MEMOIRS

ve OF THE

AMERICAN ENTOMOLOGICAL SOCIETY
NUMBER 10

A REVISION OF THE

NORTH AMERICAN SPECIES
BELONGING TO THE

GENUS PEGOMYIA

(DIPTERA: MUSCIDAE)

BY
H. C. HUCKETT

PUBLISHED BY THE AMERICAN ENTOMOLOGICAL SOCIETY
AT THE ACADEMY OF NATURAL SCIENCES
PHILADELPHIA

1941

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MEMOIRS
OF THE
AMERICAN ENTOMOLOGICAL SOCIETY
NUMBER 10

- A REVISION OF THE

NORTH AMERICAN SPECIES
BELONGING TO THE

GENUS PEGOMYIA

(DIPTERA: MUSCIDAE)
ee BY -
H. C. HUCKETT

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PUBLISHED BY THE AMERICAN ENTOMOLOGICAL SOCIETY
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MEMOIRS
OF THE

AMERICAN ENTOMOLOGICAL SOCIETY
NUMBER 10

A REVISION OF THE NORTH AMERICAN SPECIES
BELONGING TO THE GENUS PEGOMYIA
(DIPTERA: MUSCIDAE)

H. C. HUCKETT
* Riverhead, New York

The genus Pegomyia Robineau-Desvoidy was originally pro-
posed for the reception of a small group of anthomyid flies, the
larvae.of which were reported as leaf-miners in certain plants.
At the present, the genus stands for a large composite grouping of
species, the larval habits of many of which are known to differ
widely. For instance the larvae of some North American forms
have been found to inhabit the burrows of rodents and land
turtles, and in the case of others of wider geographical represen-
tation to feed on mushrooms and to tunnel around canes of rasp-
berry, whilst as leaf-miners the species are known to inhabit the
foliage of an increasing variety of plants, e. g., thistles, convol-
vulus, spinach, ragweed and dock.

The genus is widely distributed throughout the Northern
Hemisphere, and the species are not uncommon in many parts of
this area. Nearly one hundred species are herein recorded as
occurring in North America.

The genus is not readily defined owing to the limited nature of
many of the characters possessed by the species. Despite this
handicap the genus serves a useful purpose in providing a common
ground for the assemblage of a large number of associated groups
of species. These minor segregates are frequently more easily
distinguished for diagnostic purposes than the genus itself, one of

MEM. AMER. ENT. SOC., IO

2 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

the most helpful clues to their recognition being the structure and
character of the copulatory appendages in male. The genus, thus
composed, impinges naturally at certain points on the boundaries
of other genera belonging to the subfamily Anthomyiinae. Some
species ascribed to such genera I have transferred to Pegomyia on
the evidence provided by the common characters possessed, by the
hind tibiae as denoted by the presence of two bristles on antero-
dorsal and posterodorsal surfaces respectively, and in the male
sex by the lack of a series of setulae on posteroventral surface.
The genus may be distinguished from Emmesomyia Malloch and
Taeniomyia Stein by the absence of a bristle or setulose hairs on
upper border of pteropleura below the wing, and from Paregle
cinerella (Fallén) by the absence of a wartlike tubercle on dorsal
surface of second antennal segment. Malloch! has pointed out
that there may be some pegomyian forms in North America ap-
plicable to Stein’s european genus Enneastigma, but as yet no
structural characters have been proposed that would warrant
their transfer to that genus.

SYNONYMY

In dealing with the synonymy of palaearctic species occurring
in North America I have in large measure restricted the citations
to the period following the publication of Stein’s? first monograph
on the european species of Pegomyia and of the third volume of
Katalog der Palaarktischen Dipteren issued during the following
year. More recent treatment of the synonymy may be found in
Séguy’s‘ comprehensive work on the Muscidae of the World
issued in 1937 as a fascicle of Genera Insectorum, and in Ring-
dahl’s® synoptic revision of the Swedish species of Pegomyia pub-
lished in 1938.

1 Malloch, J. R. A synopsis of the North American species of the genus Pegomyia
Robineau-Desvoidy (Diptera, Anthomyiidae). Bull. Brooklyn Ent. Soc., Xv, pp. 121-
127, 1920.

