capito Sharp, Tr. Dublin Soc. in. 1885, p. 231.

Hab. Kauai, Oahu, Maui, Hawaii. — Kauai and Oahu (Blackburn). — Maui,
Haleakala over 5000 ft. — Oahu, Waianae mts., and Mokuleiia — Hawaii, Kona, 2000 ft.
(Perkins).

COLEOPTERA 435

Fam. NITIDULIDAE,

This is a comparatively small family, the Munich Catalogue of Coleoptera enume-
rating somewhat less than 800 species for all the world. We have recognised 143 species
as occurring in our Fauna. This is a very remarkable development for a small group
of Islands, and the family is undoubtedly one of the more important of the constituents
of the Hawaiian Coleopterous fauna. Of the 143 species 138 are believed to be pre-
cinctive, that is found nowhere else. The 138 precinctive species belong, with a single
exception to a group that until now has been included in the widely distributed genus
Brachypeplus^. I have however decided to abandon the application of this name to any
of the Hawaiian forms, as none of them appear to me to be very closely allied to the
Australian forms for which Erichson established the genus Brachypeplus in the year
1842. Hence we have distributed these 138 species in 13 genera none of which so far
as we know occur elsewhere. Of the five introduced, or non-precinctive species, four
belong to the genus Carpopkilus, many members of which live in food-stuffs, and this is
I believe the case with the Carpophili of Hawaii. The fifth non-precinctive form is an
Eastern species which has been probably introduced with fruit or other food-stuffs. It
should be mentioned that this species has a congener which is at present precinctive but
may prove to occur elsewhere. Neither this genus Haptoncus nor Carpophilus is allied
to the Brachypeplus division, and these non-precinctive forms throw no light on the
origin of the precinctive forms.

The members of this family frequent the oozing sap of trees or live on decaying
vegetable and animal matter, and are frequently found in flowers. So far as is known
the Hawaiian species are not exceptional in these respects. The most remarkable point
that has been discovered about them is the existence of flightless forms. I am not
acquainted with flightless Nitidulidae in other parts of the world, but in Hawaii they
appear to be fairly numerous, nine species exhibiting the character. These nine species
we have placed in four distinct genera. The wings are present in all these forms but
are so much reduced as to be useless for flight. The extent of the reduction appears to
be subject to little or no variation within specific limits, but it is different according to the
species, and in the genera Cyrtostolus (Plate XHI. fig. 24^) and Apetinus the wings
are much larger than they are in other three flightless genera (Plate XHI. fig. 26,
wing oi Apetasimus), In Nesapterus they are extremely minute.

1 There is considerable doubt as to the propriety of retaining the name Brachypeplus in Coleoptera.
Murray in his monograph of Nitidulidae states that the name is preoccupied in Hymenoptera, but without
giving particulars. I believe he was mistaken as I have not been able to trace any Brachypeplus in
Hymenoptera. Whether the Brachypeplus of Charpentier, Orthoptera, fasc. 9, may be anterior to the name
in use in Coleoptera I need not discuss.

436 FAUNA HAWAIIENSIS

The following table may assist in determining the genera :

Elytra leaving only tip of abdomen exposed Haptoncus,

Elytra leaving more than one segment exposed : —

Form very flat; tarsi small, without lobes Cillaeopeplus.

Form elongate moderately depressed ; tarsal lobes very small ; sides of thorax

densely ciliate Notopeplus,

Form not very elongate or depressed

Sides of thorax depressed, not directed outwards Carpophilus,

Sides of prothorax directed outwards : —

Size comparatively large, usually 6 — 9 mm. of length (in Goniorydus
pusillus^ only 4f ). Gofiiothorax^ Gonioryctus, Nesapterus^ Eunitidula^
Orthostolus^ Cyrtostolus^ Apetasimus.
Size small, 4 mm, or less of length. Apetinus^ Eupetinus^ Nesopeplus,
Nesopetinus,

GoNiOTHORAX, gen. nov.

Femora sat elongata, anteriora ultra thoracem bene projecta. Prothorax minus —
vel baud — transverso.

I separate from Gonioryctus a number of species that are aberrant in form,
compared with other Nitidulidae of the group, inasmuch as they have more elongate legs
and a less abbreviate prothorax, which part is usually of remarkable form. In these
representatives the genus looks very distinct, but it is connected to Gonioryctus to a
considerable extent by G, fugitivus and G,foveatus, G, conicicollis may be taken as the
type of the genus. In it the prosternal process is prolonged and prominent behind the
coxae, and the angle formed by the direction of its hinder face is nearly rectangular*
This is almost enough to constitute another genus as compared with G, inaequalis, but
I believe that intermediate forms as regards this character will be found in some of the
other species of the genus.

(i) Goniothorax conicicollis, sp. nov.

Nigricans, antennis pedibusque testaceis, fuscescentibus, abdomine fusco-rufo,
thoracis elytrorumque marginibus plus minusve rufescentibus : thorace subquadrato sed
anterius angustato, lateribus subrectis, angulis omnibus fere rectis. $ Long. corp. 6|- mm;
lat. 2f, long, prothoracis \\ lat. prothor. fere i-|, long, elytr. 2% mm.

Plate XIII. fig. 18, $.

In the female the pygidium is much narrowed towards the tip, where it is not
truncate but slightly notched in the middle, there is no tubercle on it, there is a
projecting tuft on each side of the notch, on the most prominent part. The last ventral
is not elongate, so that the tip of the pygidium (Plate XI 11. fig. 18 ^) can be very distinctly
seen on the lower surface ; the hind margin is slightly rounded, and there is a tuft of
hairs on each side of its middle, just corresponding with the tufts at the apex of the
pygidium.

COLEOPTERA 437

In the male there is no impression on the last ventral, and the hind margin of this
plate is feebly bisinuate. Seventeen specimens.

Hab. Molokai, mountains between 4000 — 4500 ft. (nos. 180, 182, Perkins).

(2) Goniothorax cuneatus, sp. nov.

Praecedenti persimilis ; prothorace paulo longiore notisque sexualibus differt.
? Long. Corp. ']—j\ mm. lat 2| — 2f, long, prothor. i|, lat. prothoracis i|, long,
elytr. 3 mm.

In the female the pygidium (Plate XIII. fig. 18^) is bent down at the tip, and is
there transversely flat, just before this flat part it is convex in the middle so as to appear
tuberculate ; there is a tuft of hairs at each outer angle behind ; the last ventral plate
extends just beyond the pygidium and has on the hind margin two distinct tufts of hair
each placed on a small tubercle.

The male has the pygidium slightly broader at the apex than it is in G, conicicollis,
the last ventral plate is feebly depressed on the middle, and its hind margin is bisinuate,
the middle of it being just perceptibly more prominent than the outer angle, but not in
the least angulate. Ten specimens of this remarkable insect have been found.

Hab. Maui, Haleakala, 4500 — 5000 ft. (nos. 127, 679, Perkins).

(3) Goniothorax elongatus, sp. nov.

t G. cuneati peraffiriis, statura magis elongata, pedibusque crassioribus, distinctus.
Long. Corp. 7-^ mm., lat. 2f, long, prothoracis 2 mm., lat. proth. i|-, long, elytr. i\.

I think this will prove distinct from G. cuneatus, though as the male sex characters
seem to be almost the same it may be only an extreme form. One specimen.

Hab. Maui, Haleakala, over 4000 ft. (no. 680, Perkins).

(4) Goniothorax plebeius, sp. nov.

Z Nigricans, antennis pedibusque fuscis, abdomine fusco-rufo, thoracis elytrorumque
marginibus plus minus rufescentibus ; thorace transverso, lateribus leniter rotundatis,
dense punctato. Long. corp. 6-J mm., lat. 2f, long, prothoracis if, lat. proth. 2, long,
elytr. fere 3 mm,

Closely allied to G. conicicoliis, but of shorter form and with a distinctly transverse
thorax. We have only two individuals ; they are males, and the abdominal characters
are very much the same as they are in G, conicicollis.

Hab. Molokai (nos. 175, 345, Perkins).

438 FAUNA HAWAIIENSIS

(5) Goniothorax perkinsi, sp. no v.

Fusco-rufus, antennis pedibusque rufis, tibiis fuscescentibus ; thorace transverse,
post medium leviter angustato, dense punctate, fere inimpresso. Z Long. corp. 9 mm.,
lat. 3, long, prothoracis 2 mm., lat. proth. 2f, long, elytr. 3^^ mm.

This is the largest and finest of the Hawaiian Nitidulidae, though the thorax is not
so remarkable in form as it is in G. cuneatus and G. conicicollis ; its angles are less
sharply marked, the front angles more rounded, and behind the middle it becomes
perceptibly narrower towards the base. It connects Goniothorax inaequalis with the
Maui and Molokai forms of the genus. We have received only six specimens, most of
which are males ; there are however two females, which, although not taken with the
males, are I believe the same species. This sex has the last segment constructed very
much as in G, cuneatus, but the pygidium is rather broader and more truncate at the
tip ; and the tufts on the hind margin of the last ventral plate are more widely separated.
In the male the structure of the terminal segment is almost the same as it is in
G. cuneatus.

Hab. Hawaii. Kilauea (over 4000 ft., &c.) ; Hilo, 1800 ft. (nos. 565, 584,
823, &c., Perkins).

(6) Goniothorax fugitivuSy Blackburn.
Gonioryctus fugitivus Blackburn, Tr. Dublin Soc. iii. 1885, p. 131.

The unique exponent of this name apparently comes very near G, inaequalis but
does not quite agree, as the inner margin of each tibia is quite straight, and there is no
appearance of incrassation at the tip ; the elytra appear to be more deeply sulcate, and
the thorax rather more densely punctate. It is probably nearer to G, eremitus, but it is
very different in colour, and does not agree in the sculpture, and the male characters
seem to be a little different, but as the specimen is not in good preservation and I am
not able to make a thorough examination of it, I am unable to speak positively.

Hab. Hawaii, 3500 ft. near Waimea on a flower (Blackburn).

(7) Goniothorax inaequalis ^ sp. no v.

Fusco-rufus, thorace baud elongate, posterius leniter angustato ; elytris obsolete
sulcatis, minus obsolete punctatis. Long. corp. 7 — 7^ mm., lat. 2f, long, prothoracis if-,
lat. proth. 2, long, elytr. 3-|.

This species has not the peculiar form of the thorax of the other members of the
genus, but in other respects belongs perfectly to the genus, and the front femora extend
a good deal beyond the sides of the thorax. The male characters are very remarkable ;
the pygidium (Plate XIV. fig. 10 a) is convex and slightly impressed on either side near
the base; the last ventral plate (Plate XIV. fig. 10 ^) has a very large and deep impression^

COLEOPTERA 439

and in the middle the hind margin is much elongated while the lateral angles have
entirely disappeared. In the female the pygidium is convex before the tip ; the tip is
rather abruptly bent down, and its hind margin is produced so as to form an angle in the
middle, each of its hind angles is sharp and b^ars an extremely minute pencil of hairs ;
the last ventral receives the tip of the pygidium, it is therefore just perceptibly prolonged
in the middle, and has a large pencil of hair on each side. Forty-two specimens.

Hab. Hawaii. Kilauea ; Hilo (Haumana 2000 ft, &c.); Olaa (nos. 562, 656,
&c., Perkins).

(8) Goniothorax eremitus, sp. nov.

Minus convexus, sat elongatus, fusco-rufus; thorace ex parte majore rufo, transverso,
posterius angustato, elytris obsoletius sulcatis, minus obsolete punctatis. ^ Long. corp.
j\ mm., lat. 2|, long, prothoracis if, lat. 2, long, elytr. 3 mm.

Closely allied to G, perkinsi but less elongate, with a shorter head, the thorax more
curved in front, the elytra with some slight depressions and rather differenriy sculptured.
In these points nearer to G, inaequalis, but the male has not the remarkable characters
of that species, and the tibiae have no thickening at the tip. The pygidium of the male
is but little convex ; the last ventral has a broad, but not very deep large impression
and is not prolonged in the middle behind. One specimen.

Hab. Hawaii, Kilauea, viii. 1896 (no. 656, Perkins).

(9) Goniothorax foveatus, sp. nov.

Nigricans, antennis pedibusque testaceis, thorace abdomineque rufescentibus ;
minus elongatus, thorace transverso ; elytris inaequalibus, vix subaenescentibus, abdomine
profunde foveolato. Z Long. corp. 6^ mm., lat. 2f, long, prothoracis i^, lat. prothor. 2,
long, elytr. 2|- mm.

This species approaches the genus Gonioryctus, but the femora are well prolonged
beyond the sides of the thorax, and the claw-joint of the tarsus is remarkably long.
The upper surface shows numerous depressions, on head, thorax, elytra and abdomen,
the foveae on the latter being remarkably deep. The sides of the thorax are much
rounded in front, and slightly sinuate behind, the sulcation and punctuation of the elytra
are both indistinct; and the legs are more slender than in the other species of the genus.
In the male the pygidium is rather narrow at the tip; the last ventral has a shallow
depression along the middle, and the hind-margin is slightly bisinuate. One specimen'.

The uneven upper surface of the body, caused by numerous depressions, is
remarkable.

Hab. Molokai, 4500 ft. 11. ix. 1893 (no. 159, Perkins).

1 I have recently seen a second specimen captured by Mr Perkins in 1903. It is of the same sex,
and only differs in the hind angles of the thorax being a little less acuminate.

F. H. III. 57

440 FAUNA HAWAIIENSIS

GoNiORYCTus Sharp.

Gonioryctus Sharp, Tr. ent. Soc. London, 1878, p. 131.

This genus seems quite distinct from Brackypeplus by the characters previously
mentioned by me (1. c). The aberrant forms of the genus do not approach Bracky-
peplus, and are really differentiations of Gonioryctus itself; I have not thought it
necessary to establish distinct genera for them. These aberrant forms are G. oppo-
situs and G, extraneus. If they were separated it would be necessary to place them
in different genera. The species of this genus are very closely allied ; they are
apparently rare, and we have not sufficient material to elucidate them at all thoroughly.
Colour seems to be very variable in them. Unfortunately many individuals of our
small series are immature. I think this is probably due to the life of the perfect insect
being very brief; and this may also account for their apparent rarity.

(i) Gonioryctus kauaiensis, sp. nov.

Suboblongus, depressus, ferrugineus, fusco-, plus minusve, variegatus, vix aeneo-
micans, dense punctatus : elytris sulcis latis sed obsoletis impressis. Long. 8^ — g mm.,
lat, 3^:, long, prothoracis 2^, lat. proth. 3, long, elytr. 4, lat. elytr. 3f mm.

One of the most easily recognised species ; of broad form, with the punctuation
less obsolete than usual. Plate XI V. fig. 9 ^ shows the dorsal aspect of the last segment
in the male (the supplementary segment is hidden by the pygidium) ; hind margin of
the male last ventral plate feebly bisinuate ; the supplementary segment very broad.
In the female the pygydium (Plate XIV. fig. 9 b) is truncate at the tip, with a slight
median longitudinal elevation, and extends rather farther back ; the last ventral is very
slightly rounded behind, and has long pubescence on each side. Nineteen specimens.
The colour is very variable.

Hab. Kauai. 4000 ft. mts. above Waimea, &c. ; Koholuamano (nos. 256, 266,
527, &c., Perkins).

(2) Gonioryctus mauiensis, sp. nov.

Latus, depressus, subnitidus, subtilissime pubescens, ferrugineus, capite etc. fusc-
escentibus ; prothorace disco inaequali ; elytris sulcis parum profundis, latis munitis,
obsolete punctatis. % Long. 8 mm, lat. 3^, long, prothoracis vix 2, lat. prothoracis 2f,
long, elytr. 3|.

We have only one specimen of this species. By its comparatively broad form it
somewhat resembles G, kauaiensis, but has a less ample thorax, and a more obsolete
punctuation. The hind margin of the pygidium is rather more rounded. The thorax
is a good deal contracted at the sides in front, and the sides are a good deal raised.

Hab. Maui, Haleakala, 5000 ft. v. 1896 (no. 604, Perkins).

COLEOPTERA 441

(3) Gonioryctus koae, sp. nov.

Latus, rlepressus nitidus, subtilissime pubescens, ferrugineus, limbo pedibusque
flavescentibus, capite infuscato ; elytris sulcis parum profundis latis, vage fortiter
punctatis. Long. 8 mm., lat 3^ mm.

In the male the hind margin of the pygidium is not rounded, but forms a very
obtuse angle in the middle ; the last ventral is nearly truncate, feebly bisinuate : the
supplementary segment is remarkably broad, rounded, and bears long hairs on the
hind margin. In the female the apex of the pygidium is emarginate, and the angles
bear long hairs ; the hind margin of the last ventral has a pencil of hairs on each side,
and is just perceptibly emarginate between them.

With an obvious general resemblance to G. mauiensis and G, kauaiensis this is
quite distinct. It is a recent discovery made by Mr Perkins who found it in the winter
of 1903 under the bark of Koa tree.

Hab. Oahu, Waianae mountains, 2000 ft. (Perkins, in 1903).

(4) Gonioryctus molokaiensis, sp. nov.

Sat latus, ferrugineus, fusco-variegatus, subaenescens ; elytris parum impressis,
obsoletius sulcatis, evidenter seriatim punctatis. $ Long. corp. 7^ mm., lat. 2f, long.
prothoracis if, lat. prothor. 2\, long elytr. 3 mm.

I have seen only two examples — both females — of this species. It has a slight
resemblance to Goniothorax fugitivus, and as the femora are slightly longer than in
the other species of Gonioryctus it tends to connect the two genera : they are however
definitely shorter than in Goniothorax fugitivus.

The antennae are less elongate than in G. latus \ the head is very broad, the
thorax is rather strongly transverse, and its punctuation is more definite than in
G. latus, and its pubescence is very slight. The surface of the elytra is rather uneven,
and they have a marked metallic reflection, and a scanty, but not very short, setosity ;
definite series of punctures can be seen, but they are fine and the intervals are broad.
The pygidium is elongate, and forms an angle in the middle ; the last ventral is almost
truncate, with a tuft of hairs on each side : as the pygidium is markedly longer than
the last ventral, and has long cilia on the hind margin, it looks underneath as if there
were a supplementary segment in the female sex, which is not the case.

Hab. Molokai. Mountains, 4500 ft. 18. vi. 1893 {^^' 181); Pelekunu, ix. 1893
(no. 145, Perkins).

(5) Gonioryctus acuminatus, sp. nov.

Latus, subdepressus, testaceus, hie inde (praesertim ad elytrorum latera) infuscatus ;
elytris vix sulcatis, seriatim sat subtiliter punctatis. % Long. 6^ mm., lat. 2f, long,
prothoracis i^, lat. proth. 2\, long, elytr. fere 3 mm.

57—2

442 FAUNA HAWAIIENSIS

This is another species of which only a single specimen — a female — has been found,
but I do not doubt its isolation ; the pygidium is coarsely punctate and is more acuminate
in the middle of its hind margin than in any of the immediate allies ; hence this plate
projects very much farther back than the ventral plate, the hind margin of which is
very slightly rounded ; in consequence of this structure the insect when seen from
beneath has all the appearance of possessing a supplementary segment, although a
female. Added to this the sculpture of the elytra differs from most of the allies, there
being no grooves, but distinct series of fine punctures. The antennae are only mode-
rately long, and the club is clear yellow ; the legs are also clear yellow, and the under-
surface is nowhere infuscate. The thorax is a good deal narrowed in front, densely,
somewhat finely punctate ; it has some vague impressions on the disc and the sides are
much explanate. The side margins of the elytra are also markedly explanate. The
pubescence of the thorax and elytra is moderate.

The acuminate pygidium readily distinguishes the insect from the female of
G. arduus ; the largest females of which superficially resemble G. acuminatus.

Hab. Oahu, behind Pauoa Valley, 29. iii. 1895 (Perkins).

(6) Gonioryctus suavis, sp. nov.

Elongatus, ferrugineus, capite, elytris, pectore thoracisque marginibus exceptis
Infuscatis ; prothorace majore, densissime punctato ; elytris obsolete sulcatis, subtilissime
punctatis, subtiliterque pubescentibus. t Long. corp. 9 mm., lat. 3, long, prothoracis
2, lat. proth. 2f, long, elytr. 3^, lat. elytr. 3 mm.

Plate XIII. fig. 19, ^.

The measurements are those of a fine male, the female appears to be a little
smaller, and specially *shorter, one being only 7^ mm. long.

The species is closely allied to G". latus, but is perfectly distinct, the sex characters
being different. G. suavis is also rather larger and more elongate, with finer sculpture.
In the male the pygidium is rather long, truncate at the tip with the angles rounded; the
last ventral is not bisinuate but has the angles prolonged backwards ; the supplementary
segment is long and narrow, almost truncate at the tip. In the female the pygidium is
rounded behind ; the last ventral plate is narrow at the tip, truncate with the angles
rounded, and with a good deal of pubescence on each side of the hind margin.

There is a more or less obsolete median longitudinal line on the thorax, and the
pubescence lies in different directions on either side of this, the hairs being directed
towards the middle line.

Hab. Maui. Haleakala, 3000 — 4000 ft., under Koa bark, &c. (nos. 361, 772);
West Maui, Jao Valley (nos. 349, 689, Perkins).

A specimen with rather shorter thorax, and very dark in colour — the legs being
nearly entirely black- — is assigned to this species. It is a male and the characters of
the sex seem to be the same as in the typical form. Haleakala, 3000 — 4000 ft., i. v.
1894 (no. 361, Perkins).

COLEOPTERA

443

(7) Goniorydus sp. ?

A single female, in bad preservation, found on Oahu, differs from G. suavis by the
pygidium being more rounded at the tip, and the sides of the thorax more narrowly
explanate. It may prove to be a distinct species.

Hab» Oahu. Halemano, 2500 ft, under bark, January 1893 (Perkins).

(8) Gonioryctus haleakalae, sp. nov.

Sat latus, minus depressus, testaceo-ferrugineus, capite, elytris antennisque
extrorsum fuscescentibus ; prothorace anterius rotundato, basin versus angustato, dorso
convexiusculo, inimpresso, densius punctato ; elytris obsoletius sulcatis et punctatis.
Long. Corp. 7 mm., lat. 2|, long, prothoracis if, lat. prothor. 2, long, elytr. 2\ mm.

An elegant insect allied to G. mauiensis, but narrower, with a more golden
pubescence, and in the male sex readily distinguished by the very finely punctate
pygidium, which moreover is less elongate. I know only the male. The thorax is less
widely explanate at the sides than it is in most of the other large species ; it is very
densely punctate. The elytra have only very narrow and obsolete grooves, and an
excessively fine punctuation ; at the base they are yellow. The abdominal punctuation
is very fine ; the pygidium is not elongate, and is almost truncate at the tip, the hind
angles slightly rounded ; the last ventral plate is almost straight behind. Three males.
Also one female that I refer with some doubt to the species.

Hab. Maui, Haleakala, 3000 ft. (no. T]2, Perkins).

(9) Gonioryctus elegans, sp. nov.

Sat latus, minus depressus, flavo-ferrugineus, fusco-variegatus, aurato-pubescens ;
prothorace antrorsum rotundato, posterius angustato, dense punctato, disco convexiusculo,
inimpresso ; elytris obsolete punctatis et sulcatis. $ Long. corp. 6^ mm., lat. 2|, long,
prothoracis if, lat. prothor. 2, long, elytr. 2^ mm.

Like G. haleakalae, but a little narrower and more convex. Thorax but little
explanate at the sides, densely punctured, convex on the middle, without impressions or
channel. Elytra with rather broad but very shallow grooves, and very indistinct
punctuation. Pygidium of male acuminate in the middle : last ventral feebly bisinuate :
tip of supplementary segment slightly emarginate. One specimen.

Hab. Molokai, mountains, vi. 1896 (no, 588, Perkins).

(10) Gonioryctus calvuSy sp. nov.

Sat latus, testaceus, vage infuscatus, subnitidus, minute pubescens. Long. 7^ mm.,
lat. 2\, long, prothoracis if, lat. prothor. 2-J, long, elytr. 2| mm.

Resembles G, suavis and G. kaleakalae in form, but distinguished from them by the

444 FAUNA HAWAIIENSIS

minute pubescence. It is one of longer-antennaed species and has a broad head with
large eyes, the club of the antenna black. The thorax has the sides behind a good deal
explanate, but in front only very narrowly, it is rather densely and finely punctured,
minutely pubescent, the elytra have very shallow, obsolete grooves and obsolete punctua-
tion. The male has the apex of the pygidium elongate, and somewhat acute in the
middle, it is extremely finely punctate, the last ventral is very feebly bisinuate. The
punctuation of the abdomen is very delicate.

Three males, taken at different times, agree with these characters. A specimen of
the other sex, taken on another occasion, is I believe the female of G. calvus ; it is rather
smaller, and has the thorax a little shorter and smaller, and the abdomen not quite so
delicately punctate. The hind margin of the pygidium is nearly straight truncate,
though sufficiently rounded to make the angles a litde indistinct ; the last ventral is also
nearly straight, with a tuft of cilia on each side. All the specimens appear to be
immature ; they all have the elytra infuscate, but paler round the scutellum.

I also assign to this species three individuals in which the colour is much darker,
the head, the thorax except at the sides, and the antennae and legs to a great extent
black. The smallest of these three examples is only 6 mm. long. One of these females
is from the island of Molokai.

Hab. Lanai, Molokai. — Lanai ; mountains of Koele, &c., 2000 — 3000 ft.; summit
of Lanaihale (nos. 84, 87, 93). — Molokai (i female; no. 179, Perkins).

(n) Gonioryctus sp.

A single very immature specimen differs but little from G, haleakalae, but has the
elytra more distinctly sulcate. It is certainly not G, latus, being too narrow, having the
thorax less explanate at the sides, and the pygidium more truncate than the male of
G. latus. It is probably another species.

A second specimen (Oahu, no. 801, but no locality) is even more immature and
apparently has the elytra less distinctly sulcate.

Hab. Oahu, behind Mt Tantalus, on Pipturus (no. 784, Perkins).

(12) Gonioryctus oahuensis^ sp. nov.

Haud latus, minus depressus, flavo-ferrugineus, capite, thorace elytrisque plus
minusve fuscescentibus, fortiter punctatus, elytris subsulcatis, subnitidis. ? Long. corp.
5^ mm., lat. 2^, long, prothoracis i^, lat. prothor. 2, long, elytr. 2\ mm.

This species has the posterior angles of the thorax less acute than usual. The head
is broad, with large eyes, the antennae rather short. The thorax much rounded at the
sides in front, rather coarsely punctured, the disc unimpressed. The elytra are a little
shining, feebly sulcate, with rather coarse, but indefinite punctuation, the sides slightly

COLEOPTERA 445

explanate in front. The pygidium of the female is moderately coarsely punctured, the
hind margin not truncate, but scarcely forming an angle in the middle ; the last ventral
narrow truncate at the tip, with moderately long cilia on each side, leaving only a small
space between them.

One of the two specimens has the hind angles of the thorax rounded, but is I think
the same species as the type in which they are nearly rectangular but slightly obtuse.
Two specimens.

Hab. Oahu, end of Koolau range near Honolulu, August 1900 (no. 785, Perkins).

(13) Gonioryctus latus Sharp.

Gonioryctus latus Sharp, Tr. ent. Soc. London, 1878, p. 129. Blackburn, Tr.
DubUn Soc. iii. 1885, p. 132.

This species is very variable in colour as recorded by Mr Blackburn. It is dis-
tinguished from other species near it by the pygidium of the female being notched and
indented at the tip (see Plate XIV. fig. \2a\ The dorsal aspect of the males last abdo-
minal segment is shown in Plate XIV. fig. 12 b. The individuals are of large size and
very broad form, with transverse thorax, much explanate at the sides, the disc with
indications of slight depressions, the punctuation coarse and rough, but not crowded ;
the sulcation and punctuation of the elytra slight but quite distinct. The sides of
the elytra rather strongly explanate. The species appears to be rare as well as variable,
and I have altogether seen scarcely a dozen examples.

Hab. Oahu. Kawailoa gulch, ^^from the gulch itself and very far up'' (no. 41),
'' Kawailoa, from base of leaves of Freycinetia' (no. 54), '* near head of South branch
of Kawailoa gulch" (no. 239) ; mountains near Honolulu (no. 626, &c., Perkins). Also
found on flowers of palm in mountain forests (Blackburn).

Gonioryctus latus, van dubius, van nov.

Two male specimens differ from the others inasmuch as the last ventral plate has
a large depression extending along the middle for the greater part of the length. It is
possible they may prove to be distinct, but I see no other character of importance to
separate them from small specimens of G, latus. They were taken in the same locality
and at the same date as other specimens that I assign to G, latus, and that are destitute
of this character.

Hab. Oahu, from very far up Kawailoa gulch (no. 41, Perkins).

(14) Gonioryctus similis Blackburn.

G, similis Blackburn, Tn Dublin Soc. in. 1885, p. 131.

The only specimen that has been found appears to be allied to G. latus, and

446 FAUNA HAWAIIENSIS

G. suavts. It is of more elongate form than G. latus, and has the elytra more definitely
sulcate and punctate, and the margin of the male pygidium somewhat acuminate in
the middle.

Hab. Oahu, in the stems of a lily near the summit of Konahuanui (Blackburn).

(15) Goniorydus dissimilis, sp. nov.

Latus, ferrugineus, extense infuscatus, nitidus, fere epubescens ; elytris vix sulcatis
sed minus subtiliter seriatim punctatis. Long. corp. % vix 6 mm., lat, 2\, long,
prothoracis if, lat. prothor. 2|, long, elytr. 2|mm.

Though we have only one specimen of this species it is so distinct that a mistake
can scarcely be made about it. The individual is a female, and has the pygidium
notched at the extremity like G, latus, to the smaller forms of which G, dissimilis is
somewhat similar : but the pubescence on the surface is excessively minute, and the
series of punctures in the shallow grooves on the elytra are more distinct than usual :
and the sides of the thorax are less broadly explanate,

Hab. Oahu, Honolulu, 2000 ft. 27. xi. 1892 (Perkins).

(16) Gonioryctus lanaiensis, sp, nov.

Latus, sordide testaceus, antennarum clava fusca ; thorace transverso lateribus
late explanatis : elytris late sed obsolete sulcatis, obsoleteque punctatis, $ Long. 7 mm.,
lat. 2f, long, prothoracis if, lat. prothoracis 2^, long, elytr. 3 mm.

A single specimen — female — from Lanai belongs to a species that may be the
representative on Lanai of the Oahuan G, latus. It has no notch at the apex of the
pygidium, the tip of which is rounded without any trace of angles, while the last ventral
is truncate, with much ciliation on each side. The supplementary segment is not
emarginate, but is narrow at the tip and slightly depressed there. The sulcation of
the elytra is a little deeper, the pubescence a little less developed. The form of the
thorax is very much like that of G. latus, except that the whole insect is comparatively
a little narrower ; the punctuation of the thorax too is very like that of G, latus. I do
not think the specimen can be a variety of G, calvus, as the thorax is more broadly
explanate at the sides, and none of the details quite agree.

I also consider as being the same species another female considerably smaller,
only 5 mm. long, but in other respects not very different.

There is also a very fine male, 7-^ mm. long, that I believe to be also a specimen
of G. lanaiensis. It is darker in colour, and has the thorax longer and more densely
punctured ; the pygidium has the apex rounded, and the last ventral is almost straight
at the hind margin.

Hab. Lanai, 2000—3000 ft. (nos. 80, 84 Perkins).

COLEOPTERA

447

(17) Gonioryctus bifarius, sp. nov.

Ferruglneus, extense infuscatus ; elytris sulcatis obsolete punctatis. ^ Long. corp.
7 mm., lat. 2^, long, prothoracis if, lat. prothoracis 2^, long, elytr. 2% mm.

Extremely similar to the same sex of G. lanaiensis, but with the male sex characters
different, the pygidium being very acuminate in the middle of the hind margin, and
the supplementary segment rather deeply notched : the lateral angles of the last ventral
are sHghtly prominent, except for this the hind margin is nearly truncate. The thorax
is densely punctured, and but litde uneven, flat on the disc. The grooves on the
elytra are well marked but the punctuation is quite obsolete. There is only a very
minute pubescence, but the surface is scarcely at all shining. One specimen.

Since the above was written I have been able to examine three specimens recently
found by Mr Perkins on Molokai in 1903. Two of them are females and differ from
the corresponding sex of G. lanaiensis, in having the terminal portion of the pygidium
longer and narrower. The male individual quite agrees with the type described above.

Hab. Molokai, Mountains, 9. vi. 1893 {^^' I79j Perkins).

(18) Gonioryctus vicinus^ sp. nov.

Latus, ferrugineus, extense nigricante ; thorace fortiter transverso, inaequali, fortiter
punctato, elytris punctato-sulcatis. % Long. corp. 6\ mm., lat. 2|, long, prothoracis if,
lat. proth. 2^, long, elytr. 2|- mm.

We have only one specimen, a female ; it has the pygidium broad and truncate at
the tip, which moreover is depressed ; so that the individual is not a variety of G, lanai-
ensis ; this form of the female pygidium, in which the angles are distinct, and the surface
between and near them a litrie bent down, is an approximation to the slightly notched
pygidium of G. latus. G. vicinus differs also from G. lanaiensis by the shallower,
narrower grooves of the elytra, and the more distinct punctures in them. The greater
amount of black colour in this specimen of G. vicinus, even the legs being to a large
extent black, is I believe merely varietal. The pubescence is much rubbed off, but
from the remains I think would be in the fresh state much like that of G lanaiensis.

Hab. Lanai, 2000 ft. January, 1894 (Perkins, no. 80).

(19) Gonioryctus arduus, sp. nov.

Sat latus, subdepressus, haud nitidus, ferrugineus, hie inde infuscatus, vel nigro-
variegatus ; prothorace fortiter transverso, ad latera parum impresso, dense subtiliter
punctato ; elytris obsolete punctato-sulcatis. t Long. corp. 5 J mm., lat. 2^^, long, pro-
thoracis if, lat. prothor. vix ultra 2, long, elytr. 2|^mm.

F. H. HI. 58

448 FAUNA HAWAIIENSIS

In this species the sides of the thorax are broad, but they are little elevated, there
being comparatively little impression of the surface ; the head is very broad ; the
punctuation of the thorax is very dense and is rather fine, the pubescence is short and
very fine but not scanty ; there are two vague depressions just behind the middle of
the thorax. The elytra are a little uneven owing to numerous small depressions ; their
grooves are not deep, and are rather narrow, being scarcely as broad as the interstices.
The pygidium is rather short in the male, and rounded at the tip, very finely punctured
towards the apex ; the last ventral is almost truncate. In the female the pygidium
is not rounded at the tip, neither is it quite truncate, the margin being a little sloping
on each side, though only very sHghtly. Hence the sexes are externally more similar
than usual, the male being distinguished by the more rounded hind margin of the
pygidium, and by the supplementary segment, which, however, usually projects very
little.

The individuals from Molokai and Lanai agree fairly well in the above characters ;
there is a good deal of variation in the colour and size, and to a certain extent in the
amplitude and sculpture of the thorax ; the variation in this latter respect being in
a certain degree sexual. Two females from Maui are more aberrant, the pygidium
being a little differently shaped, and more distinctly angulate in the middle of the hind
margin. A female from Oahu is still more aberrant, the thorax being a little differently
shaped and the pygidium narrower at the tip. More material can alone decide whether
these slight distinctions are important.

Hab. Lanai, Molokai, Maui, Oahu. — Lanai ; 2000 ft. and over (nos. 84, 86),
Koele mts. 2500 ft. — Molokai; 3000 — 4500 ft. and over; *' highest forest" (no. 155);
**head of Pelekunu" (no. 165). — Maui; Haleakala, 3000ft. (no. 772). — Oahu (Kawai-
loa gulch (nos. 41 and 832, Perkins).

(20) Gonioryctus anticatus, sp. nov.

Sat latus, subdepressus, haud nitidus, ferrugineus, superne hie inde infuscatus ;
prothorace fortiter transverso, postice parum angustato, sat dense punctato ; elytris
distincte sulcatis, obsoletissime punctatis. % Long. corp. 6 mm., lat. 2f, long, protho-
racis ij, lat. prothoracis 2^, long, elytr. 2f mm.

Although very similar to G, arduus I have no doubt that this is a distinct form,
as it has a narrower head, and the female pygidium more prolonged in the middle
so that it overlaps the ventral plate, and is quite visible when the under-surface is
looked at. The thorax is but little narrowed behind, and it is very difficult to see
definitely punctures in the grooves of the elytra. I have seen only females. Three
specimens.

Hab. Kauai. Mountains above Waimea, under bark of Koa and other trees,
4000 ft. (nos. 256, 257) ; also one from high plateau (no. 631, Perkins).

COLEOPTERA

449

(21) Gonioryctus blackburni Sharp.

Gonioryctus blackburni Sharp, Tr. ent. Soc. London, 1878, p. 130.

Very closely allied to G. arduus, but I believe really distinct ; it is of the size of
the smallest specimens of that species, but it is more depressed, more densely and finely
punctate, and the head is a little narrower and the eyes slightly smaller : the pronotum
is remarkable for being more nearly flat than in any of the other species. The male
has the pygidium narrower at the extremity. I have not seen the female.

Postscript. Three years after writing the above a few additional specimens of
G. blackbm^ni have been shown to me by Mr Perkins ; they were captured on the
mountain near Honolulu in 1906 and 1907, some of them are labelled ''Tantalus iv. '07."
They include one female. The characters of this sex are similar to those of G, arduus
?, but the pygidium is rather smaller and less uneven and its angles more indistinct.

Hab. Oahu. On flowers of trees in mountains (Blackburn); and no. 710
(Perkins).

(22) Gonioryctus pusillus, sp. nov.

Testaceus, plus minus fuscescens, subtilius pubescens, prothorace disco con-
vexiusculo, haud impresso, elytris baud sulcatis, subtiliter seriatim punctatis. ^ Long,
corp. 4| mm., lat. i|, long, prothoracis vix ultra i, lat. prothoracis i\\ long, elytr. 2 mm.

This is only about half the length of G, calvus, and has very little trace of
grooves on the elytra, and in the male the pygidium is less acuminate, so that notwith-
standing the general resemblance in colour I think the species is distinct from the type
form of G, calvus ; it is however possible that a form I have assigned as a van to
G. calvMs may be this species, or an intermediate form. The van ? of G. calvus is
known only by the female, and G. pusillus by a single male. With such inadequate
material of difficult and variable species it is not possible to feel convinced.

The female has the pygidium a little rounded behind, almost as in G, calvus,

Hab. Lanai, 2000 ft. (no. 80), and above 2000 ft. behind Koele (no. 88, Perkins).

(23) Gonioryctus extraneus, sp. nov.

Convexus, rufus, extense nigricans, supra aeneo-micans, pubescentia rara et brevi ;
elytris obsolete punctatis, subnitidis, nuUo modo striatis, vix perspicue seriatim punctatis.
Long. Corp. 6 mm., lat. 2\, long, prothoracis if, lat. prothon 2, long, elytr. 2\ mm.

We have only one mutilated specimen, but it is one of the most distinct of the
species. The colour is probably variable. The throat is transversely convex, quite
without impressions on the disc, finely punctate, with a fine pubescence ; the sides are
but little explanate and the hind angles are distinctly obtuse. The shining elytra are

58—2

450 FAUNA HAWAIIENSIS

remarkable for their comparative smoothness, but they have distinct pubescence, and
hence have not a poHshed appearance. The apical portion of the abdomen has been
broken off The legs are yellow. The prosternum is less flat than usual ; between the
coxae it Is very finely margined, and is abruptly bent up behind the coxae.

Hab. Hawaii, Olaa, ix. 1896 (no. 688, Perkins).

{24) Gonioryctus oppositus, sp. nov,

Subdepressus, haud latus, testaceus, thorace fusco-vittato, abdomine fusco-maculato,
elytris interdum picescentibus ; obsolete punctatus, minute pubescens, elytris aequalibus,
nee sulcatis neque impressis. Long. corp. 5^ mm., lat. if, long, prothoracis i^, lat.
prothor. i^, long, elytr. 2 J mm.

This is not like any other of the Hawaiian Nitidulidae, though it is doubtless part of
the precinctlve network of forms. It is variable in colour, being sometimes pale yellow,
and in other cases the surface is more or less suffused with dark colour. The strongly
transverse thorax is a good deal narrowed behind, much rounded at the sides and front
angles, the posterior angles obtuse, the explanation of the sides remarkably conspicuous,
the surface subobsoletely though not very finely punctate. The elytra have neither
seriate punctuation nor grooves, and only traces of depressions; they have a minute
diffuse punctuation and pubescence.

The female has the apex of the pygidium (PL XIV, figs. "] d and 7/") broad, and
almost truncate ; the fimbriae project a little behind as minute free angles ; the last
ventral (PL XIV. fig. 7^) is quite truncate (except at either apical angle, where it is
slightly produced) and the same length as the dorsal plate. The male has the pygidium
(PL XIV. fig. "] c) distinctly prolonged, and very obtusely acuminate in the middle; the
last ventral (PL XIV. fig. 7^) is slightly emarginate, and the supplementary segment
(PL XIV. fig. "] a) is narrow at the tip though not pointed.

This very distinct species has the prosternum less bent up behind the coxae than
the normal Goniorycti, and the eyes are rather smaller, so that it somewhat approaches
G. exilts,

Hab. Hawaii. Olaa (nos. 635, 688); ? Kilauea (685). (Perkins).

Nesapterus, gen. nov.

Corpus subdepressum, apterum ; elytra lateribus explanatis ; oculi tarsique mediocres;
prosternum post coxas parum recurvatum.

The type of this genus is Gonioryctus monticola^ a species formerly placed in
Gonioryctus with reluctance because of its aberrant character in several respects, and
now removed because it is found to be quite destitute of organs of flight. A new
species discovered by Mr Perkins closely allied to JV, monticola is added.

COLEOPTERA 451

The genus has an analogy with Apetinus, but is not allied thereto ; the larger and
more coarsely faceted eyes, the much more largely developed tarsi, and the pronounced
facies of Gonioryctus show that it is allied thereto and not to the Eupetinus group of
genera.

(i) Nesapterus monticola. Sharp.

Gonioryctus monticola Sharp, Tr. ent. Soc. London, 1878, p. 130.

Plate XIV. fig. 4, ^.

The peculiar dense and rough sculpture of the elytra make this species very
remarkable. It appears to be excessively rare.

The unique example found by Mr Perkins is a female, and does not quite conform
to Mr Blackburn's description of the female characters, I.e. p. 131 ; the tuberculation
of the pygidium being extremely obscure, as is also the terminal margin alluded to
by him.

Hab. Oahu. Near the summit of the highest peak (Blackburn) ; end of Koolau
range, vi. 1900 (no. 789, Perkins).

(2) Nesapterus exilis^ sp. no v.

Haud latus, subdepressus, fereopacus, et pubescentiae destitutus; elytris subsulcatis,
sulcis fortiter punctatis. % Long. corp. 5-I mm., lat. vix ultra 2 mm., long, prothoracis
if, lat. prothoracis i-|, long, elytr. 2 mm.

Closely allied to G, monticola, but readily distinguished by the sculpture of the
elytra, which are vaguely grooved, and have comparatively large punctures in the
grooves ; they are also a little longer than the elytra of monticola. We have only one
specimen. It is a female and has the pygidium obtusely pointed in the middle of the
hind margin, and projecting a good deal beyond the last ventral plate.

Hab, Lanai, behind Koele, 11. 1894 (^o- 87, Perkins),

EuNiTiDULA, gen, nov.

Generis Goniorycti affinis.

Prosternum posterius protuberans.

Corpus subpolitum.

This insect is distinguished from Gonioryctus by characters that are of importance
in other groups of Nitidulidae. The prosternum instead of being curved upwards
immediately behind the front coxae, is prolonged backwards so as to form a clumsy
prosternal process ; and concomitantly with this the base of the pronotum reposes to a
larger extent on the elytra, so that the humeral angles of these are in repose con-
siderably in front of the base of the thorax.

452 FAUNA HAWAIIENSIS

The structure of the prosternum is much like that existing in Goniothorax conici-
collis ; in other respects the two insects are so different, that if the forms were placed
in Gonioryctus the two species in question would have to be widely separated in it.

(i) Eunitidula sublaevis, sp. nov.

Haud latus, minus depressus, tenuissime pubescens et parce punctatus, fere politus,
colore varians ; thorace minus trans verso. Long. corp. 5-J- mm., lat. 2, long, prothoracis
i|-, lat. prothoracis i|-, long, elytrorum 2 mm.

Plate XIII. fig. 20.

The colour is red varied with black, but the extent of the black varies greatly and
in one of the two individuals is more extensive than the red. The thorax is less
rounded at the sides than it is in Gonioryctus, The width is almost the same at the
front and the hind angles ; the hind angles are rectangular, and the front angles are less
rounded than in Gonioryctus ; the punctuation is distinct but fine, and comparatively
scanty so that the surface is shining. The elytra are only obsoletely striate-punctate
and there is very little punctuation of the abdomen. The male has the hind margin of
the pygidium rounded ; the female has it just perceptibly more pointed in the middle.
One pair.

Hab. Maui, Haleakala, 5000 ft, in. 1894 (no. 127, Perkins).

Orthostolus, gen. nov.

Sulci antennarii convergentes ; prosternum processu post coxas haud recurvato,
coxae posteriores distantes. Alae perfectae.

This genus — for which O. robustus is the type species — differs from Gonioryctus in
the prosternal process being scarcely at all curved upwards at the apex, by the smaller
eyes, with smaller facets, and by the smaller lobes of the tarsi.

It is the most central form of the Hawaiian Nitidulidae, and like all the Hawaiian
allied forms it differs markedly from Brachypeplus by the much more widely separated
hind coxae. Notopeplus is connected by means of Orthostolus with the other Hawaiian
forms,

(i) Orthostolus robustus, Sharp.

Brachypeplus robustus Sharp, Tr. ent. Soc. London, 1878, p. 134.

Plate XIII. fig. 21, t under surface.

I described this species from two specimens, 1^,1$. We have now a very large
series of nearly 300 specimens. There is a very considerable difference between the
sexes. The male is nearly always much darker in colour than the female, and slightly
narrower. It varies in length from 4^ to 7 mm. and in breadth i\ — 2\ mm. The

COLEOPTERA

453

female is of a dusky testaceous colour, with darker spots on the dorsum of the abdomen;
these spots are variable in size, and when most extended coalesce so as to make the
middle of this part of the abdomen darker than the sides. These specimens therefore
approach somewhat to the male in colour. There is also a slight variation in the
depressions on the thorax. The elytra have several small indistinct depressions
sufficiently evident to make them appear a litrie uneven. The original diagnosis is
as follows : '' Sat latus et elongatus, subparallelus, depressus, fere opacus, testaceus sed
plus minusve infuscatus, leviter aeneo-micans, antennis fuscis basi testaceo ; capite pone
oculos mediocres obliquo, crebre fortiter punctato ; prothorace fortiter transverso, anterius
leviter emarginato, angulis posterioribus fere rectis, fortiter crebre punctato, disco obsolete
tri-impresso ; elytris opacis, coriaceis, conspicue seriatim punctatis, interstitiis latis, haud
punctatis, angulo suturali recto; abdomine dense punctato. Long. 6 mm. lat. 2 mm."

The species is found occasionally in numbers about trees on the mountains near
Honolulu, but we have not received it from any other locality, except that certain
specimens from the island of Lanai appear not to be constandy different (see van
lanaiensis below).

Hab. Oahu. Mountains near Honolulu (Blackburn). Mountains near Honolulu,
under bark with larvae, 27. x. 1892 (no. 76, 5 specimens) : Mokuleia, v. 1901 (no. 752,
3 specimens) : Waialua, ix. 1900 (no. 763, i specimen) : Pipturus back of Tantalus, vii.
and VIII. 1900 (nos. 785 and 786, 43 specimens): Honolulu (without date or exact
locality): (nos. 789 and 901, 232 specimens) (Perkins).

Orthostolus robustus var. lanaiensis, van no v.

O. robusti affinis paulo major praesertim latior, impressionibus thoracis et elytrorum
minus obsoletis. Long, fere 7 mm., lat. 2\ mm.

A small series of 16 specimens from the island of Lanai might be distinguished
by the above characters from O, robustus of Oahu, were it not that the slight characters
are variable, and one of the Lanai females cannot be satisfactorily distinguished from
certain examples of the same sex from Honolulu.

We have examined the aedeagus of the male and find a slight distinction in it as
compared with Honolulu specimens, but whether this is a constant character we cannot
say, and the difference is only slight.

Hab. Lanai. Mountains, 2000 — 3000 ft., Halepaakai, Koele, etc. (nos. 80, 93,
etc., Perkins).

(2) Orthostolus nepos, sp. nov.

^ Latior, depressus, fere opacus, fusco-testaceus, leviter aeneo-micans, antennis
pedibusque sordide testaceis; prothorace fortiter transverso, dense punctato, disco tri-
vel quadri-impresso, angulis posterioribus argutis, leviter obtusis, fere rectis; elytris
inaequalibus, striis latis leviter impressis obsolete punctatis. Long. 7 mm. lat. 2\ mm.

454 FAUNA HAWAIIENSIS

Four male individuals though very near to O, robustus are evidently distinct,
being comparatively*" broader, with broader head, longer antennae, more sharply
marked hind angles to the thorax and more uneven elytra. A single female is no
doubt of this species, though of much paler colour, corresponding in this respect with
the female of O, robustus.

Hab. Oahu, mountains near Honolulu, 2000 — 2500 ft. (nos. 43, 76, Perkins).

(3) Orthostolus germanus, sp. no v.

t Latior, depressus, fere opacus, fuscus, leviter aeneo-micans, marginibus plus
minus anguste et vage rufescentibus, antennarum basi pedibusque sordide rufis ;
prothorace fortiter transverso, dense punctato, disco quadri-impresso, angulis posteri-
oribus argutis, rectis, fere acutis ; elytris sat profunde multi-impressis, striis leviter
impressis, obsolete punctatis. ? Pallidior, ex parte majori testacea. Long. corp. 6 mm.

This is another of the very close allies of (9. robustus, but though we have only
a very small series it is clearly distinct, having the sides of the thorax rather
differently shaped so that the hind angles are almost acute: the elytra are differently
sculptured, the surface being very uneven and the sculpture of the striae less regular.
These characters bring the species nearer to O, nepos, but the shape of the hind
angles of the thorax is sufficiently distinctive. Ten specimens.

Hab. Molokai. Mountains, 4000 — 4500 ft.; ''above Pelekunu" (no. 173); ''highest
forest" (no. 155, Perkins).

(4) Orthostolus prosternalis, sp. nov.

$ Latior depressus, opacus, fuscus, prothorace ad latera late rufo, antennis
pedibusque rufis ; femoribus abdomineque fusco rufis ; prothorace fortiter transverso,
dense punctato, disco parum profunde quadri-impresso, angulis posterioribus leviter
obtusis ; elytris leviter inaequalibus, subtiliter striato-punctatis ; prosterno processu
post coxas latiore, longius ciliato. Long. 6f mm., lat. 2^ mm.

This is a close ally of O. robustus, and, though we have only one example I do
not hesitate in giving it a name as the prosternal process (PI. XHL fig. 22) exhibits
the definite difference mentioned above. It is also broader than O, robustus, and
darker in colour than the corresponding sex of that species,

Hab. Maui, Haleakala, 3000 ft. (no. 772, Perkins).

(5) Orthostolus guttatus, Sharp.

Brachypeplus guttatus Sharp, Tr. ent. Soc. London, 1881, p. 513.

Mr. Perkins' collection contains 12 specimens of this species, from Hawaii. It
was originally found in Oahu. These original Oahu specimens (now in the British
Museum) are mostly large and very light-coloured. The thorax is reddish all over,

COLEOPTERA 455

or at any rate only darker in the central portion: the ground-colour of the elytra
and abdomen is red-brown. Mr Perkins' Hawaii specimens are mostly distinctly
smaller, and very dark, the ground-colour of elytra and abdomen being almost black.
But some of them vary, approaching the Oahu specimens, and it does not seem
possible to separate the two series.

O, guttatus is characterised by the presence of lighter, reddish or testaceous,
marks on the elytra. It is longer than O. sordidus, and less pubescent ; the thorax
is relatively longer, much less rounded at the sides, more neariy quadrate, and has
the four impressions on the disc less marked.

Hab. Oahu, Hawaii. — Oahu; near Honolulu, 1500 ft. or more, usually at
exuding sap of Koa tree (Blackburn). — Hawaii; Kona 3500 ft. vii. 1892 (Perkins).
H. S.

(6) Orthostolus sordidus, Sharp.

Brachypeplus sordidus Sharp, Tr. ent. Soc. London, i88i» p. 514.

Plate XHL fig, 23, wing.

This insect was described from a single badly preserved female, from Kilauea,
Hawaii. We have now 15 specimens, from Kona, Hawaii, and one % from Mauna
Loa, the district where the original specimen was caught.

The species is very variable in colour. Some specimens are red-brown, more
or less dark brown in the central parts of the prothorax, abdominal segments, and
sometimes of the elytra also ; others are dark brownish-black, with the red-brown
colour reduced to two small areas at the base of each elytron, and to the posterior
margins of the abdominal segments. The posterior margins of the elytra are curved.
The male supplementary segment is strongly acuminate. The male pygidium is
truncate, with more or less of a notch in its posterior margin ; female pygidium rounded
and somewhat narrow at the apex.

One dark female differs from the rest in being more shining. A single male also
is more shining than the rest, and has the notch in the pygidiiim deeper.

The species agrees with the allied O, kauaiensis and O, atratus and with Cyrtostolus
subalatus, in having the pubescence on the elytra concentrated m places into tufts, the
most conspicuous of which is one near the middle of the elytron.

Hab. Hawaii. Kona, 3000 — 4000 ft., and Mauna Loa 4000 ft, vii. and viii.
1892 (Nos. 316, 823, Perkins) ; Kilauea, about 4000 ft. (Blackburn). H. S.

(7) 'Orthostolus expers, Blackburn.

Brachypeplus expe7^s Blackburn, Tr. Dublin Soc. iii. 1885, p. 136.
This form is known only by a single specimen, now in the collection of the British
Museum. We cannot quite match it with any specimen of O, sordidus. It is entirely
F. H. III. 59

456 FAUNA HAWAIIENSIS

pale red though it appears to be quite mature. As O. sordidus is a variable species I
anticipate that O. expers will prove to be merely a pale variety of it. It comes however
from a different island.

Hab, Maui, Haleakala, under the bark of a tree, 4000 ft. (Blackburn). D. S.

(8) Orthostolus atratus, sp. no v.

Nigricans, antennis pedibusque sat nigris, parum rufescentibus, abdominis seg-
mentorum marginibus posterioribus rufescentibus ; crebre punctatus, parum dense
pubescens ; prothorace fortiter transverso, angulis anterioribus parum rotundis, posteriori-
bus argutis, disco quadri-impresso ; elytris obsolete impressis, sulcis argutis impunctatis,
ad latera evidenter explanatis, marginibus posterioribus curvatis, basi guttis fusco-rufis ;
Long. corp. 4^ — ^\ mm. ; lat corp. if — 2^ mm.

This species is darker than O, sordidus, and has blacker antennae and legs ; also
the supplementary segment in the male differs, being rounded, not acuminate as in
O, sordidus. The % pygidium is somewhat concave in outline at the sides, narrow and
rounded at the extremity ; the ^ pygidium tapers more than that of the female, and is
slightly truncate.

A single female from Maui differs from the rest in being distinctly shining and in
having scarcely any pubescence. The depressions on the prothorax and elytra are more
marked, and there are slight depressions on the abdomen.

The male from Hawaii is the smallest of all the specimens but in other respects
agrees with them. Seven specimens.

Hab. Maui, Molokai, Hawaii. — Maui, Haleakala 4500 — 5000 ft, under bark
(nos. 366, 116). — Molokai, Waikolu (no. 234). — Hawaii, Kilauea, no. 656. (Perkins.)
H. S.

(9) Orthostolus kauaiensis, sp. nov.

O. sordidi perafifinis, sed maris pygidio rotundiore minusque impresso, prosterno
processu vix minus expanso, prothorace parum majori. Maris segmentum terminale
acuminatum. Fuscus ; prothoracis abdominisque marginibus, antennarumque basi
testaceis, elytrorum basi rufescente, pedibus fusco-testaceis. Long. corp. 5 mm.

A single male from Kauai differs from O, sordidus in the characters given above.
The supplementary segment appears less sharply acuminate than those of the males of
O. sordidus,

Hab. Kauai, mts. Waimea, under Koa bark, 4000 ft, v. 1894 (no. 257, Perkins).
H. S.

COLEOPTERA 457

Cyrtostolus, gen. nov.

Sulci antennarii sat convergentes, prosternum processu post coxas parum curvato,
coxae posteriores distantes. Alae abbreviatae.

Plate XIII. fig. 24^, wing.

This genus is separated from Orthostolus on account of the aborted wings. This
character seems to be quite constant. The species has quite the appearance of the
species of Orthostolus allied to O, sordidus, and the only other structural distinction I can
observe is that the prosternal process is slightly more curvate.

It should be noted that the wings of this species are not so reduced as they are in
the genera Nesapterus and Apetinus : the size of the wings is nevertheless very little
variable ; if we suppose that the species is on the way to becoming nearer to the apterous
condition it is most difficult to believe that natural selection would aid this in any direct
way. In other words the variation in the size of the wings is not of selectional value.
D. S.

(i) Cyrtostolus subalatus, sp. nov.

Latus, depressus, rufo-fuscus plus minusve infuscatus, marginibus rufescentibus,
leviter nitens, crebre punctatus, subtile pubescens ; antennis pedibusque rufo-fuscis ;
prothorace transverso, disco quadri-impresso, angulis anterioribus rotundis, posterioribus
plus minusve argutis ; elytris obsolete impressis et sulcatis, marginibus posterioribus
fortiter curvatis ; abdomine obsolete impresso. Long. corp. 4f — 6-|- mm., lat. corp.
2\ — 2-| mm.

Plate XIII. fig. 24, ^.

This insect is immediately distinguished from O. sordidus by its reduced wings.
The pro thorax is longer than in O. sordidus. It agrees with the latter in having the
male supplementary segment strongly acuminate. % pygidium somewhat narrow,
rounded in outline at the extremity ; t pygidium more truncate, with a very slight
notch at the apex. The species is variable in size ; some smaller specimens are lighter
and more uniformly red-brown. 31 specimens.

We have examined several specimens with regard to the condition of the wings ;
though the species is a variable one, in this respect it seems to be constant. The
wings are not completely aborted, but a little shorter than the elytra and broad at the
extremity, so as to be roughly triangular (see PI. XI 11. fig. 24 a).

Hab. Maui, Haleakala 4500—5000 ft., iii. and iv. 1894, v. 1896 (nos. 350,
600, &c., Perkins). H. S.

59—2

458 FAUNA HAWAIIENSIS

Apetasimus, gen. nov.

Pedes breves, tarsorum lobi parvi. Metasternum breve. Alae minutae.

Plate XIII. fig. 26, wing.

In this genus the wings are much more aborted than in Cyrtostolus, being quite
minute. The front angles of the thorax project forwards on either side of the head
much less in this genus than in the allied Cyrtostolus, The metasternum is short ; and
the coxal process of the abdomen is broader, and has its margin less arched, than in
Cyrtostolus, The distance between the posterior coxae, which is characteristic of this
division of Hawaiian Nitidulidae, almost reaches a maximum in this form. On the
other hand, the tarsal lobes are. small, a character which is very striking when Apetasimus
is compared with such of its allies as Goniotkorax. The apex of the prosternal process
is much bent upwards; the prothorax is more convex transversely than it is in Orthostolus,
but there is very little explanation of its sides. The genus is a very peculiar one. D. S.

(i) Apetasimus involucevy sp. nov.

Convexus, nitidus, fusco-ferrugineus, antennis pedibusque ferrugineis, crebre
punctatus, parce pubescens ; prothorace transverso, convexo, ad latera nullo modo
explanato, anterius angustiore, disco obsolete quadri-impresso ; elytris marginibus pos-
terioribus fere rectis, ad latera parum explanatis, sulcis punctis magnis, interstitiis
punctis parvis. Maris pygidium conspicue emarginatum. Long. corp. 4 — 5 mm. ;
lat. corp. 2 mm.

Plate XIIL fig. 25, $.

This species is very distinct in general appearance from those of the genera
Orthostolus and Cyrtostolus, and is further separated from them by its minute wings
(PI. XI 1 1, fig. 26).

In one specimen the four depressions on the prothorax are fairly distinct ; in the
others, hardly present. The notch in the ^ pygidium is broad and rather deep, the
pygidium forming a narrow and somewhat sharp piece on either side of it. $ supple-
mentary segment terminally almost truncate. The $ pygidium is somewhat long, and
narrow at the apex, rather truncate with rounded angles, and an extremely slight de-
pression on the posterior margin. 10 specimens.

Hab. Kauai, Makaweli 2500 ft., 11. 1897 (nos. 668, 703, Perkins). H. S.

Apetinus, gen. nov.

Sulci antennarii convergentes. Prosterni processus ad apicem nullo modo re-
curvatus, brevissime ciliatus. Coxae posteriores distantes. Metasternum brevius eo
Eupetini. Alae abbreviatae.

COLEOPTERA 459

This genus has the same relation to Cyrtostolus that Eupetinus has to Orthostolus,
It is distinguished from Eupetinus by the condition of the wings, the metasternum at
the same time being shorter. On comparing several specimens of A. explanatus with
specimens of several species of Eupetinus, we find the posterior coxae slightly further
apart.

The wings are of the same form as those of Cyrtostolus, The apical portion is
absent, the shape somewhat triangular, the outer margin slightly concave.

The genus can be divided into two sections corresponding to those of Eupetinus,
The first consists of the closely-allied A. macrothorax and A, medius. These have
narrow explanate margins to the elytra, which are as long in proportion to the whole
length as those of Eupetinus, Their wings are as long as, or slightly longer than, half
the length of the elytra.

The second section consists of ^. explanatus, of which we have a large series, and
the closely-allied A, brevis and A, pumilio. These have broad elytral margins and
shortened elytra. In eight specimens of A, explanatus which we have examined, the
wings are decidedly less than half as long as the elytra. H. S.

(i) Apetinus macrothorax, sp. nov.

Sat latus, fusco-testaceus ; marginibus, pedibus, antennarumque basi ferrugineis;
pedibus longis ; prothorace magno, elongato et lato, lateribus rotundatis, anguHs poste-
rioribus argutis, disco quadri-impresso, crebre punctato ; elytris impressis, ad latera
explanatis, sulcis argutis punctatis, interstitiis transverse striatis ; abdomine sat crebre
punctato. Long. corp. /^\ mm., lat. corp. 2 mm., long, prothoracis circa i;^ mm.

Plate XIII. fig. 27.

This remarkable species is characterised by the size of the prothorax (which is
considerably elongated, not strongly transverse, and is conspicuously broad, its greatest
breadth forming almost the greatest breadth of the body), and by the length of the legs,
the femora projecting distinctly beyond the edges of the body. The male supple-
mentary segment is rounded, slightly tapering towards the apex ; male pygidium
truncate with rounded angles; female pygidium broader, subtruncate.

The wings are reduced to the same form as those of A, explanatus, with concave
outer margins ; but they are somewhat more than half as long as the elytra. Three
specimens.

Hab. Molokai, highest forest, 21. ix. 1893 ("o. 155, Perkins). H. S.

(2) Apetinus medius, sp. nov.

A, macrothoracis peraffinis, sed minor, prothorace breviore, obsoletius punctato.
Prothorax latus fortiterque transversus. Pedes longi. Long. corp. 4^ mm. ; lat. corp.
if mm. ; long, prothoracis i mm.

46o FAUNA HAWAIIENSIS

A single male from Molokai differs from A. macrothorax in the characters given
above. The punctures on the prothorax are obsolete, with striae radiating from them
in a stellate manner, as in Eupetinus marginatus. The supplementary segment tapers,
but is rounded at the apex ; pygidium truncate with rounded angles. The wings are
about half as long as the elytra.

Hab. Molokai, over 4000 ft., 15. vi. 1893 (Perkins). H. S.

(3) Apetinus explanatus, Sharp.

Brachypeplus explanatus Sharp, Tr. ent. Soc. London, 1879, p. 84.

This species was described from a single very good male specimen from the
mountains near Honolulu. We have now a series of 128 specimens, almost all of
which are darker than the original specimen, which was scarcely mature ; it was
described as **ferrugineo-testaceus " in the original diagnosis. *' Fusco-ferrugineus,
prothorace interdum minus infuscato " is applicable to our series. The head and eyes
are small. The alternate interstices of the elytra form conspicuous ridges, which are,
however, frequently interrupted by vague inequalities of the surface. The pubescence
on the abdomen is less coarse and dense than in some allied species.

The abdomen is acuminate. The male supplementary segment is obtusely acumi-
nate, with a number of long hairs at the apex. The male pygidium is somewhat long,
narrow and convex, having a truncated apex with rounded angles ; female pygidium
shorter and broader, rounded at the apex.

We have examined the wings of several specimens, and find them less than half
as long as the elytra, somewhat triangular in shape ; rather like those of Cyrtostolus
subalatus, but more reduced.

Hab. Oahu ; Honolulu mountains, end of Koolau range, &c. ; found in numbers
only in one spot, on the ground, in dead leaves ; xi. and xii. 1900, vi. 1901 (Perkins).
H. S.

(4) Apetinus brevis, Sharp.

Brachypeplus brevis Sharp, Tr. ent. Soc. London, 1878, p. 137.
This is allied to A. explanatus, though very much smaller, and with much feebler
legs. It has not been found by Mr Perkins.

Hab. Oahu, **by sifting dead leaves at the foot of a precipitous cHff" (Blackburn).

(5) Apetinus pumilio, sp. nov.

Brevis, latiusculus, convexus, sordide testaceus, sat nitidus, parce pubescens^ oculis
parvis ; prothorace lateribus rotundatis, crebre punctato, disco obsolete quadri-impresso;
elytris brevibus et latis, seriatim punctatis, interstitio quinto pone basin magis elevato ;
abdomine fortiter, parce punctato. Long, vix 3, lat. vix i^ mm.

COLEOPTERA 461

Closely allied to A, brevis, but readily distinguished by the differences in sculpture.
We have only one specimen, a female.

Hab. Oahu, near Honolulu, August 1900 (no. 785, Perkins). D. S.

EuPETiNUS, gen. nov.

Corpus sat latum. Coxae anteriores parum distantes ; prosternum inter eas nullo
modo protuberans, processu ad apicem tantum minutissime ciliato. Coxae posteriores
distantes. Tarsorum lobis baud magnis. Alae perfectae.

The species assigned to this genus consist of insects of smaller size than Orthosto-
lus, with the prosternal process small and quite destitute of any long hairs at the tip.
The prothorax has always three or four depressions on the disc, but they are variable
in distinctness even in the same species. The elytra too have in most cases several
depressions, but in numerous species these are almost obliterated. The male pygidium
is not notched or emarginate apically,

The genus Is a most difficult one to deal with owing to the great variability of the
species and to their being extremely closely allied. Colour is especially variable, and
cannot be relied on. A curious variation occurs in several species, inasmuch as the
black colour of the elytra and abdomen may be concentrated chiefly on the anterior
parts, leaving the hinder portion of the two parts more or less clear yellow. In this
variation the elytra are often black in front and yellow behind ; we have consequently
spoken of this form as van dimidiatus (PI. XIV. fig. 20). In some of the extreme
forms of this variation the abdomen has become entirely yellow.

It is impossible to tabulate the species of this genus in any way that would be
practically useful, and the only sections we can establish depend on the width of the
expanded lateral margin of the elytra. It is hard to draw the line exactly between
these two sections, but a number of species have these margins conspicuously broad ; and
we have placed these species, nos. 18 — 24, at the end of the genus. It is possible that
observation of the habits of the species may throw some light on the subject of these
obscure forms, which we feel we are leaving in a very unsatisfactory state. D. S.

(i) Eupetinus insignis, sp. nov.

Nigricans, pedibus antennarumque basi prothoracisque marginibus fusco-ferruglneis,
elytris abdomineque flavo-ferrugineo-variegatis, nitidus ; prothorace fortiter transverso,
antrorsum angustato, angulis posterioribus fere rectis, disco quadri-impresso, sat obsolete
punctato ; elytris parum inaequalibus, posterius flavo-ferrugineis, sulcis punctatis, inter-
stitiis minute punctatis ; abdomine parcius punctato. Maris segmentum lerminale
subtruncatum, angulis late rotundatis. Long. corp. 4 — 5 mm. ; lat. corp. \\ — 2 mm.

The pygidium in both sexes is covered with a minute but distinct reticulation : the
punctures are few and the hairs that rise from them short. The last ventral segment
also is scantily punctuated. The male supplementary segment is nearly truncate, only

462 FAUNA HAWAIIENSIS

slightly rounded in oudine. The male pygidium is rather long and narrowed, sub-
truncate, slightly rounded ; female pygidium somewhat broader.

The contrast between the dark colour, and the lighter yellowish area on the
posterior part of the elytra, and the small light mark at the base of either elytron near
the scutellum, which forms the van dimidiatus of allied species, is here very marked.
The pygidium also is much lighter in its basal and lateral portions. A single male from
Waianae differs in being smaller than the other specimens, and in having its elytra and
pygidium almost uniformly dark, the light areas being much reduced. Four specimens.

Hab. Oahu. Waianae mts., over 3000 ft., iv. 1892 (no. 3); Mokuleeia, iv. 1901
(no. 752, Perkins). H. S.

(2) Eupetinus obscurus, sp. no v.

Nigricans, prothorace ad angulos testaceo, pedibus antennarumque basi fusco-
ferrugineis, crebre punctatus, leviter nitidus. E. insignis affinis, sed pygidio crebrius
punctato, et maris segmento terminale baud subtruncato, parum acuminato. Long.
Corp. circa 4 mm. ; lat. corp. circa i^ mm.

This species differs from E. insignis in having the pygidium and last ventral
segment coarsely punctuated, and the male supplementary segment somewhat acuminate,
rather rounded. It is distinguished from E, subaper by its generally larger size, by
the transverse striation on the interstices of the elytra being much less marked, and
the less sharply acuminate male supplementary segment. The male pygidium is
truncate with rounded angles, scarcely emarginate in the middle ; female pygidium
broader, and rounded.

Two male specimens show an approach to the dimidiatus form in a slight lightening
of colour on the posterior part of the elytra. One female is lighter than all the other
specimens, being ferrugineous ; it is perhaps scarcely mature. We have seven specimens.

Hab. Oahu, Wahiawa, iv. 1901 (nos. 750, and 660, Perkins). H. S.

(3) Eupetinus derasus, sp. nov.

Sat latus et depressus, subopacus, fusco-niger, prothorace pygidioque fusco-testaceis,
antennarum basi pedibus sordide testaceis, elytrorum parte apicali (interdum }) late
testacea ; prothorace dense obsolete punctato, lateribus rotundatis, angulis posterioribus
obtusis ; elytris parum inaequalibus, punctato-striatis punctis parum discretis ; abdomine
parce subtiliterque punctato. Long. 4^^, lat. if mm.

This is one of the larger forms of the genus, and is distinguished by the very
obsolete sculpture of the thorax ; this too has strongly rounded sides with very obtuse
hind angles. The colour of the elytra is that of the dimidiatus form. We have only
one specimen — a male.

Hab. Kauai, Makaweli, 2500 ft., 11. 1897 {^^* 7^h Perkins).

COLEOPTERA 463

(4) Eupetinus subaper, sp. nov.

Fusco-ferrugineus plus minus ve infuscatus, an tennis fuscis, pedibus testaceis, leviter
nitidus, vix aeneo-micans, crebre punctatus, vix dense pubescens. E, apro affinis, sed
angustior, prothorace ad latera minus rotundato anguHsque posterioribus minus argutis ;
elytris ad latera minus explanatis. His inaequalibus, sulcis punctatis, interstitiis parum
latis trans verseque striatis ; abdomine acuminate, pygidio crebre punctate. Long. corp.
3 — 4^mm. ; lat. corp. i^ — if mm.

This species appears to be very closely allied to both of the two very distinct
forms, E, aper and E. omalioides. It differs from the former in the characters
mentioned in the diagnosis, and from the latter in those given under the heading of
that species ; it has a broader margin to the elytra and is therefore placed at the head
of the second section.

The male supplementary segment is somewhat acuminate, slightly rounded at the
sides, fringed with long hairs. The male pygidium is rather narrow at the apex,
truncate with rounded angles, slightly emarginate ; female pygidium broader and more
rounded. The pygidium in both sexes is much more coarsely punctuated and more
pubescent than in E, omalioides. The female last ventral segment is fringed with long
hairs.

In both sexes the specimens in colour vary considerably from lighter to darker,
and some are of the van dimidiatus form.

A single dark male differs from the rest in having its supplementary segment not
acuminate but rounded ; in this particular it resembles E, omalioides, but in others,
especially in the coarse punctuation of the pygidium, it agrees with E, subaper.
Ninety-one specimens.

Hab. Oahu. Apparently found frequently, and sometimes in the same situations
as E. omalioides', Konahuanui Ridge, xii. 1900 (no. 783): many from mountains near
Honolulu ; *' on strong-smelling introduced creeper " ; ** on Pipturus trees " ; '' on Pipturus
covered with stinking creeper, probably nearly all from the creeper"; *'from a deep
dark ravine, on dead plants"; &c. (Perkins). H. S.

(5) Eupetinus impressuSy Sharp.

Brachypeplus impressus Sharp, Tr. ent. Soc. London, 1878, p. 135.

Brachypeplus inaequalis Sharp, T. c. p. 1 36.

The original diagnosis is "Sat latus et elongatus, testaceus, irregulariter plus minus-
ve infuscatus, subaeneo-micans, nitidus parce pubescens ; prothorace transverse, an-
trorsum vix magis quam posterius angustato, disco profunde tri- vel quadri-impresso ;
elytris inaequalibus, striatis ; abdomine sat crebre distincte punctate. Long. 3 mm. ;
lat if mm."

F. H. III. 60

464 FAUNA HAWAIIENSIS

This and the forms alHed to it are amongst the most difficult of the Hawaiian
Coleoptera. I expressed my doubt when describing B, inaequalis as to its proving
distinct from B, impressus, and I am now convinced that it is only a pale form — I had
only one specimen — in other respects finely developed — it has the two sides of the thorax
of different shapes. E. impressus is not only very variable, but is also very closely
approached by several other species ; it is indeed so closely connected with various
other forms that it might reasonably be considered as giving origin to them. It is
distinguished from E, striatus by the less distinct sculpture, which is less dense on the
thorax, so that the surface is more shining. The surface of the elytra is very uneven,
and the punctuation of the pygidium very slight ; a specimen not exhibiting these
characters cannot be named E, impressus,

Var, dimidiatus, van nov. A series of about 20 specimens have the basal portion
of the elytra dark — nearly or quite black — and the apical portion pale testaceous, the
line of division between the two colours being not straight but irregular (Plate XIV.
fig, 20). One specimen of this colour variety from Waianae is so aberrant that it may
prove to be another species.

The species varies so much in colour that it is not possible to treat this variety as
a species ; especially as a similar variation occurs in several of the other species, though
in some cases not in so striking a manner.

We have altogether about 228 specimens of E. impressus.

Hab. Oahu, Maui, Molokai, Kauai. — Oahu ; the great majority of specimens
are from this island; mts. near Honolulu, Koolau range, back of Tantalus (on Pipturus,
&c.), Wahiawa ; Waianae mts. 2000 — 3000 ft, a single specimen (no. 670). — Maui;
Jao Valley, West Maui, three specimens (no. 349). — Molokai, 4500 ft., one specimen
(no. 141). — Kauai: Makaweli, 2500 ft.; Halemanu, 4000 ft; Koholuamano; mts. above
Waimea, 4000 ft., from various trees and flowers of ''haha," &c. (nos. 256, 631, 703,
&a, Perkins). D. S.

(6) Eupetinus hawaiiensis, sp. nov.

Minus latus et depressus, fuscus, antennarum basi pedibusque fusco-testaceis, elytris
inaequalibus, guttis testaceis ornatis, margine laterali auguste explanato ; prothorace
fortiter transverso, parum profunde rugoso-punctato ; angulis posterioribus leviter
obtusis ; pygidio subtiliter punctato. Long, 3^ — 4 mm. ; lat. i\ mm.

Closely allied to E, impressus, but larger and darker in colour, with a narrower
outstanding margin to the elytra ; the elytra usually darker in colour, but with the
yellow spots formed by the elevated parts more definite and distinct : and the thorax a
little longer.

Almost equally close to E, striatus, but with the sculpture of the thorax less dense
and rugose, and that of the pygidium finer. The species varies a good deal, but the
variation is not similar to that of E. impressus or of E. striatus. The specimens from

COLEOPTERA 465

Kilauea and the four from Hilo come nearer to the Oahuan E, impressus, than do the
specimens from Kona, these being distinctly nearer to E. striatus. One specimen from
Kona is however of the Kilauea form ; it is no, 201 and was found at 3000 ft. in
October, 1892. None of the other form were found with it Twenty-eight specimens
of ^. hawaiiensis have been procured. I have treated the Hilo form as the type of the
species,

Hab. Hawaii. Above Hilo, 1800 ft. (no. 558); Olaa ; Kilauea; Kona, 2500 —
4000 ft., from decaying Lehua tree (no. 283) ; beaten from various trees (no. 217), &c.
(Perkins). D. S.

(7) Eupetinus priscus, sp. no v.

Nigricans, nitidus, limbo pedibusque sordide testaceis (antennae desunt); prothorace
fortiter punctato, angulis posterioribus argutis vix obtusis ; elytris inaequalibus, sat
profunde striatis, striis subtiliter punctatis ; abdomine sat crebre, subobsolete punctato.
Long. 4, lat. if mm.

This insect cannot be referred to E, impressus, as it is larger, and has a longer
thorax. I have therefore given it a name, although we have received only a single
mutilated individual, a male.

Hab. Kauai, high plateau, August 1896 (Perkins). D. S.

(8) Eupetinus striatus, Sharp.

Brachypeplus striatus Sharp, Tr. ent. Soc. London, 1881, p. 515.

This is usually a dark-coloured and obscure species ; it has coarsely sculptured
thorax and deeply striate elytra with narrow interstices, and narrow lateral margins, a
short thorax, a good deal narrowed behind, and with slightly obtuse hind angles.

In Hawaii it varies a good deal in size, but not very much in other respects. From
Oahu we have a large series of about 1 1 9 specimens, very variable in colour and looking
at first sight quite different from the Hawaiian series, but I am unable to find any
means of distinction. Some of these specimens are almost entirely yellow, others have
black marks to a quite variable extent. And in some specimens the colour is similar to
that of the Hawaiian individuals.

Hab. Hawaii, Oahu, Maui. — Hawaii: Olaa, Kilauea, Hilo 1800 — 2000 ft. —
Oahu: Konahuanui Ridge (no. 810), Wahiawa, Mokuleeia, mts. near Honolulu,
Waianae mts, (no. 547). — Maui, Haleakala (nos. 772, 826, Perkins). D. S.

(9) Eupetinus bicolor, Blackburn.

Brachypeplus bicolor Blackburn, Tr. Dublin Soc. iii., 1885, p. 137.
*' Sat latus, nitidus, piceo-niger ; pedibus, thoracis abdominisque lateribus et gutta
circa elytrorum suturam magna apicali, ferrugineis ; prothorace transverso, lateribus sat

60 — 2

466 FAUNA HAWAIIENSIS

rotundatis parum explanatis, disco tri- vel quadri-impresso ; elytris inaequallbus obscure
striatis, striis sat fortiter punctatis ; abdomine fortiter sat crebre punctato. Long.
3j mm."

** A single specimen was taken under the bark of a tree on Mauna Loa, Hawaii,
at an elevation of nearly 5000 ft."

We have not received this species. It appears to be nearest to E, strtatus. It is
shining, remarkably dark in colour, with a red mark on the elytra on the suture just
before the tip. The segments of the abdomen are shining, and the punctures, though
distinct, are remarkably definite.

Hab. Hawaii, Mauna Loa, 5000 ft. (Blackburn). D. S.

(10) Eupetinus sulcatus, sp. no v.

Nigricans, marginibus ferrugineis, elytris plus minusve ferrugineis, antennarum basi
pedibusque fusco-ferrugineis, leviter nitidus, subtiliter sed parum conspicue pubescens ;
prothorace transverso, antrorsum parum angustato, posterius fortiter angustato, angulisque
posterioribus fortiter argutis, ad latera explanato, disco obsolete quadri-impresso, dense
punctato; elytris obsolete impressis, ad latera explanatis, marginibus posterioribus curvatis,
sulcis argutis profundisque punctis magnis, interstitiis plus minusve transverse striatis,
fere impunctatis : abdomine crebre punctato. Long. corp. 3 J mm. ; lat. corp. if mm.

This species is characterised by the remarkable shape of the prothorax, the sides
of which curve strongly inwards posteriorly, and then curve outwards again considerably
to the sharp posterior angles. The male supplementary segment tapers, but is some-
what rounded apically. The pygidium in both sexes is coarsely punctuated ; that of
the male is truncate with rounded angles, slightly emarginate in the middle ; that of the
female broader and somewhat rounded.

The pubescence on the elytra is in places aggregated into little tufts like those of
certain species of Orthostolus {O, sordidus, O, guttatus). There is a lightening in colour
not only on the margins of the elytra, but also in a small patch on either side of the
scutellum, and to some extent on the inner posterior portions of the elytra, as in allied
species. Eleven specimens.

Hab. Molokai. Head of Pelekunu, viii. 1893 (^^- 165) ; mountains 3000 —
4000 ft., V. and VI. 1893 (Perkins). H. S.

(11) Eupetinus curtus, sp. nov.
Nigricans, marginibus pedibusque fusco-ferrugineis, elytris guttis fusco-ferrugineis,
leviter nitidus, subtiliter sed parum conspicue pubescens. E, sulcati affinis ; sed
prothorace antrorsum minus angustato, angulis anterioribus argutioribus antrorsumque
magis extensis, posterius baud fortiter angustato, angulis posterioribus fere rectis ;
et elytrorum sulcis minus eis E. sulcati profundis, interstitiis latis, laevigatis, fere
impunctatis. Long. corp. 3^ — 3f mm. ; lat, corp. i\ — if mm.

COLEOPTERA 467

This species is distinguished from E, sulcatus by the shape of the prothorax, and
by the less deep furrows of the elytra. The interstices of the latter also are flattened
and somewhat broad, not so ridge-like as those of E, sulcatus. Otherwise the two
species are much alike ; in both the light colour of the margins forms rather broad and
conspicuous areas at the angles of the prothorax. The pubescence is aggregated into
tufts on the elytra.

The pygidium is coarsely punctuated in both sexes ; that of the male is truncate or
subtruncate with rounded angles, very slightly depressed at the middle of the posterior
margin ; that of the female somewhat broader, either rounded, or truncate with rounded
angles and a very slight depression in the posterior margin. The male supplementary
segment tapers more or less, but is rounded apically, fringed with long hairs.

Van dimidiatus. In the Maui specimens this colour variety, described under
E, impressus, is present in a strongly-marked form in both sexes. 132 specimens.

Hab. Maui, Molokai. — Maui ; all from Haleakala, 3000 — 5000 ft. — Molokai ;
mts. 3000 — 4000 ft., ** highest forest" (no. 158), &c. (Perkins). H. S.

(12) Eupetinus obsoletus, Sharp.

Brachypeplus obsoletus Sharp, Tr. ent. Soc. London, 1881, p. 515.

'* Parum latus, depressus, opacus, brevissime pubescens vel setulosus, fusco-rufus ;
prothorace dense subrugulose punctato, disco parum distincte quadri-impresso, angulis
posterioribus rectis ; elytris subaequalibus, regulariter seriatim et fortiter punctatis,
interstitiis planis; abdomine opaco, dense subobsolete punctato. Long. 4^, lat. if mm."

This was originally diagnosed by me from a single specimen of the female sex.
The diagnosis should be amended as regards the sculpture of the elytra, the striation of
which is remarkably deep, so that the punctures in the striae are indistinct ; the in-
terstices are narrow. This correction is of importance because of the discovery of the
following species, E, sculptus, which is closely allied to E. obsoletus but has the
punctures in the striae distinct.

The male has the sculpture of the pygidium close and rough, in the form of
longitudinal subeffaced granules,

E. obsoletus seems to be not uncommon in Hawaii. Mr Blackburn found it in the
stems of ferns. We have now about 128 specimens.

Hab. Hawaii. The majority of specimens from Kilauea(no. 656); Olaa; Kaumana
and Amaula; Hilo, 2000 ft.; some from mountains 4000 ft. (Perkins). D. S.

(13) Eupetinus sculptus, sp. no v.

Sat latus, subnitidus, ferrugineus, vel testaceo-ferrugineus, antennis extrorsum
abdomineque medio plus minusve infuscatis ; prothorace fortiter transverso, fortiter
punctato angulis posterioribus leviter obtusis ; elytris striatis, striis fortiter punctatis,

468 FAUNA HAWAIIENSIS

margine laterali angusto, abdomine dense fortiter punctato. Long, fere 4, lat. i^ —
if mm.

This is closely allied to E, obsoletus, but is less dull, with the punctures in the
striae larger, and more easily seen, owing to the striae being less deep, and it has the
punctuation of the pygidium less rough and less granular. It is usually easy to dis-
tinguish, but some of the specimens come very close to E, obsoletus. We have received
about 39 specimens of E. sculptus,

Hab. Hawaii, Oahu. — Hawaii; Hilo (Kaumana, &c.), 1800 — 2000 ft., Olaa. —
Oahu ; a single specimen from Waianae coast (no. 672, Perkins). D. S.

Eupetinus sculptus var. parens, var. nov.

Certain specimens depart considerably from the individuals treated as the type of
E. sculptus, the interstices of the elytra being wider in proportion to the size of the
punctures, the thorax and antennae are rather shorter, and the punctuation of the
abdomen more scanty. The coloration is more variegate, and in some cases assumes
the *' dimidiatus" form in a marked manner. This variety of sculptus approaches
E. spretus, I have an immature example found in the Waimea Mountains of Kauai,
that I cannot distinguish from the Hawaiian specimens.

Hab. Hawaii: Kona, 3000 ft., x. 1892 ; Olaa, ix. 1896 (Perkins).

We have received six specimens of this variety, in addition to two found by
Mr Blackburn and now in the British Museum. One specimen from Olaa and one
from Kona are of the dimidiatus form.

Hab. Hawaii, Oahu, Kauai. — Hawaii: Kona, 3000 ft., x. 1892; Olaa, ix. 1896
(Perkins) ; Mauna Kea (Blackburn). — Oahu ; one specimen from Mokuleeia (no. 752,
Perkins). — Kauai, mountains of Waimea (Blackburn). D. S.

(14) Eupetinus spretus, Blackburn.

Brachypeplus spretus Blackburn, Tr. Dublin Soc. iii., 1885, p. 136.

Latiusculus, niger, flavo-variegatus, abdomine interdum omnino testaceo, antennis
fusco-testaceis, pedibus flavis ; prothorace fortiter transverso, dense punctato, baud
rugoso ; elytris leviter inaequalibus, regulariter punctato-striatis ; abdomine subtiliter
punctato. Long. 3f — 4, lat. if-mm.

This is one of the species of comparatively broad form but with only moderately
broad outer margin to the elytra, and rather stout short legs and strongly transverse
eighth joint to the antennae. The colour is more vivid than usual, the yellow on the
abdomen usually predominates, and in the female the whole abdomen is sometimes pale
yellow. The colour however varies a good deal ; and one or two individuals show a
great deficiency of the black pigment. We have only a small series of twenty-two
specimens.

COLEOPTERA 469

The species was described from Maui by Mr Blackburn. I believe our series
from Hawaii is the same as Mr Blackburn s type, but as this is in bad preservation it
is not quite certain.

Hab. Maui, Hawaii. — Maui ; Haleakala, 4000 ft. (Blackburn). — Hawaii ; Olaa,
Kilauea, above Hilo, 1800 ft. (Perkins). D. S.

(15) Eupetinus omalioides. Sharp.

Brachypeplus omalioides Sharp, Tr. ent. Soc. London, 1878, p. 136.

This species was described from four specimens. We have now a series of 49
individuals. The species is in some respects very close to E, subaper. It differs in
having a much more scanty and delicate pubescence, especially on the pygidium and
last ventral segment, which are far less coarsely punctuated than in E, subaper. It is
a comparatively elongated, smooth, and even species. A few specimens vary in the
direction of E, subaper, in having the pygidium rather more coarsely punctuated. The
elytra frequently have rather larger punctures, and are smoother. E. omalioides differs
from both E, subaper and E, aper in having the male supplementary segment not at all
tapering, but rounded, or truncate in the middle.

The male pygidium is truncate, scarcely emarginate, broader at the end than that
of E. subaper. Female pygidium more rounded than that of E, subaper.

The males as a whole are darker than the females, but one female is the darkest of
all. A few males approach the condition of the var. dimidiatus of allied species, having
the anterior and outer parts of the elytra dark, and the posterior and inner parts of a
lighter, yellowish colour ; and a small light patch at the base of either elytron near the
scutellum.

Hab. Oahu, Hawaii. It is a characteristically FreycinetiaAxdMxwXxig species, being
found in the flowers, at the bases of the leaves, &c. — Oahu; apparently widely distributed,
but not many found together; Waianae mts. about 3000 ft. (no. 547); Konahuanui Ridge
(no. 783); mountains near Honolulu, 2000 and 3000 ft. (Perkins); Blackburn also records
it (Tr. Dublin Soc. in. 1885, p. 230) as occurring in considerable numbers in Oahu, and
notes its preference for Freycinetia. — Hawaii ; recorded from this island, as well as from
Oahu, by Blackburn (I.e.).

(i6) Eupetinus b7'evicollis, sp. nov.

Latus, depressus, fusco-testaceus, nitidus, limbo, abdominis apice pedibusque flavis ;
antennis brevibus, clava nigricante ; prothorace fortiter transverso, haud rugoso, angulis
posterioribus obtusis ; elytris parum inaequalibus, regulariter punctato-striatis ; abdomine
obsolete punctato. Long. 3^, lat. rf mm.

This species has short antennae (PL XIV. fig. 19), with the seventh, eighth and
ninth joints shorter than usual. The lateral margin of the elytra is moderately broad.

470 FAUNA HAWAIIENSIS

We have one specimen, a male. It comes nearest to E. spretus, but appears to be a
smaller and flatter insect, and to be definitely distinguished by the antennae. Varieties
of E. omalioides may resemble E^ brevicollis in colour, but the sculpture is different and
the antennae not quite so short.

Though we have only one example from Waianae, I have no doubt of the dis-
tinctness of this species. An individual from near Honolulu though excessively immature,
and consequently unnaturally pallid and depressed, has the same structural characters
and probably pertains to this species.

Hab. Oahu; Waianae, 3000 ft, i v. 1892; Honolulu, viii. 1900 (Perkins). D. S.

(17) Eupetinus tardus^ sp. nov.

Sat latus, aequalis ; prothorace crebre baud profunde punctato, ad basin angustato,
disco obsolete quadri-impresso, angulis anterioribus parum rotundatis ; elytris baud
profundius sulcatis, ad latera sat late explanatis ; abdomine sat subtile punctato. Long.
Z\ mm.

This species is distinguished by its broad form and relatively even surface, the
elytra being scarcely at all impressed. The thorax is relatively longer than in E. brevi-
collis : its punctures are rather shallow with radiating striae. The antennae are not
conspicuously shortened as in E. brevicollis. Abdominal punctuation not coarse.
Male supplementary segment rounded in outline. We have two specimens, a male
and a female.

Hab, Oahu, Kawailoa, *' from the gulch itself and very far up,'' 1893 (no. 41^
Perkins). H. S.

(18) Eupetinus aper, Sharp,

Brachypeplus aper Sharp, Tr. ent. Soc. Lond., 1878, p. 137.

This species was described from a single very good male specimen from Oahu,
We have now a series of fifty specimens. In the original diagnosis the insect was
described as *'testaceus, fusco-variegatus, opacus, parce pubescens." Our series would
be more correctly described as *' flavo-ferrugineus, fusco-variegatus, leviter nitidus,
crebre pubescens." The colour varies considerably. M^ny specimens are light, with a
dark band down the centre of the prothorax and of the abdomen, and small dark marks
close to the fimbriae of each abdominal segment. The scutellum is almost always dark.
The elytra are usually somewhat darker, in some specimens very dark. In a few
specimens, the distribution of dark and light colours on the elytra is such as to produce
a light patch on the posterior inner part of either elytron, thereby approaching the
condition found in several closely-allied species, and most marked in the var. dimidiatus
of E, inaequalis. The cross-striations between the furrows of the elytra are conspicuous.