2Stein, P. Die mir bekannten europdischen Pegomyia-Arten. Wzen. Ent. Zeitg.,
XXV, Pp. 47-107, 1906.

$Stein, P. Katalog der Palaarktischen Dipteren. 111, pp. 700-710, 1907.

4Séguy, E. Genera Insectorum. fasc. 205, pp. 48-67, 1937:

5 Ringdahl, O. Oversikt av svenska Pegomyia-arter (Diptera: Muscidae). Entomol.
Tidskr., L1X, (hft. 3-4), pp. 190-213, 1938.

H. C. HUCKETT 3

EXPLANATION OF DESCRIPTIVE TERMS

The distance separating the eyes is measured at narrowest part
of frons: the width of parafacial is measured in profile at its greatest
development near base of antennae: the height of cheek is measured
below the most ventral extension of eye margin: the postgenal
margin denotes the boundary between occipital and genal regions at
the caudoventral angle of head: the postvertical pair of bristles is
situated on the occipital region caudad of the inner pair of vertical
bristles: the third antennal segment is considered yellowish proxi-
mad if the yellowish area on inner surface extends distad of a
point opposite base of arista; if not, the segment may be invariably
considered entirely blackish.

The pronotal setulae are situated on the planes of acrostical
and dorsocentral bristles along the cephalic border of mesonotum
opposite the occipital region of head: stigmatal bristles are situated
below mesothoracic spiracle: apical setulae of scutellum are situ-
ated between apical pair of bristles: the anal sclerite in male forms
that part of hypopygium surrounding the anal membrane: basal
sclerite is situated immediately cephalad of anal sclerite: the pre-
basal sclerite is placed cephalad of basal sclerite and is in the male
of many species obscured from view by the overlapping of tergum 5.
The nomenclature of the wings is according to Comstock.*®

ACKNOWLEDGMENTS

I wish to acknowledge my indebtedness to all those entomolo-
gists who have kindly permitted me to use the collections in their
charge as a basis for this contribution on the pegomyian fauna of
North America. Among the Institutions that have thus generous-
ly helped are the Academy of Natural Sciences of Philadelphia
[A. N. S. P.], United States National Museum [U. S. N. M.],
Entomological Branch of the Canadian Department of Agriculture
[C. N.-C.J, Illinois Natural History Survey [Ill. N. H. S.J], New

g Comstock, J. H. The wings of insects. pp. 1-430, 427 figs., 1918.

MEM. AMER. ENT. SOC., 10

4 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

England Museum of Natural History [N. E. M. N. H.], Field
Museum of Natural History, Cornell University [C. U.], American
Museum of Natural History [A. M. N. H.], Carnegie Museum and
Ohio State Museum. Material has also been submitted for study
from the collections of Brigham Young University, Colorado
State College, Macdonald College, Quebec, Michigan State Col-
lege, Oklahoma Agricultural and Mechanical College, Oregon
State College, South Dakota State College, Texas Agricultural
and Mechanical College, Utah Agricultural College, and from the
Universities of Alberta and Wisconsin. Abroad I have had the
privilege of examining North American species in the collections
of the British Museum of Natural History, Zoological Museum of
the University of Berlin [Z. M. U. B.], Zoological Museum of the
University of Copenhagen [Z. M. U. C.], ’S Rijks Museum at
Leiden and Muséum National d’ Histoire Naturelle. Reference to
the source of such material in the following records has been in-
cluded within brackets |], and in many instances the full name has
been abbreviated to capital letters as indicated above.

I also wish to express my appreciation for the loan of material
from the private collections of Dr. A. L. Melander [A. L. M.],
A. J. Basinger, F. S. Blanton, G. Steyskal, F. M. Snyder, J. Wilcox,
and also for the help thus given by the late Dr. J. M. Aldrich,
Professor J. S. Hine and Mr. C. W. Johnson. Material retained
in the author’s collection is denoted by the initials [H. C. H.].

To Mr. Oscar Ringdahl I am deeply indebted for assistance and
advice with regard to problems relating to the identity of pegomy-
ian species common to the fauna of Sweden and North America.