COLEOPTERA 471

The male supplementary segment tapers, but is rounded at the extreme apex ; it
bears long hairs. The male pygidium is coarsely punctuate, almost truncate, scarcely
emarginate. Female pygidium broad, slightly rounded,

Hab. Oahu ; mountains near Honolulu, 2000—3000 ft. ; apparently found on
many occasions, but in small numbers (Perkins). H. S.

(19) Eupetinus marginatus, sp. nov.

Sat latus, testaceus plus minusve infuscatus, leviter nitidus, subtiliter pubescens ;
prothorace punctis obsoletis stellatisque, disco obsolete quadri-impresso, transverso,
antrorsum conspicue angustato, posterius parum angustato, angulis posterioribus argutis ;
elytris late explanatis, obsolete impressis, sulcis argutis punctatis, interstitiis parum latis
transverseque striatis. E. apri affinis, sed angustior, tenuius pubescens, prothorace
posterius minus angustato, elytrorum interstitiis minus conspicue transverse striatis.
Long. Corp. circa 3f mm. ; lat. corp. circa \\ mm.

This is a species in which the explanate margins of the elytra are very broad.
The punctures of the prothorax are obsolete and striae radiate from them, producing a
star-like appearance. The male pygidium is truncate with rounded angles ; that of the
female decidedly narrowed and rounded at the apex, more so than in several allied
species. The male supplementary segment tapers, but is rounded at the apex.
Twenty-eight specimens.

Hab. Molokai. 4000— 4500 ft., and over ; '* above Pelekunu," " highest forest,"
&c. (Perkins). H. S.

(20) Eupetinus lanaiensis, sp. nov.

E, marginati peraffinis, sed prothorace breviore, fortiter transverso, minus obsolete
punctato, baud conspicue stellate striato, angulis posterioribus obtusis ; elytris parum
inaequalibus ; abdomine crebrius punctato. Long. corp. 3^^ — 4^^ mm. ; lat. corp.
\\ — if mm.

This species is definitely distinguished from E, marginatus by the shape and
punctuation of the prothorax. The female pygidium is broader at the apex, and
subtruncate, n,ot so rounded. Twenty-six specimens.

Hab. Lanai. 2000 — 3000 ft. ; Halepaakai, &c. (Perkins). H. S.

Eupetinus lanaiensis van mauiensis, van nov.

A single female specimen from Maui differs from E. lanaiensis in having the sides
of the prothorax more sinuate posteriorly, and the pygidium less coarsely and densely
punctuated.

Hab. Maui, Haleakala, 4000 ft. (Perkins). H. S.

F. H. III. 61

472 FAUNA HAWAIIENSIS

(21) Eupetinus dubius, sp. nov.

Latus, brevis, fusco-testaceus, marginibus pedibusque testaceis, leviter nitidus, tenue
pubescens ; prothorace fortiter transverse, ad latera conspicue explanato, lateribus rotun-
datis, angulis posterioribus obtusis, sat rare sed argute punctate ; elytris late explanatis,
inaequalibus ; sulcis haud profundis, punctatis ; interstitiis latis laevibusque ; abdomlne
sat rare punctate. Long. corp. '^\ — 3^^ mm. ; lat. corp. circa \\ mm.

This species is distinguished from E, lanaiensis by its smaller size, and greater
proportionate breadth. The punctuations on the prothorax are further apart ; the
interstices of the elytra broad and smooth, without the transverse striations of E, lanai-
ensis and E, marginatus, and giving a more shining appearance to this species. The
punctuations on the abdomen are less numerous, the pubescence is delicate.

The male supplementary segment tapers somewhat, and is rounded at the apex ;
in one specimen of the dimidiatus form it is blunter, subtruncate. Male pygidium
truncate with rounded angles ; female pygidium broader, more or less rounded.

Van dimidiatus ; this form is present in both sexes. Sixteen specimens.

Hab. Lanai. Halepaakai, vii. 1894 (no. 134); 2000 — 3000 feet (nos. 80, 87, 92,
93, Perkins). H. S.

Eupetinus dudtus, var. ?

A single male of the dimidiatus form from Oahu (near Honolulu, 2000 ft., no. 61,
Perkins) resembles E, dubius, but has the thorax longer and less narrowed in front.

There is also a very immature female from Oahu (iv. 1901, no. 750, Perkins),
with broad margins to the elytra ; the thorax differs in shape from that of E, dubius ;
the species is quite uncertain.

(22) Eupetinus brevicornis^ sp. nov.

Sat latus, nigricans, marginibus testaceis, pedibus antennarumque basi fusco-
testaceis ; antennis brevibus ; prothorace fortiter transverse, ad latera conspicue
explanato, antrorsum fortiter posteriusque parum angustato, angulis posterioribus argutis,
crebre punctate ; elytris impressis, ad latera late explanatis, sulcis punctatis, interstitiis
haud latis ; abdomine crebre punctate, parum conspicue pubescente. Long. corp. 3^^ mm. ;
lat. corp. \\ mm.

A single female from Lanai is close to E, dubiuSy but differs in the shape and
punctuation of the prothorax ; in having the conspicuously shortened antennae ; and
in being more closely punctuated and coarsely pubescent ; especially on the abdomen.
These characters render it quite distinct. The pygidium is coarsely punctuated.

Hab. Lanai, 3000 ft., 11. 1894 (Perkins). H. S.

COLEOPTERA 473

(23) Eupetinus latimargo, sp. nov.

Sat elongatus. testaceus plus minusve infuscatus, leviter nitens, parce pubescens ;
antennis sat brevibus ; prothorace fortiter transverse, angulis anterioribus et posterioribus
argutis, disco obsolete quadri-impresso, sat rare punctate ; elytris latius explanatis,
obsolete inaequalibus, sulcis punctatis baud profundis, interstitiis latis laevibusque ;
abdomine tenuissime pubescente, punctis minutis sat raris. Long. corp. 4^ mm. ; lat.
corp. if mm.

We have two specimens, both females, from Maui. In general form, the shape
of the prothorax, and the character of the punctuation, sculpture and pubescence they
closely resemble E. omalioides, but are readily distinguished by the much greater breadth
of the explanate margins of the elytra, which here reach their highest development.
The impressions on the thorax and elytra are very slight, and the insect has a smooth
and even appearance, as has E, omalioides. The antennae are shorter than in many
specimens of the latter.

Hab. Maui, Haleakala, 3000 ft. (Perkins). H. S.

(24) Eupetinus laevigatus, sp. nov.

Conspicue latus, leviter nitidus, tenuius parciusque pubescens ; colore varians, aut
niger marginibus ferrugineis, aut ferrugineus plus minusve infuscatus, pedibus anten-
narumque basi fusco-ferrugineis ; pedibus sat crassis ; prothorace transverse, parum
quadrangular!, anterius posteriusque parum angustato, angulis posterioribus obtusis,
crebre punctate, disco interdum obsoletius quadri-impresso ; elytris latius explanatis,
obsoletius inaequalibus, sulcis punctis magnis, interstitiis laevibus ; abdomine subtile
punctate. Long. corp. 3^ — 4 mm. ; lat. corp. if fere 2 mm,

PI. XIV. fig. I, ^.

This very variable species is characterised by being short, smooth and shining, and
very scantily pubescent. The legs are somewhat thick. The broad margins of the
elytra reach a degree of development as great as those of E. latimargo. The male
supplementary segment is rounded ; male pygidium truncate with rounded angles,
female pygidium rounded and somewhat long. The amount of punctuation and pubes-
cence on the abdomen varies considerably.

The var. dimidiatus is present.

Van vittatus. In two males the distribution of light and dark colour on the elytra
differs from that in var. dimidiatus. The colours are arranged in longitudinal bands.
The explanate margins are light, as in all other specimens ; within the margin is a broad
dark band, then a narrower light band, then a narrow dark band running along by the
suture. Twenty-six specimens.

Hab. Maui. West Maui mts., 4000 ft, from Freycinetia (no. 368) ; Haleakala
2000 and 3000 ft. (nos. 772, 809, 826, 845, Perkins). H. S.

61 — 2

474 FAUNA HAWAIIENSIS

Eupetinus laevigatus var. tnolokaiensis, var. nov.

Elytrorum margines angustiores, Prothorax magis elongatus.

Two small female specimens from Molokai differ in the above respects from the
Maui specimens. It is possible that if we had a larger series, this would prove to be a
distinct species.

Hab. Molokai; mountains, above 3000 ft. (nos. 177 and 179, Perkins). H. S.

Nesopeplus, gen. nov.

Prosternum mox pone coxas deorsum curvatum. Elytra margine externo baud
explanato.

The members of this genus are readily distinguished from Gonioryctus by their
smaller eyes which are finely faceted, by the less angulate antennal grooves and the
smaller tarsi. They come much nearer to Nesopetinus^ in which genus the prosternal
process when seen in profile (PL XIV. fig. 16) appears to be somewhat prolonged
behind the insertion of the coxae, and with its apex but little directed upwards ; and
when seen from behind shows a free edge (PL XIV. fig. 18), whereas in Nesopeplus the
process is curved upwards immediately behind the coxae (PL XIV. fig. 15) and w^hen
seen from behind presents a short vertical face (PL XIV. fig. 17). The character is not
a very good one, as there are some differences in each of the genera both as to the
curving upwards of the process, and as to its length.

Nesopeplus and Nesopetinus may be further characterised as follows. The apex
of the male pygidium has more or less of an emargination. This ranges from an
extremely shallow, hardly noticeable, sinuation, to a deep definite notch ; and the apical
angles vary in form from rounded and not at all produced in the former case, to definite
tubercles or sharp produced teeth in the latter. The males of Eupetinus do not have
the pygidium emarginate. Nesopeplus and Nesopetinus also lack the four definite im-
pressions on the thorax, and the impressions on the elytra, so frequent in Eupetinus
and its allies : the elytra also, though almost always seriately punctuated, lack the very
definite longitudinal furrows of Eupetinus, and their lateral margins are not expanded
as in that genus. The whole form of the insects is much smoother, and usually more
convex, than in Eupetinus, and the thorax is frequently less strongly transverse and
less angular. Nesopeplus and Nesopetinus are also characterised by more or less of a
brassy lustre ; and by delicate pubescence, also almost always brassy-lustred, ^nd not
aggregated into definite tufts as in several species of Orthostolus, &c.

In many species of this genus and Nesopetinus, sexual dimorphism is exhibited
also in the form of the thorax ; that of the male being very distinctly broader and more
closely-punctured than that of the female.

The species of this genus defy attempts at tabulation. The following division into
groups, though very unsatisfactory, may possibly be of some little assistance.

COLEOPTERA 475

Group 1. Thorax distinctly transverse, laterally explanate, and with lateral
margins' not at all sinuate before the hind-angles. Male pygidium with a definite but
shallow notch, and the angles forming short teeth (PI. XIV. fig. ri b). Species i — 6.

Group 2. Thorax usually distinctly transverse, its lateral margins not at all
sinuate. In all cases where the male is known, the pygidium is not notched, at most
very shallowly emarginate, with very blunt rounded apical angles (PL XIV. fig. 8^).
Species 7 — 15.

Group 3. A number of forms which cannot well be placed in the other groups.
Thorax very variable in form, but usually longer in proportion to its breadth than in
Groups A and B. Its sides not sinuate. Male pygidium (except in no. 19, N. testaceipes)
with a definite notch, the angles usually forming sharp teeth (PI. XIV. fig. i\b).
Species 16 — 25.

Group 4. Thorax much longer, often almost as long as broad : its lateral margins
in varying degree sinuate before the hind angles, which are definite, not blunted. Male
pygidium (except in no. 32, A^, ater) with conspicuous notch and the angles forming
sharp teeth. Species 26 — 32.

Group 1.

(1) Nesopeplus inauratus, Sharp.

Brachypeplus inauratus Sharp, Tr. ent. Soc. London, 1881, p. 508,

Brachypeplus affi^nis Sharp, op. cit. p. 509.

This is an extremely variable species. Coloration goes for nothing in it, as it
varies from nearly entirely black, to being nearly completely yellow-red; and the forms
with spots and marks are very numerous. The male usually has the thorax a little
broader and more densely punctured than the female, but this sexual character is like-
wise variable, and there is also a good deal of variation in the thoracic punctuation of
the female.

The species seems to be abundant in Hawaii, from which island we have a series
of about 380 specimens. The insect being so protean I am unable to distinguish
N, affinis even as a definite variety.

From Nesopetinus celatus and N, scottianus the Nesopeplus inauratus may always
be distinguished by the prosternal process, which is very small, and is bent upwards
immediately behind the front coxae, so that it appears not at all to extend backwards.

Plate XIV. fig. II a shows the male terminal segment The pygidium (PL XIV.
fig. 1 1 b) has a shallow notch and the angles projecting as short teeth ; last ventral
segment with the apical angles slightly projecting (fig. 1 1 c), as in so many species
of the genus. Supplementary segment somewhat rounded. Female pygidium short,
slightly rounded at apex.

476 FAUNA HAWAIIENSIS

Hab. Hawaii. Kilauea : Hualalai, about 5000 ft : Kona, 2000 — 5000 ft, beaten
from Koa, Acacia and other trees, also from flowers and dead wood (Perkins). Also
Mauna Kea, 3000 and 7000 ft., from flowers (Blackburn). D. S.

(2) Nesopeplus collaris, sp. nov,

Rufo-obscurus, prothoracis lateribus, antennis pedibusque flavis ; prothorace haud
fortiter transverso, lateribus rotundatis, anterius fortiter angustato, anguHs posterioribus
obtusis, dense fortiter punctato ; elytris seriatim minus obsolete punctatis. Long. 3,
lat i^ mm.

Similar to A^. inauratus, with a longer thorax more narrowed in front, and more
densely and coarsely punctate. The unique specimen is about the size of the smallest
N. anttcatusy and is perhaps nearer to that species than to N. inauratus, but it has a
more coarsely punctate thorax, with more rounded hind angles. The emargination of
the last dorsal plate of the male is not very deep ; the angles project quite distinctly but
are not sharp.

A single specimen from Molokai is intermediate between the type of N. collaris
and N, curtithorax. It has the thorax shorter and more finely punctured than the type
(Lanai) specimen of N. collaris, thereby approaching A^. curtithorax,

Hab. Lanai, Molokai. — Lanai, about 2000 ft xii. 1893 (no. 92). — Molokai,
3000 feet, 12. VI. 1893 (no. 176, Perkins). D. S.

(3) Nesopeplus curtithorax, sp. no v.

Sat latus, fusco-testaceus, prothoracis lateribus testaceis, subtile pubescens ; pro-
thorace lato, parum curto, antrorsum parum angustato, lateribus explanatis rotundatisque,
disco crebre punctato ; elytris seriatim punctatis. Long. corp. 3^ mm.

A single male specimen from Kauai, in bad preservation, is close to N, inauratus,
but (like N, collaris) has a wider, more ample thorax. The thorax, however, is shorter
than that of A^. collaris^ more finely punctured, and has its sides not quite so con-
spicuously rounded. It is the only species of the inauratus type from Kauai.

Pygidium with shallow notch, teeth on either side short and blunt ; supplementary
segment rounded ; last ventral segment slightly emarginate.

Hab. Kauai, Halemanu, 4000 ft. (no. 507, Perkins). H. S.

(4) Nesopeplus anticatus, sp. no v.

Testaceus, prothoracis disco, elytris plusminusve, abdominisque medio fusces-
centibus ; prothorace minus fortiter transverso, lateribus rotundatis, anterius longius
angustatis, basi fere recte truncata, angulis posterioribus leniter obtusis. Long. 3I,
lat i^ mm.

COLEOPTERA 477

Similar to the paler, more densely and finely punctate varieties of N, inauratus,
but with the sides of the thorax more rounded and more strongly narrowed in front ;
the length of the thorax is rather greater, and it is very densely punctate. The sides of
the thorax are broadly explanate behind.

In the male of this species there is only a slight emargination of the apex of the
last dorsal plate, and the hind angles project very little and are not sharp or tooth-like.
Twenty-five specimens.

Hab. Oahu. Mts. near Honolulu, 2000 — 3000 ft; Konahuanui Ridge xii. 1900;
Nuuanu Valley (Perkins). D. S.

(5) Nesopeplus olindae, Blackburn.

Brachypeplus olinda Blackburn, Tr. Dublin Soc. in. 1885, p. 132.

Fusco-testaceus, vix metallescens, elytris testaceis fusco-variegatis ; thorace lateribus
rotundatis, angulis posterioribus obtusis, crebre punctato. Long. 4 mm.

I think this is the species Mr Blackburn described under this name. It is true
that he says the thorax is not explanate at the sides, while the sides are quite
distinctly explanate ; but I find that his type in the British Museum agrees with our
specimens, though unfortunately it is not in good condition. The male pygidium has
a shallowy notch at the apex with the angles prominent and acute, but not so markedly
as in N, segnis.

The species seems to be very variable and I assign to it a short series coming
from several islands, and differing much as regards coloration. The females too have
the thorax more distinctly punctured than the males.

From both N, segnis and N. anticatus the species differs in the thorax being
less narrowed in front, and more densely punctured. In the structure of the male
pygidium it is intermediate between the two. Forty-five specimens.

Hab. Maui, Molokai, Lanai. — Maui ; Haleakala 4000 — 5000 ft. (Olinda, &c.)
1894 and 1896. — Molokai; 3000 ft. up to highest forest; head of Pelekunu, &c. —
Lanai ; 2000 feet, some labelled " Koele mts." (Perkins). D. S.

(6) Nesopeplus segnis^ sp. nov.

Fusco-testaceus, supra metallescens, antennarum basi pedibusque testaceis ; protho-
race lateribus rotundatis, anterius fortiter angustato, angulis posterioribus obtusis, dense
punctato ; elytris subtilius seriatim punctatis. Long. 3^, lat. 1^ — 1\ mm.

The male has a much denser punctuation of the thorax than the female. The
species comes very near to N, anticatus but has the thorax more strongly rounded at
the sides, and the male characters are distinctly different, the emargination of the
pygidium being deeper and the angles more sharp. This character distinguishes
N, segnis from all the species that are very similar to it, and brings it near to N. bidens,

478 FAUNA HAWAIIENSIS

which has the prothorax differently shaped, and differs in so many details that it
scarcely suggests an alliance with this species. The female pygidium is rather narrow
apically. Five specimens.

Hab. Kauai. Koholuamano ; Makaweli, 2500 ft. ; Halemanu, 4000 ft. ; above
Waimea 4000 ft., from various trees, and flowers of **haha." (Perkins.) D. S.

Group 2.

(7) Nesopeplus vagepictus, sp. no v.

Subparallelus, haud latus, nee depressus, capite thoraceque rufo-obscuris, abdomine
pectoreque nigricantibus, elytris testaceis vage fusco-pictis, antennis pedibusque flavis,
his brevibus et crassis ; elytris seriatim haud fortiter punctatis. Long, 3f — 4, lat.
i-^ mm.

This little insect is somewhat variable as regards the colour of the thorax and
abdomen, but the elytra are always greyish-yellow with numerous indefinite dark marks.
The sides of the thorax are less rounded than usual, the base is straight, the hind
angles not definite, slightly obtuse and rounded ; the punctuation is dense ; on the front
of the thorax in the larger males, very dense. The elytra are dull, with a peculiar
silky lustre, the serial punctuation is fine and regular, but the striae are not depressed,
so that in some lights the sculpture does not show at all ; the spots of dark colour are
vague. The abdomen is less wedge-shaped than usual. The legs very short and thick.
The pygidium of the male (PI. XIV. fig. 8 a) is broad at the tip, not visibly emarginate,
the angles extremely obtuse. The form of the last ventral plate is shown in PL XIV.
fig. 8 b. Supplementary segment broad, rounded. Female pygidium short, rather
narrow and rounded apically. Twenty-four specimens.

Hab. Maui, Haleakala, 3000 ft. (nos. 772, 809, Perkins). D. S.

(8) Nesopeplus molokaiensiSy sp. nov.

Sat latus, haud depressus, capite thoraceque rufis, abdomine pectoreque nigri-
cantibus, elytris testaceis vage fusco-pictis, antennis pedibusque flavis ; elytris seriatim
haud fortiter punctatis. Long. 3^, lat. i^ mm.

A small series of seven specimens from Molokai can be distinguished from the
Oahuan N. vagepictus. The form is a little less parallel, the thorax rather shorter, a
little more narrowed in front, and with more rounded hind angles : the elytral sculpture
is slightly coarser, and in the female the punctures of the thorax are not quite so dense.
The male pygidium is not emarginate, and has very blunt angles. If looked on as a
variation of N. vagepictus it is of interest as being dissimilar from N, roridus which may
almost with equal reason be considered a variety.

Hab. Molokai, Kahanui, viii. 1893 {^o- i53> Perkins). D. S.

COLEOPTERA

479

(9) Nesopeplus roridus, sp. nov.

Dense punctatus, evidenter pubescens, haud nitidus, niger, antennarum basi
prothoracisque marginibus flavis, elytris flavo-variegatis, pedibus testaceis, plus minusve
fuscescentibus ; elytris minus obsolete sculpturatis. Long. 3 — 4, lat. i^ — i^ mm.

This is really very closely allied to N, vagepictus, though looking different on
account of the dark colour. The antennae are yellow, with the club black. The upper
surface has a more or less slightly metallic tinge, and the sides of the thorax are narrowly
yellow ; except for this the insect looks blackish though there are obscure yellowish
marks on the elytra. The thorax in the male is extremely densely punctured and
quite dull, in the female the punctuation is not quite so dense. The elytra have a
rough appearance, the striae being slight but sufficient to interfere with the regularity
of the surface, and the punctures are not very minute. The legs are sometimes nearly
clear yellow and at others blackish. It is difficult to distinguish the male and the
female by the pygidial structure, the male pygidium not being emarginate, but the male
is often very different from the female by the larger size, broader thorax, and the
very dense punctuation of it and the head ; the female has the legs thinner than the
male.

The above description is taken from Kauai examples which are the most distinct.
The small series from Maui does not differ much from the Kauai examples. From
Lanai there are two examples, one of them very immature, the other in bad preser-
vation ; they appear to come nearer than the others to N, vagepictus.

The series from Oahu consists of 24 examples, 18 from Waianae of small size,
six from the Kaala mountains and other localities. In these specimens the colour is
variable, but the dark pigmentation is less than in the Kauai exponents. There are
also three specimens, from the Waianae mountains, which are of the largest size of
the species, and are specially deficient in dark coloration, but I can find no definite
evidence of anything more than variation.

Hab. Kauai, Maui, Oahu, Lanai. — Kauai : Halemanu, 4000 ft. ; above Waimea ;
a series recorded from "high plateau''; Sec. — Maui: Haleakala, 5000 ft., Olinda, 3000
— 4000 ft., woods below Olinda. — Oahu : a series of small specimens from Waianae mts.
(lee side) 2000 — 3000 ft 11. 1896 (nos. 541, 670) ; the three large specimens also from
the Waianae mts. '' beaten from flowers and branches and from inside fruit of isolated
tree," iv. 1892 ; other specimens from Kaala mts. 3000 ft., and from Mokuleeia. —
Lanai ; 2000 feet. — (Perkins.) D. S.

( I o) Nesopeplus fallax, sp. nov.

Rufus, antennis pedibusque testaceis ; parce pubescens, sat nitidus, thorace minus
fortiter transverso, lateribus parum rotundatis, fortiter punctato, pone medium obsolete
bi-impresso; elytris seriatim subtiliter punctatis. Long. 3^, lat. i;J^ mm.

F. H. III. 62

48o FAUNA HAWAIIENSIS

We have four specimens of this obscure species. By the male characters it comes
nearest to N. vagepictus, but the prosternal process is a little more prominent and there-
fore the species is an approximation to Nesopetinus, like N. abnormalis and others in
a similar condition. I expect it will prove merely to be an ally of N, vagepidus with
slightly different prosternum. The thorax is narrow, slightly narrowed in front, very
little explanate at the sides, the hind angles nearly rectangular, the punctuation coarse,
in front denser and finer, everywhere so dense as to make the surface dull except for
a few larger interstices along the middle ; the two larger depressions are very shallow.
The serial punctuation of the elytra is very fine, and there is a scanty fine punctuation
on the interstices which are a little shining. The male pygidium is extremely slightly
emarginate, with very obtuse angles.

An immature example of the female sex probably belongs to this species ; it has
a little less punctuation on the thorax as is the case with many other species.

Hab. Maui. Haleakala, 3000 ft. (no. 809) and 5000 ft. (no. 615) (Perkins). D. S.

(11) Nesopeplus Jloricola, Blackburn.

Brachypeplus fioricola Blackburn, Tr. Dublin Soc. in. 1885, P- i34-
Latus, sat convexus, prothorace fortiter transverso, antennis angustato, fortiter
punctato ; elytris subtiliter punctatis, absque punctis seriatis. Long. ^\, lat. if mm.

Described from a single specimen by Mr Blackburn : we have now a large series
of this remarkable — though highly variable — species. It may always be distinguished
from every other Nesopeplus by the total absence of the serial punctuation of the elytra.
In colour it varies from black to yellow ; with numerous varieties in the way of pattern
on the elytra. The head is small in proportion to the general width, the eyes are
prominent and have no margin at all behind them. The thorax is much explanate at
the sides behind, with the angles very obtuse, the punctuation coarse, and looking
somewhat like the surface of a file. The male pygidium is not notched at the tip, but
has a perceptible emargination and its angles are very rounded ; in the female the
pygidium is broad at the tip and very gently rounded. We have 197 specimens.

Hab. Kauai. Halemanu, 4000 ft. ; Koholuamano ; Makaweli ; mts. above
Waimea, 4000 ft. ; high plateau : (Perkins) : Waiahale, 2500 ft. (Blackburn). D. S.

(12) Nesopeplus pictus, sp. no v.

Rufo-testaceus, supra plus minusve aenescens, tenuiter pubescens, nitidus, thorace
abdomineque medio nigricante, elytris fusco-aeneis, rufo-variegatis, evidenter seriatim
punctatis ; prothorace fortiter transverso, haud dense punctato. Long. 3^ — 4^^, lat.
i^ — if nim.

This species does not appear closely allied to any other. It is perhaps most similar
to Nesopetinus varius. The form of the prosternal process will not permit the species

COLEOPTERA 481

to be placed satisfactorily in Nesopetinus, and I therefore locate it with the aberrant
Nesopepli that come nearest to Nesopetinus,

It varies a good deal in colour, but the colours are more vivid than usual; the
marks on the elytra consist of longitudinally placed yellow marks, of variable extent, the
largest immediately behind the scutellum. The abdomen may be entirely yellow, or as
the other extreme, blackish, slightly yellow about the margins. The thorax is distinctly
narrowed behind ; the angles there are definite though obtuse ; the explanation of the
sides is less definite than usual The abdominal punctuation is fine and scanty.

The male has the punctuation of thorax finer and denser than the female. The
structure of the pygidium is much the same as it is in Nesopetinus varius, the male
having only an extremely slight emargination of the hind margin, and the angles very
rounded. Eight specimens.

Hab. Hawaii. Kaumana, Hilo, 2000 ft. (no. 697) and Amaula, Hilo, 2000 ft.
(no. 559); (Perkins). D. S.

(13) Nesopeplus abnormalis, sp. nov.

Niger, supra aeneo-micans, prothorace lateribus testaceis, antennarum basi pedi-
busque rufo-obscuris, abdomine subtus interdum rufescente ; prothorace sat fortiter
punctato, bifoveolato ; elytris seriatim subtiliter punctatis. Long, fere 4, lat. if mm.

A rather robust species, with short stout legs ; most like Nesopetinus scottianus,
slightly larger and broader, and bearing two small depressions on the thorax in front of
the base in the middle. The thorax has the base nearly straight, the hind angles
well marked, not at all rounded but slightly obtuse ; the pubescence scanty ; the serial
punctures of the elytra very lightly impressed. The female pygidium is short and
broad, rather narrowed apically. The male has not been found. Eight specimens.

The species is abnormal inasmuch as the prosternal process behind the coxae is
very short ; as its short terminal portion is strongly curved upwards, the insect is better
placed in Nesopeplus than in Nesopetinus,

Hab. Maui. Haleakala, 5000 ft.: in one case is added ''from flowers of tree
Lobelia'' (nos. 358, 359, 369, Perkins). D. S.

(14) Nesopeplus solitariusy sp. nov,

$ minus depressus, fusco-rufus, parce pubescens, sat nitidus, antennis pedibusque
testaceis ; thorace fortiter transverso, elytris angustiore, parce punctato, ante medium
bifoveolato ; elytris seriatim subobsolete punctatis. Long. 3f, lat. i\ mm.

Head small. Thorax considerably narrower than the elytra, but much broader
than long, the sides much narrowed and rounded in front, slightly narrowed behind,
the hind angles well marked, rectangular : the explanation of the sides narrow, but at
the hind angles distinctly broader and quite definite ; the punctuation is scanty and not

62 — 2

482 FAUNA HAWAIIENSIS

coarse, and in front of the middle there are two small, rather deep depressions. The
punctuation of the elytra is fine, remote and indistinct, but its seriate nature is evident.
The abdomen is sparingly punctate. The legs are short The undersurface ferruginous
in colour, with very little punctuation. The pygidium is rather narrow and rounded
apically.

We have only one specimen of this species; it does not appear to be closely
allied to any other, but perhaps comes nearest to N, abnormalis. It has some re-
semblance to Nesopetinus pusillus %, The two foveolae on the thorax are very peculiar,
but I feel some doubt as to their being quite natural.

Hab. Maui, 1900 (no. 817, Perkins). D. S.

(15) Nesopeplus insolitus, sp. no v.

Nigricans, thoraceo piceo-rufo, lateribus dilutioribus, abdomine flavo, pedibus
sordide rufis ; parce subtiliter pubescens, nitidus ; thorace basin versus angustato,
angulis posterioribus obtusis, haud rotundatis ; elytris seriatim subobsolete punctatis ;
abdomine parce punctato. Long. 3^^, lat. i^ mm.

We have only a single example of this species, it is a female, and probably a
variety in colour. It is however obviously different from A^. inauratusy and as it does
not apparently come very near any other species I have given it a name. The posterior
angles of the thorax are more definite than in N. inauratus and the abdomen more
sparingly punctate. The pygidium is short, rather narrow apically.

Hab. Oahu, near the head of the South branch of Kawailoa gulch, iv. 1893
(no. 239, Perkins). D. S.

Group 3.

(i6) Nesopeplus serratus, sp. no v.

Flavo-testaceus, fusco-variegatus, subtile pubescens, antennis pedibusque testaceis ;
prothorace transversim quadrato, angulis obtusis ac parum rotundatis, lateribus explanatis
parumque rotundatis, disco crebre punctato plus minus ve infuscato ; elytris seriatim, vix
confuse, punctatis ; abdomine infuscato, crebre punctato. Long. corp. 2^ — 3^ mm.

$ segmentum terminale marginibus serratis.

This species is in several ways remarkable. The coloration is distinctive, and not
so variable as it is in many allied forms. The ground colour is distinctly yellowish,
contrasting with darker areas. The thorax is dark, with light lateral margins. The
scutellum is dark. Immediately round its edge, there is a narrow light portion of the
elytra. Just posterior to this, there is on either elytron a dark band running obliquely
forwards from the suture to the base of the elytron, where it turns backwards and out-

COLEOPTERA 483

wards, ending in a patch on the lateral margin in front of the middle ; the rest of the
elytron is light, except for a dark patch at the middle of the posterior border.

The difference between the sexes is considerable, and is parallel to that found
in other members of the genus. The thorax of the male is broad and very closely
punctured, that of the female less closely punctured, usually narrower as a whole and
more narrowed towards the front.

Male pygidium rather short, very rough and coarsely punctured ; with a somewhat
deep, narrow notch ; the teeth on either side stout and incurved ; the margins of these
teeth, and the lateral margins of the last ventral segment, are serrate owing to the
presence of tooth-like projections, and the pubescence projects over the margins, which
therefore are ciliate. The supplementary segment is very slightly emarginate, with a
fringe of long hairs on either side of the emargination (see PI. XVI. fig. 5: in this
figure the hairs are not represented).

The female pygidium is rather short and broad, with a rounded apex. Twenty-
eight specimens.

Hab. Oahu. Waianae mts., 2000 ft. &c., iv. 1892; **on Kukui tree"; ''beaten
from flowers and branches and from inside fruit of isolated trees" (nos. 8, 14, 26,
Perkins). H. S.

(17) Nesopeplus bidens, Sharp.

Brachypeplus bidens Sharp, Tr. ent. Soc. London, 1881, p. 510.

This species was described from a single male found on flowers on Mauna Loa,
at 4500 feet. We now have 16 specimens. The prothorax is stated in the original
description to be '* longer than broad," but in our specimens is distinctly broader than
long ; the sinuation of the lateral margins near the hind angles is extremely slight, and
not always present ; the punctures are fine, numerous, but somewhat obsolete ; sometimes
there are two very slight depressions on the posterior part of the disc. The coloration
is striking ; the prothorax is yellow-testaceous ; contrasted with this, the elytra are very
dark (though some specimens have a yellow patch near the scutellum, sometimes drawn
out along the inner margins), often with a distinct violet reflection ; the abdomen varies
from entirely yellowish to entirely dark. There is a considerable variation in size, from
2f to 3-J mm. in length : the females are on the whole smaller, and all our very small
specimens are of this sex.

The notch in the male pygidium (PI. XIV. fig. \\b \ the notch here appears some-
what too narrow) is broad and somewhat deep, the tooth on either side being narrow
and sharp: outline of last ventral plate shown in PL XIV. fig. 14^: supplementary
segment more or less sinuate, the part on either side of the sinuation rounded and
bearing long hairs. Female pygidium rather narrow at the apex ; the posterior margin
very slightly rounded, and depressed centrally, so that in some positions it appears
emarginate.

484 FAUNA HAWAIIENSIS

Hab. Hawaii. Kona, 3CXX) ft. (no. 201, x. 1892 ; no. 217 '* beaten from various
trees"); Kilauea vi. 1895 (no. 692): Haumana, Hilo, 2000 ft., i. 1896 (no. 697): and
the six very small females all from above Hilo, 1800 ft, xii. 1895 (j^^^s. 558 and 567):
(Perkins). H. S.

(18) Nesopeplus lambianus, sp. nov.

Sat elongatus, aequalis, niger, antennis nigricantibus, pedibus rufo-nigris, nitidus,
plus minusve aeneo- et violaceo-micans, subtile sed parum conspicue pubescens, crinibus
aeneis decumbentibus ; prothorace magno, sat convexo, elytris fere latiore, crebre
punctato, posterius angustato, lateribus fortiter rotundatis posteriusque parum ex-
planatis, angulis posterioribus fere rectis ; elytris convexis, subtile seriatim punctatis ;
abdomine posterius angustato, crebre sed vix dense punctato. Maris segmentum
terminale emarginatum. Long. corp. 3 — 3-^ mm., lat. corp. i^ — 1\ mm.

Plate XIV. fig. 3, ^.

So far as can be judged from our series, this species is one of the most distinct and
least variable. The shape is elegant and characteristic, the prothorax being broad and
the body gradually tapering away posteriorly. The coloration appears to be constant,
but the violet reflection varies in amount, and is sometimes of different shades in
different parts of the body. Male pygidium conspicuously notched, the outline of the
notch rounded, the process on either side moderately prominent ; supplementary segment
remarkable, with a conspicuous notch with rounded outline and on either side a rounded
process covered with long hairs ; posterior margin of last ventral segment slightly
emarginate, fringed with short hairs. Female pygidium rather long and narrow at the
apex, with sides slightly sinuate and posterior margin slightly rounded, and a con-
spicuous apical depression which makes it appear emarginate. The female last ventral
segment has not a bisinuate posterior margin as in N, testaceipes. Thirty-two speci-
mens.

Hab. Hawaii, Kilauea, vii. and ix. 1896, nos. 656 and 685 : a few with no
number, but agreeing with the rest: (Perkins). H. S.

(19) Nesopeplus testaceipes, sp. nov.

N, lambiani afifinis, sed antennis pedibusque testaceis, fortiter aeneo- sed vix
violaceo-micans, pubescentii aure^. Long. corp. 3 — 3f mm.; lat. corp. i-|^ — i-^ mm.

This species is like N. lambianus in general appearance, but distinguished from it
by the characters given above, and by the secondary sexual characters. The male has
the notch in the pygidium very broad and shallow, with no distinct tooth on either side ;
supplementary segment very slightly emarginate, bearing long hairs; last ventral
segment with its posterior margin slightly emarginate and fringed with short hairs.
The female has the pygidium very long and narrowed, apically rounded and without the

COLEOPTERA 485

conspicuous depression of N, lambianus ; posterior margin of the last ventral segment
feebly bisinuate, the central emargination fringed with short hairs, .while the rounded
prominence on either side of it bears a tuft of long hairs rising from slightly behind the
margin.

Fourteen specimens. There is a single very small male from the Waianae
mountains.

Hab. Oahu. Konahuanui Ridge, Koolau Range, Mokuleiia, &c. (nos. 751, 783,
785, 811, 903) ; Waianae, about 3000 ft. (no. 547) : (Perkins). H. S.

(20) Nesopeplus torvus, Blackburn.

Brachypeplus toi^us Blackburn, Tr. Dublin Soc. iii. 1885, p. 133.

This species was described from a single female taken by Mr Blackburn, by beating
flowers, on the Waianae mountains. We have now 27 specimens.

The form is narrow and somewhat elongate, the pubescence conspicuous. The
manner of coloration is characteristic. The elytra have a large dark anterior area, and
a smaller dark area along the posterior margin. These areas extend the whole *width
of the elytron, except for the outer lateral margin, which is light usually throughout its
length, and which sends a broad light transverse band across the elytron between the
dark areas: the light parts are distinctly yellowish, the dark parts almost black. The
thorax and abdomen are dark with lighter margins. Thorax rather elongate, not
conspicuously broader than long, narrowed in front, with sides explanate towards the
hind angles, which are rounded; disc somewhat convex, closely punctured. Length
from 2\ mm. (small female) to 3^ mm. (large male).

Male pygidium with a conspicuous notch and a sharp tooth on either side. Supple-
mentary segment with a median depression or very slight emargination. Female
pygidium long, narrow, tapering, with very rounded apex.

A singW male found at Kawailoa (iv. 1901) differs from the rest in having the notch
in the pygidium broad and shallow, while the teeth on either side of it are very short
and blunt.

A single female from the Waianae mountains exhibits marked variation. The
black colour is greatly reduced; the thorax is uniform reddish-testaceous, and the
elytra are testaceous except for two very small areas, one near the scutellum, the other
at the posterior margin. The thorax is more conspicuously narrowed towards the front
than in other examples.

Hab. Oahu. Waianae, 2000 — 3000 ft., ** found on Kukui tree," *' beaten from
flowers," &c. ; Kaala mts. 2000 — 3000 ft.; mountains near Honolulu; Waialua coast;
Kawailoa: (Perkins). H. S.

486 FAUNA HAWAIIENSIS

{21) Nesopeplus obscurans^ sp. nov.

$ Sat elongatus, subtile pubescens, prothorace fusco-testaceo, lateribus testaceis,
antennis pedibusque fusco-testaceis, abdomine elytrisque nigricantibus, his testaceo-
notatis ; prothorace transverso, antrorsum conspicue angustato, basin versus parum
angustato, angulis posterioribus argutis ; elytris seriatim punctatis. Pygidium longum,
apicem versus conspicue attenuatum, ad apicem rotundatum. Long. corp. 2>\ "^"^^

A single female specimen is distinguished by the curious form of the prothorax and
the pygidium. The prothorax is conspicuously transverse, strongly narrowed in front
and slightly towards the base, with sides rounded and explanate posteriorly, the disc
fairly closely punctured. The specimen does not seem to be clearly allied to any other
species.

Hab. Molokai (Perkins). H. S.

(22) Nesopeplus protinoides, Sharp.

Brachypeplus protinoides Sharp, Tr. ent. Soc. London, 1879, p. 85.

This form was described from a single female, and with this original type was a
male considered by Mr Blackburn to be of the same species. The type was from Maui,
but we have now three specimens from Molokai, which, though varying somewhat from
the type and from one another, appear inseparable from N, protinoides.

The thorax is rather long in proportion to its breadth, slightly narrowed in front,
with sides slightly rounded and explanate towards the base, hind angles obtuse but
definite, and a very obsolete impression on the posterior part of the disc. The punctures
are somewhat distant, but in the female sex rather less so than is the case in
N. latiusculus\ the latter also is a smaller insect, and has the thorax rather more
explanate at the sides, and its lateral margins sinuate towards the base. Our specimens
of N, protinoides have more or less definite testaceous patches on the elytra ; the type
specimen was of somewhat lighter colour altogether. Length, circa 3^ mm:

The female pygidium is almost truncate, with rounded angles, and a median apical
depression which in our specimens is so marked that the sclerite appears emarginate.
The male pygidium has a conspicuous notch, with a prominent tooth on either side, and
the margins very slightly serrate; last ventral segment emarginate; supplementary
segment slightly emarginate. Mr Blackburn's male specimen has the notch less deep,
and differs slightly also in the shape of the prothorax. Description is very unsatis-
factory, owing to smallness of the material.

Hab. Maui, Molokai. — Maui; the type % was from flowers of the Koa tree,
Haleakala, 5000 ft. (Blackburn). — Molokai, 2 % and i ^, "above 3000 ft.," and
**Kahanui" nos. 177 and 153; (Perkins). Blackburn's ^ bears no record of locality.
H. S.

COLEOPTERA 487

(23) Nesopeplus nigricans, sp. nov.

N. protinoides aflfinis, sed prothoracis lateribus magis conspicue explanatis, elytris
magis argute seriatim punctatis, feminae pygidio ad apicem angustiore, ac interdum
emarginato. Nigricans, prothoracis lateribus, antennis pedibusque fusco-testaceis,
nitidus, leviter aeneo-micans, subtiliter sed parum conspicue pubescens; prothorace
transverso, antrorsum angustato, lateribus rotundatis, angulis posterioribus parum argutis,
disco obsolete impresso, sat rare sed conspicue punctato. Long. corp. 2|- — 3 mm. ; lat.
Corp. \\ — i^ mm.

In this species the prothorax is slightly broader, more rounded at the sides, and
more closely punctured in the male than in the female. The punctures on the elytra
form definite lines, more definite in the female than in the male ; and distinguishing the
insect from the original type female of N, protinoides, in which the punctures are far
apart and the lines much less definite.

The female pygidium is long and tapering, convex longitudinally ; apically narrow,
rounded, and sometimes with a central depression or emargination. This distinguishes
the species from N, protinoides. Male pygidium conspicuously emarginate, the tooth on
either side sharp; supplementary segment emarginate; last ventral segment with a
shallow emargination. Seven specimens.

Hab. Hawaii. Kilauea (vii. 1895, no. 568); and one male from Kona, 3000 ft.
X. 1892 (no. 201, Perkins). H. S.

(24) Nesopeplus cognatus, sp. nov.

N, koelensis similis, sed prothorace breviore, testaceo, posterius angustato, lateribus
ad angulos posteriores haud sinuatis, angulis posterioribus parum obtusis. Long,
corp. 2f — 3 mm.

A certain number of specimens from the same localities as N. koelensis have the
prothorax short, somewhat light-coloured, with blunt hind-angles, and with sides slightly
rounded and not sinuate posteriorly. These specimens are thereby quite distinct from
N. koelensis.

The secondary sexual characters appear to offer no important differences from those
o{ N. koelensis. In the male the teeth on either side of the notch are somewhat thick
and blunt; the supplementary segment is conspicuously emarginate. In the female
pygidium the notch is either absent, or, when present, very slight.

Thirty-one specimens.

Hab. Lanai. Same dates and localities as N, koelensis, q.v. (Perkins). H. S.

F. H. III. 63

488 FAUNA HAWAIIENSIS

{25) Nesopeplus sp, ?

In Mr Perkins* collection is a single female specimen which does not appear to fall
definitely within the limits of any of our species. It appears to be closely allied to
N, cognatus but has the thorax proportionately broader and more rounded at the sides,
in that respect approaching somewhat to N, testaceipes. It resembles N. cognatus in
size and coloration and in the form of the pygidium. It is from the Waianae mts.,
Oahu, about 3000 ft. (no. 547, Perkins). H. S.

Group 4.

(26) Nesopeplus koelensis, Blackburn.

Brackypeplus koelensis Blackburn, Tr. Dublin Soc, in. 1885, p. 133.

This narrow and convex species was described from a single male obtained by
beating flowers at Koele, at 2000 ft. elevation. We now have about 1 20 specimens.
The prothorax is characteristically shaped, being convex, rather long in proportion to its
breadth, slightly narrowed in front, with the sides posteriorly sinuate and the hind
angles sharp and definite, almost right angles ; its punctures are not deep, and decidedly
scanty, but vary considerably in number, being distinctly more numerous in the male
than in the female ; there is often a very slight depression on the posterior part of the
disc. On either elytron is a testaceous patch, which varies in extent, being sometimes
much obscured. The punctuation on the abdomen is somewhat scanty. The length
varies from 2| to 3^^ mm.

The male pygidium has a conspicuous notch with rounded outline, and a sharp
prominence on either side ; last ventral segment with a wide shallow emargination
fringed with short hairs ; supplementary segment emarginate with a rounded prominence
on either side of the notch. Female pygidium somewhat narrow, at the apex depressed
and with a rounded emargination (which is variable, being sometimes very slight); last
ventral segment extremely slightly blsinuate.

Hab. Lanai, 2000 — 3cxx) ft. ; mts. near and behind Koele, above Waipaa, &c.,
XII. 1893, I. and II. 1894; Halepaakai, vii. 1894 (Perkins). H. S.

(27) Nesopeplus latiusculuSy sp. no v.

N, koelensis affinis, sed major, et latior ; nigricans, antennis pedibusque prothora-
cisque marginibus fusco-testaceis, elytris plus minusve testaceo-notatis, nitidus, subtiliter
pubescens ; prothorace sat lato, trans verso, disco posterius obsolete impresso, conspicue
sed vix crebre punctato, angulis anterioribus rotundatis, laterlbus posterius explanatis,
parum ad angulos posteriores sinuatis, his argutis fereque rectis ; elytris aequalibus ;

COLEOPTERA 489

seriatim punctatis ; abdomine vix crebre sed conspicue punctato. Long. corp. 2| —
3 mm. ; lat. corp. circa i^ mm.

This species is distinguished from N. koelensis, cognatus, &c., by its slightly larger
size and greater relative breadth. There is considerable variation in colour, also in the
degree of closeness of the punctures ; the latter being decidedly scanty on the prothorax
in some females, as is the case in certain allied forms.

In the male, the emargination of the pygidium is conspicuous, outline of the notch
rounded, the tooth on either side somewhat sharp ; supplementary segment emarginate;
but ventral segment more conspicuously emarginate than in allied forms, the emargina-
tion being deeper and not so broad, and having a somewhat rounded outline. Female
pygidium variable ; sometimes rounded apically and with a distinct central emargination,
sometimes more nearly truncate and scarcely emarginate at all.

Hab. Molokai, 4000 ft. and upwards to highest forest, vi. — ix. 1893 (Perkins).
H. S.

(28) Nesopeplus simzlis, sp. nov.

A\ latzMsculi afifinis, sed parum angustior, prothorace angustiore, lateribus angulis-
que anterioribus minus rotundatis ; hoc antrorsum angustato, lateribus ad angulos poste-
riores sinuatis, angulis posterioribus argutis fereque rectis, disco posterius plus minus ve
impresso ; elytris interdum sat obscure seriatim, parum confuse, punctatis. Maris pygi-
dium ad apicem sat latum, haud profunde ac sat late emarginatum. Long. corp. 2-| —
3 mm. ; lat. corp. circa i J mm.

This species is very closely allied to N. latiusculus, cognatuSy and koelensis. From
the two latter it is distinguished by its larger size and greater width ; in this respect it
comes nearer to the former, from which, however, it is distinguished by the form of the
prothorax and the slightly smaller breadth. Moreover it is separated from all three
species by the form of the male pygidium, which is apically rather broad, the notch
being shallow and the tooth on either side of it but little produced. Male supplemen-
tary segment emarginate ; last ventral with the emargination broad and shallow as in
N, koelensis, not deeper and rounded as in N. latiusculus. Female pygidium sinuate at
the sides, slightly rounded and more or less depressed apically; last ventral segment
scarcely bisinuate, almost truncate.

As in the allied species, the punctures on the prothorax are less numerous in the
female than in the male.

The colour is extremely variable. Testaceous or yellowish patches are usually
present on the elytra, but their extent and outline differ greatly in various specimens.
In some the light colour is so extended on the posterior part of the elytra as to give rise
to conspicuous specimens of the var. dimidiatus, which is so frequent in the genus
Eupetinus.

63—2

490 FAUNA HAWAIIENSIS

Two females from West Maui offer diifficulties ; one is small and very dark, but
appears to be a variety of N. similis. The other, from the Jao Valley, in the form of its
prothorax somewhat resembles N. koelensts ; but the sides of the prothorax are less
sinuate than is usual in either species, so that it is doubtful to which it belongs. Sixty
specimens.

Hab, Maui. Haleakala; Olinda, &c., 5000 ft. and over, iii. and iv. 1894 ^^d x.
1896. West Maui; mountains, 4000 ft, iv. 1894 (^o- 379); ? J^o Valley, iii. 1894
(no. 349, Perkins). H. S.

(29) Nesopeplus confertus, sp. nov.

Sat latus, parum nitidus, subtile sed parum conspicue pubescens, fusco-testaceus,
prothoracis marginibus pedibusque testaceis, elytris testaceo-notatis ; prothorace trans-
verso, ad latera explanato, lateribus conspicue rotundatis, basin versus sinuatis, angulis
posterioribus rectis, margine anteriore et posteriore fere recto, disco crebre punctato,
posterius obsolete transverse impresso ; elytris seriatim punctatis ; abdomine sat crebre
punctato. Long. corp. 3^^ mm. ; lat. corp. i\ mm.

This species is distinguished by the form of the thorax, which is characterised
by the rounded sides, slightly sinuate posteriorly. The transverse impression on the
posterior part of the disc is variable, being well marked in some specimens and hardly
visible in others. The thorax of the female is slightly narrower and less closely
punctured than that of the male. The colour is very variable ; the thorax is usually
lighter, especially at the lateral margins ; the elytra much darker, each with two very
variable testaceous patches, which may or may not be quite distinct from one another.
In some cases these patches are quite absent, and the elytra unicolorous and dark.

The notch in the male pygidium is broad and shallow, the angle on either side
forming a moderately prominent and sharp tooth ; last ventral segment emarginate ;
supplementary segment slightly emarginate. Female pygidium not strongly tapering,
apically deflexed and slightly rounded. Twelve specimens.

Hab. Molokai, 4000 to over 4500 ft (Perkins). H. S.

(30) Nesopeplus puncticollis, sp. nov.

N, conferti afifinis, sed minor, prothorace posterius conspicue angustato, lateribus
basin versus minus sinuatis, disco fortius ac rarius punctato, nigricans, sub-aeneo-
micans, pedibus prothoracisque lateribus fusco-testaceis, elytris testaceo-notatis. Long,
corp. circa '^\ mm.

The thorax is rather strongly transverse, conspicuously narrowed towards the base,
and with the sides only very slightly sinuate ; the punctures on the disc are large and
distant. The specimens also differ from N, confertus in being very dark, with a
strongly contrasting testaceous patch on either elytron, and a distinct brassy reflection ;

COLEOPTERA

491

the transverse impression on the disc is fairly distinct : but it is possible that if we had
more material these characters might prove to be variable. Terminal segments as in
N. confertus. We have only two specimens, both males.

Hab. Molokai, from 4000 to over 4500 ft. (Perkins). H. S.

(31) Nesopeplus sinuatus, sp. nov.

Nigricans, pedibus fusco-testaceis, elytris testaceo-notatis, nitidus, leviter aeneo-
micans, subtile sed parum' conspicue pubescens; prothorace vix transverso, antrorsum
angustato, angulis anterioribus vix rotundatis, lateribus ad angulos posteriores parum
explanatis conspicueque sinuatis, angulis posterioribus fortiter argutis, disco sat rare
punctato posteriusque impresso; elytris seriatim punctatis; abdomine crebre punctato.
Long. Corp. 3 mm. ; lat. corp. i \ mm.

We have only four specimens of this species, in all of which the testaceous patch on
either elytron is sharply contrasted with the dark ground colour. The form of the
prosternal process shows it to be a true Nesopeplus \ but the form of the prothorax,
though respecting the sinuation of the sides near the hind angles and other characters
it is only an exaggeration of what is seen in N, koelensis, approaches the condition of
certain species of Nesopetinus,

In the male, the notch in the pygidium is shallow and broad and the tooth on either
side little produced (on this account the species is placed immediately before N, ater) ;
supplementary segment emarginate ; last ventral segment with a broad emargination.
Female pygidium apically depressed and somewhat broad. The single male specimen
shows no appreciable difference from the females in the comparative scarcity of the
prothoracic punctures.

Hab. Maui. Haleakala, 5000 ft., iii. 1894 and x. 1896 (nos. 358 and 661,
Perkins), H. S.

(32) Nesopeplus ater, sp. nov.

Nigricans, prothoracis lateribus antennarumque basi pedibusque testaceis vel fusco-
testaceis, nitidus, sub-aeneo-micans, subtile pubescens ; prothorace vix transverso,
antrorsum conspicue angustato, basin versus parum angustato lateribusque vix sinuatis,
anguHs posterioribus fere rectis, disco conspicue sed haud profunde punctato, posterius
obsoletius impresso; elytris crebre confuse punctatis, seriebus fere nullis. Long.
Corp. 3 1 mm.

This form has several decided peculiarities. The punctuation on the elytra is
confused; series are visible, but their course is highly irregular. The thorax is rather
long in proportion to its breadth ; there is a trace of a transverse depression on the disc.
The male pygidium is almost truncate, the emargination being reduced to a slight
concave curve in the outline, the angles blunt and not produced. Last ventral segment

492 FA UNA HA WAIIENSIS

almost truncate, supplementary segment scarcely emarginate. In the two specimens,
the posterior, almost vertical, face of the prosternal process is hollowed so that it bears a
very shallow depression. This condition has not been observed in any other species.
We have two specimens, both males.

Hab. Molokai, 4500 ft. (nos. 157, 181, Perkins). H. S.

Nesopetinus, gen. nov.

Prosternum post coxas leniter curvatum. Elytra margine externo baud explanato.

The characters by which this genus is distinguished from Nesopeplus have been
given under that genus.

Nesopetinus includes a variety of forms. The type is a remarkably flat insect.
A^. blackbumi, filipes, and concolor are very distinct forms, and N. tinctus connects the
genus with Gonioryctus,

The species do not lend themselves to any form of tabulation. All that can be
done is to indicate several rather vague groups; and even then a number of species
remain, which cannot be placed in these, and are also too distinct from one another to
form a natural group by themselves.

Group 1. Flattened forms. Thorax distinctly transverse, not strongly convex,
closely punctured, lateral margins not (or at most, in no. 2, N. gonioryctoides, extremely
slightly) sinuate before the hind angles. Male pygidium at most slightly sinuate apically,
with very blunt rounded angles. Species i — 10.

Group 2. Smaller forms, usually very distinct from one another. Lateral margins
of thorax not sinuate before the hind angles. Apex of male pygidium ranging from
shallowly sinuate with very blunt angles, to conspicuously notched with sharp projecting
angles. Species ir — 21.

Group 3. Colour dark. Thorax longer, narrower, less closely punctured, with
hind angles definite and sides slightly sinuate before them. Apex of male pygidium
sinuate or shallowly emarginate, the angles not forming sharp teeth. This group may
be further divided : —

A. Duller, pubescence distinct. Species 22, 23.

B. Strongly shining, black, devoid of pubescence. Species 24.

Group 4. Female pygidium very narrow, long, tapering, and somewhat convex
transversely. Male pygidium notched, the angles forming definite teeth. Species over
4 mm. long. Species 25.

COLEOPTERA 493

Group 1.

(i) Nesopetinus tinctusy Sharp.

Brachypeplus tinctus Sharp, Tr. ent. Soc. London, 1879, p. 83.

Haud latus, parum convexus, subtiHter pubescens, testaceus, viridi-tinctus, elytris
interdum laete viridi-aeneis, interdum nigricantibus post scutellum rufo-plagiatis,
abdomine medio fusco; capite dense punctato, oculis magnis; prothorace magno, dense
punctato, basi fere recte truncata, angulis posterioribus leviter obtusis haud rotundatis.
Long. 3|— 4i mm.

Plate XIV. figs. 13^ and 13^, ^ last dorsal and ventral plates.

There is a difference in the sculpture of the sexes, the prothoracic punctuation being
denser and finer in the female, especially on the anterior part. The male has the
pygidium (PI. XIV. fig. 13^) slender at the tip and with a distinct slight emargination
there, but the sides of the notch do not project as sharp teeth. The female has the
pygidium shorter and a little depressed in the middle at the tip but scarcely notched
there.

The pair originally described consisted of two small individuals. Though the
species is apparently rare we have a series of 30 specimens collected by Mr Perkins,
and exhibiting the variation described above.

The species makes the approach of Nesopeplus to Gonioryctus very evident.

Hab. Oahu. Mts. near Honolulu, back of Tantalus, &c. ; Koolau, high mts.
(**from flower oi Astelia') &c.; Wahiawa; Mokuleeia; leeside of Waianae mts. 3000 ft.
(Perkins). D. S.

(2) Nesopetinus gonioryctoides^ sp. no v.

Haud latus, parum convexus, subtiliter pubescens, fusco-testaceus, elytris viridi-
micantibus, abdominis prothoracisque marginibus testaceis ; thorace (maris) anterius
dense omnium subtilissime punctato, angulis posterioribus rectis. Long. corp. 4 mm.

We have only three examples, males, but as its close relation to N> tinctus fixes its
position unmistakably, I give the species a name. This male differs from the corre-
sponding sex of N, tinctus, by the much finer thoracic punctuation, and by the more
definite posterior angles. The apex of the pygidium is broader, depressed in the middle
with each angle slightly tuberculate.

Hab. Lanai. 2000 and 3000 ft.; one labelled **mts. Koele" (Perkins). D. S.

(3) Nesopetinus metallescens^ Sharp.

Brachypeplus metallescens Sharp, Tr. ent. Soc. London, 1881, p. 511.

** Latiusculus, haud elongatus, depressus, fuscus, supra aenescens, prothoracis mar-
ginibus, antennis pedibusque testaceis, antennarum clava infuscata, subtiliter pubescens,
elytris obsolete punctatis, punctis seriatis subtilissimis." Long. 4 — 5^ mm.

494 FAUNA HAWAIIENSIS

Plate XIV. fig. 6, ?.

Mas. ; capita thoraceque dense subtiliter punctatis, baud nitidis*

Fern. ; capite thoraceque fortiter punctatis sat nitidis.

Van a ; rufo-ferruginea, elytris aeneis.

Van ^; rufo-ferruginea, elytris vel concoloribus vel ad apicem anguste fuscescentibus.

We have a large series, about 200 specimens, of this species ; it varies much in size,
and a good deal in the development of the male characters. The varieties mentioned
above are not connected to the typical form by intermediates, except that one female is
almost entirely testaceous, with the elytra faintly infuscated over a large part, leaving
the disc clear yellow. Two female individuals from Kona have the serial punctures
more distinct than they are in the other specimens.

The male characters of the pygidium are very slight in this species. The apex is
just perceptibly emarginate, but there is no projection of the angles or any trace of
tuberculation there ; the supplementary segment usually projects a little. In the female
the apex of the pygidium is very greatly rounded, being almost straight in the middle.

In addition to the large series above alluded to from Hawaii we have small series
of the species from Lanai and from Molokai.

The series from Lanai consists of one male and seven females. These individuals
have the serial punctuation of the elytra even more obsolete than it is in the Hawaii
form, the colour is darker, the elytra being more indistinctly metallic, and the female
pygidium is a little narrower at the tip. These characters are so slight that I do not
think it is necessary to name the form. The series of 20 specimens from Molokai is
very similar to that from Lanai, except that there is always a larger or smaller patch of
rufescent colour extending from the scutellum backwards along the suture of the elytra,
and in some specimens the elytra are nearly completely yellow. From Maui there is
but one specimen, and it agrees with the Hawaiian typical form.

Hab. Hawaii, Lanai, Molokai, Maui. — Hawaii : Kona, 2000 to over 4000 ft.,
some recorded as obtained from flowers and other parts of Freycinetia, Koa and other
trees; above Hilo 1800 ft; Kaumana, Hilo, 2000 ft.; Olaa (Perkins); Mauna Loa
and Mauna Koa up to 5000 ft., from flowers of Freycinetia and other plants (Black-
burn). — Lanai: 2000 — 3000 ft. (8 specimens). — Molokai; all from Kahanui, 11. (no.
153, 25 specimens). Maui; Haleakala 3000 ft. (one specimen, no. 809, Perkins). D. S.

(4) Nesopetinus discedens, Sharp.

Brachypeplus discedens Sharp, Tn ent. Soc. London, 1881, p. 512.
$ Brachypeplus discedens Sharp, op. cit. 1878, p. 133.
^ Brachypeplus puncticeps Sharp, 1. c.

Though extremely close to N, metallescens this appears to be really distinct. We
have a series of about 88 specimens, and on the whole the individuals are not much

COLEOPTERA 495

more than half the size of N, metallescens. The metaUic colour of the elytra is only
obscure. The thorax is a little straighter at the sides in each sex, so that the explanate
part of the side is narrower, and the punctuation and pubescence are rather finer. In
the male there is a more definite emargination of the apex -of the pygidium. The
female of this species has the serial punctuation of the elytra more distinct than it is in
the male of its own species, or in the female of N, metallesceus.

The van kauaiensis of Mr Blackburn is now found to be a distinct species, q. v.

Hab. Oahu. Mts. near Honolulu 2000—3000 ft. ; back of Tantalus ; Honolulu
end of Koolau range ; Konahuanui Ridge ; Kawailoa gulch (from gulch itself and very
far up, no. 41); Waialua (Perkins). D. S.

(5) Nesopetinus kauaiensis, Blackburn.
Brachypeplus discedefts var. kauaiensis Blackburn, Tr. Dublin Soc. in, 1885,

p. 137-

$ Depressus, testaceus, subtilius pubescens, prothorace fortiter transverso, elytris
angustiore, antrorsum fortiter angustato, minus dense et fortiter punctato, angulis poste-
rioribus fere rectis, elytris regulariter seriatim punctatis. Long. 3!^, lat. i\ mm.

Although I have seen only females I have no doubt this is quite distinct, and this
indeed was Mr Blackburn's opinion though he treated the insect merely as a variety,
under the idea that it might be a Kauai representative of N. discedens.

Hab. Kauai (Blackburn). D. S.

(6) Nesopetinus omissus, sp. no v.

Fusco-rufus, supra metallescens, antennis pedibusque rufis, illarum clava nigricante;
capite thoraceque dense punctatis ; elytris parum discrete seriatim punctatis. Long. j^\,
lat. vix 2 mm.

Mas., capite thoraceque densius punctatis haud nitidis.

Though very closely allied to N, metallescens, this is doubtless a distinct species.
Though the characters are slight they are sufficient to give N , omissus a different facies.
The male is readily distinguished from the corresponding sex of N, metallescens, by the
less broad and flat thorax, the sides of which are only narrowly explanate. In the
female the punctuation of the thorax is coarser and less dense than it is in the male, and
the explanation of the sides of the thorax is greater. This sex has the^ thorax more
rounded at the sides than the corresponding sex of N. metallescens, and consequently
the explanation of the sides is less at that spot : the punctuation is rather denser than
in the corresponding sex of N. metallescens. The eyes are rather smaller in omissus.
The pygidial characters are much the same in the two species. We have a series of
42 specimens.

Hab. Kauai. Halemanu, 4000 ft. ; mts. above Waimea (Perkins). D. S.

F. H. III. 64

496 FAUNA HAWAIIENSIS

(7) Nesopetinus, sp. ?

A single specimen from Kilauea, Hawaii, departs very decidedly from the long
series from Kona ; it is a female, and is much more densely punctured ; the thorax is
rather differently shaped, and the specimen less flattened ; the serial punctuation of the
elytra much less obliterated.

I doubt whether this can be an extreme variety of N. metallescens ; in some
respects it approaches N, omissus,

Hab. Hawaii. Kilauea, July 1895 (Perkins). D. S.

(8) Nesopetinus varius, Sharp.

Brachypeplus varius Sharp, Tr. ent. Soc. London, 1881, p. 512.

*' Sat latus, depressus, fusco-testaceus, supra subaenescens, subtiliter pubescens,
antennarum basi pedibusque testaceis, tarsis fuscis ; prothorace fortiter transverso, crebre
punctate ; elytris subimpressts, seriatim punctatis, interstitiis obsolete punctulatis.
Long. 4, lat. i^ mm.

This is an ally of N. metallescensy but the sexual distinctions of sculpture are only
slight and the elytra are always variegate ; it is decidedly less depressed. The irregu-
larity of surface of the elytra is only slight and is sometimes entirely absent.

The species is apparently rare as we have received only 14 examples.

Hab. Hawaii, Kona ; beaten from trunks and branches of various trees, 3000 ft.
(no. 243); from flowers of Freyciitetia, about 2000 ft. (no. 309); above Hilo, 1800 —
2000 ft.; Kilauea; (Perkins): Mauna Loa, 4000 ft. (Blackburn). D. S,

(9) Nesopetinus pusillus, sp. nov.

Fusco-testaceus, antennis pedibusque testaceis ; prothorace fortiter transverso,
lateribus anguste explanatis, angulis posterioribus fere rectis ; elytris obsolete seriatim
punctatis. Long. 4, lat. i\ mm.

Mas., capite thoraceque crebre subtiliter punctatis, hand nitidis.

Fem., thorace parce fortius punctato, nitido.

Closely allied to N, discedens, but rather smaller and more feebly formed, without
any trace of metallic lustre, the punctuation in the male more obsolete, and the hind
angles of the thorax less obtuse. The female has a smaller thorax than the female of
N. discedens, with the hind angles sharper, and the serial punctuation on the elytra
obsolete. The pygidium of the sexes is of almost the same formation as in N. discedens.

We have only a small series of five specimens, but there is I think no doubt as to
the species being distinct.

Hab. Maui, Haleakala, 2000 — 3000 ft., 1901 (no. 826, Perkins). D. S.

COLEOPTERA

497

(lo) Nesopetintis ve stilus, Sharp.

Brachypeplus vestitus Sharp, Tr. ent. Soc. London, 1881, p. 511.

Suboblongus, parum latus, depressus, fusco-niger, capite superne, pronoto elytrisque
vix aenescentibus, antennis pedibusque flavis, femoribus fuscescentibus ; densius palHde
pubescens, opacus. Long. 3|, lat. i^ mm.

One of the most distinct of the Hawaiian Nitidulidae ; recognisable by the regular
and considerable development of the pubescence covering the upper surface, which
converts the black colour into an uniform grey. It is apparendy very rare, Mr Perkins
having procured only two specimens.

Hab. Oahu. Konahuanui Ridge, xii. 1900 (no. 783); near Honolulu vi. 1900
(no. 789, Perkins); near Honolulu 1500 ft, on flowers (Blackburn). D. S.

Group 2.

(11) Nesopetmus (?) parallelus, Blackburn.

Brachypeplus parallelus Blackburn, Tr. Dublin Soc. iii. 1885, p. 135.

We have not received this species, which therefore is still known only by the
unique example discovered by Mr Blackburn and now in the British Museum. Mr
Blackburn states that it is closely allied to vestitus, and this therefore causes me to place
it in Nesopetmus, So far as I can judge from superficial examination it appears to be
a very distinct species, and it reminds me more of the very large, coarsely punctate
varieties of Nesopeplus rortdus — a species not known to Mr Blackburn. I therefore
entertain some doubt as to the real affinities of the species.

Hab. Lanai, 2000 ft., obtained by beating flowers (Blackburn). D. S.

(12) Nesopetinus eremitus, sp. nov.

$ Fusco-testaceus, supra aenescens, antennarum basi pedibusque testaceis; prothorace
baud fortiter transverso, fortiter punctato, lateribus anterius rotundatis, posterius subrectis,
basi recte truncato, angulis posterioribus fere rectis, leviter obtusis: elytris convexiusculis,
seriatim punctatis. Long, fere 4 mm., lat. i| mm.

We have only one specimen of this species, but it does not come very near to
any other. The prosternal process is very unusual in its shape, it is longer than in
N, metallescens, and appears to project a little more backwards than the pro-epimera ; it
is only moderately curved upwards ; apparently it is this slight curve that gives rise to
the appearance of the process projecting beyond the epimera. Antennae short, club
large. Thorax a good deal narrower than the elytra, the sides much rounded in front,
but nearly straight in front of the hind angles : the base reposes more than usual on the

64 — 2

498 FAUNA HAWAIIENSIS

base oi the elytra; the disc has an extremely slight depression behind the middle. The
elytra have a very vague red patch behind the scutellum : the series of punctures are
fine, but distinct, the interstitial punctuation very fine.

Hab, Oahu, Makuleiia, May 1901 (no. 752, Perkins). D. S.

(13) Nesopetinus celatus, Sharp.

Brachypephis celatus Sharp, Tr. Dublin Soc. iii. 1885, p. 134.

This species was described from a single male specimen. We have now a very
variable series of about 60 specimens. The majority are very dark, with brassy
reflection, with the legs, antennae and lateral margins of the prothorax near its hind
angles, testaceous. Some specimens are of a dark reddish-testaceous, and some darker
ones have the central parts of the elytra of this colour. The punctuation is somewhat
coarse on both upper and lower surfaces. The thorax is somewhat long in proportion
to its width, narrow, convex, narrowed in front, with the sides explanate only posteriorly
(not towards the anterior angles), and the hind angles rounded.

The male pygidium is emarginate, the angles forming short prominences : supple-
mentary segment very slightly rounded, almost truncate. Female pygidium short, with
lateral margins slightly sinuate, rather broad and rounded apically ; longitudinally
somewhat curved and depressed apically. The larger individuals are about 3-^ mm.
long, while a few are very small, one male being only 2^ mm. long.

The form of the thorax (apart from the generic difference in the prosternum)
distinguishes this species from Nesopeplus inauratus. The thorax is longer pro-
portionally, narrower, less rounded laterally, with larger and less close punctures, more
rounded hind angles, and the sides only explanate posteriorly.

Hab. Hawaii, Maui. — Hawaii: Kona, 3000 — 5000 ft. (*'from flowers and dead
wood," '' on decayed Koa " ; many with no particulars) ; Hualalai. — Maui ; 1 1 speci-
mens, all from West Maui, Jao Valley, no. 349. (Perkins.)

(14) Nesopetinus apertus, Sharp.

Brachypeplus apertus Sharp, Tr. Dublin Soc. iii. 1885, p. 135.

This was described as a distinct species from a single female found by Mr Blackburn.
Mr Perkins has only found one specimen, also a female, and though we can find no
very important character distinguishing apertus from celatuSy yet they are probably
distinct.

Both specimens are rather long and narrow, with somewhat long elytra. The
prothorax is very convex, and in the second specimen conspicuously narrowed in front.
The punctures are large, and on the prothorax rather distant. The surface is remark-
ably shining ; the pubescence is very scanty, especially on the prothorax and elytra,

COLEOPTERA 499

though how far this is due to its being rubbed ofif cannot be told from these two
specimens. The two last characters give apertus a very distinct appearance from
celatuSy in which the pubescence is conspicuous.

Hab. Hawaii. The original specimen was found at Mauna Loa, 6000 feet
(Blackburn) ; the second one at Kona, 4000 feet (no. 327, Perkins). A third specimen
in the British Museum named apertus by Mr Blackburn agrees with our two indi-
viduals. H. S.

(15) Nesopetinus scottianus, sp. nov.

Nigricans, pedibus, antennis, prothoracis lateribus, elytrorumque epipleuris rufo-
testaceis ; elytris abdomineque interdum plus minusve rufescentibus vel flavescentibus ;
prothorace fortiter transverso, parum convexo, basi apiceque fere recte truncatis,
parallelis, lateribus leniter rotundatis, posterius haud late explanatis ; elytris seriebus
punctorum discretis. Long. 4 mm., lat. vix \\ mm.

The amount of yellow colour on the elytra and abdomen varies greatly and some-
times there is none, but the side margins of the thorax are always narrowly yellow
above, and on the under-side broadly yellow ; the upper surface has frequently a
brassy tint.

The species is in some of its varieties very close to Nesopeplus inattratus and
Nesopetinus celatus ; it may however be usually easily distinguished by the shape and
colour of the thorax from both of those species.

The sexes are a good deal different, and have a different range of variation. The
male is usually larger than the female and has the thorax broader, and more densely
punctured especially in front, and the head is slightly larger. The male has a well
marked notch at the apex of the pygidium, the angles forming short teeth : the female
has a short broad pygidium, nearly straight behind. In the female the yellow colour is
usually more extensive than it is in the male, and it is only in the female sex that
specimens with entirely yellow abdomen occur.

From Nesopeplus inauratus the species can be distinguished, without examination
of the prosternum, by the thorax being more evenly and gently rounded at the sides,
with the margins comparatively less widely explanate behind. Large and well developed
individuals of the species are easy to recognise, but depauperated specimens in which
the sexual characters are diminished are very difficult to determine.

The nearest ally of N, scottiamis is N. celatus ; that species has a thorax longer in
proportion to the width, more narrowed in front, the explanation of the sides rather less,
and the yellow colour of the sides confined to the basal part.

I have named this species in honour of my colleague, Mr Hugh Scott, who has
devoted a great deal of attention to these very difficult insects.

We have a large series of about 1 20 specimens of this species.

500 FAUNA HAWAIIENSIS

Hab. Hawaii. The great majority from Kilauea; also Kona (some recorded
from 4000 — 5(X)0 ft, some from *' flowers and dead wood ") ; Hualalai, about 5000 ft. ;
above Hilo 1800 ft.: (Perkins), D. S.

(16) Nesopetinus sp. ?

A single male specimen from Maui appears not to fall within any of our species.
The pygidium is similar to that of N, scottianus $, The thorax is broad, not strongly
convex, narrowed in front and posteriorly, with hind angles much more definite than in
N. scottianus, so that the sides show an approach to sinuation in front of them : there
are two vague impressions on the posterior part of the disc. Length about 4 mm.

Hab. Maui, Olinda, between 3000 and 4000 ft. v. 1896 (no. 629, Perkins). H. S.

(17) Nesopetinus pallidus, sp. nov,

Subparallelus, transversim convexus, testaceus, capite thoraceque dense punctatis,
hoc lateribus leniter curvatis angulis posterioribus rotundatis ; elytris seriatim fortiter
punctatis. Long. 3, lat. i;^ mm.

This species on account of its colour, size, and form has a general resemblance to
Nesopeplus vagepictus, but the male characters are different, and the prosternal process
projects well behind the coxae. The thorax is rather short, about as wide as the elytra,
not much narrowed in front, but with the hind angles rounded and very indistinct ;
there is scarcely any explanation of the sides ; the punctuation is very dense, especially
in front, where also it is finer. The seriate punctures of the elytra are rather large.
The legs are short and stout.

The male has a deep, rather narrow notch at the apex of the pygidium, and the
angles are sharp.

We have seven specimens.

Hab. Oahu. Waianae mts., 3000 ft. (nos. 10, 547); mts. 2500 ft. (no. 30^);
Mokuleiia, no. 752 : (Perkins). D. S.

(18) Nesopetinus concolor, sp. nov.

F'errugineus, subtiliter pubescens haud nitidus ; capite angusto, oculis convexis ;
thorace elytris multo angustiore, dense punctato ; elytris subtiliter seriatim punctatis.
Long. 3, lat. \\ mm.

One of the most distinct species, and superficially not like anything else. The
punctuation of the thorax is dense and fine. The elytra are convex, only very faintly
punctured, the interstices a little convex. The male has the hind margin of the
pygidium distinctly emarginate but the angles are very blunt : supplementary segment
very broad, not tapering, slightly sinuate in the middle of the apical margin. Legs

COLEOPTERA 501

not stout, approaching somewhat to the slender condition found in N. filipes. The
lobes of the third tarsal joint are however not reduced as they are in N . filipes (see
PL XVI. fig. 7, for comparison with N. filipes). Female pygidium short, apically
broad and subtruncate with rounded angles. Eight specimens.

This very distinct species has a prosternal process projecting distincdy behind the
coxae, and not at all curved upwards at its termination.

Hab. Maui, Haleakala, 5000 ft., v. 1896 (nos. 608, 614, Perkins). D. S.

(19) Nesopetinus filipes, sp. nov.

Subdepressus, parcius, pubescens, sat nitidus, palHde testaceus, abdomine nigro-
fusco, apice testaceo, prosterno mesoternoque fuscescentibus ; elytris subseriatim minus
subtiliter punctatis. Long, 3^, lat. \\ mm.

A very peculiar species. Head small, antennae short, pale yellow. Thorax trans-
verse, the sides narrowed behind, with a narrow definite explanation, the hind angles
obtuse, the punctuation coarse. Elytra broader than the thorax and with punctuation
almost similar. Legs slender ; femora projecting distinctly beyond the sides of the
body; lobes of tarsal joints, especially those of the third joint, small (see PL XVI.
fig. 6, for comparison with foot of N. concolor), Male pygidium shallowly emargi-
nate or only sinuate apically, the angles rounded and blunt : supplementary segment very
characteristic, narrow, very tapering, rounded and without any depression or emargi-
nation apically. Female pygidium rather broad at the base, tapering, narrow and
rounded apically.

Though very distinct as a species, this is one of the most difficult to classify. The
prosternal process is short, and is convex between the coxae, but behind them it is but
little directed upwards, and the species is therefore better placed in Nesopetinus than
in Nesopeplus,

We have 15 specimens, mostly males.

Hab. Oahu, viii. 1900 (no. 785); Konahuanui Ridge, xir. 1900, no. 783;
(Perkins). D. S.

(20) Nesopetinus quadraticollis, Blackburn.

Brachypeplus quadraticollis Blackburn, Tr. Dublin Soc. iii. 1885, P- ^35-
Nigricans, supra inauratus, rufo-variegatus, antennis pedibusque rufis ; prothorace
parum trans verso, dense punctato, lateribus subrectis anterius angustatis, basi fere recte
truncata angulis posterioribus rectis. Long. 4, lat. i^ mm.

This appears to be a very distinct species, approximating by the form of the
thorax somewhat to the Nesopetinus blackburni allies ; the pronotum too is applied to
the elytra in a somewhat similar manner. The structure of the prosternum agrees with
Nesopetinus scottianus. The species appears to be very rare ; we have six specimens.

502 FAUNA HAWAIIENSIS

The male has an extremely slight notch at the extremity of the last dorsal plate, but
the angles do not project at all

Hab. Hawaii. Mauna Loa, 4000 ft. (Blackburn) : Kona, 4000 ft. (nos, 247, 307),
Kilauea, nos. 568, 656 ; (Perkins). D. S.

(21) Nesopetinus rudzs, sp. no v.

Niger, supra aenescens, antennarum basi pedibusque rufis ; thorace minus fortiter
transverso, dense punctato, posterius sat distincte biimpresso, angulis posterioribus
obtusis ; elytris subtiliter seriatim punctatis, interstitiis parce punctatis. Long, fere 4^,
lat. i^ mm.

Allied to A^. quadraticollis, but quite differently coloured, and the hind angles of
the thorax slightly obtuse. The prosternum is thick behind the coxae, so that the
process appears to project a good deal. The male characters are but slight, there being
a scarcely perceptible emargination of the hind margin and no projection of the angles,
which are very broadly rounded. Only one specimen has been found.

Hab. Hawaii, Kona, nearly 5000 ft., 30. vi. 1892 (no. 320, Perkins). D. S.

Group 3 A.

(22) Nesopetimis perkinsi, sp. nov.

Sat latus, nigricans, prothoracis abdominisque marginibus pedibusque fusco-
testaceis, sub-aeneo-micans, parum nitidus, alutaceus, sat rare ac subtile punctatus,
subtile pubescens ; prothorace vix transverso, antrorsum angustato, lateribus posterius
fortiter sinuatis, angulis posterioribus fortiter argutis, disco transverse impresso ; elytris
obsolete sulcatis ac impressis, subtile seriatim punctatis. Long. corp. 3 — 3f mm. ;
lat. corp. i^ — i-|-mm.

This is a very well-defined species. The entire surface is alutaceous, or covered
with a fine reticulate striation, and the punctures are fine and small, and not dense.
The prothorax is truncate both anteriorly and posteriorly ; the angles are definite,
especially the posterior, which are very sharp ; the sinuation of the sides is well-marked.
In the posterior part of the disc is a marked transverse depression, deeper at its two
ends, so that it sometimes looks like two depressions side by side. The punctuation
is frequently distinctly closer on the anterior part of the thorax than on the posterior ;
this is especially noticeable in the males, less so in the females, in which the thoracic
punctures are frequently altogether further apart. The furrows on the elytra are not
sharply defined, but are somewhat vague longitudinal depressions ; there are also wider
vague depressions. The specimens vary considerably in both length and breadth.

COLEOPTERA 503

Male pygidium rather broad, very slightly emarginate, the angle on either side
of the emargination being obtuse and rounded, not prolonged into a tooth ; the last
ventral segment has the emargination so broad and shallow that it is almost truncate ;
supplementary segment with margin entire, somewhat rounded ; end of female pygidium
rounded and with a more or less marked median depression. Seventy-one specimens.

A single female, which cannot be separated from the rest, is numbered as coming
from Halemanu, Kauai.

Hab. Maui, Haleakala (Olinda, &c.), 4000—5000 ft. ; almost all from 5000 ft.
or above ; some recorded as ** beaten from flowers of tree Lobelia' (Perkins).
Kauai .? (no. 507). H. S.

(23) Nesopetinus intermedius, sp. no v.

N. perkinsi affinis, sed minor, nigrior, laevior, haud aeneo-micans, elytris haud
sulcatis, pubescentia curtiore, prothorace abdomineque rarius ac subtilius punctatis.
Niger, prothoracis lateribus abdominisque marginibus pedibusque fusco-testaceis.
Long. Corp. 3 mm.; lat. corp. r^ mm.

There is only a single male specimen of this form. It is very much smaller than
most specimens of A^. perkinsi, and is further distinguished by the rarer punctuation,
scantier pubescence, black colour, and absence of the vague elytral furrows and of the
dull brassy reflection characteristic of the former species. It is also proportionately
narrower, and the surface is very much smoother than that of N, perkinsi There is an
obsolete depression on the hind part of the prothorax. Thus in almost all the characters
which distinguish it from the former species, it shows a distinct approximation to
N, b/ackburni.

Pygidium with a very slight emargination, the angles not forming teeth; supple-
mentary segment not emarginate; last ventral segment truncate.

Hab. Lanai, about 2000 ft. (no. 92, Perkins). H. S.

Group 3 B.

(24) Nesopetinus blackburni^ Sharp.

Brachypephis blackburni Sharp, Tr. ent. Soc. London, 1881, p. 516.

This species was described from a single male found on Mauna Loa. We now
have 23 specimens. It is at once distinguished by the glabrous, smooth, black
and highly shining appearance, and the scantiness of the punctuation. The surface is
very finely alutaceous, but the reticulations are so minute that they do not prevent the
insect from appearing highly polished. The species is rather narrow, with somewhat
elongate antennae. The thorax is subquadrate, with the sides slightly sinuate towards
the base, with a somewhat vague transverse impression on the posterior part of the

F. H. III. 65

504 FAUNA HAWAIIENSIS

disc; the punctuation is scanty. The punctures in the male are often rather closer
near the anterior margin of the thorax, as in N. perkinsi, to which this species is in
some respects allied. The seriate punctuation on the elytra is scanty and very fine. A
few specimens are much lighter in colour, exhibiting lighter areas on the elytra, and
being in general of a brown rather than a black colour.. The length varies from

2| to z\ mn^-

The male pygidium is truncate with widely rounded angles, and with or without a
very slight median emargination; last ventral segment truncate; supplementary segment
usually slightly emarginate. Female pygidium not strongly tapering, rounded at the
apex.

Hab. Hawaii — the original type from Mauna Loa, over 4000 ft. (Blackburn) : the
others from Kilauea ; above Hilo, 1800 ft. ; Haumana, Hilo, 2000 ft. ; Olaa, nos. 558,
568, 697, &c. ; (Perkins).

For the Lanai and Maui forms, see below.

Nesopetimcs blackburni (?) van lanaiensis, Blackburn.

Brachypeplus (?)var. lanaiensis Blackburn, Tr. Dublin Soc. iii. 1885, pp. 138 and
229.

I have examined three specimens in the British Museum, obtained from Lanai by
Blackburn, and called *' (?) var. lanaiensis'' by him. They are all very small, but there
is variation in size among the Hawaii specimens, and it is uncertain whether those from
Lanai can be separated as a definite variety.

Nesopetinus blackburniy var. mauiensis, var. nov.
Mr Perkins obtained one male specimen from Maui. It is very small, narrow,
with conspicuously quadrangular thorax, and with the punctures on the elytra smaller
than in the Hawaii specimens, and their seriate arrangement less evident.

Hab, Maui, Haleakala, 5000 ft. (no. 358, Perkins). H. S.

Group 4.

(25) Nesopetinus blackburnianus, sp. nov.

Fusco-testaceus, nitidus, aegre aeneo-micans, subtile pubescens, prothorace trans-
verso, lateribus explanatis ac rotundatis, angulis posterioribus obtusis sed argutis, disco
crebre vix dense punctato ; elytris obscure seriatim punctatis ; abdomine baud dense
punctato. Long. corp. 4f mm. ; lat. corp. if mm.

This species is clearly distinguished by the character of the terminal segments.
The male pygidium has a conspicuous notch, with a well-marked tooth on either side ;
the supplementary segment is broad and emarginate ; the last ventral segment is very
remarkable, being deeply and broadly emarginate, with the margin slightly sinuate in

COLEOPTERA 505

the middle line (PI, XVI. fig. 2). The female pygidium is extraordinarily long, narrow
and tapering, rounded at the apex ; the last ventral segment has its apex much rounded
and arched, and conspicuously fringed with hairs (PL XVI. fig. i).
We have three specimens, one male and two females.

Hab. Maui; the two females from West Maui, 4000 ft. (nos. 368, 379); the male
from Haleakala, 5000 ft. no. 369 ; (Perkins). H. S.

Notopeplus, gen. nov.

Corpus elongatum, parallelum, transversim modice convexum. Prothorax margine
laterali dense ciliata. Prosternum processu piano, post coxas magno.

This genus is near to the Australian Brachypeplus) but the insect is of a different
shape, and is readily distinguished by the large robust prosternal process, which is not in
the least arched as it passes over the front coxae. Its nearest ally in the Hawaiian
fauna is found in Orthostolus robustus, in which the ciliae on the margin of the pronotum
are obsolete. In this respect Notopeplus is intermediate between Brachypeplus and
Orthostolus, but in other respects this is not the case and I cannot therefore consider
Notopeplus as exhibiting a certain connection between the Hawaiian and Australian
faunas. In fact it is an exceptional form in the former district. D. S.

(i) Notopepltis reitteriy Sharp.

Brachypeplus reztterz Sharp, Tr. ent. Soc. London, 1878, p. 134.

Plate XIV. fig. 2, $.

The sculpture of the elytra is peculiar among the Hawaiian Nitidulidae: it consists
of shallow grooves separated by interstices that are not broader than the grooves; both
grooves and interstices are punctate, the former being dull, the latter a little shining.
We have 19 specimens.

Hab. Oahu, Hawaii. — Oahu; Kawailoa gulch iv. 1893. — Hawaii; Kilauea, Hilo,
Olaa on several occasions. (Perkins.) D. S.

Cillaeopeplus, gen. nov.

Corpus elongatum, parallelum, valde depressum. Prosternum processu post coxas
lato, baud recurvato. Tarsi vix dilatati.

This genus is readily distinguished amongst the Hawaiian Nitidulidae by the
extremely depressed form, and by the structure of the tarsi, the third joint of which may
be said to be without lobes. D. S.

65—2

5o6 FAUNA HAWAIIENSIS

(i) Cillaeopepltiis injimus, Sharp.

Brachypephis mfimtis Sharp, Tr. ent. Soc. London, 1878, p. 135.

" Omnium perdepressus, elongatus parallelus subopacus, sine pubescentia, fuscus
vel fusco-testaceus, pedibus dilutioribus ; oculis vix ad capitis angulos posteriores rectos
attingentibus, baud magnis ; prothorace transversim oblongo, crebre subobsolete
punctato; elytris profundius striatis, interstitiis seriatim sed vix perspicue punctatis ;
abdomine subtilissime punctulato. Long. 3^ — 4^ mm. ; lat. i mm."

Plate XIV. fig. 5, $.

We have six specimens of this species found by Mr Perkins on Oahu, and he also
found a good series of 30 specimens on Lanai, and I am not able to distinguish these
specimens from those sent me by Mr Blackburn as coming from Oahu.

Hab. Oahu, Lanai. — Oahu; '* under the bark of trees on the mountains"
(Blackburn); Konahuanui Ridge, and mountains near Honolulu (Perkins). — Lanai;
2000 ft. and over, xii. 1893 and i. 1894 (Perkins). D. S.

(2) Cillaeopeplus perkinsi, sp. no v.

Elongatus, parallelus, depressus, baud nitidus ; prothorace subtiliter rugoso-punctato ;
elytris profunde punctato-striatis ; femoribus posterioribus margine postico medio angulo
acute prominulo. Long. 4 — 5, lat. i^ mm.

We have only a short series of eight examples of this species, but there is no doubt
of its distinctness : indeed the angular prominence on the hind femora distinguishes
C, perkinsi from all the other Hawaiian Nitidulidae. The striation of the elytra is very
deep and regular. Our series includes both sexes; there is but little difference between
them, except that the male has a small convex supplementary segment as in C. injimus,

Hab. Kauai; all from Makaweli, 2500 ft. 11. 1897 (no. 703, Perkins). D. S.

(3) Cillaeopeplus dubius, sp. nov.

C infimi perafifinis ; paulo robustior, minus subtiliter sculpturato, elytris striis
latioribus et profundioribus. Long. 3!^ mm.

A single specimen, of the male sex, found on Hawaii does not quite accord with
C infimtis, and I think will prove to be another species rather than a variety. It is
shining, the thorax is a little narrower in comparison with the length, it is distinctly
punctate at the sides, and the peculiar dull patch on the middle contrasts strongly with
the sides. The striae on the elytra are so broad and deep that they are grooves, almost
broader than the interstices.

Hab. Hawaii, Kilauea, vii. 1895 (no. 691, Perkins). D. S.

COLEOPTERA 507

Carpophilus Stephens.

Carpophilus Stephens, 111. Brit. in. 1830, p. 50.

The species of this genus are found in foodstuffs and are carried all over the world:
some of them are very variable in size and colour, the varieties being found together
indiscriminately.

(i) Carpophilus hemiptei^us, Linnaeus.

Dermestes hemipterus Linnaeus, Syst Nat, i, 2, p. 565.
Cosmopolitan. Occurs in foodstuffs.

Hab. Oahu, Maui (Blackburn).

(2) Carpophilus dimidiatus, Fabricius.
Nitidula dimidiata Fabricius, Ent. Syst i. p. 261.

Hab. Oahu, Maui, Hawaii, and probably all the islands (Blackburn, Perkins). It
is a cosmopolitan species and occurs in abundance in foodstuffs.

(3) Carpophilus maculatus, Murray.
Carpophilus maculatus Murray, Mon. Nitidulidae, p. 372.

Hab. Oahu, Maui, Hawaii and probably all the islands (Blackburn, Perkins).
Found together with C dimidiatus.

(4) Carpophilus humeralis, Fabr.

Nitidula humeralis Fabricius, Syst. El. i. p. 354.

This species is apparently less abundant than the preceding in collections. It
has been found in India, Africa, and Mauritius. Mr Perkins' collection contains 13
specimens.

Hab. Oahu. Waianae mts., 3000 ft., beaten from various trees, iv. 1892 ; Kaala
mts., under and in decaying oranges, 1500 ft. iii. 1892 ; Honolulu : (Perkins).

Haptoncus Murray.

Haptoncus Murray, Mon. Nitidulidae, 1864, p. 401.

Two species of this genus are found in the Hawaiian islands. One of them —
H, tetragonus — is common in the East Indies and has doubtless been imported to
Hawaii. Although the second has not yet been noticed elsewhere, it also is probably
an importation. They are the smallest of our Nitidulidae and have no relation with the
members of the precinctive fauna.

5o8 FAUNA HAWAIIENSIS

(i) Haptoncus tetragonus, Murray.