PEGOMYIA Robineau-Desvoidy

Pegomyia Robineau-Desvoidy, Essai Myod., p. 598, 1830. Macquart, Hist. Nat.
Ins., I, p. 351, 1835. Westwood, Intr. Mod. Class. Ins., Suppl., 1, p. 143, 1840.
Meade, Descr. List. Brit. Anth., 1, p. 53, 1897. Stein, Berl. Ent. Zeitschr.,
(1897), XLII, p. 236-249, 286, 1898. Aldrich, Misc. Coll. Smithsn. Inst., XLv1, p.
558-559, 1905. Stein, Wien. Ent. Zeitg., XxXv, p. 47-107, 1906. Stein, Kat.
Palaark. Dipt., 11, p. 700, 1907. Williston, Man..N. A. Dipt., 3rd ed. p. 336,
1908. Coquillett, Proc. U. S. Nat. Mus., xxxvu, p. 586, 1910. Schnabl, Hor.
Soc. Ent. Ross., XXXIX, p. 105-114, 3 pls., 1910. Schnabl and Dziedzicki, Abh.
K. Leop.-Carol. Deutsch. Akad. Naturforsch., xcv, nr. 2, p. 108-112, IQII.
Stein, Arch. f. Naturgesch., (1913), Lxx1x, (A), hft. 8, p. 33-36, 1914. Stein,

H. C. HUCKETT 5

Arch. f. Naturgesch. (1915), Lxxx1, (A), hft. 10, p. 13, 123-131, 221, 1916.
Malloch, Trans. Amer. Ent. Soc., XLIV, p. 295, 300, 1918. Stein, Arch. f. Natur-
gesch., (1917), Lxxxi, (A), hft. 1, p. 148, 149, 1919. Malloch, Rept. Can.

- Arct. Exped., 1913-18, 11, C, p. 74C, 1919. Stein, Arch. f. Naturgesch., (1918),
LXXxIV, (A), hft. 9, p. 63-73, 1920. Malloch, Bull. Brooklyn Ent. Soc., xv, p.
121-127, 1920. Séguy, Faune de France, v1, p. 148-166, 1923. Huckett, Mem.
77, N. Y. (Cornell) Agr. Exp. Station, (1923), p. 40-48, 1924. Enderlein,
Fauna Deutschlands, 3rd. ed., p. 341, 1925. Karl, Tierwelt Deutschlands,
XIII, pt. 3, p. 122-144, 1928. Ringdahl, Entomol. Tidskr., Liv, p. 2, 1933.
Curran, Fam. Gen. N. A. Dipt., p. 393, 1934. Séguy, Gen. Insect., fasc. 205,
p. 48-67, 1937. Ringdahl, Entomol. Tidskr., L1x, hft. 3-4, p. 190-213, 1938.

Phoraea Robineau-Desvoidy, Essai Myod., p. 600, 1830.

Zabia Robineau-Desvoidy, Essai Myod., p. 600, 1830.

Chlorina Robineau-Desvoidy, Essai Myod., p. 602, 1830.

Anthomyia (Pegomyia) Strobl, Verh. K. K. zool.-bot. Ges. Wien, XLIn, p. 250-252,
1893. Pandellé, Rev. Ent. France, XX, p. 290, 1901.

Pegomyza Karl, Tierwelt Deutschlands, x11, pt. 3, p. 121, 1928.

Chortophila (Nudaria) Karl, Tierwelt Deutschlands, x11, pt. 3, p. 171, 1928.

Chortophila (Nupedia) Karl, Zool. Anzeiger, LXXXVI, p. 174, 1930.

GENOTYPE: Musca hyoscyami Panzer. (Designation of Coquil-
lett, 1910.)

The genus Pegomyia was erected by Robineau-Desvoidy (1830)?
for the reception of six nominal species, the larvae of which were
recognized as leaf-miners. Of these species only the first, namely
Pegomyia hyoscyamt (Panzer), has retained its identity in the
writings of subsequent authors.

Macquart (1835) enlarged the genus to include the names of

sixteen nominal species, and in so doing absorbed the four subse-
quent remaining genera of Robineau-Desvoidy’s tribal segregate
Pegomydae.
. Westwood (1840) selected Anthomyia fulgens Meigen as type of
Pegomyia, a species evidently not represented in the original
series and hence may be regarded as ineligible for type designation
as defined by the Code.