Haptoncus tetragonus Murray, Mon. Nitid. p. 401, pi. xxxiii, f. 7.
When quite immature the black spots may be absent, but the sculpture and shape
prevent these examples from being mistaken for the unspotted H, mundus,

Hab. Oahu, Lanai, Hawaii, Kauai. — Oahu ; Kaala mountains. — Lanai ; mts.
Koele. — Hawaii ; Kona. (Perkins.) — Kauai (Blackburn).

(2) Haptoncus mundus, Sharp,
Haptoncus mundtts Sharp, Tr. ent. Soc. London, 1878, p. 139.

Hab. Oahu, Hawaii, Kauai. — Oahu (Blackburn); Waialua (Perkins). — Hawaii
(Blackburn); above Hilo, 1800 ft. (Perkins), — Kauai (Perkins); a small dark variety
recorded by Blackburn from this island (Tr. Dublin Soc. iir. 1885, p. 231). Blackburn
records it as taken **on flowers of forest trees on the mountains" and generally 1500 —
3000 ft above the sea. Mr Perkins' collection contains eight specimens.

Fam. HISTERIDAE^

This family is represented in the Hawaiian Islands by four genera. The species
of two of these, Carcinops and Saprinus, are undoubtedly introduced. With regard to
the third genus, Bacanius, it is not possible to say whether the species belonging to it
are also introduced, or whether they belong to the truly native fauna. The species of
the fourth genus, AcrituSy with one possible exception almost certainly form part of
the indigenous fauna. Except in the case of the one point mentioned below, questions
relating to them are discussed under the heading of that genus.

Reduction of Wings. Out of the 33 species of Acritus belonging to the division
of the genus in which there is no visible scutellum, two species i^A, longipes and its van
haleakalae, and A. subalatus) have been shown to have the wings greatly reduced.
Smallness of material has prevented a thorough investigation of this phenomenon, and
although the reduction has been proved in five specimens altogether, in only one
specimen has it been possible to obtain the reduced wing in a perfect condition. Of
the other 31 species, 14 have been shown to have the wings not reduced; but here
again smallness of material and the fact that it is almost impossible to study the wings
without entirely removing one or both elytra have been a hindrance, and in only one
case {A. subbasalisy q. v.) has an examination of more than one specimen been possible.
In the remaining 17 species of this section of Acritus, in the one species belonging to
the other section, and in the other genera, the wings have not been seen.

In the descriptions of the Bacanii and Acriti, it is in each case mentioned whether

^ By Hugh Scott.

COLEOPTERA 509

the wings have been examined or not. The sentence *' wings not reduced" indicates,
in the case of each species, that one specimen has been examined, except in the case of
A, subbasalis, where (as is stated) five were found to have full-sized wings.

Passing to a consideration of the wing-reduction more in detail. In the original
type specimen of A, longipes the wings have been found to be greatly reduced, but their
exact nature could not be determined ; the same was found to be the case in one of the
two specimens of A, longipes var. haleakalae. Two specimens of A, subalatus from
Molokai are in the same case. The type of A. subalatus (from Lanai) is the only one
in which the reduced wing has been seen undamaged. The five specimens examined
for this character are thus all accounted for.

The wing of the type specimen of A, subalatus is shown in PL XV. fig. 26 : the
line a at the side represents the length of the elytron to the same scale. It is thus seen
that the wing is only about f the length of the elytron. Fig. 6, drawn on a very much
smaller scale, shows the proportionate lengths of wing to elytron in one of the species
with full-sized wings. A. kauaiensis ; the wing is a litde over twice the length of the
elytron. The wing of A, subalatus is of course not folded ; the curious shape of it in
the anal area, as shown in the figure, is almost certainly due to a doubling under of the
anal part ; the real shape of the wing in this region being roughly indicated by the
dotted line. When the elytra are closed, the specimens have nothing in their appearance
which would lead one to suppose that their wings are reduced ; the elytra are just as
convex as those of species with full-sized wings. Also, the space under the elytra, in
which the species with full-sized wings fold and pack those organs, seems to be pro-
portionately just as large in the reduced-winged species. The elytra of specimens with
reduced wings are in no case soldered together.

It appears that reduction of wings in the Histeridae is a subject which has not
previously been investigated. Since, therefore, the condition of these organs in Histeridae
from other parts of the world is not known, no importance can be attached to the fact
that these species with reduced wings are insular species.

Note. Descriptive terms. In all the Hawaiian species of Bacanius and Acritus,
the prosternum has two more or less raised ridges on either side. I have followed the
usual custom in terming these '' striae." The part of the prosternum between the inner
pair (PI. XV. fig. 23, a) is termed the '' keel." In Latin diagnoses the term '^prosternum"
refers almost exclusively to this keel-area. When prosternal striae are mentioned, only
the inner pair (fig. 23, a) are meant; the outer pair (fig. 23, b\ on the sloping sides of
the prosternum, are not made use of for systematic purposes. The marginal line of the
mesosternum, and the diverging lines on the metasternum continuous therewith, and
also the diverging lines on the first abdominal segment, are also called ** striae": they
have almost always the nature of sunk grooves.

Measurements. The length measurements in no case include the length of
the head.

510 FAUNA HAWAIIENSIS

The Acriti and some other small forms have been studied very largely under a
Ross compound microscope with a f inch objective and a no. 2 eyepiece. Without
some such power the characters cannot properly be made out.

Carcinops Marseul.
Carcinops Marseul, Ann. Soc. ent. France, 1855, p. 83.

(i) Carcinops quatuordectmstriata, Stephens.

Dendrophilus quatuordecimstriatus Stephens, 111. Brit. v. 1832, p. 412 ; Sharp, Tr.
Dublin Soc. iii. 1885, p. 225.

Hab. Cosmopolitan. Introduced into Hawaiian Archipelago ; Oahu (Blackburn,
Perkins).

Saprinus Erichson.
Saprinus Erichson, Jahrb. 1834, p. 172.

(i) Saprinus higens Erichson.

Saprinus lugens Erichson, Jahrb. 1834, p. 181 ; Marseul, Ann. Soc. ent. France,
1855, p. 395 and pi. 16, fig. 34; Sharp, Tr. DubHn Soc. iii. 1885, p. 225.

Hab. Mexico, California, Vancouver. Introduced into Hawaiian Archipelago:
in decaying carcases all over the islands (Blackburn, Perkins).

(2) Saprinus oregonensis Leconte.
Saprinus oregonensis Leconte, Mon. p. 45 and pi, 5, fig. 12; Sharp, loc. cit.

Hab. North America. Introduced into Hawaiian Is. (Blackburn, Perkins).
** Generally found in company with S, lugens'' (Tr. Dublin Soc, loc. cit.).

Bacanius Leconte.

Bacanius Leconte, P. Ac. Philad. vi. 1853, p. 291.

In this genus the scutellum is invisible, and the hind tarsi have five joints.

(i) Bacanius atomarius Sharp.

Bacanius atomarius Sharp, Tr, Dublin Soc. iii. 1885, p. 128.
Plate XV. fig. -i^"], pro- and mesosterna, &c.

This species is known only from specimens found by Mr Blackburn, of which I
have examined the type and one other. Distinguished at once from any known Hawaiian

COLEOPTERA 511

Acritus by the broadness of the front and middle tibiae, the former (PI. XV. fig. 35)
especially being very broad. The original diagnosis is as follows : —

'*Breviter ovalis, convexus, ferrugineus, sat crebre et fortiter punctatus; mesosterno
breve, punctato. Long, i mm.''

Head microscopically rugulose with fairly numerous punctures, fronto-clypeal suture
not distinct, Prothorax with numerous moderately strong punctures, with a slightly
arcuate median transverse chain of punctures before the base, the area between this and
the base also punctured ; the base forms a rather prominent median angle. Punctures
on the elytra strong and not very close on the disc, smaller and dense apically.
Characteristic of both thorax and elytra is the presence of punctures of more than
one size, very minute ones lying in the interspaces between the larger ones. Pygidium
much deflexed, narrow, closely punctured. Presternum strongly punctured, about i|
times as long as the breadth at the base of the keel ; the striae on either side of the
latter are only present in the basal portion ; anteriorly the keel is not marked off
from the side parts of the presternum, and only the outer striae are present. Meso-
metasternal suture impunctate, almost straight ; immediately before it, on the mesosternum,
a slightly arcuate chain of coarse punctures. Metasternum coarsely punctate at the sides,
punctures obsolete in the middle. First abdominal segment coarsely punctured. Di-
verging striae curved up behind the coxae. Wings not examined.
Hab. Oahu, near Honolulu (Blackburn).

(2) Bacanius conftisus, Blackburn.

Bacanius confusus Blackburn, Tr. Dublin Soc. iii. 1885, p. 129.

Known only from a single specimen obtained by Mr Blackburn, which I have
examined. Smaller than B, atomarius, and less strongly punctured. On the median
part of the elytra there are fine striae or wrinkles curving in towards the suture ; on the
apical part the punctures are stronger. There is no definite series of punctures, or any
special sculpture, at the base of the thorax. Wings not examined.

Hab. Oahu (Blackburn).

Acritus Leconte.
Acritus Leconte, P. Ac. Philad. vi. 1853, p. 288; Horn, P. Amer. Phil. Soc.

xiii. 1873, p. 352.

Aeletes Horn, T. c. p. 356.

Acritus Lewis, Biol. Centrali-Americana, Coleoptera (11.), p. 238, 1888.

This genus is characterised by the presence of only four joints in the hind tarsi,
the long basal joint appearing as if formed by the fusion of two joints. Horn (I.e.)
distinguished between those Acriti with a visible scutellum, and those with no visible

F. H. I IK <56

512 FAUNA HAVVAIIENSIS

scutellum, forming the genus Aeletes for the latter. Aeletes was again merged in
Acrittts by Lewis (Lc), on the ground that the distinction between them is insufficient.
This arrangement is retained here.

The known Hawaiian members of the genus are obviously divisible into two very
unequal groups ; one consisting of but a single species, A. instUariSy with a distinct
scutellum, the other consisting of n species in which absolutely no scutellum is visible,
in any light or position, even under high powers of the compound microscope. A. insit-
laris is moreover sharply marked off from its congeners by several other characters ;
chiefly by the very definite basal chain of punctures on the thorax, arcuate in the
middle, and by the definite row of coarse punctures along the meso-metasternal suture ;
these two characters are not found in any other known Hawaiian Acriti, though they
are present in various Acriti from other lands. Indeed the meso-metasternal row of
punctures is, according to the descriptions of de Marseul and others, present in several
Acriti (some of which are N. American) which in other respects seem to be very
closely allied to the Hawaiian Acriti without visible scutellum. Altogether A. insti-
laris is so very unrelated to its Hawaiian congeners, that one almost suspects it of
being a recently introduced form : this however is only a matter of conjecture.

Leaving A, instdaris out of account, and considering only the forms without
visible scutellum, there is every reason to believe that they are part of the truly indige-
nous fauna of the islands. They are almost all from mountain localities at elevations of
from 2000 to 6000 feet ; many are recorded from elevations of 3000, 4000 and 5000
feet. They are from the indigenous forests, where they are found, as I am informed
by Mr Perkins, always in dead wood of some kind, either just under the bark, or deeper
in the rotten wood.

These Hawaiian Acriti (and indeed the Acriti of all the world) are at present too
imperfectly known for any statement to be made with certainty, as to whether or not
they are precinctive, that is, confined to the Hawaiian Islands. Examination of a
number oi Acriti in the British Museum, from Europe, various parts of Asia, Australia
and New Zealand, has not revealed any closely related to those in question. The
descriptions of many other species show plainly that they too are quite different from
the Hawaiian forms. Descriptions of yet other species do not allow of a decision being
formed as to whether those species are like the Hawaiian Acriti or not. It is to be
regretted that in many cases no statement is made as to whether a scutellum is visible
or not. If any known species do come very close to their Hawaiian congeners, it
appears that such are North American forms. Certain specimens found by Blackburn
near Honolulu were considered to belong to the Californian A. basalis Leconte. Some
of these have had to be removed to other species ; as to the remainder, I have not seen
A, basalis Leconte, and cannot be certain whether they are of that species.

The material is not large enough to allow of much being said about the distribution
within the Archipelago. The majority of species are so far known each only from one

COLEOPTERA 513

island; this majority includes 10 of the most distinct forms: and of eight of these we
have series of over six specimens. The 18 specimens of the large and distinct
A. kauaiensis, 2SiA the 17 specimens of the well-marked A. ptmctahts, are all from
Kauai. On the other hand, some species, such as A, minor, appear to be undoubtedly
found in more than one island. In some cases, all the specimens of a fair-sized series
are from a single locality, or a very few localities. These obscure forms have not at
present been at all exhaustively collected.

As stated above, the species do not appear very closely allied to those of other
parts of the world ; while the various groups of them have each, with scarcely an excep-
tion, close inter-relations among themselves. In one or two cases, certain forms seem
to be represented by two or more closely allied species in different islands : thus
A, pwtctaitis (known only from Kauai) is close to A. kuhnae (Oahu), and A. scidphis
(Molokai) is represented in Kauai by A. makaweliae. In respect of a single character
(the nature of the diverging ventral striae), A, sttbrottindus stands away from all other
species without visible scutellum ; agreeing in that one respect with A, insidaris. On
the whole it appears probable that most, at any rate, are precinctive. Should this
prove to be so, and should some species prove to be confined to single islands, these
phenomena will only be in accordance with what is known of the general nature of the
Hawaiian fauna.

No general statements as to the variability can be made from a study of the
present material. The specimens of the larger series show very little variation, except
in some cases clear differences Avhich are very probably sexual (see under A. makaiveliae,
and footnote p. 522). It is possible that a few new species described from single
individuals will prove to be only varieties of other species, but the great majority are
quite distinct from one another.

Certain structural* features of these Hawaiian species must be noticed. De Marseul
in giving the characters of the genus writes' : " Front sans strie ni depression trans-
versale qui le distingue de lepistome." In a few of the Hawaiian species, however, a
distinct transverse suture just in front of the antennae is present : in most there is no
trace of it : when present, it is mentioned in each case. Lower surface of the head
behind the labium with only a single median suture. The prothorax has always a very
fine marginal stria along the lateral and front borders ; as this is hard to see, and offers
no distinguishing characters, no other mention is made of it. The stria along the
deflexed ventral marginal part of every elytron also appears to offer no characters. One
or two oblique striae may be present near the shoulder of the elytron ; they may be
distinct furrows, vague, almost imperceptible, often quite absent ; very variable in the
specimens of a single species, and of no use in distinguishing species. Whether they
are present or not, the sculpture in the part of the elytron near the shoulder is nearly
always different to that on the rest of the disc (PL XV. fig. 7). The area at the

* Ann. Soc. ent. France (3) iv. 1856, p. 596.

66—2

514 FAUNA HAWAIIENSIS

middle of the base of the pronotum is very often differently sculptured to the rest ;
slightly impressed and bounded in front by a transverse slightly arcuate line. But no
species except A. insularis has the basal chain of strong, very clear-cut punctures. The
characters chiefly used in distinguishing species are, form and proportions of prosternum,
form of mesosternum, presence or absence of the special sculpture at the base of the
pronotum, and general sculpture and punctuation.

In all species the dorsal surface of the neck has a fine transverse, slighdy reticulate
striation (shown only in PI. XV. figs. 3, 18), which may act against the front of the
pronotum as a stridulating organ.

An attempt to tabulate all the species has proved unsuccessful ; only the following
divisions can be made : —

Section I. Scutellum visible, distinct no. i.

Section II. Scutellum invisible.

II A. Diverging striae on metasternum and first abdominal segment curved
up behind coxae nos. 2 — 33.

II B. Diverging striae ending blindly, not curved up behind coxae ...no. 34.

The 32 species of division II A can only be placed in the following rough groups,
which it is hoped may possibly be of some assistance : —

Group 1. Forms at least 1^ mm. long, very distinctly punctured (or rugose, in
A. ornattis, no. 2), with no impressed area at base of thorax, first abdominal segment
as strongly punctured as metasternum. Metasternum not impressed nos. 2 — 9.

Group 2, Strongly sculptured forms, with larger punctures (but no impressed
area) at the base of the thorax ; with metasternum strongly punctured but first abdo-
minal segment almost impunctate. Mesosternum with no definite impression

nos. 10 and 1 1.

Group 3. Depressed, with punctures more or less aciculate, with impressed area
at base of thorax bounded in front by a transverse line [except in no. 12, A, waianaae,
where it is absent or indefinite]. Mesosternum impressed nos. 12 — 17.

Group 4. Forms in which the elytra are punctured only over a small area near
the suture ; with impressed area at base of thorax ; mesosternum impressed

nos. 18 and 19,

Group 5. With distinct, sometimes aciculate punctures* Keel of prosternum long
and narrow, 21^ to 3 times as long as broad. Mesosternum impressed, [No. 21,
A. monticola, has no impressed area at base of thorax. No. 20, A. similis, has a slight
one, and is in many ways related to Groups 3 and 4] nos. 20 and 21.

COLEOPTERA 515

Group 6. Broad forms, very finely punctured, with definite transverse impressed
line before base of thorax. Keel of prosternum 2\ to 3^ times as long as broad.
Mesosternum impressed nos. 22 and 23.

Group 7. Smooth, with punctuation very shallow and vague, or quite absent.
Basal thoracic impression absent or slight. Keel of prosternum about twice as long as
broad. Mesosternum impressed nos. 24 28.

Group 8, Very small, at most i mm. long, smooth. No impressed area at base
of thorax. Prosternum short, keel usually less than i^ times as long as broad. [Meso-
sternum impressed or not so.]

8 a. Elytra marked with fine curved scratches no. 29.

8 b. Almost or quite impunctate and without scratches nos. 30 — 33.

Section I. Scutellum visible.

(i) Acritus insularisy Sharp.

Acrittis insularis Sharp, Tr. Dublin Soc. ni. 1885, p. 129.

Plate XV. figs. 35, 36.

I have examined the type, found by Mr Blackburn, and one specimen found by
Mr Perkins.

The species is distinguished from all other known Hawaiian members of the genus
by the presence of a distinct triangular scutellum. Also the head bears numerous
punctures, almost as strong as those on the rest of the body (there is no transverse
suture before the antennae); there is a marked chain of punctures along the base of the
thorax, arcuate in the middle, the surface of the thorax between the arcuation and the
scutellum being impunctate. The remainder of the thorax, and the elytra, are evenly
and fairly strongly punctured; the propygidium and pygidium are numerously and
almost as strongly punctured as the rest.

On the underside the distinguishing character lies in the presence of a row of
coarse, somewhat elongate, punctures along the meso-metasternal suture. Keel of the
prosternum oblong, about if times as long as broad in the middle, punctured, with
surface slightly convex, striae slightly sinuate; metasternum strongly punctured at the
sides, punctures obsolete in the middle; first abdominal segment strongly punctured.
The striae on metasternum and first abdominal segment diverge considerably, but end
blindly, not curving up behind the coxae. The third ventral segment extends on to the
dorsal surface, appearing as a piece on either side in front of the propygidium. Colour
blackish-piceous, legs and antennae brown. Length i mm. Wings not examined.

Hab. Oahu. Near Honolulu (Blackburn) ; mountains near Honolulu (no. 758,
Perkins).

5i6 FAUNA HAWAIIENSIS

Section II. Scutellum invisible.
(2) Acritus minor, sp. nov.

Piceo-testaceus, nitidus, oblongo-ovalis ; capite parce punctato, sutura transversa
ante antennis distincta; prothorace crebre punctato; elytris crebre (et obsolete aciculatim)
punctatis, ad humeros et ad apices laevigatls; prosterno longo; in medio conspicue
elevato, striis antice late divergentibus ; mesosterno vage impresso, hoc et metasterno et
segmento abdominis primo crebre sed hand dense punctatis. Long. \\ mm.

The distinctive feature in the two Kauai specimens from which the description is
taken lies in the form of the keel of the prosternum. This is more than twice as long
as the breadth between the striae at the base; the base is rather narrow, the striae
diverge very widely in front, and the surface between them in the front part is raised
into a conspicuous elevation or blunt tubercle (PI. XV. figs. 1 and 2). The prothorax
has numerous punctures ; in one specimen they are larger and a little rugulose in the
median basal area, forming an approach to a definite basal sculpture. Elytra numerously
punctured, becoming smooth and impunctate towards the apices and towards the
shoulders ; their surface between the punctures shows vague wrinkles and inequalities.
Punctures on the mesosternum, &c., well-marked but not very close.

There is a specimen from Hawaii with the elevation on the prosternum, which
cannot be separated from the Kauai specimens. Also two other specimens, one from
Kauai and one from Hawaii, agreeing in all points with A. minor except in the form of
the prosternum. The keel lacks the elevation, and the striae, though divergent in front,
are less widely divergent. The relation of these to the typical specimens must remain
uncertain. I have not been able to see the wings in any specimens except one of these
doubtful examples; in which they are not reduced.

Hab. Kauai, Hawaii. — Kauai: Halemanu, 4000 ft; high plateau (nos. 504, 631,
682).— Hawaii: Kona, 3000 ft. — (Perkins.)

(3) Acritus ornatus, sp. nov.

Oblongo-ovalis, convexus, nitidus, piceus, pedibus piceo-ferrugineis; capite laevi,
parce et subtiliter punctato, sutura transversa ante antennis distincta; prothorace fortiter
ac dense aciculatim punctato; elytris dense strigoso-rugosis ; prosterno striis antice late
divergentibus, in medio antice parum elevato; mesosterno vix impresso, hoc et metasterno
crebre punctatis. Long. i| mm.

Plate XV. fig. 3.

This species is by the form of its prosternum closely allied to A. 77tinor, but very
much larger, and in its dorsal sculpture quite distinct from A. uiijior or any other
Hawaiian Acritus, The keel of the prosternum is about twice as long as the breadth
in its narrowest part; the stride curve outwards so widely in front, that the front margin

COLEOPTERA 5^7

is nearly twice as wide as the base; the surface in this wide part is elevated in the same
manner as in A, minor, but to a much less extent.

The prothorax bears very numerous, strong, rather short aciculate punctures, the
more anterior directed obliquely towards the middle line. The elytra have strong, very
close, rugae, directed longitudinally on the disc, those near the suture a little obliquely
towards the suture, those at the sides obliquely outwards; in the humeral area somewhat
obsolete. First ventral segment much less numerously punctured than the metasternum.
Two specimens, the second specimen much smaller and in a very bad state of preserva-
tion. Wings not examined.

Hab. Kauai; from the high plateau, viii. 1896 (no. 682, Perkins).

(4) Acrihis facilis, Sharp.

Aeletes facilis Sharp, Tr. Dublin Soc. in. 1885, p. 130.

I have examined the type and five other specimens collected by Mr Blackburn, We
have received only two specimens in Mr Perkins' collection. The original diagnosis is
as follows : — ** Oblongo-ovalis, convexus, piceus, nitidus, crebre punctulatus, punctis ad
elytrorum apicem densis et strigosis. Long, i^ mm."

Plate XV. fig. 4.

This species is very closely allied to A, katiaiensis, being chiefly distinguished by
its much smaller size and the absence of a distinct transverse suture before the antennae.
Like the preceding species, it is smooth and shining, with numerous punctures, varying
somewhat in size, but not very large or close, rather shallower on the thorax than in
A, katcatensis: the ends of the elytra are rugose: oblique elytral striae not present: the
striae at the sides of the prosternal keel diverge gradually from the base forwards:
mesosternum not at all impressed, meso-metasternal suture very faintly marked ; meso-
and metasterna and first abdominal segment wath numerous rather strong punctures,
becoming obsolete over the middle of the metasternum. Wings not examined.

Hab. Oahu: near Honolulu (Blackburn); mts. near Honolulu, 1900 (no. 758,
Perkins).

A crittis facilis, var. hawaiiensis, var. nov.

Minor, capite sutura distincta transversa ante antennis: long, i:^ mm.

There are two distinctly smaller, rather narrow specimens, each with a distinct line
across the head just in front of the antennae, but in all other respects agreeing with the
Oahu form.

Hab, Hawaii. Kona, over 4000 ft. (no. 231); Kilauea, no. 656 (Perkins).

5i8 FAUNA HAWAIIENSIS

(5) Acritus kauaiensisy sp. nov.

Oblongo-ovalis, nitidus, piceus, antennis pedibusque fusco-testaceis ; capite sutura
transversa ante antennis distincta, his parce punctatis; prothorace elytrisque crebre
punctatis, his ad aplcem longitudinaliter rugosis ; propygidio ac pygidio crebre subtiliter
punctatis; prosterno sat longo, striis per totam longitudinem leviter divergentibus;
mesosterno nullo modo impresso, crebre punctato ; metasterno crebre ac sat fortiter, in
medio obsolete, punctato. Long. corp. if mm.

This species is by far the largest of the Hawaiian members of the genus, and very
distinct. The surface between the punctures is smooth and shining. A distinct
transverse suture just in front of the antennae is present. Punctures on the thorax
numerous and evenly distributed, not very large or very close : the extreme base of the
thorax also is punctuated, but there is no special basal sculpture such as is found in many
congeners. Punctures on the elytra slightly stronger than on the thorax, towards the
apex drawn out into rugosities. Oblique elytral striae not present. Keel of the
prosternum (PL XV. fig. 5) about twice as long as broad at the base, slightly convex,
the striae diverging gradually from the base throughout their length. Mesosternum
without any impression, its surface quite continuous with that of the metasternum ; its
marginal stria continuous, but shallower in front in the middle ; meso-metasternal suture
very faint. Meso- and metasterna and first abdominal segment with numerous rather
strong punctures, except in the middle part of the metasternum, where they become very
small. Wings not reduced (PL XV. fig. 6).

Eighteen specimens. One, probably immature, decidedly smaller and lighter
coloured than the rest.

Hab. Kauai. Most from above Waimea, 4000 ft. &c. (no. 273); some from
Koholuamano, and some labelled ''high plateau," nos. 526, 682 ; (Perkins).

(6) Acritus molokaiae, sp. nov.

Oblongo-ovalis, ferrugineo-piceus, aegre nitidus linei transversa ante antennis vix
distincta ; prothorace elytrisque crebre ac sat subtiliter punctatis, his ad apicem subtiliter
rugosis; pygidio crebre subtiliter punctato; prosterno sat longo, subtiliter punctato, striis
antice conspicue divergentibus ; mesosterno crebre punctato. Long. corp. i^ mm.

A single specimen, of red-brown colour, darker along base of thorax and elytral
suture. Under a very high power the transverse suture in front of the antennae is
scarcely visible, while in A . punctattis, kukuiae and mauiae it is quite distinct even under
a lower power. The species is further distinguished by the fineness of the punctures
evenly distributed on prothorax and elytra, and the form of the keel of the prosternum.
This is nearly twice as long as the breadth at the base, and the striae diverge in front so
that the width of the front margin nearly equals the length of the keel. As in the three

COLEOPTERA 519

preceding species, the prosternum is distinctly punctured, an uncommon character in
Hawaiian Acritu The metasternal punctures become very small over a little area in
the middle ; meso-metasternal suture very faint.

This species forms in many respects a transition between A. kauaiensis and the
general type exemplified by A, mauiae, kukuiae and punctatus. It is much like
A, kauaiensis, having the apices of the elytra a litrie rugose; but is distinguished by
smaller size, microscopically rugulose surface, and absence of fronto-clypeal suture.
Wings not examined.

Hab. Molokai; 4500 ft. 23. ix. 1893 ("o. 161, Perkins).

(7) Acritus mauiae, sp. nov,

Oblongo-ovalis, piceus, nitidus ; prothorace elytrisque crebre, aequaliter, ac fortiter
punctatis, his ad apices parum rugosis ; pygidio sat fortiter punctato ; prosterno eo
A. punctaii pdimm angustiore, striis antice magis divergentibus ; mesosterno metasterno
et abdominis segmento primo crebre ac fortiter punctatis. Long, i^ mm,

We have only two specimens. The species is closely allied to A. punctatus and
A. kukuiae, but clearly distinguished by its punctuation and the form of the prosternum.

The prothorax is more strongly punctured than in either A, punctatus or A.
kukuiae. The elytral punctuation is stronger than that of A. kukuiae, not so close and
strong as that oi A . punctatus ] the humeral area where the punctuation becomes rather
obsolete is not specially marked. Pygidium more strongly punctured than that of
A, punctatus. In the two preceding species the punctuation of the thorax is very much
finer and shallower than that of the elytra ; in this species there is much less difference,
the thorax and elytra being very much alike in this respect. Prosternum with the keel
finely punctured, slightly convex, less nearly oblong, being slightly narrower with
striae more widely divergent in front. The punctures of the metasternum become
much smaller in the middle, but there is not (as in the two preceding species) a definite
area where the punctuation is obsolete. One specimen has two vague oblique striae
near the shoulder of either elytron. Transverse suture present on the head just
before the antennae. Wings not reduced.

Hab. Maui; Haleakala, between 4000 and 5000 ft. v. 1896 (nos. 599, 601,
Perkins).

(8) Acritus kukuiae, sp. nov.

Oblongo-ovalis, A, punctato affinis, sed elytris minus fortiter punctatis, punctis
ad humeros sat late obsoletis. Subtus fortiter sed rarius punctatus. Long, i^ mm.

We have three specimens. The species agrees with A. punctatus in all respects
except the following. The surface is rather smoother and more shining ; the elytral
punctures are smaller and the interspaces larger ; there is a considerable area towards
F. H. in. 67

520 FAUNA HAWAIIENSIS

the shoulder of each elytron where the punctuation becomes obsolete (PL XV. fig. 7).
(In many species the sculpture in the humeral area differs from that of the rest of the
elytra, being often obsolete : in this species the difference is exaggerated, so that a
marked smoother area is apparent towards the shoulder.) Beneath, the punctures are
large, but much less close than in A. punctatus. The head has a transverse suture
before the antennae. Wings not reduced.

Hab. Oahu; Waianae mts. iv. 1892, from Kukui wood (no. 7, Perkins).

(9) Acritus punctatus, sp. nov.

Ovalis, baud fortiter nitidus, piceo-niger, antennis pedibusque fusco-testaceis ;
prothorace crebre punctato ; elytris fortiter ac dense punctatis, ad apices parum rugosis ;
pygidio subtiliter punctato ; prosterno oblongo, striis subparallelis, antice parum diver-
gentibus ; mesosterno baud impresso ; hoc et metasterno et segmento abdominis primo
fortiter ac sat dense punctatis. Long. corp. i\ mm.

Plate XV. figs. 8, 9.

This species has a peculiar slightly dull appearance, partly due to closeness of the
punctures, partly to the surface between them being microscopically rugulose or aluta-
ceous. Head with some very fine punctures, the transverse suture just in front of the
antennae distinct. Prothorax with numerous punctures; a series of punctures along
the extreme base, but no special sculpture or impression before the base. Elytra with
large close punctures, extending right to the apices, where they are somewhat draw^n
out into rugosities. Oblique striae near the shoulder sometimes slightly marked.
Pygidium and propygidium with very fine, rather obsolete punctures. Presternum
with the keel slightly convex, finely punctured, oblong, about if times as long as its
breadth in the median portion, the striae nearly parallel, only slightly divergent in
front. Mesosternum, metasternum and first abdominal segment strongly punctured,
the punctures becoming very small and obsolete over only a small area in the middle
of the metasternum : meso-metasternal suture very faintly marked. Wings not reduced.
Seventeen specimens.

Hab, Kauai. Most from Makaweli, 2500 ft. (nos. 668, 703) ; some from above
Waimea, no. 273. (Perkins.)

(10) Acritus sculptuSy sp. nov.

Oblongo-ovalis, piceus, nitidus ; prothorace subtiliter, et interdum longitudinaliter
aciculatim, punctato, basin versus in medio sat fortiter punctato ; elytris disco fortissime
punctato, ad apices laevigatis et subtiliter aciculatim punctatis ; pygidio fere impunctato ;
prosterno lato, suboblongo, transversim convexo, impunctato ; mesosterno vage

COLEOPTERA 521

impresso, hoc et metasterno fortius punctatis, segmento primo abdominis fere impunc-
tato. Long, circa i^ mm.

Plate XV. figs. 10, II.

This species is distinguished by its remarkable sculpture. The prothorax has
before the base a median group of rather large simple punctures, and there are smaller
punctures extending along the base towards, but not to, the hind angles ; the rest of
the surface has very fine, rather rare, punctures, which in some specimens are drawn
out into marked longitudinal scratches. The disc of the elytra nearer the base has
numerous big strong punctures ; towards the apices the elytra are smoother, having
only fine rather rare punctures, more or less drawn out into longitudinal scratches.
Two oblique striae may be present near the shoulder of either elytron. Keel of
prosternum (PL XV. fig. 12) only about i^ as long as the breadth at the base, the
front margin almost same width as the base, the striae approaching one another
somewhat in the median part. Mesosternum very vaguely impressed, it and the
metasternum with numerous large punctures, which end abruptly at the suture between
metasternum and first abdominal segment ; the latter is impunctate excepting for a very
few small punctures, but has (like the pygidium) an extremely fine microscopic rugulosity
or alutaceoustiess of the surface. Wings not reduced. Six specimens.

Hab. Molokai ; 4000 ft., &c. (nos. 179, 191, 196, Perkins).

(11) Acritus makaweliae, sp. nov.

Oblongus, parum depressus, piceus, nitidus ; capite subtiliter ac rare punctato ;
prothorace subtiliter nee dense (interdum conspicue aciculatim) punctato, basin versus
in medio sat fortiter punctato; elytris basin versus fortiter nee dense punctatis, ad apices
subtilissime (interdum longitudinaliter aciculatim) punctatis ; prosterno suboblongo,
transversim convexo ; mesosterno et metasterno fortiter nee dense punctatis ; segmento
primo abdominis fere impunctato. Long, circa i mm.

This species is allied to A, sculptus, its scheme of sculpture being similar. It is
distinguished by its smaller size and somewhat depressed form ; the elytral punctures
are much smaller and further apart, so that the elytra (PI. XV. fig. 14) lack the coarse
rough appearance seen in A, sculptus\ the keel of the prosternum (PL XV. fig. 13) is
narrower in proportion to its length ; the meso- and metasternal punctures are smaller
and the interspaces between them larger. The species have a quite different general
appearance. The first abdominal segment of A. makaweliae is impunctate save for a
very few small punctures, but has not the microscopic striation seen in A, sculphis.

There are two distinct sets of specimens ; one in which the fine punctures of the
head, all the front part of the thorax, and the apical portions of the elytra are markedly
aciculate (i.e. drawn out into fine scratches) ; the other set in which they are quite simple
or only very slightly drawn out. All the specimens however were found in the same

67—2

522 FAUNA HAWAIIENSIS

locality, and within the same month. The same difference was noted between two
specimens of A, sculptus, I think it highly probable that it is a sexual distinction ^
In A, makaweliae it is to be noted that the presence of oblique striae on the elytra is
not correlated with the presence either of simple or aciculate punctures ; there are three
specimens, two in the aciculate, the third in the simple-punctured group, with two oblique
striae on either elytron, while in all other specimens the striae are not visible. Wings
not reduced. Eight specimens.

Hab, Kauai; all from Makaweli, 2500 ft. 11. 1897 (^o- ^68, Perkins).

(12) Acritus waianaae, sp. nov.

A. basalis van Sharp, Tr. Dublin Soc, iii. 1885, p. 226.

A, subbasali afflnis ; prothorace crebre punctato, ante basin in medio punctis parum
fortioribus (sed baud transversim impresso); elytris parum fortius, sat aciculatim,
punctatis ; prosterno eo A, stibbasalis parum latiore ; mesosterno impresso, punctato,
sed baud rugoso; metasterno fortius eo A, subbasalis punctato. Long. 1 mm.

A depressed form, much resembling A, subbasalis, but more strongly punctured.
The thoracic punctures become rather stronger in the mid-basal region, but there is no
definite transverse impressed line. Elytral punctuation coarser than in A. subbasalis,
the punctures slightly aciculate, but not drawn out into the sharp fine scratches seen in
that species and in A, germanus. The keel of the prosternum (PI. XV. fig. 15) is of
the same form as, but slightly broader than, that of A, subbasalis : mesosternum some-
what impressed and punctate, but quite lacking the rugosity seen in that species.
Metasternum with rather numerous punctures, first abdominal segment with very fine
rare punctures. Wings not examined. Two specimens.

Hab. Oahu. Waianae mountains : one specimen found by Blackburn, and pre-
viously labelled '' Aeletes basalis van"; the other found by Mr Perkins, iv. 1892 (no. 12).

(13) Acritus basalis (})^ Leconte.

Acritus basalis Sharp, Tr. Dublin Soc. iii. 1885, p. 226.

? Acritus basalis Leconte, Ann. Lye. Nat. Hist. v. p. 170; P. Ac. Philad. 1853,
p. 290.

Several specimens found by Mr Blackburn in mountain localities in Oahu were
referred to the N. American species A. basalis Leconte, stated by Horn (P. Amen
Phil. Soc. XIII. 1873, p. 357) to occur in the region near Fort Yuma, California. I
have examined four of these ; one is labelled ** Aeletes basalis,'' the other three were

' See J. Gerhardt, Deutsche ent. Zeitschr. 1903, p. 239. Two forms of the European Acritus nigricornis
were found in the same locality, one with simple punctures on the elytra, the other with aciculate punctures
(**Strichpunkturen"). Ten specimens of each were examined; all of the first form proved to be males, all of
the second females.

COLEOPTERA

523

each labelled '' Aeletes basalis van" Comparison with the material collected by
Mr Perkins has necessitated the placing of these four specimens in three different
species; one is included in A. subbasalis, another is placed with one specimen found
by Mr Perkins as A. waianaae.

There remain two (one being that labelled simply A. basalis) which, even though
there seems some uncertainty as to whether they really belong to the N. American
A. basalis, are quite distinct from either A. subbasalis or A. waianaae. The chief
distinction lies in the form of the keel of the prosternum (PI. XV. fig. 16) which is
broader (about twice as long as broad), oblong, with the striae almost parallel, so that
the breadth of the keel is almost the same throughout its length ; the front margin and
striae are thick. The form is depressed. The thorax and elytra have numerous some-
what aciculate punctures; the punctuation is coarser than that of A, subbasalis, more
like that of A, waianaae. But unlike A, waianaae, the thorax has a distinct rugosely
sculptured mid-basal area, bounded in front by a slightly arcuate line. The specimens
are rather larger than those of A, sjibbasalis and A, ivaianaae, one being nearly i^ mm.
long. The mesosternum is impressed and somewhat rugosely punctured, metasternum
finely punctured, first abdominal segment scarcely punctured. Wings not examined.

Hab. Oahu; neighbourhood of Honolulu (Blackburn).

(14) Acritus gej^manus, sp. nov.

A, sub basali ^ffinis, sed prothorace et elytris fortius aciculatim punctatis ; prosterni
striis antice magis divergentibus. Long, circa i mm.

Another depressed form, with marked basal thoracic rugosity and impression.
Very like A, subbasalis ; but the thoracic punctures are aciculate as well as the elytral,
and the aciculate punctures as a whole are more marked ; the keel of the prosternum is
long and rather narrow as in ^. subbasalis, but the striae diverge considerably, so that
the front margin is much wider than the base. More than one oblique stria can be seen
on either elytron ; the metasternum in both specimens is proportionately rather long.
Wings not examined. Two specimens, one distinctly smaller.

Hab. Oahu. Kaala mts., 2500 ft. xii. 1892 (no. 53); Mokuleiia, v. 1901, no. 752.
(Perkins.)

(15) Acritus subbasalis, sp. nov.

A. basalis var. Sharp, Tr. Dublin Soc. iir. 1885, p. 226.

Depressus, oblongus, piceo-testaceus, nitidus ; prothorace subtiliter punctato, ante
basin in medio transversim impresso ac rugoso ; elytris subtiliter aciculatim (vel interdum
simpliciter) punctatis; prosterno longo, angusto; mesosterno impresso et rugose punctato;
metasterno et segmento primo abdominis subtiliter nee dense punctatis. Long, i mm.

Plate XV. fig. 17, pro- and mesosterna.

524 FAUNA HAWAIIENSIS

The general form is decidedly depressed. The prothorax has numerous fine
punctures. In the median basal region is an impressed and shallowly rugose arc,
bounded in front by a well-defined, transverse, slightly arcuate line. Elytral punctures
sometimes very fine points, scarcely drawn out, sometimes fine elongate scratches ;
oblique stria near the shoulder very slightly marked. Prosternum about 2\ times as
long as the breadth at the base, the striae curving towards one another medially, slightly
divergent anteriorly, front margin of nearly the same width as the base. Mesosternum
rugulose, with a conspicuous, roughly triangular impression. Punctures on the meta-
sternum and first abdominal segment fine and not very close.

The single specimen from Lanai agrees in colour and size with the type, but in
sculpture approaches a little to A, eutretus. Eight specimens. Wings not reduced,
examined in five Oahu specimens.

Hab. Oahu, Lanai. — Oahu ; seven specimens from the mountains near Honolulu,
VIII. 1900 (no. 785, Perkins); also one specimen, previously labelled '' Aeletes basalts
van'', from the Waianae mts. (Blackburn). — Lanai; near Waipaa, about 2000 ft. (no. 104,
Perkins).

(16) Acritus eutretus, sp. nov.

Depressus, oblongus, piceus, nitidus ; A. subbasali afifinis, sed major ; prothorace
subtiliter nee dense punctato, ante basin in medio rugoso, linea impressa arcuatsl; elytris
subtiliter sed conspicue aciculatim punctatis ; prosterno longo, angusto, striis subparallelis ;
mesosterno impresso, parum rugose punctato, metasterno subtiliter punctato. Long,
i^ mm.

Plate XV. fig. 18.

Distinguished from A, subbasalis by the much larger size and darker colour, and
by the sculpture of the elytra, which are marked with numerous fine punctures, drawn
out before and behind into very fine, much elongated scratches. This form of sculpture
ceases abruptly towards the shoulder in the region of the posterior oblique stria in the
three Hawaii specimens ; in the one from Oahu the scratches do not cease in the
humeral area, but are altered in direction, and oblique. The prosternum is over twice
as long as its breadth between the striae in the median part, and its breadth alters but
little throughout its length.

It is possible that this form may prove to be a large and marked variety of
A, subbasalis, but with the material at hand it seems better to give it a name. Four
specimens. Wings not reduced.

Hab. Hawaii, Oahu.— Hawaii ; Kilauea (nos. 531, 691).— Oahu; Mokuleiia, v.
1901 (no. 752). — (Perkins.)

COLEOPTERA 525

(17) Acritus sp. ?

There is a single specimen from Hawaii which does not appear to fall within the
limits of any of the described species. It has the depressed form of A. etitretus, but
the punctuation on the elytra is reduced, and like that of A, nepos. Moreover the keel
of the prosternum is broader than that of either A. nepos or A. etctretus: it is oblong,
only just twice as long as broad, with striae nearly parallel ; in its proportion of length
to breadth it resembles that of ^. basalts as described on p. 523. The metasternum is
scarcely punctured. Wings not examined.

Hab. Hawaii; Olaa, xi. 1896 (no. 635, Perkins).

(18) Acritus lanaiensis, sp. nov.

Ovalis, nigro-piceus, antennis pedibusque fusco-testaceis ; baud fortiter nitidus ;
prothorace subtiliter et obsolete punctato, ante basin in medio rugoso, linea transversa
impress^ ; elytris suturam versus punctatis, punctis ad latera et ad apices late obsoletis ;
prosterno sat longo, impunctato, inter strias concavo, striis subparallelis, fere rectis ;
mesosterno conspicue impresso, metasterno et segmento primo abdominis subtiliter
punctatis. Long, i^ mm.

Plate XV. fig. 19; fig. 20, pro- and mesosterna.

The surface is seen under the microscope to be very minutely rugulose, and it has
a characteristic, relatively dull, appearance. The prothoracic punctures are very fine
and shallow; the basal sculpture is conspicuous, there being a median impressed and
rugose area, bounded in front by a nearly straight line. On the elytra the punctures
are restricted to a small area near the suture in the basal portion, a wide lateral part of
the disc, and a broad apical portion, being impunctate. The chief character lies in the
form of the prosternum, the keel of which is distinctly concave between the striae, a
condition not found in any other known Hawaiian member of the genus (PI. XV.
fig. 20) : it is about twice as long as the breadth between the striae ; the striae are
nearly parallel and straight. There is a conspicuous impression on the mesosternum ;
metasternum finely punctured.

In one specimen the elytral punctures are slightly aciculate and extend over a
much larger area : this form is intermediate between that with the much reduced punc-
tuation, and the var. sculptilis. Wings not examined. Seven specimens.

Hab. Lanai ; 2000—3000 ft. (nos. 83, 93, &c., Perkins).

Acritus lanaiensis, var. sculptilis, var. nov.

Fortius punctatus ; prothoracis punctis parum fortioribus ; elytris crebre aciculatim
punctatis, punctis ad latera baud late obsoletis; prosterno distincte punctato, angustiore;
mesosterno rugose punctato, metasterno et segmento primo fortiter punctatis.

526 FAUNA HAWAIIENSIS

Agrees in colour, shape, size, and in the character of its surface, with the type ;
basal thoracic sculpture also similar. The prothoracic punctures are stronger. The
elytra bear numerous aciculate punctures not confined to a small area, extending over
the disc. Meso- and metasterna fairly strongly punctured. The prosternum too is
distinctly punctured; its keel is concave between the striae as in the type, but is
narrower, being more nearly three times as long as broad.

Though this form is in many respects distinctly different from the type, it appears
better not to make it a distinct species, as the two forms have many important points in
common, especially the concave prosternal keel. They are from the same locality.
There exists always the possibility of differences being sexual. Wings not examined.
Three specimens.

Hab. Lanai; about 2000 ft. (nos. 84, 91, 92, Perkins).

(19) Acritus nepos, sp. nov.

Oblongo-ovalis, piceus, nitidus; prothorace subtiliter nee dense punctato, ante basin
in medio rugoso, linei transversa impress^ parum arcuati ; elytris suturam versus
punctatis (interdum parum aciculatim), punctis ad latera et ad apices late obsoletis ;
prosterno sat longo et angusto, mesosterno impresso et rugose punctato, metasterno
subtiliter punctato. Long, i — i^ mm.

This is a less oblong and depressed form than A, eutretus. The chief distinction
lies in the sculpture of the elytra, the punctuation of which is confined to the region
near the suture, and becomes obsolete over a considerable part of the disc towards the
sides, and towards the apices. In many respects this species is like A, lanaiensiSy but
is more shining, and has the prosternum of different form. The keel of the latter is
rather long and narrow (a little over twice as long as the breadth in the middle), but
the surface is not concave, but slightly convex.

The five specimens show considerable variation, but it is not possible to separate
them. There are two large ones from Makaweli (Kauai), one of which has the elytra
more strongly punctured, and the punctures more aciculate, than the rest : this specimen
also shows a number of very fine longitudinal scratches or striae on the back part of the
mesosternal impression and front part of the metasternum. The other large specimen
has the punctuated part of the elytra reduced to a very small area, the remainder being
quite smooth. The three remaining specimens are very much smaller : one is from
Waimea (Kauai), the other two from Oahu. Wings not reduced.

Hab, Kauai, Oahu. — Kauai ; Makaweli, 2500 ft. (no. 703) ; Waimea, 4000 ft. —
Oahu ; Waianae mts. (no. 4). — (Perkins.)

COLEOPTERA 527

Acrittis nepoSy var. ?

A single specimen from Molokai agrees in all other respects with A, nepos, but
has the prosternum proportionately longer ; the keel being three times as long as it is
broad in the middle. This character brings the specimen near to A, similis (also from
Molokai), which has however numerous elytral punctures not at all confined to a small
part of the disc. The wings are not reduced.

Hab. Molokai, 4500 feet and upwards, 11, iv. 1893 (no. 159, Perkins).

(20) Acritus similis, sp. no v.

Oblongo-ovalis, piceus, nitidus ; fronte sat crebre punctato ; prothorace crebre
punctato, ante basin in medio lined impressa parum arcuata ; elytris crebre ac sat fortiter
punctatis ; prosterno longo, angusto, striis subparallelis ; mesosterno parum impresso,
hoc et metasterno crebre et sat fortiter punctatis. Long, i^ mm.

The single specimen differs from its allies in having fairly numerous and strong
punctures on the frons. Prothorax and elytra are frequently and moderately strongly
punctured, in addition to which there is a basal thoracic rugose area, bounded in front
by an impressed line. The keel of the prosternum is long and narrow, about three
times as long as its breadth in the middle ; the striae are very little curved, the base
slightly broader than the front margin. Metasternum slightly impressed ; it and the
metasternum numerously and fairly strongly punctured, the first abdominal segment less
strongly punctured.

The conjunction in one individual of the fairly strong punctuation, basal thoracic
sculpture, and long narrow prosternum, distinguish this specimen from any others that
we have received. Wings not reduced.

Hab. Molokai, 11. iv. 1893 (Perkins).

(21) Ac7ntus monticola, Blackburn.

Aeletes monticola Blackburn, Tn Dublin Soc. iii. 1885, p. 130.

I have examined Mr Blackburn's type of this species. We have one specimen
which can without hesitation be referred to it. The keel of the prosternum is long, but
proportionately broader than in A. angustisternum^ being between 2\ and 3 times as long
as its breadth in the middle : the greater proportionate breadth is largely due to the
striae being much more nearly parallel than in A. angustisternunty in which species they
curve conspicuously towards one another in the middle portion. The mesosternum is
impressed, with very fine shallow punctures, but not rugose. Blackburn could find no
punctures on the metasternum, but the microscope reveals numerous very fine punctures
in our specimen. The form is rather narrow and convex, the colour is very blackish

F. H. III. 68

528 FAUNA HAWAIIENSIS

with pitchy brown legs and antennae, the upper surface with very fine but distinct and
numerous punctures evenly distributed, drawn out often into fine rugosities, and in
our specimen finely aciculate. There is no special sculpture at the base of the thorax.
Length i\ mm.

We have also two other specimens, with the keel of the prosternum proportionately
narrower, and more like that of A, angustistermim, and the punctures on the upper
surface not at all aciculate. These therefore vary slightly from the type. Wings not
reduced.

Hab. Maui. All from Haleakala ; the type from 5000 ft. (Blackburn); 5000 ft.
and over (nos. 121, 128, 661, Perkins).

{22) Acritus pulchellus, sp. nov.

Sat latus, piceus, laevis, subtile punctulatus ; prothoracis basi in medio rugosa ;
prosterno angusto, striis rectis fereque parallelis ; mesosterno impresso, sat rugose
punctato ; metasterno subtile punctulato. Long, fere \\ mm.

This species is of the same size as A, monticola, but slightly broader, with the
general surface not rugulose, with the fine punctures more distinct but never aciculate ;
with a rugulose area in the mid-basal part of the thorax, giving the appearance of a
marked transverse impressed line just in front of the base ; with the keel of the proster-
num flat and over 2\ times as long as broad in the middle, the striae straight and almost
parallel.

We have two pairs of specimens, one from Maui, the other from Molokai. The
Maui specimens have a well-defined lighter, testaceous, area in the distal half of either
elytron ; one of them has marked rugulosities at the bases of the elytra. The punctua-
tion of the underside is especially distinct in Molokai specimens. Wings not reduced.

Hab. Maui, Molokai. — Maui; Olinda, 4000 ft. iii. 1894 (no. 112). — Molokai, no
particulars. — (Perkins.)

(23) Acritus angustistermmi, sp. nov.

Sat late ovalis, testaceus, nitidus, supra subtilissime punctulatus ac elytris interdum
subtilissime rugulosis ; pedibus longis ; prothorace ad mediam basin rugose punctato ;
prosterno conspicue elongato ac angusto ; mesosterno impresso, rugoso ; metasterno
subtilissime punctulato. Long, circa i^ mm.

Plate XV. fig. 21.

This is a somewhat broad long-legged species ; the minute, shallow punctures and
rugulosities vary in amount. Across the median basal portion of the thorax is a series
of punctures and sculpture, appearing in some aspects as a marked transverse line or
depression. The chief character lies in the form of the keel of the prosternum (PI. XV.
fig. 22), which is about 3^ times as long as its breadth in the narrowest portion; the

COLEOPTERA 529

striae curve slightly inwards in its median part. The mesosternum is rugosely punc-
tured. Wings not examined. Seven specimens.

Hab. Maui, all from Haleakala, 5000 ft. and over (no. 381, Perkins).

(24) Acritus perktnsiy sp. no v.

Sat late ovalis, fusco-testaceus, nitidus, supra obsolete punctulatus ac interdum
inaequalis ; pedibus longis ; prothoracis basi punctata ac in medio baud profunde
impressa ; prosterno baud angusto ; mesosterno impresso, rugose punctato. Long,
circa i^ mm.

This rather broad, long-legged species is sometimes smooth, but frequently has a
peculiar wrinkled appearance due to the presence of minute punctures and inequalities.
In general form it is very like A, angustistermmi, but is at once distinguished by the
prosternum, which is shorter, and has the keel (PL XV, fig. 23) little more than twice
as long as its breadth in the median portion. There is also a difference in the sculpture
of the base of the thorax. In A. angustisternMin the basal punctures and sculpture
form a transverse line, just in front of the actual base, most marked in the middle, and
extending some distance on either side. In A, perkinsi there is a shallow median
depression, not extending far transversely; and on either side, as far as the posterior
angle of the thorax, the actual base is punctured, and so has a beaded appearance
(PL XV. fig. 24).

The surface of the mesosternum is rugose. Wings not examined. Ten specimens.

Hab. Molokai, 4500 ft., highest forest, &c. (nos. 155, 163, Perkins).

(25) Acritus longipes, Sharp.

Aeletes longipes Sharp, Tr. Dublin Soc. iii. 1885, p. 129 and pi. iv. fig. 13.

I have examined the type and a smaller specimen of this species, found by Black-
burn in Hawaii. The legs are conspicuously slender and long. The general form is
rather narrow. A high power shows the surface to have some minute punctures and
inequalities ; there is a slight median impression at the base of the thorax. Keel of the
prosternum about twice as long as broad, the front margin only slightly wider than the
base, the surface rather convex. A marked depression is present on the mesosternum
and front part of the metasternum. Length of the type i\ mm. The wings are much
reduced, but to exactly what extent I have been unable to determine.

Hab. Hawaii (the type from Mauna Loa, over 4000 ft., Blackburn). ? Lanai
and Maui (see below).

Mr Perkins 'has obtained no specimens quite agreeing with the typical A, longipes,
but there are several specimens from other islands, the relation of which to A, longipes
and to one another is somewhat doubtful. Blackburn (op. cit. p. 226) states that he
found small specimens, apparently referable to A, longipes, on Lanai and Maui.

68—2

530 FAUNA HAWAIIENSIS

Acritus longipes var. kaleakahe, van no v.

Fusco-ferrugineus, prothorace subtiliter ac obsolete punctato, ad mediam basin
impresso ac ruguloso ; elytris obsolete aciculatim punctatis.

There are two rather large specimens, having the obsolete punctuation and basal
thoracic sculpture more marked, so that they present a decidedly wrinkled appearance.
In this respect they approach slightly to another species found in the same habitat,
A. monticola, but are at once distinguished by the much broader prosternum, lighter
colour, slender legs, and basal thoracic impression. The surface of the mesosternal
impression bears an obsolete punctuation or rugulosity. The wings are reduced, being
considerably shorter than the elytra.

Hab. Maui, Haleakala, 5000 ft. (Perkins).

(26) Acritus laeviSj sp. nov.

Ferrugineus, laevis, impunctatus ; pedibus longis et tenuibus ; prothorace ante
basin baud impresso ; prosterno ei A, longipedis sat simili ; mesosterno baud fortiter
impresso. Long, i^ mm.

A single specimen is like A, longipes in general form and in having long slender
legs, but is quite smooth and impunctate, without any basal thoracic impression or mark.
The prosternum is slightly broader than in A. longipes, but whether the difference is
sufficient to prove a specific character is uncertain. I have been unable to examine the
wings.

Hab, Kauai, Halemanu, 4000 ft. v. 1895 (no. 504, Perkins).

(27) Acritus subalatMS, sp. nov.

Piceus, laevis, impunctatus, nitidus; pedibus sat tenuibus; prothorace ante basin
baud impresso; alis abbreviatis, elytris curtioribus ; prosterno parum convexo, striis
antice divergentibus ; mesosterno impresso. Long, i mm.

Plate XV. fig. 25.

This dark, smooth and quite impunctate species, with rather long slender legs, is
the only one in which it has been possible satisfactorily to examine the reduced wings.
The wing is about ^ as long as the elytron ; the proportionate lengths of w^ing and
elytron are shown in PL XV. fig. 26, and can be compared with those between wing and
elytron of A. kauaiensis, shown in Plate XV. figs. 6 and 6 a:.

The keel of the prosternum is not quite twice as long as its breadth at the base ;
the base is broad, and the striae scarcely diverge in the basal part, but do so anteriorly.
Two specimens.

There are two specimens from Molokai, which are larger than those from Lanai
(being \\ mm. long), and with the prosternal keel proportionately broader. The wings

COLEOPTERA 531

are reduced, but it has not been possible with so little material to determine to what
extent : it is possible they are even more reduced than those of the Lanai A. subalatiis,
I have included the Molokai specimens in the species. A third and smaller Molokai
specimen, the wings of which it has been impossible to examine, appears inseparable.

Hab. Lanai, Molokai. — Lanai ; 2000 — 3000 ft, — Molokai ; two from 3000 ft., the
third (the wings of which I have been unable to examine) from 6000 ft. 22. vi. 1893
(no. 192). — (Perkins.)

(28) Acritus angustusy sp. nov.

Ovalis, parum angustus, piceus, nitidus, impunctatus, laevis ; prosterno sat longo,
striis per totam longitudinem leviter divergentibus ; mesosterno impresso. Long, i mm.

Smooth, impunctate, rather narrowly oval, with legs not extra long, and impressed
mesosternum. Distinguished by the form of the keel of the prosternum, which has a
narrow base, and is about twice as long as its breadth at the base, with the striae
gradually diverging throughout their length from behind forwards.

A specimen from Kauai appears referable to this species. Wings not examined.

Hab. Hawaii, Kauai. — Hawaii; Olaa, xii. 1896. — Kauai; Halemanu, 4000 ft.
V. 1895 (no. 504). — (Perkins.)

(29) Acritus concentricus, Sharp.

Aeletes concentricus Sharp, Tr. Dublin Soc. iii. 1885, p. 130.

Plate XV. fig. 27.

I have examined the type of this species, which has not been obtained by
Mr Perkins. It is a small, rather narrow and convex form, at once distinguished from
all its congeners by the arrangement of the fine striae on the elytra; those in the basal
region near the suture ** being nearly longitudinal in their direction; those outside them
are curved inwards towards the suture behind, while the scratches on the more posterior
portion are nearly transverse in direction." The pronotum bears very fine obsolete
scratches. Keel of the prosternum short and broad, only i^ times as long as its breadth
in the middle, slighdy convex transversely, the striae diverging slighdy in front
Mesosternum without any impression ; it and the metasternum quite impunctate, the
suture between them scarcely visible. Length x mm. Wings not examined.

In the original description the mention of striae '* about the scutellum" must not be
taken to imply the presence of any visible sclerite of that name ; under a high power it
is seen that there is absolutely no visible scutellum.

Hab. Maui(?). Blackburn (op. cit. p. 226) states ** occurs in wood at an elevation
of about 4000 ft. on Haleakala, Maui." (Dr Sharp, op. cit. p. 140, states that the type
was found by Blackburn in the mountains near Honolulu, Oahu.)

532 FAUNA HAWAIIENSIS

(30) Acritus flavitarsis^ Lewis.

Aeletes flavitarsis Lewis, Ent Mo. Mag. xvi. p. 79.

Plate XV. fig. 28.

I have examined one of the original specimens found by Mr Blackburn. Mr Perkins
has not obtained this species. A, flavitarsis is very clearly distinguished from the other
very small species, A, subrotundus and A, parvuhis. Its form is oblong and narrow.
The prosternum (PL XV. fig. 29) is as short as that of A. subrotundus, but has its base
narrow, only about \ as broad as its front margin between the striae: in front it is
medially elevated and rather strongly arched. Meso- and metasterna and first abdominal
segment decidedly flattened (the former not impressed), the two latter with extremely
fine, very rare, punctures. Suture between the meso- and metasterna distinct. A
beaded border, formed by a row of fine impressions, is present along the inner sides of
the prosternal striae, and along the lateral mesosternal marginal striae. It is continued,
much more sharply marked, along the diverging striae on the metasternum and first
abdominal segment. The upper surface has extremely fine rare punctures. Legs rather
long. Colour of specimen examined testaceous, length just over f mfn. Wings not
examined.

Hab. Oahu, specimen examined recorded from near Honolulu (Blackburn). (Two
specimens in the British Museum obtained by Blackburn, placed as this species, belong
to A. subrotundus q. v.)

(31) Acritus solitarius, sp. (?) no v.

Laevis, nitidus, supra impunctatus ; prosterno curto, ei A. flavitarsis sat simili ;
mesosterno impresso; metasterno in medio sat crebre punctulato. Long, circa i mm.

There is a single specimen having the keel of its prosternum short, with rather
narrow base, and striae widely diverging in front. In this respect the specimen comes
close to A. flavitarsis, but is decidedly larger, relatively broader, and with only faintly
marked beaded borders. I have given it a name, though it is uncertain whether it may
not prove to be a large variety of A, flavitarsis.

The metasternum is distinctly punctured, the punctures in the middle being rather
close and forming a conspicuous group. Wings not examined. -

Hab, Oahu, back of Tantalus, vi. 1901 (no. 781, Perkins).

(32) Acritus insolitus, sp. nov.

Oblongo-ovalis, piceus, nitidus, impunctatus; prosterno conspicue curto ac lato ;
mesosterno et parte anteriore metasterni longitudinaliter impressis. Long* i mm.
Plate XV. fig. 30, the sterna.
This is a smooth impunctate form without conspicuously long legs. Certain

COLEOPTERA

533

characteristics of A. politus Leconte and A, brevisternus de Marseul, as described by
Horn (P. Amer. Phil Soc. xiii. 1873, P- 35^), appear to be combined in it As in
A, politus, the mesosternum (PI. XV. fig. 30) has a longitudinal impression or furrow
extending on to the front part of the metasternum ; a form of impression not yet found
in any other Hawaiian Acritus, for in all other cases the impression has a wide, roughly
triangular form, and is almost confined to the mesosternum. The prosternum is more
like that oi A. brevisternus, the keel (PI XV. fig. 31) being only \\ times as long as the
breadth in the narrowest part, and with a broad base. There is however no transverse
row of punctures between meso- and metasterna as in A, brevister7ius. In the form of
the prosternum the species is like A, subrotundus, but is easily distinguished by larger
size, less round form, by the mesosternal furrow, and the diverging striae on meta-
sternum and first abdominal segment not being obliterated posteriorly.

We have only one specimen. Wings not reduced.

Hab. Kauai, Halemanu, 4000 ft. v. 1895 (^<^- 5^4, Perkins),

{^'^'^ Acrittts parvulus, sp. no v.

Fortiter nitidus, nigricans, parum depressus ; prothorace elytrisque subtilissime ac
obsolete punctulatis ; prosterno longiore eo A. stibrotundi ; metasterno et mesosterno
convexo, hoc nullo modo impresso. Long, circa f mm.

This species, with A. subrotundus and A, flavitarsis, is of the smallest size found
in the genus. Dorsally it is very slighdy depressed, and the punctuation appears as
numerous exceedingly fine inequalities of the surface.

In form it is more oblong than A, subrotundus, but not so narrow as A, Jiavitarsis,
The prosternum (PI. XV. fig. 32) in length is intermediate between the very short form
found e.g. in A. subrotundus, and the longer form found in A, longipes : in general
shape it is saddle-like, forming an arch transversely, and with the lateral parts having
rather concave-curved surfaces longitudinally ; the striae diverge considerably in front ;
in one specimen they are obliterated near the anterior margin. The species agrees
with A. subrotundus in having the mesosternum convex, but is at once distinguished
from it by the diverging striae not being obliterated posteriorly. The meso- and
metasterna bear excessively minute punctures, only visible under a high power ; suture
between them visible. Three specimens. Wings not reduced, examined in all three
specimens.

Hab. Lanai, 2000 and 3000 ft. (nos. 92, 93, Perkins).

(34) Acritus subrotundus, sp. nov.

Ovalis, convexus, niger, fortiter nitidus, impunctatus ; pedibus baud longis ; pro-
sterno curto, basi conspicue lato ; infra fortiter convexus, mesosterno nullo modo impresso.
Long, circa f mm.

Plate XV. fig. 33.

534 FAUNA HAWAIIENSIS

The unique example obtained by Mr Perkins is unfortunately in very bad preser-
vation, but still serves to show very clearly the distinguishing features. This species
is at once distinguished from all other Hawaiian members of the genus by two
characters: (i) the diverging striae on the metasternum and first abdominal segment
are quite obliterated posteriorly, ending blindly in the region where they would normally
curve round behind the coxae ; (2) the prosternum is not only very short, but its width
between the striae at the base equals f (or more) of its length, and the striae diverge
litde in front (PL XV. fig. 34).

* The relatively broad, oval form, the total absence of punctures, and the strong
convexity of meso- and metasterna are also noteworthy characters. The mesosternum
is short, the suture between it and the metasternum fine but distinct. In addition
to the example obtained by Perkins, I have examined two in the British Museum,
obtained by Blackburn, placed as A, fiavitarsis, but undoubtedly of this species.
Wings not examined.

Hab. Oahu, back of Tantalus, vi. 1901 (no. 781. Perkins).

Fam. SCAPHIDIIDAE\

ScAPHisoMA Leach.

Scapkisoma Leach, Edinb. Encycl. ix. 1812, p. 89; Erichson, Nat. Ins. Deutsch.
III. 1848, p. 8.

( I ) Scapkisoma perkinsi, sp. nov.

Sat angustus, ovalis, convexus, nitidus, niger, elytrorum apicibus late flavo-testaceis,
pedibus antennisque testaceis, his apicem versus parum infuscatis ; capite laevi, fere
impunctato ; prothorace antrorsum fortiter angustato, subtilissime punctato ; elytris sat
fortiter, aequaliter nee dense punctatis, stria suturali antice baud arcuata ; abdominis
apice testaceo. Long. corp. (sine capite) fere \\ mm.

A graceful, narrow (but not extremely narrow) form, shining black, with the
apices of the elytra broadly pale yellow-testaceous. The thoracic punctuation is so
fine as to be only with difficulty visible. The elytral punctures are well marked, but
not very close. The sutural stria is well marked, and does not curve outwards at its
anterior end. The prothorax is much narrowed in front, and its front margin is some-
times very narrowly testaceo-piceous. As it seems not very likely that a Scapkisoma
would be introduced, I have described this species, although there are a number of
species with which it has not been possible to compare it. Of those which I have seen,
the Central American 6^ longicolle Matthews somewhat approaches it. The chief
characters of 5. perkinsi appear to be the broadness of the pale apical part of the

1 By Hugh Scott.

COLEOPTERA 535

elytra, the rather narrow form, and the straight anterior endings of the sutural striae.
Five specimens. One, which is piceous-brown instead of black, is possibly immature.

Hab. Oahu. Mokuleiia ; Waianae mts., from fungus; Kaala mts., 1500 ft, from
decaying trees ; (Perkins).

Fam. SILPHIDAE\

Clambus, Fischer.
Clambus Fischer, Ent. Russ. i. 1820, Gen. p. 52.

(i) Clambus, sp. ?

A single specimen appears, after close comparison with British members of the
genus, to be referable to Clambus. It does not agree specifically with the British forms.
The head bears some extremely fine punctures and very scanty pubescence. The
prothorax and elytra are quite glabrous, smooth, and shining, and strongly convex.
There is some very scanty pubescence beneath. The elytra are piceous ; the head also
dark, lighter near the front margin ; the prothorax and legs are testaceous ; more or
less infuscated ; the antennae similar, except for the two-jointed club, which is darker.
Length with head and prothorax extended about if mm.

Hab. Found at Kilauea, Hawaii, ix. 1896 (no. 685, Perkins). .-^ Introduced.

Fam. TRICHOPTERYGIDAE^
In this family, the material which we have received is very small, and in some
cases insufficient for satisfactory examination. When more exhaustively collected, the
species may prove to be numerous.

AcTiDiUM, Matthews.
Actidium Matthews, Ent. Mo. Mag. v. 1868, p. 12 ; Trichopterygia (London),
1872, p. 86 and pi. vii.

(i) Actidium sharpianum, Matthews.
Actidium sharpianum Matthews, Cist. Ent. iii. 1882, p. 39 and pi n. fig. 2 ;
Trichop. Supplement, 1900, p. 94: Sharp, Tr. Dublin Soc. in. 1885, p. 225.
We have not received this species from Mr Perkins.
Hab. Oahu. Under bark in mountain forests (Blackburn).

Ptiliodes, Matthews.
Ptiliodes Matthews, Cist. Ent. iii. 1882, p. 40; Trichop. Supplement, 1900, p. 75
and pi. XIII. B.

1 By Hugh Scott.

F. H. III. 69

536 FAUNA HAWAIIENSIS

(i) Ptiliodes blackburni, Matthews.

Ptiliodes blackburni Matthews, Cist. Ent. in. p. 41 ; Trichop. Sup. p. 76, Sharp, L c.

A small form of short, contracted appearance, with antennae rather short, with
the prothorax transverse, nearly quadrate, with the hind angles almost right angles.
Matthews' figure (Trichop. Sup. pi. xiii. fig. b. 7) of the antenna is not altogether
correct : joints 6 — 9 are not really such simple ova] structures as there depicted, but
more ampulliform : joints 3 — 8 are however slightly narrower than the corresponding
ones of the species described below.

Hab. Oahu. Under bark (Blackburn).

I have looked all through the British Museum collection of Trichopterygidae,
which contains that formed by Matthews, without finding anything which specifically
resembles the two following species ; which appear to be undoubtedly new. I am
not quite certain to which genus they should be referred ; whether to Ptiliodes or
Nephanes,

They are chiefly characterised by the form of the prothorax, which is transverse,
rather broad, not steeply sloping at the sides, with the sides rounded and curving in
posteriorly, so that the hind angles are much rounded off. The antennae are moderately
long, 1 1 -jointed, with the joints ampulliform. The maxillae appear to be like those of
Nephanes, The middle coxae are almost contiguous ; the mesosternum slightly elevated,
not keeled. The hind coxae are very remote, short (from base to apex), with a narrow
lamina on the external margin in the apical portion only : the metasternal margin
between them is straight. The apex of the abdomen is not sharply acuminate.

Matthews stated (Trichop. Sup. p. 76) that he was inclined to place Ptiliodes next
to Nephanes, Thomson, When the species described below are placed side by side
with Ptiliodes, the structure of their under surface closely resembles that of Ptiliodes ;
more closely than it resembles that of certain Nephanes, The short hind coxae are
also characteristic of Ptiliodes ; but the presence of the marginal lamina only in the
apical portion is characteristic of Nephanes : for Matthews describes and figures the
hind coxa of Ptiliodes blackburni as having a broad rounded lamina extending the whole
length of the margin. Insufficiency of material prevents me from making a Balsam
preparation of the hind coxa of P, blackburni in order to examine it accurately : I
cannot discover that Matthews made any such preparation.

The two following species are placed provisionally in Ptiliodes,

(2) Ptiliodes insignis, sp. nov.

Elongato-oblongus, sat depressus, aegre nitidus, tote alutaceus, piceus antennis
pedibusque testaceis, pubescentid parca et pallida ; capite permagno, porrecto, anten-
narum articulis 3 — 10 ampulliformibus ; pronoto subtilissime nee dense punctulato,

COLEOPTERA 537

transverse, lato. lateribus haud fortiter declivis, rotundatis, angulis posticis fortiter
rotundatis ; elytris suboblongis, fortius nee dense punctatis. Long. |— i mm.

Larger than any described species of Nephanes, and than P. blackburni. Dis-
tinguished from all of them by the form of the pronotum ; this is transverse, rather
broad, not sloping steeply at the sides, with the lateral margins rounded, producing
an outline which is strongly curved inwards posteriorly, so that the hind angles are
completely rounded off, and may almost be said to be non-existent.

One specimen differs considerably in appearance ; it is darker, with the abdomen
more elongate, and the elytra appearing narrower posteriorly : it seems probable that
the difference in form is largely due to the abdomen being much less retracted than in
the other specimens. Wings present ; seen in a Canada balsam preparation to have
the scape long and narrow, the membranous portion narrow and lanceolate. Seven
specimens.

Hab. Kauai, Oahu, Hawaii. — Kauai; mts. Waimea, 4000 ft. — Oahu ; near
Honolulu. — Hawaii; Kona, 4000 ft. — (Perkins.)

(3) Ptiliodes pulchellus, sp. no v.

Parum major, laevior, nitidus, niger antennis pedibusque testaceis ; pronoto curto,
fere impunctato, postice magis eo P, insignis angustato, lateribus et angulis posticis
conspicue rotundatis ; elytris fortiter nee dense punctatis, basin versus angustatis.

A single specimen. Some of the difference in appearance between it and P. insignis
may be due to the pubescence in P, pulchellus being largely rubbed off. But it is
clearly distinguished by (i) the form of the pronotum, which is more narrowed posteriorly,
the hind angles being even more rounded off than they are in P, iitsignis] (ii) the curving
in of the lateral outlines of the elytra towards their base; (iii) the larger size, the length
being slightly over i mm. ; (iv) above all, the shining black surface.

Hab. Oahu (Perkins). No particulars of capture.

PriN ELLA, M otschoulsky .
Ptinella Mots., Bull. Mosc. 1845, p. 505 ; Matthews, Trichop. p. 164 and pi. xlx.

(i) Ptinella pacifica Matthews.
Ptinella pacifica Matthews, Cist. Ent. in. 1882, p. 42, and pi. n. fig. 4 ; Trichop.
Sup. p. 20 : Sharp, 1. c.

We have not received this species from Dr Perkins.

Hab. Oahu, under bark in mountain forests (Blackburn).

69 — 2

538 FAUNA HAWAIIENSIS

Trichopteryx, Kirby and Spence.

Trichopteryx Kirby and Spence, Introd. to Ent. in. 1818, p. 40; Matthews,
Trichop. p. 112 and pi. xii.

We have received a single specimen belonging to this genus. Although the elytra
cover the body, yet their short truncated form, and the presence of numerous other
characters, render it almost certain that the abdomen is unnaturally retracted. The
antennae are only moderately long; the head is somewhat deflexed; the pronotum large,
with posterior angles produced ; the mesosternum bears a very definite keel ; the anterior
coxae are in contact; middle coxae close, but not in contact; hind coxae fairly remote,
with a broad rounded lamina all along the outer margin. All these features are charac-
teristic of Trichopteryx, The metasternum between the hind coxae has its angles
slightly produced, acute: but not drawn out so much as to form sharp teeth such as are
found in Actinopteryx,

(i) Trichopteryx, sp. ?

Colour piceous, legs testaceous. Punctures numerous, slightly raised. Pubescence
conspicuous, rather long. Surface alutaceous. Pronotum slightly wider at the base
than the elytra, with hind angles produced.

Hab. Lanai, 2000 ft., l 1894 (Perkins).

Fam. STAPHYLINIDAE.

Tribe PIES T IN L

Thoracophorus, Motsch.

Thoracophortis Motschoulsky, Bull. Mosc. 1837, v. p. 98.

Glyptoma (pars) Erichson, Gen. et spec. Staph, p. 908.

Erichson mixed two very distinct genera under the name of Glyptoma, and it has
therefore been necessary to limit his name to a form not found in Hawaii, and the
Hawaiian genus becomes Thoracophorus.

(1) Thoracophorus blackburni, Sharp.

Glyptoma b lac kburni ShdiV)^, Trans, ent. Soc. London, 1880, p. 53, and Tr. Dublin
Soc. III. 1885, p. 224.

The peculiar sculpture, consisting on the elytra of straight raised lines, is charac-
teristic for this genus. The species varies somewhat in size and in the coarseness of
the sculpture, Unicolorous brown specimens are occasionally met with; the result
probably of immaturity.

COLEOPTERA 539

Hab. Kauai, Oahu, Maui, Molokai, Lanai, Hawaii. Under bark of trees on the
mountains (Blackburn). — Kauai; mts. Waimea, 4000 ft. May 1894, Koholuamano, April
1895, Makaweli, 2500 ft. Feb. 1897 (Perkins).— Oahu; Honolulu end of Koolau range
XII. 1900, Waialua, 2000 ft. iv. 1893, Kawaialoa, 2000 ft. i. 1893, Pipturus, back of
Tantalus xi. 1900, Mokuleiia, v. 1901, Waianae mts. v. 1901.— Maui, Haleakala, 5000
ft. in. and iv. 1894.— Molokai, 3000 ft. vi. and vii. 1893. — Lanai, 2000 and 3000 ft. i.,
II. and VI. 1894. — Hawaii, Kona, 3000 and 4000 ft. viii. and ix. 1892. — (Perkins.)

(2) Thoracophorus brevipennis^ Sharp.
Glyptoma brevipenne Sharp, Trans, ent. Soc. London, 1880, p. 53.

Hab. Oahu, Maui. — Oahu rare, in the mountains (Blackburn), Haleakala 5000ft.
IV. 1894, a single specimen (Perkins).

LispiNus, Er.
Lispinus Erichson, Gen. et Spec. Staph. 1840, p. 828.

(i) Lispinus i7npressicolliSy Motsch.

Lispinus impressicollis Motsch. Bull. Mosc. 1857, i^- P- 495*
Lispinodes quadratus Blackb. Tr. Dublin Soc. ser. 2, in. 1885, p. 125.
This is a widely distributed species and no doubt an adventitious member of
the Hawaiian fauna.

Hab. Oahu. Near Honolulu (Blackburn, Perkins); Waianae mountains, 1700 ft.,
April 1892 (Perkins). — India, &c.

Ancaeus, Fauv.
Ancaeus Fauvel, Bull. Soc. Normand. 1865, p. 60.

(i) Ancaeus laevigatus, Kr.

Lispinus laevigahcs Kraatz, Wiegm. Arch. 1859, i. p. 188.
Lispinodes pallescens Blackburn, Tr. Dublin Soc. in. 1885, p. 126.
The type of this species was examined by M. Fauvel, and I am indebted to him
for the synonymy.

Hab. Oahu, a single specimen under the bark of a tree near Honolulu (Blackburn).
— Ceylon, &c.

Lispinodes, Sharp.
Lispinodes Sharp, Trans, ent. Soc. London, 1880, p. 54.

540 FAUNA HAWAIIENSIS

(i) Lispinodes explicandus, Sharp.

Lispinodes explicandus Sharp, 1. c. p. 53.

This is the most flat of the species and has the eyes better developed than the
congeners. It differs also in the shape of the prothorax, which is less transverse. The
last segment of the abdomen is narrow and conical in some specimens (? the female), in
others it is shorter and broader, with the ventral plate much abbreviated, and furnished
with setae on the hind margin.

Hab. Oahu, Lanai, Hawaii. — Oahu, found rarely under the bark of trees on the
higher mts. (Blackburn). — Lanai, 2000 ft. 1894 (Perkins). — Hawaii, Hualalai, ix. 1900,
one specimen (Perkins). I am not sure that this Hawaiian individual is the same species.

(2) Lispinodes pallidus, sp. nov.

Subdepressus, subglaber, nitidus, fusco-testaceus, parce fortiter punctatus ; prothorace
trans verso, poster! us fortiter coarctato. Long. 2\ mm.

Judging from a single specimen it would appear that Lispinodes pallidus is distin-
guished from most of the other species by the more definite, though scanty and distant,
punctuation of the upper surface. It is larger than Z. explicandus, is considerably less
flattened, and has the prothorax differently shaped. L, kauaiensis is much larger and
is less shining.

Hab. Lanai, 2000 ft., Jan. 1894 (Perkins). One specimen.

(3) Lispinodes oxytelinus, sp. nov.

Subcylindricus, subglaber, nitidus, piceus, obsolete punctatus. Long. 3 mm.

This species has the less depressed, more cylindrical form of the following congener,
from which it is readily distinguished by its longer elytra. The elytra are longer in
proportion to their width than they are in any other species. They are shining and
almost destitute of punctuation. The unique example is, I believe, a female.

Hab. Lanai, Feb. 1894 (Perkins).

(4) Lispinodes molokaiensis, sp. nov.

Augustus, cylindricus, nitidus, subtiliter coriaceus, parcius obsolete punctatus, piceo-
niger, antennarum basi pedibusque rufis; prothorace elytrisque elongatis. Long. 3^ mm.

A little larger and broader than L, oxytelinus and darker in colour; the elytra and
metasternum are elongate. The unique specimen is a male ; the last ventral plate being
concave and hairy, but not to so remarkable an extent as in Z. kauaiensis,

Hab. Molokai, 11. vi. 1893 (Perkins).

COLEOPTERA 54r

(5) Lispinodes kauaiensis^ sp. nov.

Supra subplanatus ; piceo-niger, antennarum basi pedibusque rufis ; minus nitidus,
supra parce, fortiter sed obsolete punctatus, capite thoraceque minus subtiliter coriaceis ;
prothorace transverso, elytris elongatis. Long. 3^ mm.

The unusually distinct, minute, coriaceous sculpture, together with the distant
larger punctures, sufficiently characterise this species. I have four specimens before
me ; they have the last ventral plate peculiar, its surface forming a concavity densely
covered with depressed pallid setae ; all the four specimens are alike in this respect and
may probably be all males.

Hab. Kauai, Koholuamano, 15. iv. 1895 (Perkins).

(6) Lispinodes obsctirus, sp. nov.

Nigricans, parum nitidus, antennarum basi pedibusque rufis, subplanatus, obsolete
punctatus, elytris modice elongatis. Long. 3f mm.

This is apparently nearest to Z. kauaiensis, of which I know only the male ; as we
have only the female of Z. obscurus a knowledge of the male may show the two to be
quite distinct. The chief distinction from Z. kauaiensis consists in the more obsolete
scattered punctuation. From Z. molokaiensis Z. obsacrus is easily distinguished by the
less cylindrical form, and the duller, distinctly coriaceous surface. The unique example
has the last abdominal segment simple, elongate and pointed.

Hab. Molokai, mts. 4500 ft., 23. xii. 1893 (Perkins).

(7) Lispinodes hawaiiensis, sp. nov.

Nigricans, haud depressus, antennarum basi pedibusque rufis; punctis majoribus
sparsis conspicuis ; elytris modice elongatis. Long. i\ mm.

Extremely similar to both Z. kauaiensis and Z. matiiensis. The head and thorax
are not so distinctly coriaceous as in the first of the two, but the impressed punctures
on the thorax are less obsolete, and the elytra are a little shorter. The elytra are
markedly longer than they are in Z. mauiensis and the punctures on the thorax are
more distinct.

The unique example has no remarkable structure at the tip of abdomen. I suppose

it to be a female.

Hab. Hawaii, Hilo under Koa bark 2000 ft. Jan. 1896 (Perkins).

(8) Lispinodes mauiensis^ sp. nov.

Haud planatus, piceus, antennarum basi pedibusque rufis, obsoletius parciusque
punctulatus, sat nitidus; elytris quadratis, ocuHs perparvis. Long. 3^ mm.

We have only one specimen of this species ; the elytra are not quite so short as in

542 FAUNA HAWAIIENSIS

L. crassiventris, but the eyes are very small, each only about as large as the terminal
joint of the antennae. I suppose the individual to be a female as there is nothing
peculiar about the abdomen, the terminal segment being slender conical as in the female
of Z. explicandus. The elytra are as long as they are broad ; the head and thorax are
considerably more distinctly coriaceous than the elytra ; the other punctuation is very
slight,

Hab. Maui, Haleakala, 5000 ft. iv. 1894 (Perkins).

(9) Lispinodes crassus, sp. nov.

Robustus, niger, antennarum basi pedibusque rufis, elytris metasternoque brevibus,
illis transversis. Long. 4 mm.

This is the most robust of the species yet discovered, and has the elytra shorter
comparatively than any other, and it is also the one in which the eyes are most reduced
in size. The abdomen is not at all flattened but is quite cylindrical : the head looks
narrow in comparison with the more robust abdomen ; the antennae are a good deal
thickened towards the tip ; the head, thorax and elytra are very distinctly coriaceous, and
there is very little other sculpture. This species probably cannot fly. Only two speci-
mens have been procured, and they represent the sexes ; the one that I suppose to be
the male has the last ventral plate deeply notched, or emarginate, behind, and flattened
in front of the emargination.

The second individual 1 believe to be a female of the same *^ species, though the
abdomen is more slender than it is in the supposed male : it has the last ventral plate
simple, but the last dorsal has a rather broad longitudinal depression along the middle.

Hab. Maui, Haleakala, 5000 ft. iii. and iv. 1894 (Perkins).

(10) Lispinodes germanus, sp. nov.

Elongatus, piceus, antennarum basi pedibusque rufis ; parcius punctatus ; elytris
subquadratis. Long. 5 mm.

Of this we have only one specimen ; it is longer than L. crassus and the elytra are
not so short. The sex is no doubt the same as that of the individual I have con-
sidered the $ of Z. crassus. The terminal segment is elongate, and is narrow at the
extremity ; the last dorsal plate is slightly impressed on the middle at the tip, and the
last ventral has likewise a depression at the tip.

Hab. Hawaii, Hilo, found on the decaying stem of a tree Lobelia, 2000 ft.
I. 1896 (Perkins).

COLEOPTERA 543

Tribe OXYTELINL
OxYTELUS, Grav.
Oxytelus Gravenhorst, Micr. 1802, p. 10 1.

( I ) Oxytelus ferruginetis, K r.

Oxytelus ferrtigineus Kraatz, Wiegni. Arch. 1859, i. p. 173.
Oxytelus bledioides Blackb., Tr. Dublin Soc. sen 2, ni. p. 125.
M. Fauvel has examined the type of O. bledioides in the British Museum, and has
kindly instructed me as to the synonymy.

Hab. Oahu, Honolulu one specimen (Blackburn). — Ceylon.

(2) Oxytelus advena^ Sharp.
Oxytelus advena Sharp, Trans, ent. Soc. London, 1880, p. 50.

Hab. Kauai, Oahu, Lanai, Molokai. — Kauai, mts. Waimea, 4000 ft. vi. 1894.
Makaweli, 2000 ft. i. 1897 (Perkins). — Oahu; various localities (Blackburn); Pipturus,
back of Tantalus vii. 1900; Kaala mts. 2000 ft. 11. 1892; Waianae mts. iv. 1892
(Perkins). — Lanai, 2000 ft. xii. 1893 (Perkins). — Molokai, Pelekunu, 1893 (Perkins).

(3) Oxytelus pygmaeus, Kr.

Oxytelus pygmaeus Kraatz, Wiegm. Arch. 1859, i. p. 176.

Hab. Oahu, Hawaii. — Oahu, Honolulu in decaying vegetable matter (Black-
burn). — Hawaii, Olaa, 1500 ft. xii. 1896, one specimen (Perkins).

(4) Oxytelus, sp.

Two specimens of a small Oxytelus^ somewhat similar to O. advena but more
shining and with more extensively black abdomen, have been found. They are prob-
ably an introduced species.

Hab. Oahu, Honolulu mts. in summer, Honolulu, 11. 1891 (Perkins).

Trogophloeus, Mannerh.
Trogophloeus Mannerheim, Brach^l. 1830, p. 49.

(i) Trogophloeus senilis, Sharp.

T. senilis Sharp, Trans, ent. Soc. London, 1880, p. 51.

M. Fauvel has suggested to me that this may be T, fulvipes En, but Erichson
gives the length of 7". fulvipes as 1 lin. whereas T. senilis is 3 mm. long. As the
Erichsonian species is a West Indian insect I think it will be better to leave the
F. H. ni. 70

544 FAUNA HAWAIIENSIS

question open till we have more conclusive evidence. When I described the species I
considered it to be an introduced one, and I still entertain this opinion. Indeed as
Trogophloei are very readily distributed by artificial means, and as the three Hawaiian
species are apparently nearly confined to Oahu, I expect they have all been introduced.

Hab. Oahu. On the margins of waters (Blackburn): Wailua, in. 1901, Waianae
coast, I. 1 90 1, mts. 3000 ft. 1892 ; (Perkins).

(2) Trogophloetis fontinalis, Sharp.

T, fontinalis Sharp, Trans, ent Soc. London, 1880, p. 52.

M. Fauvel has suggested that this may be T,' insularis Kr., a species which he
informs me is widely distributed. The type of T, insularis was a Grecian specimen,
and the original description does not accord at all well with T.fontinalis \ so that the
question must remain open. T. fontinalis has not been met with by Perkins and it is
probably rare and local in Oahu.

Hab. Oahu, on the margins of running waters in the mountains (Blackburn).

(3) Trogophloeus abdominalis, Sharp.

T, abdominalis Sharp, 1. c.

M. F'auvel informs me that this species is also found in the Antilles.

Hab. Oahu, Molokai. — Apparendy a coast species.— Oahu (Blackburn and
Perkins). Molokai, sea level, x. 1893 (Perkins).

Tribe PA ED ERIN I.
LiTHocHARis, Lacord.
Litkocharis Lacordaire, Faun. Ent. Paris, 1835, ?• 431-

(i) Litkocharis vilis, Kr.

Lithocharis vilis Kraatz, Arch. f. Naturges. xxv. i. 1859, p. 139.
Lith. ftiscipennis Kr. ?, Sharp, Tr. Dublin Soc. sen 2, iii. 1885, p. 223.
This species has not been found by Dr Perkins. It is a widely distributed form.
The above synonymy I owe to the kindness of M. Fauvel.

Hab. Oahu, Honolulu (Blackburn).

COLEOPTERA 545

Medon, Steph.
Medon Stephens, 111. Brit. Ent. v. 1832, p. 273.

( \ ) Medon debilicornis, WolL

Litkocharis debilicornisV\[o\Va.sion, Cat. Col. Mad. p. 194.

Medon [Hypomedon) debilicornis Ganglbauer, Kafer Mitt. Eur. 11. p. 523.

Hab. Oahu, Molokai. — Oahu, Honolulu (Blackburn). — Molokai, leeward side,
sea-level, x. 1893 (Perkins),

(2) Medon celebensis, Fauv. (i. 1.).

This is a small delicate insect looking like M, debilicornis but considerably narrower.
As I have only one specimen, and the species is foreign to our fauna, I cannot deal
further with it. M. Fauvel informs me that he subsequently found his Z. celebensis to
be a previously described species, but he cannot recall what.

Hab. Oahu, in vegetable refuse, the beach, near Honolulu (Blackburn).

Ophiomedon, Sharp.

Ophio7nedon Sharp, Biol. Centr. Amer. Col. t, pt. 2, p. 567.

When I established the genus Ophiomedon for some South American insects, I
examined the Hawaiian Lithocharis incompta and labelled the type specimen '*an
aberrant Ophiomedon''

(i) Ophiomedon incomptus, Sharp.

Lithocharis incompta Sharp, Tr. Dublin Soc. iii. 1885, p. 124.

Ophiomedon incomptus Sharp, Biol. Centr. Amer. Col. i. pt. 2, p. 567.

This has not been found again since Mr Blackburn's discovery of it. 1 looked on
it as a form imported from the New World, but I cannot point out anything there as
very closely allied. The discovery of a second, allied, form on another island makes
this more doubtful.

Hab. Hawaii, a few specimens in Freycinetia flowers at an elevation of about
4000 ft. on Mauna Loa (Blackburn).

(2) Ophiomedon subtilis, sp. no v.

Subdepressus, dense subtilissime punctatus, baud nitidus, fusco-ferrugineus, antennis
palpis pedibusque rufo-testaceis, elytris versus suturam cumque abdominis segmentorum
marginibus rufescentibus. Long, vix 5 mm.

70 — 2

546 FAUNA HAWAIIENSIS

This insect has much the aspect of a Lithocharis, but the prothoracic side-pieces
are enlarged behind so as to conceal the stigma. The head is subquadrate, the hind
margin straight, not emarginate in the middle. The thorax is nearly as long as broad,
a good deal narrowed behind, very finely and densely punctured, with an extremely fine
channel along the middle. The elytra are densely and finely punctured and are longer
than the thorax. The hind margins of the segments of the abdomen and the tip are
reddish.

The unique example is a male; the front tarsi are a good deal dilated; the last
ventral plate is notched in the middle. This is strongly different from incoinptus by
the longer prothorax.

Hab. Kauai, Makaweli, 2500 ft. 11. 1897 (Perkins).

Nesomedon, gen. nov.

Mandibulae elongatae, bidentatae et unidentatae, palpi maxillares articulo ultimo
fortiter dilatato. Tarsi breves et crassiusculi, anteriores leviter dilatati.

The genus is nearly allied to Medon as exemplified by M, brunneus, but I think
should certainly be separated. The prothoracic epimera are largely developed. The
eyes are very small. The type of the genus and the closely allied N, oahuensis are
apterous, but I have for the present associated a form — N. quadratus — with them, that
is winged. The genus differs from Ophiomedon, by the coarse sculpture, the more
rounded head with smaller eyes, and — in its typical species — by the very short meta-
sternum, and the absence of wings. The left mandible is armed with one sharp tooth,
the right mandible with two,

( 1 ) Nesomedon brunnescens, sp. nov.

Rufo-brunneus, palpis pedibusque testaceis ; capite thoraceque dense fortiter
punctatis, hoc medio tenuiter canaliculato ; elytris brevibus, scabroso-punctatis ; abdomine
pubescente, dense punctato. Long, 4^ — 5 mm.

Plate XVI. fig. 23.

Antennae somewhat infuscate, rather short, 2nd and 3rd joints subequal in length,
9th — nth joints slightly broader, the loth about as long as broad, nth small, oval.
Head subquadrate but with the hind angles much rounded, scarcely broader than the
thorax, coarsely and very densely punctured. Thorax slightly narrowed behind, with
the angles much rounded, less densely punctured than the head, and with a fine channel
along the middle that does not extend to the front. Elytra shorter than the thorax,
contracted at the base, with dense, rough, not coarse sculpture. Wings absent.
Abdomen densely punctate.

The sexual distinctions are slight; in the male the front tarsi are a little broader,
and there is a small emargination of the hind margin of the last ventral plate.

COLEOPTERA

547

The three examples from Kauai agree well, and one, of two specimens, from
Haleakala differs very little from them. Four examples from Molokai are rather more
slender and are darker in colour, so that the elytra are more pallid than the head, thorax
and base of the abdomen. The second example from Haleakala agrees with the
Molokai individuals and I think all are one species.

Hab. Kauai, Molokai, Maui. — Kauai, high plateau, viii. 1896. — Molokai mts.
4500 ft. 21. rx. 1893.— Maui, Haleakala 5000 ft, r. vi. 1894 and in. 1894. — (Perkins).

(2) Nesoinedon oahuensis, sp. n.

Gracilior, piceus, palpis pedibusque testaceis, abdomine rufo-obscuro, segmento
penultimo nigricante; capite thoraceque densius fortius punctatis; elytris angustis,
scabroso-punctatis. Long, vix 4 mm.

We have only one specimen of this insect, but I venture to describe it, as it is
clearly distinct and comes from a different island. It is smaller and much narrower
than N. brunnescens, somewhat differently coloured, and has a more coarsely punctured
thorax. It is a male, and the notch on the last ventral plate is rather more definite than
it is in N, brunnescens,

Hab. Oahu (Perkins).

(3) Nesomedon quadratus, sp. n.

Nigricans, palpis pedibusque testaceo-obscuris, femoribus fuscescentibus; capite
thoraceque dense fortiter punctatis ; elytris parallelis, thorace paulo longioribus. Long,
vix 4 mm.

N. quadrattis is at once distinguished from the other species by the elytra not being
narrowed at the shoulders (PI. XVL fig. 24). The metasternum is longer and the eyes
better developed. It may prove to possess wings. We have one pair only; the male
has a small definite notch on the last ventral plate, like N, oahuensis.

Hab. Hawaii, Olaa, xi. 1896 (Perkins).

Tribe STAPHYLINL
Philonthus, Curtis.
Philonthus Curtis, Brit. Ent. xiii. 1825, 610.

(i) Philonthus scybalarius, Nordm.

Philonthus scybalarius Nordm., Symbol, p. 94.

So far as has been noticed none of the other varieties of this species occur in Hawaii.

Hab. Kauai, Oahu, Maui, Molokai, Lanai (Blackburn and Perkins). Cosmo-
politan.

548 FAUNA HAWAIIENSIS

(2) Philonthtts discoidetcs^ Grav.

Staphylinus discoideus Grav., Micr. p. 38.

Hab. Oahu, Maui, Molokai, Hawaii (Perkins and Blackburn). Widely distributed
outside the islands.

(3) Philonthus nigrituhis, Grav.

Staphylinus nigritulus Grav., Mien p. 41.

Hab. Kauai, Oahu, Maui, Molokai, Lanai, Hawaii (Perkins and Blackburn).
Cosmopolitan.

(4) Philonthus turbidtis, Er.
Philonthus turbidus En, Gen. and Spec. Staph., p. 484.

Hab. Kauai, Oahu, Maui, Molokai, Lanai, Hawaii (Perkins and Blackburn).
Cosmopolitan.

Creophilus, Mann.
Creophilus Mannerheim, Brach., 1830, p. 20.

(i) Creophilus maxillosus, L.
Staphylinus maxillosus L., Faun. suec. no. 891.
Hab. Kauai, Oahu, Maui, Lanai, Hawaii (Blackburn). Widely distributed.

Cafius, Stephens.
Cafius Stephens, 111, Brit. Ent. v. 1832, p. 245.

(i) Cafius nauticus, Fairm.
Philonthus nauticus Fairm., Rev. Zool. 1849, p. 288.
Hab. Maui, coast near Haiku in March (Blackburn). — ^Tahiti (Fairmaire).

Leurocorynus, gen. nov.

Palpi articulo ultimo parvo.

Caput sulcis irregularibus, subobsoletis.

Elytra sutura baud imbricata, singulo linea elevata recta.

The number of genera of Xantholinini with a minute terminal joint to the palpi is
very small, and hitherto all have consisted of insects of small size. Leurocorynus cephalotes
is a comparatively large form and is remarkable in the subfamily on account of the
suture of the elytra. Each wing-case has a strongly elevated line extending from the

COLEOPTERA 549

scutellum to the hind margin: these lines are very nearly contiguous, and if they were
flattened out and more separated .the suture would be imbricate.

The antennae are widely separate, and the grooves behind them are broad and
indefinite, the outer pair especially are indistinct and are very strongly transverse in
direction.

Labrum small, emarginate, the angle on the left side slightly more prominent than
the other angle. Mandibles elongate, the basal part of each with three or four teeth, the
indentation between the basal two teeth filled by a delicate membrane. Terminal joint
of labial and of maxillary palpi very short and slender compared with the others.
Middle coxae very distant, the mesosternum with rather blunt termination between
them.

(i) Leurocorynus cephalotes, sp. nov.

Niger, subdepressus, palpis pedibusque interdum rufescentibus; nitidus, elytris
subopacis; capite fortiter irregulariter punctato, thorace punctis perpaucis irregulariter
notato, elytris punctis sat numerosis plus minusve obsoletis. Long. 1 1 — 25 mm.

Plate XVI. fig. 22.

Extremely variable in size; and the larger specimens have usually more punctuation
on the head, while that on the elytra is more effaced. In correlation with the difference
of size there are distinctions in the shape of the specimens, the smallest individuals being
nearly parallel, while the largest have the abdomen very broad, the lateral margins being
remarkably wide. The species seems most at home in the island of Kauai, and it is
there that the largest examples occur. I have not noticed any sexual distinctions.

Hab. Kauai, Molokai, Lanai, Hawaii. — Kauai, 4000 ft. vi. 1894; mts. Waimea,
4000 ft. V. 1894; Koholuamano, 4000 ft. iv. 1895. — Maui, Haleakala, 4500 ft. iv. 1894.
— Molokai, 4000 ft. 27. v. 1893. — Lanai, 3000 ft. vi. 1894, 2000 ft. i. 1894. — Hawaii,
Hualalai, ix. 1900. — (Perkins.)

Xanthocorynus, gen, nov.

Palpi articulo ultimo parvo.

Caput sulcis, praesertim intermediis, subobsoletis.

Pronotum seriebus dorsalibus punctorum.

Elytra sutura haud imbricata, singulo linea elevata sat discreta.

The insect for which I establish this genus has entirely the facies of the more feeble
exponents of the genus Xantholinus, so that 1 was very much surprised when I found
that it was quite distinct from that genus and that it is really closely allied to the other
two Hawaiian forms of the subfamily Xantholinini.

It differs from Leurocorynus by so many minor points that I think in the Hawaiian
fauna it should be treated as a distinct genus, though the discovery of an intermediate
form may cause it to be merged in Leurocorynus, It is of narrow form, not flattened,

550 FAUNA HAWAIIENSIS

and has two complete series of dorsal punctures on the thorax ; the median grooves on
the side of the head are obsolete, and the peculiar lines along the suture of the elytra are
not so well developed.

The genus may be placed next to Leptacimis, from which it is well distinguished by
the suture of the elytra and the longer palpi.

(i) Xanthocorynus deceptor^ sp. nov.

Augustus, nitidus, picescens, antennis, mandibulis, palpis pedibusque rufis, abdomine
apice et basi plus minusve rufescente. Long. 7^ mm.

Plate XVI. fig. 21.

The colour is predominantly dark, but looks as if this were a reddish insect strongly
tinged with black, the thorax being almost quite black, while the legs are quite pale.
The head is only obsoletely and sparingly punctured, punctures being quite absent all
along the middle. The long and narrow pronotum has on each side of the middle a
dorsal series of about ten punctures, and outside this a few other punctures irregularly
placed ; the punctures are subobsolete. The elytra are about as long as the thorax,
rather sparingly punctured. Three specimens.

Hab. Kauai, mts. Waimea, 4000 ft. v. 1894 (Perkins).

HoLOcoRYNUS, gen. nov.

Palpi articulo ultimo parvo.

Elytra sutura baud imbricata.

Caput antice 4 -sulcatum.

Pedes intermedii subapproximati mesosterno inter eos elongato-acuminato.

At the time I described Pachycorynus discedens I remarked that it was really a
distinct genus. The discovery of allied, but generically distinct, forms, makes it desirable
to give this form due generic rank. There can be no doubt that it is closely allied to
LeMrocorynus, from which Holocorynus differs by the definite frontal grooves, the more
approximate middle coxae and the absence of the raised margins along the suture of the
elytra.

(i) Holocorynus discedens^ Sharp.

Pachycorynus discedens Sharp, Tr. ent. Soc. London, 1880, p. 50.

In this species the penultimate joints of the antennae, and the impressed punctures
on the head and thorax, are large and remarkably definite. It has not been found by
Dr Perkins.

Hab. Oahu, under bark in the forest (Blackburn).

COLEOPTERA 551

(2) Holocorynus subdepressus, sp. nov.

Depressus, capite thoraceque piceis, parce punctatis, antennis palpis pedibusque
testaceis, elytris testaceo-obscuris subtiliter punctatis, abdomine nigricante aplce ferru-
gineo ; antennis articulis 5 — 10 fortiter transversis. Long. 5 mm.

This is much smaller than H\ discedens, and is readily distinguished by the much
shorter antennae ; it is less depressed and the punctuation of the surface is finer.

Hab. Kauai, Makaweli, 2500 ft., 11. 1897. Three specimens (Perkins).

Leptacinus, Er.
Leptacinus Erichson, Kaf. Mark Brand, i. 1837, p. 429.

( I ) Leptacmus Jiavipennis^ Kr.
This has not been met with recently and is no doubt an introduced form.
Hab. Oahu, Honolulu (Blackburn).

Tribe ALEOCHARINL
Myllaena, Er.

Myllaena Erichson, Kaf. Mark Brand, i. 1837, p. 382.

About 12 species of this genus have been obtained in Hawaii, and doubtless
others exist there. Although they are small and obscure insects they really form a
remarkable element in the Hawaiian fauna. The Munich Catalogue of Coleoptera
enumerates only 18 species for all the world, and this number has not since been greatly
added to. The species are a most difficult study, for forms found in widely separated
parts of the world are extremely similar and the discrimination of the species is usually
a matter of much difficulty. I regret that I am obliged to leave the Hawaiian Myllaenas
in an unsatisfactory state, the material at my disposal being inadequate as regards both
number of specimens and their mode of preservation. The species may possibly be
ultimately satisfactorily precised by means of the male genitalia, which are of a
remarkable character. But I am not able to make use of this structure at present.

(i) Myllaena discedens, Sharp.

Myllaena discedens Sharp, Tr. ent. Soc. London, 1880, p. 49.

This very remarkable Myllaena has not been met with recently; and is no doubt
both local and rare. I believe that it is an apterous form and entitled to generic rank.

Hab. Oahu, in fallen logs on the hills a few miles from Honolulu (Blackburn).

(2) Myllaena, sp. ?

A single individual from Haleakala, has very short elytra and approximates a good
deal to M. discedens. It is very close to M. rufescens but has more slender antennae
and will probably prove to be a different species.

Hab. Maui; Haleakala, 5000 ft., x. 1896 (Perkins).

F. H. III. 71

552 FAUNA HAWAIIENSIS

(3) ' Myllaena rufescens, sp. no v.

Rufa, capite abdominisque medio plus minus infuscatis ; antennis minus gracilibus,
apicem versus subincrassatis ; elytris thorace brevioribus. Long. 2\ mm.

This is longer than M. curtipes, and paler in colour ; and I have no doubt as to its
being distinct although the small series before me is in very bad preservation. The
wings are short, and quite useless for flight.

Hab. Kauai. Mts. above Waimea, v. 1894; high plateau, viii. 1896; Kauai,
4000 ft. VII. 1896; (Perkins).

(4) Myllaena haleakalae, sp. no v.

Angusta, fusco-rufa, antennis palpis pedibusque rufis, antennis minus gracilibus,
apicem versus subincrassatis, elytris thorace brevioribus. Long. 2^ mm.

This is comparatively narrower than M, rufescens and is darker in colour, and I
think will prove distinct though we have only two specimens.

There is also a single specimen from Molokai of a very similar insect, but it is too
much mutilated to form an opinion about; high forest, Molokai, 1893 (Perkins).

Hab. Maui. Haleakala, nearly 10,000 ft. iv. 1894; Haleakala, 5000 ft. ix. 1896.
— .'^ Molokai (Perkins as above),

(5) Myllaena curtipes, Sharp.

Myllaena curtipes Sharp, Tr. ent. Soc. London, 1880, p. 49.

A very tiny species, with comparatively short and stout antennae and legs, and the
elytra just perceptibly shorter than the thorax. The colour is fuscous, smoky blackish-
red. Dr Perkins has only found two examples.

Hab. Oahu. Konahuanui, 3000 ft. (Blackburn): Wailua, iv. 1901 ; Honolulu
mountains, VI. 1900; (Perkins).

(6) Myllaena vicina, Sharp.

Myllaena vicina Sharp, Tr. ent. Soc. London, 1880, p. 48.

This species has the antennae more slender and less thickened at the tip than any
other of the Hawaiian forms, the penultimate joint considerably longer than broad.
The colour is red, much infuscate. The species has ample wings : the elytra are just
slightly longer than the thorax.

Hab. Kauai, Oahu, Molokai, Maui.— Kauai : high plateau, viii. 1896; mts.
Waimea, 4000 ft. VI. 1894. — Oahu: Honolulu mts. ix. 1896; Palolo, vii. 1900; back
of Tantalus, vi. 1901 ; Kaala mts. 2000 ft. iii. 1893 J Waialua, in. 1901 ; Waimea water-
shed, IV. 1891. — Molokai : 11. vi. 1893 ; Pelekunu, high forest, no date; Molokai mts.
4000 ft. VI. 1896.— (Perkins.)— Maui (probably Wailuku valley, Blackburn); West Maui,
Jao valley, iii. 1894 (Perkins).

COLEOPTERA 553

(7) Myllaena familiaris, Sharp.
Myllaena familiaris Sharp, Tr. ent. Soc. London, 1880, p. 48.
The darkest in colour of the Hawaiian forms, the legs and palpi being much
infuscate.

Hab. Oahu. Not rare in the mountain forests around Honolulu (Blackburn):
Waimea mts. 2000—3000 ft. ir. 1896; mts. near Honolulu, 2000—3000 ft.; back of
Tantalus, viii. 1900; back of Malukia on Freycinetia, xii. 1900; (Perkins).

(8) Myllaena cognata, sp. nov.

Nigra, subtilissime punctata, antennis palpis pedibusque nigro-rufis. Long. 3 mm.

This is extremely close to M. familiaris but is considerably larger : its smallest
individuals when compared with M, familiaris are broader and less shining. We have
received a considerable series, but the specimens are very badly preserved.

Hab. Hawaii : Hilo on decaying stem of tree Lobelia, 2000 ft. i. 1906 ; Hilo 11.
1897 ; above Hilo, 1800 ft. xir. 1895 ; Kaumana, Hilo, 2000 ft. i. 1896 ; (Perkins).

(9) Myllaena pacifica, Blackburn.
Myllaena pacifica Blackburn, Tr. Dublin Soc. sen 2, in. p. 121.
I am not able to form an opinion as to whether this is M. cognata.

Hab. Hawaii, a single specimen taken on a flower of Freycinetia on Mauna Loa,
4000 ft. (Blackburn).

(10) Myllaena oxypodina, sp. nov.

Minuta, fusca, antennis, palpis pedibusque pallide testaceis, pube omnium subtilis-
sima vestita, elytris thoracis longitudine. Long, if mm.

This minute and delicate insect is represented only by a single example: I give it a
name as it is quite distinct from anything else. The antennae are distinctly thickened
towards the apex, the penultinate joint as long as broad. The base of the thorax is
rounded rather than bisinuate ; the elytra are slightly longer than the thorax ; the
punctuation is excessively fine ; the extremely minute pubescence gives the upper surface
a well-marked shimmer. The legs are rather short and stout.

Hab. Oahu, Honolulu, 2. vii. 1901 (Perkins).

(11) Myllaena apetina, sp. nov.
Brevis, crassiuscula, capite, thorace pedibusque rufo-testaceis, elytris, pectore
abdomineque nigricantibus, antennis sordide rufis : elytris perbrevibus. Long, corporis
contract! i^ mm.

Of this very remarkable species we have only one specimen and that in bad preser-
vation, but it is not possible to confuse it with any other Myllaena ; there is indeed no

71—2

554 FAUNA HAWAIIENSIS

doubt that it will form a distinct genus. The fine down characteristic of the genus is
wanting in M. apetina, the head and thorax being somewhat shining, and the abdomen
hirsute. The antennae and legs are not so slender as they are in other species of the
genus ; and the extremely short elytra are also very remarkable. The antennae are not
very slender, and are dull red in colour, they are slightly thickened towards the apex,
the penultimate joint is not quite so long as broad, and the terminal joint is only a little
longer than the loth. The elytra are at the suture much shorter than the thorax ; at
the sides, though longer, they are nevertheless shorter than the thorax. Though
wingless this species has no relations with the other wingless forms.

Hab. Hawaii? **Vor'[canoJ viii. 1896 (Perkins).

Oligota, Mannerheim.

Oligota Mannerheim, Brach. 1830, p. 72.

The small tribe Oligotini — of which Oligota and Liophaena are the Hawaiian
representatives — contained in the Munich Catalogue of the year 1868, 23 species, nearly
all from the Palaearctic region, and placed in the single genus Oligota, The Central
European region is, so far as we can judge at present, the metropolis of the group. In
Ganglbauers recent work ** Kafer Mitteleuropas" 10 species are registered and all are
placed in Oligota, with its two subgenera Holobus and Oligota proper. In the Hawaiian
group of islands about 30 species have already been brought to light and they exhibit a
most remarkable network of precinctive forms.

I regret extremely that I am not in a position to give a satisfactory analysis of this
truly remarkable insular group. Oligotini are amongst the smallest of the Staphylinidae,
a creature 2mm. long would be a giant in the tribe: they also lose their natural shape
when dried, and are very difficult to restore. To the collector they appear very much
alike, and therefore they have not been adequately collected.

Our Hawaiian forms should no doubt form four or five genera, but I am not able to
precisely define them, so that after separating the genus Liophaena with three species, I
place the other Hawaiian forms under the genus Oligota, and adopt five subgenera as
follows.

Elytra very short, not longer than the thorax; form slender Deroligota subg. n.

Elytra longer than the thorax ; —

Mandibles very long and slender Gnatholigota subg. n.

Mandibles normal : —

Antennae slender, abdomen rounded at the sides Nesoligota '&\>\yg, n.

Antennae very thick, abdomen narrowed from base to tip Holobus Solier.

Abdomen subparallel (except at last segments) Oligota s. str.

COLEOPTERA 555

Oligota, Deroligota subg. nov.
Metasternum short; middle coxae only moderately distant, breast between them
without transverse suture. Elytra not longer than the pronotum. Form slender.
This is probably an apterous form.

(i) Oligota [Deroligota) p7'olixa, Sharp.

Oligota prolixa Sharp, Tn Dublin Soc. sen 2, in. p. 220,

This is distinguished from all the other Oligotinae by the very short elytra.

The short series before me comes from three or four islands and exhibits a good
deal of variation, so that I think there may prove to be more than one species of
Deroligota.

The island my original type came from is somewhat uncertain. Mr Blackburn
mentioned Maui and Hawaii as the homes of the species. When he sent me the
specimen I described he did not tell me which island it came from. It does not agree
with the other individuals before me, except with one specimen from the island of Lanai.
These two individuals are darker in colour and have the elytra rather longer than the
examples from Oahu and Kauai.

Without a larger series of specimens I cannot decide as to the treatment of these
forms as more than one species. The species appears to be rare; usually only one
specimen has been found at a time.

Hab. Kauai, Oahu, Maui, Lanai, Hawaii. — Kauai: 4000ft. vi. 1894; Koholuamano,
19. VI. 1895 (Perkins). — Oahu: Waianae mts. 2000 — 3000 ft. 11. 1896; Mokuleila, v.
1901; Konahuanui ridge, xii. 1900; Pipturus, back of Tantalus, xi. 1900 and xii. 1900 ;
Wahiawa, IV. 1901 ; (Perkins). — Maui (Blackburn). — Lanai, 2000 ft. i. 1894 (Perkins). —
Hawaii (Blackburn).

Oligota, subg. Holobus Solier.
(2) Oligota {Holobus) clavicornis, Sharp.

Oligota clavicornis Sharp, Tr. ent. Soc. London, 1880, p. 44.

Distinguished abruptly from all the other species, by the short convex form and by
the abdomen narrowed from base to apex and by the terminal half of the abdomen being
bright yellow.

In addition to my original type I have seen but one other example; and even this
I think will ultimately prove to be another species, as the club of the antenna is not so
broad, and the 6th joint not transverse.

Mr Blackburn's example was found in straw imported from England, and that had
lain for two years in Honolulu. Dr Perkins' example was found twenty years sub-
sequently, in July 1900. So that it would appear that this subgenus is now constantly

556 FAUNA HAWAIIENSIS

present in the islands. It is however very different from any of the other Hawaiian
forms.

Hab. Oahu. Honolulu (Blackburn); and, as var. ?, Pipturus, back of Tantalus,
vii. 1900 (Perkins).

Oligota, Gnatholigota subg. nov.

This subgenus is well distinguished by the remarkable mandibles (PI. XVI. fig. 18).
It is most difficult to extend these parts after the specimen has been dried, and I am not
at all sure that the other species I have placed in the subgenus agree with (9. latifrons
in this respect. They are all apparently very rare insects.

(3) Oligota {Gnatholigota) latifrons^ sp. nov.

Lata, brevis, nigra, nitida, pube minus obsolete parce vestita, antennis palpis
pedibusque testaceis. Long, if mm.

Very short, and the broadest of all the Nesoligota division; very like O. glabra but
at once to be distinguished by the much greater development of the pubescence, which
although fine and scanty is conspicuous and beautifully regular.

The species should probably be a distinct genus, the structure of the mandibles
being very peculiar (PL XVI. fig. 18) and their relation to the epistome remarkable.
Six specimens.

Hab. Kauai, Halemanu, v. 1895 (Perkins).

(4) Oligota [Gnatholigota ?) brevicollis, sp. nov.

Nigricans, antennis palpis pedibusque fusco-rufis; pube suberecta sat dense vestita;
thorace obsolete parciusque punctato, brevissimo ; antennis articulis 8° et 9° latissimis,
f fortiter transverso. Long, i^ mm.

The 4th and 5th joints of the antennae are bead-like, slightly broader than long,
6th broader transverse, the club very broad. Though much smaller than O. latifrons^
this species has a similar facies. Three specimens.

Hab. Oahu, Pipturus, back of Tantalus, vil 1900 (Perkins).

(5) Oligota {Gnatholigota) anomalocera, sp, nov.

Picea, pube delicata sat dense vestita, antennarum basi pedibusque testaceis;
antennarum clava fusca, magna, et crassa et elongata. Long, i^ mm.

Closely allied to O, brevicollis, but readily distinguished by the very remarkable
antennae, the club of which is longer and more definite than in (9. brevicollis. The

COLEOPTERA 557

pubescence and sculpture are not so slight as in brevicollis, and the surface is therefore
less shining. One specimen.

Hab. Kauai, mts. Waimea, 4000 ft. vi. 1894 (Perkins).

(6) Oligota {Gnatholigota}) parca, sp. nov.

Sat lata, nigricans, antennis palpis pedibusque testaceis; pube suberecta vestita,
fortiter parce punctato; antennis minus abrupte clavatis. Long. 1^ mm.

This differs from O. brevicollis by its narrower form, and by the different shape of
the antennae, the 3rd, 4th, 5th and 6th joints being not transverse, the 7th slightly
transverse, and the 8th moderately so. One specimen.

Hab. Molokai, high forest (Perkins).

(7) Oligota (Gnatholigota'i) extranea, sp. nov.

Sat elongata, subparallela, baud nitida, fortiter punctata, longius sed baud dense
pubescens, picea, antennis palpis pedibusque testaceis, illis clava fere abrupte quadri-
articulata. Long. i\ mm.

This is a very peculiar species, not likely to be confounded with any other ; the last
joint of the palpus is elongate, very slender and quite parallel, and contrasts strongly with
the penultimate joint which is rather broader than usual in the Hawaiian species: the
head is not pointed in front, and is coarsely punctured. The thorax is very short, and
narrowed towards the base, rather than towards the front ; the elytra are longer than the
thorax, the abdomen elongate and narrow, slightly but distinctly narrower in front,
though not at all rounded at the sides. The legs rather stout. Five specimens.

I am not at all clear as to ihe relation of this form to the other Hawaiian Oligotinae.
The middle coxae are less widely separated than usual, the intercoxal suture between
them very strongly marked. The mandibles are I believe longer than normal, though
not so peculiar as in O. latifrons. On the whole I think it best placed at present in the
subgenus Gnatholigota,

Hab. Molokai, highest mountains, ix. 1893 (Perkins).

Oligota, Nesoligota subg. nov.

The species of this genus have polished integuments, and but little sculpture on the
abdomen; these characters distinguish the species from Oligota, s. str., and Holobiu,
From Gnatholigota the quite different shape of the head is sufficiently distinctive,
without reference to the mandibles. The head is only about half as broad as the elytra,
and looks somewhat acuminate in front. The '' rounding " of the abdomen at the sides
arises from the fact that the extreme basal segments are distinctly narrower than those
that are antepenultimate.

558 FAUNA HAWAIIENSIS

(8) Oligota {Nesoligotd) latipennis, sp. no v.

Perbrevis, lata, brunnea, antennis, palpis pedibusque flavis; capite, thorace elytrisque
crebrius profunde fortiter punctatis; antennis sat elongatis, articulis nullis transversis.
Long. \\ mm.

We have only one individual of this remarkable species: but it will be very readily
distinguished by the uniform coarse sculpture of the anterior parts. The hairs are very
scanty, and the abdomen is destitute of sculpture.

Hab. Hawaii, Olaa, xii. 1896 (Perkins).

(9) Oligota [Nesoligota) polita, Sharp.

Oligota polita Sharp, Tr. ent Soc. London, 1880, p. 45 [nee O. polita Sharp, Biol
Centr. Amer. Col. i. pt. 2, p. 293, 1883].

Very closely allied to O. glabra but slightly smaller, and with rather shorter
antennae, specially joints 4 — 6. There is no distinct suture across the breast between
the middle coxae.

We have a small series of this species from Oahu ; and I have also referred to it
with doubt a few specimens from Kauai; these do not quite agree in minor details; they
exhibit a distinct suture between the middle coxae.

Two or three specimens are entirely pale reddish-yellow, and have the pectoral
suture distinct. It is possible that these may be another species.

It will be seen from the above remarks that I have not treated the presence or
absence of a suture on the isthmus between the middle coxae as of importance in this
species. This character is however considered as so important in many Aleocharini that
genera are founded on it. I may possibly be mistaken in my study of the Hawaiian
forms; but as I have found specimens possessing the suture, and others without it, and
could find no other distinction, I have been constrained to disregard this character.

Hab. Kauai. Oahu. — Kauai; Koholuamano, 1500 — 4000 ft. iv. 1895; high
plateau, viii. 1896; Makaweli, 2500 ft. 11. 1897; (Perkins). — Oahu; generally on flowers
of Freycinetia (Blackburn); Waianae mts. 2000 — 3000 ft. 11. 1896; Honolulu mts.
2000 ft. 27. x. 1892; Waialua coast, ix. 1900; Konahuanui ridge, xi. 1900; back of
Tantalus, viii. 1900, and xii. 1900; back of Maluhia on flowers of Freycinetia, xii.
1900; (Perkins).

(10) Oligota {^, Nesoligota) kauaiensis, Blackb.

Oligota kauaiensis Blackburn, Tr. Bublin Soc. iii. p. 122.

I anticipate that this may prove to be a Kauai form of O. glabra or a closely allied
species. *

Hab. Kauai, Waialeale, August, one specimen by beating dead branches 2000 ft.
(Blackburn),

COLEOPTERA 559

(11) Oligota \Nesoligota) cribripennis, sp nov.

Lata, brevis, fere glabra, nigricans, antennis pedibusque testaceis, elytris piceis
profunde remote punctatis. Long, \ mm.

A very broad, compact little insect ; closely allied to O, glabra, but comparatively
broader, and distinguished by the more definite punctures on the elytra. The surface
is almost destitute of pubescence. Four specimens.

Hab. Kauai, Halemanu, 4000 ft. v. 1895 (Perkins).

(12) Oligota {Nesoligota) cttr^^ax, sp. nov.

Lata, subglabra, nigra, antennis palpis pedibusque testaceis, femoribus fuscis ; pube
rara sed minus minuta vestita; elytris parcius fortiter punctatis. Long. i-| mm.

This is very closely allied to O, glabra] slightly larger, with the sculpture and
pubescence more distinct, and the legs a little longer. Though we have only one
example I have little doubt as to its being distinct.

Hab. Hawaii, Olaa, xi. and xii. 1896 (Perkins).

(13) Oligota {Nesoligota) glabra, Sharp.

Oligota glabi^a Sharp, Tr. ent. Soc. London, 1880, p. 46.
' This is the most robust of the Hawaiian allied forms. In the mature state the
colour is black, the antennae and legs yellow, but the latter always more or less in-
fuscate, sometimes strongly infuscate; the club of the antenna may sometimes be slightly
obscured in colour, especially at the tip. The sculpture is peculiar, consisting of a few
large distant, shallow punctures, on the anterior parts only ; the abdomen is destitute of
punctuation, but its surface is finely coriaceous. The pubescence is excessively slight, so
that it does not affect the shiningness of the surface, which however is much diminished
by the minute coriaceous sculpture.

The specimens above described occur on several islands, but they exhibit consider-
able variation, so that it is probable that there may prove to be more than one species.
The" most remarkable point in the variation is in the suture between meso- and meta-
sternum, which is sometimes obliterated and sometimes strongly developed. In the
type specimen it is absent. Cf. no. 8—0. polita — as to this point.

Hab. Maui, Molokai, Lanai, Hawaii. — Maui, 5000 ft, iii. and iv. 1894. — Molokai,
4000 — 5000 ft. VII. and IX. 1893. — Lanai, 2000 ft., i. 1894 ^^d vii. 1894 (Perkins). —
Hawaii: various localities not lower than 3000 ft., dry dead wood (Blackburn) : Kona,
3000 ft. IX. 1892; Kilauea, vi. and vii. 1895 ^^d viii. and x. 1896; Hilo, 1800 ft. xii.
1895 and 2000 ft. I. 1896; (Perkins).

F. H. III. 72

56o FAUNA HAWAIIENSIS

(14) Oligota {Nesoligota) bicolor, sp. no v.

Nitida, parcissime subtilissime pubescens fere glabra, capite thoraceque rufes-
centibus, abdomine elytrisque nigris, an tennis pedibusque dilute flavis. Long, i-^ mm.

Closely allied to 6>. polita, but readily distinguished by the bright coloration, and
its more slender form. There is no elevated carina between the middle coxae. Five
specimens.

Hab. Oahu. Konahuanui Ridge, xi. 1900; back of Tantalus, xii, 1900; (Perkins).

Oligota, s. str.

The species, 14 — 19, placed here at the head of Oligota s. str. are quite aberrant,
and should probably be separated. From O, mutanda on to the end of the genus, the
species are more like the European forms, and may possibly prove really congeneric
therewith.

(15) Oligota scripta, sp. no v.

Nigerrima, nitida, parce punctata et pubescens, pedibus sordide testaceis, antennis
flavis. Long. i-| mm.

This species is remarkable by the highly developed minute sculpture of scratches,
which it exhibits on the head, thorax, and elytra, in addition to the remote and distant
strong punctures ; this fine sculpture forms a dense minute network. On the abdomen
this sculpture is less close and less definite : at the base of the second and third segments
of this part there are a number of raised longitudinal plicae in the transverse basal
depression. The antennae are moderately long, very pale yellow, the terminal joint
slightly infuscate, the 7th joint not transverse, the 8th and 9th not strongly transverse.

This is one of the most obscure and difficult of the species, and careful collection
and observation, with field notes, are requisite before the question of specific identity
can be settled. It is possible that there may be difference in the sexes, but as there are
no external characters at present known by which the sexes can be discriminated, this
point must also stand over.

Hab. Kauai, Maui, Hawaii. — Kauai, Koholuamano ; Kauai, 4000 ft. x. 1895 J high
plateau, 8. ix. 1896 (Perkins). — Maui, Haleakala, 5000 ft. x. 1896. — Hawaii; Kilauea.
viL 1896 and VIII. 1896 (Perkins).

Oligota scripta, var. laetior, van nov.

The specimens of (9. scripta from Kauai and Kilauea in Hawaii agree fairly well,
but a short series from Hualalai in Hawaii can be distinguished by the more polished
surface, the finer minute reticulate sculpture and the more effaced and scanty larger
punctures of the prothorax. They are however so very similar to what I have considered
the typical form that I think it best to treat them at present merely as a variety ; one of

COLEOPTERA 561

them has the clypeus picescent This individual makes some approximation to O.
frontalis. One of the specimens is smaller, has the legs darker, and the punctuation
of the elytra more distinct. It is doubtful whether it may not be another species.
Hab. Hawaii ; Hualalai, 5000 ft. 5. viii. 1892 and ix. 1900 (Perkins).

(16) Oligota frontalis y sp. no v.

Nigerrima, nitida, capite testaceo vertice fusco, pedibus fusco-testaceis, an tennis
flavis. Long, i^ mm.

Closely allied to (9. scripta, but with finer sculpture and readily distinguished by
the yellow head ; the antennae are short, even the 7th joint being distinctly transverse.
Two specimens.

A third specimen, from back of Tantalus, is entirely brownish yellow, with the front
of the head paler. It may be another species, or it may be an immature variety.

Hab. Oahu. Waianae mts. 2000—3000 ft 11. 1896; and var. ?, back of Tantalus,
VII. 1900 (Perkins).

(17) Oligota adpropinquans, sp. nov.

Nigerrima, nitida, minuta, parce punctata, pedibus vix fusco-testaceis, an tennis
palpisque flavis. Long, i^ mm.

I separate a single individual from O. insolita on account of its narrower more
parallel form. I see no other distinction of importance.

Hab. Oahu, Waianae mts. 2000 — 3000 ft. 11. 1896 (Perkins).

(18) Oligota insolita^ sp. nov.

Nigerrima, nitida, minuta, brevis, minus angusta, parce punctata, pedibus fusco-
testaceis, antennis palpisque flavis. Long. i\ mm.

This tiny insect, though closely allied to O. frontalis, is doubtless quite distinct.
It has the head black, and is of shorter and broader form. The 8th joint of the antenna
is decidedly but not strongly transverse. Two specimens.

Hab. Kauai, Makaweli, 2500 ft. 11. 1897 (Perkins).

(19) Oligota gymnusay sp. nov.

Nigra, subopaca, minus parce punctata, longius pubescens, antennis flavis. Long,
i-^ mm.

This, though looking very distinct from O. scripta, is really closely allied ; it is of
much broader form, and the sculpture is much denser, which gives it a dull appearance.
The elytra are rather longer than usual, and the tarsi short. The 8th and gth joints of
the antennae strongly transverse.

Hab. Lanai, 2000 ft. i. 1894 (Perkins). ,

72—2

562 FAUNA HAWAHENSIS

(20) Oligota simulans, Blackb.

Oligota simulans Blackburn, Tr. Dublin Soc. sen 2, iii. p. 123.
I think this species is certainly near to O, gymnusa, though it comes from a
different island.

Hab. Kauai, Waialeale. A single specimen by beating branches of trees, 2000 ft.
(Blackburn).

(21) Oligota mutanda^ Sharp.

Oligota mutanda Sharp, Tr. ent. Soc. London, 1880, p. 46.

This insect is narrow, and is of very dark colour; there is usually a very faint
metallic reflection from the upper surface; the punctuation is scanty but rather coarse
and rough. The legs are always very dark, sometimes quite black, and they are
slender. The antennae are yellow, but they are slightly darker at the tip, sometimes
strongly so. I see no distinct indication of a suture on the breast between the coxae.
Nine specimens. There is also one from Maui that seems quite the same.

Hab. Hawaii, Maui. — Hawaii, Mauna Loa, 4000 ft. (Blackburn): Kilauea, viii.
1895, vriL 1896, IX. 1896, and also x. 1896; Kona, 5000 ft. 30. vi. 1892 ; (Perkins). —
Maui, 5000 ft. X. 1896 (Perkins).

(22) Oligota oahuensis, sp. no v.

Augusta, fusca, antennis pedibusque testaceis, illis brevibus, subtiliter crebre
punctata, brevissime pubescens. Long, i^ mm.

Closely allied to O. mutanda, rather smaller and paler in colour, with finer punctua-
tion and pubescence, and rather shorter antennae, the 4th joint of which is not longer
than broad. Seven examples from Oahu and one from Lanai agree satisfactorily ; the
five individuals from Kauai are darker in colour, but may well be the same species.

Hab. Kauai i^, Oahu, Lanai. — Kauai, mts. Waimea, 4000 ft. vi. 1894. — Oahu, back
of Tantalus, VIII. 1900; Konahuanui Ridge, xii. 1900. — Lanai, 2000 ft. 1894. (Perkins.)

(23) Oligota haleakalae, sp. nov.

Augusta, fusca, antennis pedibusque testaceis, illis sat elongatis ; crebre subtiliter
punctata, brevissime pubescens. Long, fere 2 mm.

This is extremely closely allied to O. oahuensis but distinctly larger, and with more
elongate antennae. One specimen.

Hab. Maui, 5000 ft. v. 1896 (Perkins).

COLEOPTERA 563

(24) Oligota tenuicornis, sp. no v.

Minus angusta, nigricans, nitida, antennis palpis pedibusque testaceis, crebre
subtiliter punctata et pubescens, antennis gracilibus. Long, if mm.

Closely allied to O, oahuensis but broader, and with much more slender antennae,
the 7th joint being not broader than long, and the 8th and 9th only feebly transverse,
whereas in O. oahuensis all three are strongly transverse. The metallic reflection
present on O. oahuensis and mutanda is not seen in this species. One specimen.

Hab. Hawaii, Kilauea, vii. 1895 (Perkins).

(25) Oligota aethiops, sp. nov.

Angusta, nigerrima, antennis flavis, pedibus fuscis, capite thoraceque obsolete
parce punctatis, subtilissime pubescentibus, abdomine minus obsolete punctato, subtiliter
pubescente. Long. i-| mm. One specimen.

Hab. Hawaii, Kilauea, viii. 1895 (Perkins).

(26) Oligota pernigra, sp. nov.

Minus angusta, nigerrima, nitida, antennis flavis, pedibus fuscis, parce subtiliter
punctata et pubescens. Long, i^ mm.

This is a broader insect than O. aethiops, and more shining ; the thorax is broader
than the abdomen which is not the case with O. aethiops. It also greatly resembles
O. mutanda, but is of an intense black colour without metallic reflection, and is con-
siderably smaller. One specimen.

Hab. Lanai, 3000 ft. i. 1894 (Perkins).

(27) Oligota longipennis, Blackburn.

Oligota longipennis Blackburn, Tr. Dublin Soc. sen 2, iii. p. 123.

I conclude from Mr Blackburn's brief description, that his 0. longipennis is allied
to O. oahuensisy but the coloration he gives does not apply satisfactorily to any member
of this group.

Hab. Oahu, a single specimen (Blackburn).

(28) Oligota variegata, Blackburn.

Oligota variegata Blackburn, Tr. Dublin Soc. ser. 2, iii. p. 124.

M. A. Fauvel who has examined the type thinks this will prove to be 0. parva Kr.
As that species is believed to be distributed by commerce this is quite possible.
Ganglbauer considers O. parva may be an exotic species introduced to Europe, where it
occurs in various localities ; and it is widely distributed elsewhere.

Hab. Oahu, one specimen under bark of a living tree, Konahuanui, 3000 ft.
(Blackburn).

564 FAUNA HAWAIIENSIS

LioPHAENA, Sharp.

Liophaena Sharp, Tn ent. Soc. London, 1880, p. 48,

Though closely allied to Oligota by means of the subgenus Oligota proper Liophaena
IS very distinct by its slender long legs and the great elongation of the basal joint
of the feet ; this segment is considerably longer than the following three together.

(i) Liophaena gracilipes^ Sharp.

% Liophaena gracilipes Sharp, Tr. ent. Soc. London, 1880, p. 47.

t L.fiaviceps Sharp, 1. c. and Tr. Dublin Soc. pi. iv. f. 9.

I have now no doubt that these two supposed species are the sexes of one only.
Mr Perkins has met with them two or three times and always apparently in company,
or at any rate in the same district. The sex with the orange-yellow head and thorax
is no doubt male.

The colour of the head and thorax in the male forms a striking contrast to the
elytra, which are intense black and highly polished, but which possess a scanty peculiar
sculpture of oblique scratches (PI. XVI. fig. 25). In the female the surface is not so
highly polished and shining. When the thorax of the male is pushed back on the
elytra, the black colour of these and of the scutellum make the base of the thorax
appear black.

Hab. Hawaii. Mts. Hualalai about 5000 ft. 5. viii. 1892; Hualalai, ix. 1900;
Kona, 5000 ft. 4. vii. 1892 and 4000 ft. 25. vii. 1892, also 3000 ft. ix. 1892 ; Kilauea,
VII. 1895 and VIII. 1895, also ix. 1896 (Perkins). Mauna Loa near the crater, about
4000 ft. (Blackburn).

(2) Liophaena centralis, sp. nov.

t Nigerrima, capite, antennis, palpis pedibusque pallide flavis ; % capite nigro.
Long, fere 2 mm.

This is extremely close to Z. gracilipes but in the male the thorax is entirely black
like the elytra. The size is a little less, and there is rather less sculpture on the elytra.

There are three examples of L, centralis from Lanai and three from Molokai.
A single female from Haleakala may perhaps also be L. centralis, but it is a very large
specimen.

Hab. Lanai, Molokai, Maui.— Lanai, 2000 ft. xii. 1893 and i. 1894. — Molokai,
2. VL 1893. — Maui, Haleakala, 5000 ft, in. 1894. (Perkins.)

COLEOPTERA 565

(3) Liophaena oahuensis, sp. nov.

t Nigerrima, nitida, capite, thorace, antennis palpis pedibusque pallide flavis ;
elytris parcissime punctatis. Long, fere 2 mm.

We have only one example and I am not sure that it is distinct from L, gracilipes.
It is a little smaller and the head and thorax ai e entirely pallid yellow ; and the sculpture
on the elytra about the suture is less marked.

Hab. Oahu. Kaala mts. 2000 ft. xii. 1892 (Perkins).

EuDiESTOTA, gen. nov.

Partes oris elongatae, graciles. Prosternum medio compresso-carinatum, valde
descendens. Metasternum inter coxas minus productum, mesosternum haud attingens,
apice acuminato.

This genus differs from Diestota by the more elongate mouth-parts, the terminal
joint of the labial palp being remarkably slender and elongate ; and by the middle
coxae being rather less widely separated and the apex of the metasternum between
them being acuminate and not joining the posterior projection of the mesosternum.
The only species is very like an Atheta, and its nearest allies seem to be Diestota
athetiformis and angustifrons.

(i) Eudiestota grandis, sp. nov.

Elongata, supra deplanata, fusco-nigra, palpis pedibusque fusco-testaceis ; capite,
thorace elytrisque opacis, subtiliter granuloso-sculpturatis ; abdomine parcius subobsolete
punctato. Long. 6 mm.

Plate XVL fig. 15.

In shape this insect resembles the larger and flatter species of Atheta. The
antennae are elongate, the penultimate joint about as long as broad ; they are strongly
setose, black, the basal two joints a little yellow at the tip. The head is broad and
short, dull, with a fine distant sculpture of minute granules. The thorax is a little
narrower, the elytra strongly transverse, distinctly narrowed behind, sculptured like the
head, but the granules more numerous, in the middle before the base distinctly flattened
but scarcely impressed. The elytra are much longer than the thorax, sculptured like it.
The abdomen is piceous, obsoletely punctate. The legs are dirty yellow, the femora
darker. The male has the last dorsal plate slightly emarginate, with a minute tooth on
each side, and between the two with about eight very short serrations, in shape very
much like the teeth of a sav\r. One specimen.

.Hab. Kauai. Mts. Waimea, 4000 ft. vi. 1894 (Perkins).

566 FAUNA HAWAIIENSIS

DiESTOTA, Muls. and Rey.

Diestota Muls. and Rey, Opusc. ent. xiv. 1870, p. 194.

This genus was founded for an insect found but very rarely on cistus flowers in the
south of France. Fauvel has since identified the species with the previously described
Bolitochara testacea Kraatz from Ceylon, and he has also informed me that our Hawaiian
Bolitockara zmpacta is again the same species. A few other species have been added
to the genus by myself. They are from Central and S. America.

Diestota is probably the most numerous in species of all the genera of Hawaiian
Staphylinidae, and it is likewise a very difficult one. I recommend the student to pay
particular attention to the sculpture of the head which in many cases is very greatly
developed, while in others it is quite obsolete. A few species are more or less inter-
mediate. For the purposes of a table the following three divisions may be of some use.

1. Elongate species, without transverse joints to the antennae and about 5 mm.

long species i — 3.

2. Smaller insects, from if to 4 mm. long.

a. Head coarsely punctured species 4—17,

b. Head obsoletely punctured species 1 8 — 29.

Group 1. Elongate species very like large species of Atheta,

(i) Diestota atketiformis, sp. nov.

Nigricans, pedibus fusco-testaceis, supra deplanata, capite thoraceque opacis
omnium subtilissime granuloso-punctatis ; elytris densius minus subtiliter granuloso
punctatis ; abdomine nitido, parce punctato. Long. 5 mm.

Very like Eudiestota grandis. Antennae with the penultimate joints distinctly
transverse. Head very dull, with a minute fovea on the middle. Thorax strongly
transverse, distinctly narrowed behind, very dull, broadly flattened along the middle and
very slightly depressed there. Elytra a good deal broader and longer than the thorax,
and much more distinctly sculptured. Male, last ventral plate obsoletely granulate,
slightly emarginate behind, with the margin serrate with seven very short serrations
and a slightly longer one on each side. One specimen.

Hab. Lanai, 2000 ft 1894 (no. 83, Perkins).

(2) Diestota currax, sp. nov.

Fusco-nigra, antennarum basi palpisque fusco-testaceis, pedibus testaceis ; capite,
thorace elytrisque opacis, capite thoraceque parcissime subtilissimeque granuloso-punc-
tatis, elytris subtiliter dense ruguloso-punctatis ; abdomine nitido, parce punctato.
Long. 5^ mm.

This is very like a large Atheta ; it is larger and broader than D, athetiformis, has

COLEOPTERA 567

a slightly longer thorax and different male characters. The mesosternum is strongly
carinate in front, but the carina does not extend further back than the most anterior
part of the middle acetabula. The male has a long curvate spine on each side of the
last ventral plate, and between the two seven or eight shorter spines ; all the spines are
blunt at the tip. One specimen.

Hab. Lanai, 3000 ft. vi. 1894 (Perkins).

(3) Dies iota angustifrons, sp. no v.

Nigra, antennarum basi palpisque fusco-testaceis, pedibus rufis ; capite, thorace
elytrisque opacis ; capite thoraceque dense minus profunde impresso-punctatis, elytris
subtiliter ruguloso-punctatis. Long. ^\ mm.

This in appearance is very similar to D. athetiformis and D, currax, but is well
distinguished by the sculpture of the head and thorax ; the parts of the mouth are
elongate and slender, and D, angustifrons appears to be the species that comes nearest
to Eudiestota, There is no carina on the mesosternum. The head is narrower than
in the similar forms, and has a small depression on the middle. The male has a long
slender spine on each side of the last ventral plate, and between the two about six very
slender spines, none of these are sharp, and each one of the middle series is well
separated from its neighbours. One specimen,

Hab. Oahu, Honolulu mountains, 2000 ft. 27. x. 1892 under bark (Perkins).

Group 2. Species not more than 4 mm. long. Head coarsely punctured. (In
D, testacea and /?. aberrans the coarse punctuation is limited to the back part of the
head.)

(4) Diestota molokaiensis, sp. nov.

Robusta, nigricans, antennarum basi palpisque fuscis, pedibus sordide rufis, abdo-
mine rufo-piceo ; capite fortiter punctato ; thorace minus fortiter transverso, medio vage
impresso. Long. 3! mm.

An obscure insect, not very closely allied to any other ; most similar to D, subpla-
giatay the elytra possessing a faint tinging of red. The antennae are short and stout,
the penultimate three or four joints very evidently transverse. Head rather narrow,
coarsely and closely punctate, dull. Thorax rather narrow, a good deal narrowed
behind, coarsely punctate but with a vague depression on the middle, and there obscurely
punctate, dull. Elytra rather finely rugose punctate, dull. Mesosternum carinate to
the tip. One specimen. A second individual is smaller and narrower ; it may be the
same species but is in bad preservation.

Hab. Molokai, 4500 ft. 23. ix, 1893; and var.? 4000 ft. 15. vi. 1893 (Perkins).

F. H. III. 73

568 FAUNA HAWAIIENSIS

(5) Diestota sculpturata, sp. nov.

Angustula, nigra, haud depressa, omnium fortiter profundeque punctata, elytris
rugosis ; antennis elongatis, pedibus rufis. Long. ■^\ mm.

Plate XVI . fig. 17.

Antennae long and slender, 3rd joint about three times as long as broad, loth
joint not transverse ; head narrow, very coarsely punctate. Thorax narrow but trans-
verse, very strongly punctate, deeply depressed on the disc. Elytra with remarkably
deep, coarse rugose sculpture. Abdomen with the punctuation more distinct than usual
in the Hawaiian Diestotae, Mesosternum not carinate.

We have received only two examples of this remarkable little insect. Both are
females. It has a good deal the facies of the genus Bolitochara.

Hab. Hawaii, Hilo, 2000 ft. on decaying stem of tree Lobelia, i. 1896 (Perkins).

(6) Diestota montana, Blackb.

Diestota montana Blackb., Tr. Dublin Soc. sen 2, iii. p. 121.

Subdepressa, nigra, antennis, palpis pedibusque testaceis ; pube minus brevi
vestita, subopaca, capite, thorace elytrisque fortiter profunde punctatis ; mesosterno
subtilissime carinato. Long. 3 mm.

Head very coarsely and densely punctured. Antennae yellow, but little infuscate,
rather short and stout, penultimate joints slightly transverse. Thorax strongly trans-
verse, but much narrower than the elytra, a good deal narrowed behind, extremely
densely, rather deeply and moderately finely punctate. Elytra much longer than the
thorax, rather coarsely, deeply punctate, the punctures on the disc of each sufficiently
distant to leave well-marked, shining interspaces. Abdomen sparingly punctate. Legs
obscure yellow, tibiae strongly pubescent.

Terminal dorsal plate in the male with a rather long slender slighdy curvate
projecting tooth on each side, and between these with seven or eight very minute,
regular serrations.

This is nearest to D, carinata^ but is less depressed and less dull, has a much
longer clothing of hairs, and a coarser punctuation. The carina of the mesosternum
is elongate, though very slightly elevated. We have received about 21 specimens,
most of which are however very much broken. It varies but little ; occasionally the
antennae are infuscate or blackish, which may be due to post-mortem change rather
than variation. I believe the type (or the portion that remains of it) of Z?. montana
belongs to this species.

Hab. Hawaii : Hilo, 11. 1897 ; 1800 ft. xii. 1895 ; on decaying stem of tree
Lobelia, 2000 ft. i. 1896; (Perkins); Waimea, Hawaii (Blackburn in Brit. Mus. ex coll.
Sharp).

COLEOPTERA 569

(7) Diestota carinata\ Sharp.
Diestota carinata Sharp, Tr. ent. Soc. London, 1880, p. 41.
Hab. Oahu, Honolulu (Blackburn).

(8) Diestota incognita, Blackb.

Diestota incognita Blackb., Tr. Dublin Soc. ser. 2, in. p. 121.
So far as I can judge from the type — which is in very bad condition — this species
must be very close to D, carinata,

Hab. Hawaii, **a single specimen was taken by beating flowers in a mountain
forest on Hawaii/' 4000 ft. (Blackburn),

(9) Diestota j^obusta, sp. nov.

Robusta, subdepressa, nigra, palpis fuscis, pedibus sordide rufis ; capite fortius
punctato, thorace fortiter transverso, dense fortiterque punctato, elytris dense subtiliter
ruguloso-punctatis. Long. 4 mm.

Antennae short and stout, penultimate three or four joints transverse. Head short
and broad, very coarsely punctate. Thorax short, flat along the middle, quite dull,
densely punctured. Elytra much longer than thorax, dull, finely but rather roughly
punctate. Legs short ; metasternum strongly carinate, the carina extending quite to
the tip. The male has a long slender, slightly curved tooth on each side of the hind
margin of the last dorsal plate, and between these seven smaller teeth. All the teeth
are well separated and blunt at the tip though not knobbed. Five specimens. Also one
of a slight variety with rather denser and finer punctuation, and slightly different male
characters.

Hab. Hawaii, Hilo, on decaying stem of tree Lobelia, 2000 ft. i. 1896; the variety,
Kaumana, 2000 ft. i. 1896 (Perkins).

(10) Diestota occidentalism sp. nov.

Nigricans, antennis fuscis, palpis pedibusque sordide testaceis ; capite lato, sat
fortiter sed parum profunde punctato ; thorace elytrisque subtilissime sculpturatis, illo
fortiter transverso. Long. 3^ mm.

This is one of the species that exhibits the sculpture of the head as a transition
between coarse and fine sculpture : the impressed punctures on it are much less deep than
they are in D, robusta, but rather more distinct than they are in D. latiuscula ; from the
latter species it is well distinguished by the more slender, slightly longer, tarsi. The
mesosternum is not carinate. I have seen only one example, a female.

Hab. West Maui, mts. 4000 ft. from Freycinetia in 1894 (Perkins),

73—2

570 FAUNA HAWAIIENSIS

( 1 1 ) Diestota subplagiata, sp. nov.

Nigricans, antennarum basi pedibusque fusco-rufis, pedibus sordide testaceis, elytris
obsoletissime rufo-plagiatis ; capite fortiter punctato, thorace elytrisque subtiliter sculp-
turatis, opacis. Long. 3 mm.

Antennae short, the penultimate five joints transverse. Head not very broad, with
a more distinct punctuation than the thorax. Thorax short, much narrower than the
elytra, very dull, finely punctate ; elytra much longer than the thorax, finely sculptured,
each vaguely longitudinally rufescent near the suture. Legs rather slender, pubes-
cence of tibiae slight. Mesosternum not carinate. Male with a minute, slightly
curvate spine on each side of the hind margin of the last dorsal plate, and between
them about ten very minute teeth,

Hab. Lanai, 3000 ft. vi. 1894 (Perkins).

(12) Diestota frontalis, sp. nov.

Nigricans, antennarum basi palpisque fusco-testaceis, pedibus testaceis, minus opaca,
capite sat fortiter punctato anterius nitido, elytris versus suturam late sed vage pallidis.
Long. 2|- mm.

This is smaller than Z). subplagiata, it is not so dull, the front part of the head
being shining, and the antennae are shorter. The resemblance to D. lurida is still
greater, but that species has the surface more shining, with more minute punctuation and
pubescence, and the large punctures on the back of the head more effaced.

The antennae are short and stout, joints 5 — 10 transverse. The head has numerous
and rather large impressed punctures except on the epistome, where it is smooth and
shining. The thorax is closely and rather coarsely sculptured with impressed punctures.
The sculpture of the elytra is fine. The mesosternum obscurely carinate. One specimen,
probably female.

Hab. Oahu, mountains near Honolulu, 2000 ft., under bark, 27. x. 1892 (no. 47,
Perkins).

(13) Diestota sordida, sp. nov.

Nigricans, antennarum basi palpisque fusco-testaceis, pedibus testaceis ; capite
fortiter punctato, thorace elytrisque subtiliter sculpturatis, opacis. Long. 2\ mm.

Closely allied to D. subplagiata, but smaller, and the elytra have not the vague
rufescent patch of the larger species. The antennae are not so stout as in some of the
allied forms, but the penultimate three or four joints are distinctly transverse. The
mesosternum is carinate on the anterior part only. The male characters are much the
same as in D, subplagiata,

Hab. Lanai, 2000 ft i. 1894 (^o- 9i» Perkins).

COLEOPTERA 571

(14) Diestota kauaiensis, sp. nov.

Nigricans, antennarum basi palpisque fusco-testaceis, pedibus testaceis ; capite
fortiter punctato, thorace elytnsque subtilissime sculpturatis, peropacis. Long. 2^ mm.

This differs from D, subplagiata as follows : the head and the thorax are a little
narrower, the punctures of the head are not quite so large, and there is a very small
obscure depression on the middle of the head ; the sculpture of the thorax and elytra is
very obsolete; the antennae are a little stouter, though the insect is smaller. One female
specimen.

Hab. Kauai, Koholuamano, 4000 ft. 15. iv. 1895 (Perkins).

(15) Diestota puncticeps. Sharp.

Diestota puncticeps Sharp, Tr. ent Soc. London, 1880, p. 41.

Is unusually coarsely sculptured all over, but is not in any way to be compared
with D, sculpturata, and the sculpture and form are very different from D, carinata.

Hab. Oahu, Honolulu (Blackburn).

(16) Diestota testacea, Kraatz.

Bolitochara testacea Kraatz, Wiegm. Arch. 1859, i. p. 7.

Diestota mayeti Muls. & Rey, Opusc. ent. xiv. p. 194, 1870.

Bolitochara impacta Blackb., Tr. Dublin Soc. sen 2, in. p. 120.

Plate XVL fig. 16.

I am indebted for the identification of this species — the type of the genus Diestota —
to Mons. A. Fauvel, who examined Mr Blackburn's type. The species seems to be
very rare; Mr Blackburn found only one specimen; as Dr Perkins met with another
example in the same locality after an interval of about 30 years, it would appear to be
really an inhabitant of Hawaii.

D. testacea is not at all like any other Hawaiian species; it may be distinguished by
its short robust form, rufescent colour, thick antennae, and a more numerous punctuation
of the abdomen. As it is the type of the genus we give a figure of our unique — and
unfortunately mutilated — example,

Hab. Oahu. ''Unique, on the shore near Honolulu" (Blackburn); Honolulu,
coast, XI. 1900 (Perkins) — S. France and Ceylon.

(17) Diestota aberrans, sp. nov.
Depressa, nigricans, pedibus testaceis, antennarum basi palpisque fusco-testaceis ;
capite thorace elytrisque subtiliter punctulatis, opacis ; antennis gracilibus, articulis
penultimis hand transversis. Long, vix 2^ mm.

572 FAUNA HAWAIIENSIS

We have only two immature specimens of this species, but I describe it, as it
makes a certain approach to the genus Athetay the metasternal lamina between the
coxae being narrower at the tip and more pointed than usual in Diestota, while the
general facies is very much that of Atheta. The antennae are — for the size of the
insect — more long and slender than in any Diestota except Z?. sculpturata. The coarse
punctures on the head can be distinguished behind, though they are very obsolete in
front; the head is less rounded at the sides than usual. The thorax is a good deal
narrowed behind, and has a broad depression on the middle. The sculpture of the
elytra is extremely fine, and their colour is rather dark brown than black, a little paler
about the scutellum, but as the specimens are immature this may not be constant.
There is a well-marked delicate pubescence of the upper surface, and about the lateral
margins of the abdomen the pubescence is markedly longer and more conspicuous
and outstanding. The male has a lateral tooth on each side of the hind margin of the
last dorsal plate, and several minute teeth between, as in most other Diestotas.

Hab. Kauai, Makaweli, 2500 ft. 11. 1897 (Perkins).

Group 3. Small insects. The punctuation of the head more or less obsolete.
(The line of demarcation between Groups 2 and 3 is quite arbitrary, D, lurida and
latiuscula might be placed in Group 2.)

(18) Diestota lurida, sp. nov.

Nigricans, pedibus sordide testaceis, elytris disco late testaceo ; sat nitida, sub-
tilissime pubescens, capite obsolete punctato, thorace elytrisque subtilissime punctatis.
Long. 2\ mm.

This species, owing to the colour of the elytra and to the sculpture and pubescence,
has a very Athetiform appearance, but it appears to be congeneric with D, subplagiata,
&c. The head has the punctuation obsolete, though the large punctures can still be
detected. The thorax is strongly transverse, slightly narrowed behind. The antennae
are short and stout, but little different from those of D. crassicornis. There is only
a trace of a carina on the mesosternum, and the male characters are like those of
D, sordiday &c.

Hab. Kauai, 4000 ft. vi. 1894 (Perkins).

(19) Diestota latiuscula, sp. nov.

Supra subplanata, capite, thorace elytrisque nigricantibus, opacis, obsolete punctatis,
abdomine piceo, antennis fuscis basi, palpis pedibusque fusco-testaceis. Long. ^^ mm.

This is a rather broad and flat species, in form more similar to D, robusta than to
any other, but considerably smaller, paler in colour, with thinner antennae, and very
distinct by the sculpture of the anterior parts. The pubescence though scanty is rather

COLEOPTERA

573

long. The antennae are moderately short and stout, the penultimate three joints slightly
transverse. The head is moderately broad, very dull; the large impressed punctures —
so distinctly seen in D. robusta — are present, but very nearly obsolete. The punctuation
of the thorax and elytra is also very obsolete. The unique individual is, I think, a
female.

Hab. Molokai, 4000 ft., 15. vi. 1893 (Perkins).

(20) Diestota lanaiensis, sp. nov.

Fusca, subdepressa, antennarum basi palpisque fusco-testaceis, pedibus sordide
testaceis; obsolete punctata breviterque pubescens, capite medio minutissime foveolato,
antennis articulis &" — 10° transversis, mesosterno ecarinato. Long. 4 mm.

This is a very Athetiform species ; it is less depressed than D.palpalis and latifrons,
to which it is allied by the absence of carina on the mesosternum. The surface is very
dull, except that the abdomen is a little shining ; there is no true punctuation ; there
is a very obscure fovea on the middle of the head, but no impression on the thorax.
The male has the last dorsal plate truncate behind, almost straight, the margin a little
thickened, but destitute of teeth or serrations. One specimen. Very distinct, on account
of the male characters.

Though D, lanaiensis and the following species are very much alike, and are
established each on single individuals (with the exception of D, mauiensis, of which I
have seen three examples), I believe they will all prove to be valid.

Hab. Lanai, about 3000 ft. 1894 (Perkins).

(21) Diestota mauiensisy sp. nov.

Nigricans, supra subplanata, antennarum basi, palpis pedibusque sordide testaceis;
capite, thorace elytrisque omnino opacis, subtilissime sculpturatis. Long. 3^ — 3^^ mm.

Extremely similar to D. occidentalism but with the punctuation of the head quite
obsolete. The species is distinguished from the rather smaller forms which follow by
the structure of the antennae, of which the 2nd and 3rd joints are subequal in length,
and the 4th and 5th almost quadrate, not distinctly transverse: the mesosternum is not
carinate: the legs, including the tarsi, are slender. The male has a moderately long
tooth on each side on the hind margin of the last dorsal plate, and between them eight
small denticles.

Hab. Maui: West Maui, mts., 4000 ft. on Freycinetia in 1894, no. 368; Haleakala,
2000 — 3000 ft., September 1901 (Perkins).

574 FAUNA HAWAIIENSIS

(22) Diestota rufescens, Sharp.

Diestota rufescens Sharp, Tr. ent. Soc. London, 1880, p. 42.

A broad insect of brown colour, very dull, the sculpture of the head extremely
obsolete, the elytra rather strongly granulate-sculptured.

Hab. Kauai, on Freycinetia in the mountain forests (Blackburn),

(23) Diestota laiifrons, Sharp.

Diestota latifrons Sharp, T. c. p. 40,

I have seen no second specimen of this species. It appears to be closely allied to
D, rufescens, but not so broad, darker in colour, and with the granules of the elytra not
so distinct.

Hab. Kauai, August, 3000 ft. on Freycinetia (Blackburn).

(24) Diestota palpalis, Sharp.

Diestota palpalis Sharp, T. c. p. 40.

Apparently closely allied to D. crassicornis but the antennae are longer, only the
penultimate three joints being transverse, and the terminal joint considerably longer.

Hab. Hawaii, Mauna Loa, 4000 ft near the crater (Blackburn).

(25) Diestota crassicornis, sp. nov.

Nigricans, antennarum basi, palpisque fuscis, pedibus sordide testaceis; capite
obsolete punctato, thorace elytrisque subtilissime sculpturatis. Long. 2f mm.

This is smaller than D, occidentalis and /?. mauiensis, and is readily distinguished
by the antennae which are much shorter, the 4th joint being small, scarcely so long as
broad, the 5th to loth strongly transverse. The large punctures of the head, though
very obsolete, can still be distinguished. Though very similar to D. sordida, brevicornis
is readily distinguished from it by the thicker antennae and the more obsolete cephalic
sculpture. The mesosternum is not carinate. The male has a tooth on each side of the
last dorsal plate, and several minute denticles between them, as in many of the allied
forms.

Hab. Maui, Haleakala, 5000 ft. October 1896 (no. 661, Perkins).

(26) Diestota parva, Sharp.

D, parva Sharp, Tr. ent. Soc. London, 1880, p. 39.

This obscure species must not be confounded with D, sordida. It is a little smaller,
the length being about 2 mm., the surface is very dull, and the punctuation of the head is
more obsolete ; the antennae are proportionately shorter and thicker. Our small series is in

COLEOPTERA 575

bad preservation but seems to indicate that this species is rather variable, or else that I
have placed more than one under the name.

Hab. Kauai, Oahu, Maui, Molokai, Lanai, Hawaii. — Kauai, 4000 ft. vi. 1894. —
Oahu: mountains, in decaying wood (Blackburn); Waianae mts. iv. 1892 (Perkins, one
specimen).— Maui, Haleakala, 5000 ft. v. 1896 (Perkins, one specimen).— Molokai,
Pelekunu, high forest, 1893 (Perkins, one specimen).— Lanai, off Pua trees, 2000 ft. 1894
(Perkins, one specimen). — Hawaii: Hilo, on decaying stem of tree Lobelia, 2000 ft.
I. 1896, ten specimens; Kaumana, one specimen: (Perkins).

(27) Diestota plana, Sharp.

Diestota plana Sharp, Tr. ent. Soc. London, 1880, p. 38.

This species is certainly very close to D, parva, and I should like to see more
specimens before I can say that I quite understand these minute Diestotas.

Hab. Oahu, Honolulu, Freycinetia flowers on the mountains (Blackburn).

(28) Diestota clavicornis, sp. nov.

Minus lata et depressa, nigricans, antennis fuscis, basi palpis pedibusque fusco-
testaceis; capite subtiliter obsolete punctato, anterius minus opaco, medio subtiliter
longitudinaliter foveolato; prothorace minus transverso, cumque elytris subtilissime
sculpturatis et pubescentibus; antennis validis apicem versus fortiter incrassatis.
Long. 2^ mm.

This is a distinct little species, the comparatively narrow head, and the very thick
antennae, separate it from all the others. Z?. molokaiensis, with a narrow head, is coarsely
sculptured. We have only one specimen, its sex is uncertain. The mesosternum is
carinate, and the metasternal process between the middle coxae is narrower than usual.
This last character distinguishes /?. clavicornis strongly from D, testacea, which though
it has somewhat similar antennae differs greatly in nearly all other characters.

Hab. Maui, Haleakala, 5000 ft. April 1894 (no. 125, Perkins).

(29) Diestota trogophleoides, sp. nov.

Minus lata et depressa, nigra, antennis fuscis, palpis pedibusque fusco-testaceis;
obsoletissime sculpturata et pubescens ; prothorace vix transverso, antennis mediocribus
apicem versus fortiter incrassatis. Long, vix 2 mm.

This minute form will not be mistaken for any other, in consequence of the narrower
and more elongate head and thorax, though D, clavicornis to a considerable extent
connects it with the rest of the genus. We have only one specimen and I do not think
it desirable to take it off the card to examine the under surface.

Hab. Molokai, 21. ix. 1893 (Perkins).

F. H. III. 74

576 FAUNA HAWAIIENSIS

EusiPALiA, gen. nov.

Pectus breve; coxae intermediae minores, metasterni processus inter eas minus
elongatus.

I separate under this name a form with short elytra (probably wingless), approaching
closely to Diestota, as exemplified by D, subcarinata. It differs therefrom not only by
the short breast but also by the smaller middle coxae, the process of the metasternum
between them being correspondingly reduced in length. This process runs forward and
meets the short mesosternal process, the space at its tip being deeply foveolate. A
false appearance of the metasternal process being very short is caused by the deep
impression on its anterior part, which at first sight suggests itself as an interval
separating the apices of the meso- and metasternal processes,

(i) Eusipalia brackyptera, sp. nov.

Nigricans, antennis fuscis, palpis pedibusque sordide testaceis ; capite thorace
elytrisque obsolete ruguloso-punctatis, opacis ; elytris thorace parum longioribus.
Long. 2^ vel 2f mm.

Distinguished from all the species of Diestota by the elytra being slightly narrowed
at the shoulders and but little longer than the thorax. The sculpture of the anterior
parts is peculiar ; it looks as if it were a coarse sculpture nearly effaced. The antennae
are rather slender, but the penultimate joints are distinctly transverse. The head is
narrow, very dull. The thorax is a little narrower than the elytra, transverse but not
strongly so, distinctly narrowed behind, very dull. Elytra flat and depressed, very
dull. Abdomen rather shining, but almost without punctuation. Male with a rather
long tooth on each side of the hind margin of the last dorsal plate and with several
small denticles between them.

One specimen ; it measures scarcely 2\ mm. but the abdomen is a good deal
contracted. The mesosternum may be obscurely carinate, but the legs nearly hide it.

Hab. Maui, Haleakala, 5000 ft. March, 1894 (no. 381, Perkins).

Atheta, Thomson.
Atheta Thomson, Skand. Col, in. 1861, p. 61.

(i) Atheta olaae^ sp. nov.

Minuta, rufo-fusca, ano pedibusque flavis, capite abdomineque ante apicem nigri-
cantibus ; antennis brevibus crassis, prothorace leviter transverso ; subtilius crebre
punctulata et pubescens. Long, vix 2 mm.

A. exilis peraffinis, statura paulo latiore, punctura et pube minus obsoletis discedit.

COLEOPTERA 577

This little insect may be distinguished from all the smaller Hawaiian Diestota by
the different thorax, which is longer in proportion to the width. The breast between
the middle coxa is very differently formed, the coxae being less widely separated and
the space between them formed by a prolongation backwards of the mesosternum, the
metasternal prolongation that meets it being very short. The punctuation is a mere
delicate roughness of the surface. Although the insect is decidedly variegate, the
limits of the tints are very indefinite. Ten specimens, badly preserved.

Hab. Hawaii, Olaa, 1895 (Perkins).

(2) Atheta coriariay Kr.

Homalota coriaria Kraatz, Ins. Deutschl. 11. p. 282.

Hab. All the islands. Widely distributed by commerce over the world.

Phloeopora, Erichson.
Phloeopora Erichson, Kaf Mark Brand. 1839, p. 311.

(i) Phloeopora cingulata, Sharp.

Phloeopora cingulata Sharp, Tr. ent. Soc. London, 1880, p. 44.

Phloeopora will be easily distinguished from the other Hawaiian Aleocharidae by
the elongate, narrow and depressed form, and the prettily variegate surface. The neck
is narrower than it is in Atheta olaae, P. cingulata was discovered by Blackburn
on Oahu and Dr Perkins has met with two individuals there. He has also found an
example on Lanai that I refer with doubt to this species. It is in bad condition.

Hab. Oahu, Lanai. — Oahu near Honolulu, under bark (Blackburn) ; Waianae
mts. IV. 1892 ; Waialua coast, ix. 1900 (Perkins).

(2) Phloeopora diluta, Sharp.

Phloeopora diluta Sharp, 1. c.

I feel doubtful whether this may prove distinct from P, cingulata. Having seen
but one specimen I must leave the question open.

Hab. Kauai, in decaying wood on the mountains, August (Blackburn).

Xenusa, Muls. and Rey.
Xenusa Mulsant and Rey, Col France Br^vip. Myrm^d, 2" partie, 1875, p. 410.

Xenusa pumila, Sharp.

Tachyusa pumila Sharp, Tr. ent. Soc. London, 1880, p. 38.

This litde insect will be recognised from most of the other Aleocharidae by the
narrow neck and truncate vertex and by its maritime habit. It is not at all likely to be

74—2

578 FAUNA HAWAIIENSIS

mistaken for any other Hawaiian form except it may be Phloeopora which lives in wood
or under bark. Dr Perkins has only found one specimen.

Hab. Maui, Molokai. — Maui (Blackburn). — Molokai (Perkins). Near the sea.

Stenagria, Sharp.
Stenagria Sharp, Biol. Centr. Amer. Col. i. pt. 2, p. 237.

(i) Stenagria C7irrax, Sharp.
Falagria currax Sharp, Tr. ent. Soc. London, 1880, p. 37.
Stenagria currax Sharp, Biol. Centr. Amer. Col. i. pt. 2, p. 233.
Hab. Oahu, Honolulu (Blackburn).

Fam. HYDROPHILIDAE.

Hydrobius Leach.
Hydrobius Leach, Zool. Miscell. 1817, p. 92.

(i) Hydrobius semicylindricus, Eschscholtz.

Hydrophilus semicylindricus Eschscholtz, Ent. p. 41 ; Sharp, Tr. Dublin Soc,
III. 1885, p. 218.

Hab. All the islands, on the plains and at various mountain elevations, in both
stagnant and running waters (Blackburn, Perkins).

(2) Hydrobius nesiticus, sp. nov.

Oblongus, nigricans, vix nitidus, antennis palpisque rufis, pedibus piceo-rufis ;
elytris striatis, striis fortiter profundeque punctatis. Long. 12 mm., lat. 5-| mm.

This is a very distinct species on account of the deep and coarse sculpture and the
very slight development of the mesosternal keel. The head is broader than in
//. semicylindricus. The arrangement of the sculpture of the elytra is almost exactly
the same as it is in H. semicylindricus, though the contrast in its coarseness is very
striking. Three specimens.

Hab. Oahu, Kawailoa gulch, far up, April 1893 (no. 65, Perkins).

Dactylosternum Wollaston.
Dacty to sternum Wollaston, Ins. Mader. 1854, p. 99.

( I ) Dacty lost ermim subquadratum, Fairmaire.

Cyclonotum subquadratum Fairmaire, Rev. Zool. 1849, p. 412; Sharp, Tr. Dublin
Soc. Ill, 1885, p. 218.

COLEOPTERA

579

Hab. Kauai, Oahu, Maui, Hawaii.— Kauai, without locality.— Oahu (Blackburn) ;
Nuuanu valley, &c,— Maui; Jao valley, West Maui.— Hawaii, Olaa and Hilo (Perkins).
In decaying vegetable matter. Tahiti.

(2) Dactylosternum abdominale, Fabricius.
Sphaeridium abdominale Fabricius, Syst, El. i. p. 94 ; Sharp, Tr. Dublin Soc. in.
1885, p. 218.

Hab. Oahu, Maui, Molokai, Hawaii.— Oahu and Maui (Blackburn).— Oahu ;
Hawaii, Olaa; Molokai and Maui (Perkins). In decaying vegetable matter. Widely
distributed outside the islands.

Omicrus, Sharp.
Omicrus Sharp, Tr. ent. Soc. London, 1879, p. 81.

(i) Omicrus brevipes, Sharp.

Omicrus brevipes Sharp, 1. c.

This little beetle has not been met with by Dr Perkins. It is much smaller than
other Hawaiian Hydrophilidae, being only i^ mm. long and i mm. broad. It has the
facies of a minute Cyclonotum,

Hab. Oahu, various elevations, generally in rotten wood (Blackburn).

Cyclonotum, Erichson.
Cyclonotum Erichson, Kaf. Mark i. 1837, p. 212.

(i) Cyclonotum extraneu7n, sp. nov.

Ovale, convexum, nigrum, antennarum basi, tarsis palpisque rufis vel piceo-rufis ;
subnitidum, dense punctatum, stria suturali antrorsum abbreviata. Long. 7^ mm., lat.
vix 4 mm.

This insect has entirely the facies of the species of Cyclonotum proper, though it is
of unusually large size. It differs from C orbiculare, the type of the genus, by the
structure of the mesosternum, the anterior part of the mesosternum having a free tip
which projects downwards beyond the posterior part ; the posterior part of the process
is longitudinally raised along the middle so that the lateral margins are not conspicuous
as they are in C orbiculare. The palpi and the club of the antennae are more elongate
than in the old species. The punctuation is very evenly distributed and is so close as
to detract very much from the polish of the upper surface.

Three specimens from Oahu, also another specimen the label of which though
somewhat obliterated I interpret as Kauai 1897.

Hab. Oahu, ? Kauai. — Oahu, Waialua coast v. 1901 and ix. 1900 (nos. 759,
760, Perkins).

DESCRIPTION OF PLATE XIII. (VOL. III.)

COLEOPTERA, LUCANIDAE, etc.

Fig. I. Apterocyclus ivaterhousei

Fig. 2. ,, feminalis.

Fig. 3. „ munroi^ anterior tibia.

Fig. 4. „ adpropinquans, anterior tibia.

Fig. 5, „ varians, anterior tibia.

Fig. 6. Eopenthes mutuus (see also fig. 9).

Fig. 7. „ basalts $ (see also fig. 10).

Fig. 8. Dacnitus cur rax.

Fig. 9. Eopenthes muticus $ , prothorax in profile.

Fig. TO. „ basalis ?, prothorax in profile.

F'ig. II. Droniaeolus perkinsi.

Fig. 12, Ceratotaxia tristis.

Fig. 13. Droniaeolus pumilio.

Fig. 1 4. Labrocerus moerens $ ,

Fig. 15. „ „ (J, antenna, i^ a Z, moerens ? antenna.

Fig. 16. Argocerus siniilaris (?, antenna.

Fig. 17. Parandrita aenea.

Fig. 18. Goniothorax conicicollis ? (see also fig. i%b\

Fig. 18^. „ cuneatus $ , pygidium.

Fig. 18^. „ conicicollis $ , pygidium.

Fig. 19. Gonioryctus suavis $,

Fig. 20. Eunitidula sublaevis.

Fig. 21. Orihostolus robustus c?, under-surface.

Fig. 22. „ prosternalis ? , prosternum.

Fig' 23. „ sordidus <?, wing x |.

Fig. 24. Cyrtostolus subalatus $. 24^ wing xf.

Fig. 25. Apetasimus involucer 9 ,

Fig. 26. „ „ <?, wing xf

Fig. 27. Apetinus macrothorax.

DESCRIPTION OF PLATE XIV. (VOL. III.)

COLEOPTERA. NITIDULIDAE.

Fig.

I.

Fig.

2.

Fig.

3'

Fig.

4-

Fig.

5-

Fig.

6.

Fig.

7 a.

Fig.

Ih.

Fig-

7^.

Fig.

7^.

Fig.

7^.

Fig.

7/

Fig.

%a.

Fig.

%b.

Fig.

ga.

Fig.

9^.

Fig.

loa.

Fig.

lob.

Fig.

11 a.

Fig.

lib.

Fig.

lie.

Fig.

12 a.

Fig.

12b.

Fig.

iZa,

Fig.

i^b.

Fig.

14a.

Fig.

14b.

Fig.

15-

Fig.

16.

Fig.

17-

Fig.

18.

Fig.

19.

Fig.

20.

Eupetinus laevigatus $ .

Notopeplus reitteri $.

Nesopeplus lambianus $ .

Nesapterus menticola $ *

Cillaeopepliis infimus 9 •

Nesopetinus metallescens ? .

Goniorydus oppositus $ , last abdominal segment, dorsal view.

„ „ „ „ ventral plate.

„ „ „ „ dorsal plate.

„ „ 9 , last abdominal segment, dorsal view.

„ „ „ „ ventral plate.

„ ,, ,, „ dorsal plate.

Nesopeplus vagepictus <J, last dorsal plate.

„ „ „ ,, ventral plate.

Goniorydus kauaiensis c? , last abdominal segment, dorsal view.

JJ »> V St >> >> JJ J>

Goniothorax inaequalis $ , last dorsal plate.
„ „ „ „ ventral plate.

Nesopeplus inauratus $ ^ last abdominal segment, dorsal view.

„ „ „ ,, dorsal plate.

„ „ „ ,, ventral plate.

Goniorydus latus $ , last abdominal segment, dorsal vievv.

Nesopetinus tindus <?, last dorsal plate.

„ „ „ „ ventral plate.

Nesopeplus bidens $ , last ventral plate.

„ „ „ „ dorsal plate.

Prothorax oi Nesopeplus inauratus <J, seen inverted, legs removed.

„ „ Nesopetinus metallescens i „ „ ,,

Prothorax of Nesopeplus inauratus S , seen from behind,

„ ,, Nesopetinus metallescens $ „ „

Eupetinus brevicornis $ , antenna.
Elytron of Eupetinus^ various species, var. dimidiatus.

N.B. The outline figures 7 to 14 are all equally magnified on a scale of about ^j^.

HiJNA HAWAII

Shari) & bcot.t

jber-a Nitidulidae

DESCRIPTION OF PLATE XV. (VOL. IIL)

COLEOPTERA. HISTERIDAE, etc.

Fig. I. Acritus minor ^ keel of presternum in surface view.

Fig. 2. „ „ „ prosternum in side view.

Fig. 3. „ ornatus.

Fig. 4. 5, facilis.

Fig. 5. „ kauaiensis, keel of prosternum.

Fig. 6. „ „ wing; «, length of elytron to same scale.

Fig. 7. „ kukuiae, base of elytron.

Fig. 8. „ punctatus^ dorsal.

Fig. 9. „ „ ventral.

Fig. 10. „ sailptus, dorsal.

Fig. II. „ „ ventral.

Fig. 12. „ „ keel of prosternum.

Fig. 13. „ ^a/^^ze/^/M^, keel of prosternum.

Fig, 14. „ „ elytron.

Fig. 15. „ ?e^«/^;z<7^^, keel of prosternum.

Fig. 16. „ basalts, keel of prosternum.

Fig, 17. ,, subbasalis^ pro- and mesosterna.

Fig. 18. „ eutretus.

Fig. 19. „ lanaiensis.

Fig. 20. ,, ,, pro- and mesosterna.

Fig. 21. „ angustisternum.

Fig. 22. „ „ keel of prosternum.

Fig. 23. „ perkinsi „ „

Fig. 24. „ „ pronotum.

Fig. 25. „ siibalatus, with right elytron removed; a, wing.

Fig. 26. „ „ wing, more enlarged; a, length of elytron to same scale.

Fig. 27. „ concetitricus.

Fig. 28, „ flavitarsis, ventral.

Fig. 29. „ „ pro- and mesosterna.

Fig* 2P' »j insolitus^ pro-, meso- and metasterna.

Fig. 31. „ „ keel of prosternum.

Fig. 32. ,, parviilus^ keel of prosternum.

Fig- 33- »j subrotundus^ ventral.

Fig. 34. „ ,, keel of prosternum.

Fig. 35. „ insularis, dorsal.

Fig. 2,6. „ „ ventral.

Fig. 37. Bacanius atomarius^ pro- and mesosterna, &c.

Fig. 38. Fallia elongata ; one half of the bent-up hind portion of the metasternum, seen from behind,

with the coxa in situ:, ep, epimeron; eSy episternum; ms^ metasternum;,

fl^ membranous floor of coxal cavity; c^ coxa; /r, trochanter; / femur.

Fig. 39. „ „ a similar view to the preceding, but on the other side of the body, and with

the leg entirely removed, showing the empty slot for the coxa; a^ portion

of the cavity in which the globose distal end of the coxa lies; b^ slot for

the long portion of the coxa.

N.B. Figures all made with the help of a drawing apparatus. The differences of curvature of the front
margins of prosterna (e.g. figs. 23, 32) are not entirely natural, but are due, in part at any
rate, to the difficulty of representing curved surfaces by plane figures.

\ 7<^ |f

f ^^ *l

f

I ii ]

'^HiP

■J f •/

'H I ^

C- V

I /-^

^:mf ^«

v'^r^^^l

Iff '^ :y<

\ — )S0<^1

^-^ :^

_, ft::

■.,4/1 Ai,^c:A I I

4^

\^;

>^sa>..

^^:i^' (iily^ilii!^

Fig.

I.

Fig.

2.

Fig.

3-

Fig.

4'

Fig.

5'

Fig.

6.

Fig-

7-

Fig.

8.

Fig.

9-

Fig.

10.

Fig-

II,

Fig.

12.

Fig.

13.

Fig.

14.

Fig.

15-

Fig.

16.

Fig.

17-

Fig.

18.

Fig.

19.

Fig-

20.

Fig.

21.

Fig.

22.

Fig-

23-

Fig.

24.

Fig.

25-

DESCRIPTION OF PLATE XVL (VOL. III.)

COLEOPTERA. NITIDULIDAE, STAPHYLINIDAE, etc.

Nesopetinus blackburnianus $ , dorsal termination of abdomen.
„ (?, ventral

,, blackburni <J, dorsal „ ,, ,,

» >> c? •

Nesopeplus serratus $, termination of abdomen ventral (the sidepieces are the lateral portions of the

dorsal plate).

Nesopetinus concolor $ , right hind foot.

,, fiUpes $ „ „ „
Derolathrus atomarius,

„ „ middle tibia and tarsus.

„ ., antenna.

,, „ pro- and mesosterna.

Propalticus oculatus.

„ ,, antenna.

„ „ anterior foot.

Eudiestota grandis,
Diestota iestacea,
Diestota sculpturata.
Oligoia lati/rons, head.
„ prolixa^ head.
Ptiliodes insignis, head and thorax.
Nesomedon brunnescens,
Leurocorynus cephalotes.
Xanthocorynus deceptor.
Nesomedon quadratus, elytra.
Liophaena gracilipes^ elytron.

^"AUNA HAWAHENSIS^

VOLJiI/F^LATE XVJ

ZOOLOGICAL RESULTS based on material from New Britain, New Guinea, Loyalty
Islands and elsewhere, collected during the years 1895, 1896, and 1897, by
Arthur Willey, D.Sc. Lond., Hon. M.A. Cantab., Late Balfour Student of the
University of Cambridge. Demy 4to. Parts I, II, and III. Price 12^. 6af. each.
Parts IV and V. Price 21^. each. Part VI (completing the work). Price 125. 6d,

PART I. 1898.

1. The anatomy and development of Peripatus novae-britanniae. By Arthur Willey, M.A., D.Sc.

With Plates I. — IV. and 7 figures in the text.

2. Metaprotella sandalensis, n. sp. [Caprellidae]. By Dr PAUL MAYER. With 6 figures in the text.

3. On a little-known Sea-snake from the South Pacific. By G. A. BOULENGER, F.R.S.

With Plate V.

4. Report on the Centipedes and Millipedes. By R. I. POCOCK. With Plate VI.

5. Account of the Phasmidae with notes on the eggs. By D. SHARP, M.A., F.R.S.

With Plates VII.— IX.

6. Scorpions, Pedipalpi and Spiders. By R. I. PocoCK. With Plates X. and XI.

PART II. 1899.

7. Report on the specimens of the genus Millepora, By SYDNEY T. HiCKSON, M.A., D.Sc, P'.R.S.

With Plates XII.—XVI.

8. Report on the Echinoderms (other than Holothurians). By F. JEFFREY BELL, M.A.

With figures on Plate XVII. and one figure in the text.

9. Holothurians. By F. P. Bedford, B.A. With figures on Plate XVII.

10. Report on the Sipunculoidea. By ARTHUR E. Shipley, MA. With Plate XVIII.

11. On the Solitary Corals. By J. STANLEY GARDINER, M.A. With figures on Plates XIX. and XX.

12. On the postembryonic development of Cydoseris, By J. STANLEY Gardiner, M.A.

With figures on Plates XIX. and XX.

13. On a collection of Earthworms. By Frank E. Beddard, M.A., F.R.S. With Plate XXI.

14. The Gorgonacea. By ISA L. HiLES, B.Sc. With Plates XXII. and XXIIL

FART III. 1899.

15. Orthogenetic variation in the shells of Chelonia. By HANS Gadow, M.A., Ph.D., F.R.S.

With Plates XXIV.~XXV. and one text-figure.

16. Enteropneusta from the South Pacific, with notes on the West Indian Species. By Arthur

Willey, D.Sc, Hon. M.A. Cantab. With Plates XXVI.— XXXII. and seven text-figures.

17. On a collection of Echiurids from the Loyalty Islands, New Britain and China Straits, with an attempt

to revise the group and to determine its geographical range. By ARTHUR E. SHIPLEY, M.A.
With Plate XXXIII.

PART IV. 1900.

18. On the anatomy of a supposed new species of Coenopsammia from Lifu. By J. STANLEY

Gardiner, M.A., Fellow of Gonville and Caius College, Cambridge. With one plate.

19. On the Insects from New Britain. By D. Sharp, M.A., M.B., F.R.S. With one plate.

20. Report on the Stomatopoda and Macrura. By L. A. BORRADAILE, M.A., Lecturer of Selwyn

College, Cambridge. With four plates.

21. Report on the Slugs. By Walter E. Collinge, F.Z.S., Mason College, Birmingham

With two plates.

22. Report on the Polyzoa. By E. G. PiiiLiPPS, Newnham College, Cambridge. With two plates.

23. The Hydroid Zoophytes, By LAURA ROSCOE Thornely, University College, Liverpool.

With one plate.

24. Astrosclera willeyana, the Type of a new Family of Calcareous Sponges. By J. J. LiSTER, M.A.,

St John's College, Cambridge. With five plates.

25. A contribution towards our knowledge of the Pterylography of tHe Megapodii. By W. P.

PyCRAFT, A.L.S., British Museum. With one plate.

26. The Stolonifera and Alcyonacea. By SYDNEY J. HiCKSON, M.A., D.Sc, F.R.S., Beyer Professor

of Zoology in the Owens College, and ISA L. HiLES, B.Sc, Owens College, Manchester.
With two plates.

27. Report on the Xeniidae. By J. H. Ashworth, B.Sc, Demonstrator in Zoology, Owens College,

Manchester, With two plates.

PART V. 1900.

28. A Description of the Entozoa collected by Dr Willey during his sojourn in the Western

Pacific. By ARTHUR E. Shipley, M.A. With Plates LIV.— LVI.

29. On some South Pacific Nemertines collected by Dr Willey. By R. C. PUNNETT.

With Plates LVII.-~~LXI.

30. On the Young of the Robber Crab. By L. A. BORRADAILE, M.A. With figures in the text.

31. Anatomy of Neohelia porcellana (Moseley). By Edith M. Pratt, M.Sc.

With Plates LXII. and LXIII.

32. On a new Blind Snake from Lifu, Loyalty Islands. By G. A. BoULENGER, F.R.S.

With figures in the text.

33. On Crustacea brought by Dr Willey from the South Seas. By the Rev. T. R. R. Stebbing, F.R.S.

With Plates LXIV.— LXXIV.

PART VI. 1902.

34. Contribution to the Natural History of the Pearly Nautilus. By ARTHUR WiLLEY, D.Sc, F.R.S.

I. Personal Narrative. IL Special Contribution.
With Plates LXXV.— LXXXIIL, a map and fifteen text-figures.

CAMBRIDGE UNIVERSITY PRESS

HottllOtt: FETTER LANE, E.G.

C. F. CLAY, Manager

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