No formal recognition of the genus is given in the larger works of
Zetterstedt, Siebke, Schiner, Nehaus, Bigot or Rondani. The
latter author split the pegomyian species into two groups, placing

7 Refers to literature cited in the synonymy as indicated by the year of publication.

MEM. AMER. ENT. SOC., IO

6 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

in Anthomyia those with slightly developed frontal head sclerites
in male and prominently extended lower calyptral’scale, and in
Chortophala those with extensively molded head parts and incon-
spicuous lower scale.

Meade (1897) in his classification of the British Anthompidae
broadened the concept of the genus to include flies of the sub-
family Anthomyiinae with bare arista and yellowish legs, abdomen
yellowish or darkened and calyptral scales of equal and unequal
development. On the other hand Strobl (1893) and Pandellé
(1901) maintained the group as a part of the genus Anthomyia..

Coquillett® in 1901 designated Musca hyoscyam1 Panzer as the
genotype of Pegomyia, and later he (1910) broadened the concept
of the genus to include the genera Phorbia, Egle, Chortophila of
authors, and also other little known groups proposed by Robineau-
Desvoidy and Lioy.

Schnabl (1910) and Schnabl and Dziedzicki (1911) concluded
that the genus Pegomyia contained species which could be distin-
guished from those in related groups by the narrower frons in
male, and that the group consisted of a number of small segregates
in which the basic distinction lay in the structure of the male
genitalia and copulatory appendages. The genus was divided
into four subgenera, of which Pegoplata and Pegomyza were charac-
terized as having plumose arista, Anthomyia with black legs, and
Pegomyia with mostly yellowish legs. If Schnabl’s classification
is to be adopted the name Anthomyia would necessarily supercede
that of Pegomyia for the genus owing to its priority, and as a
result it would become necessary to make ID UIESO.82, chang >t in
the names applied to higher categories.

Stein (1897) (1906) (1907) (1914) in his earlier conteibutions
restricted the genus to include species with bare or nearly bare
arista, yellowish basal segments of antennae, and yellowish legs;
In later years he included species with plumose arista, which, in
common with many others belonging to the genus, were charac-
terized by the possession of two antero- and two (pose sceotee
bristles on hind tibia. ° Se NT Chas Sea A

8 Coquillett, D. W. Types of anthomyid genera. Journ. N. Y. Ent. Soc., 1X, pp.
g'
139-140, 1901.

H. C. HUCKETT 7

Malloch (1918) (1920) following Stein in his treatment of the
genus included allied species with black tibiae that had two postero-
dorsal bristles on hind tibia. None of the species in the genus
possessed short erect hairs on posteroventral surface of hind tibia
in male. This concept of the genus included many species belong-
ing to Chortophila and Phorbia of authors, Eremomyza Stein (1920),
and more recently Nupedia Karl (1930).

Séguy (1923) in his treatment of the French fauna utilized to a
large degree the classification erected by Schnabl. The so-called
Pegomyinae were restricted to three genera, namely Pegomyia,
‘Anthomyia and Calythea. The former was further subdivided into
two subgenera, Pegoplata and Pegomyia. Pegomyza was regarded
asa synonym of Pegoplata.

Karl (1928), in classifying the German forms, more correctly,
in my opinion, maintained the tribal name Anthomyini, in which
both Pegomyza and Pegomyyja are given full generic rank. Antho-
myia virginea Meigen is given as typical of Pegomyza, of which
Pegoplata is mentioned as a synonym. Since the name vwirginea
was not included by Schnabl and Dziedzicki (1911) in the original
series under Pegomyza I am doubtful whether that species may be
considered available for type designation unless it can be shown
more conclusively that virginea is conspecific with one or more of
the forms listed in Pegomyza. The group Nupedia (Nudaria
preoc.) was erected by Karl (1930) for the reception of dark-legged
forms as exemplified in Anthomyia dissecta Meigen. Stein (1916)
had previously included such species in Chortophila.

More recently Séguy (1937) in his comprehensive monograph
on the genera of the family Muscidae has largely followed Stein in
his citation of the characters definnig the genus Pegomyia. The
groups Pegomyza and Pegoplata are contained within the meaning
of the genus. The type of Pegoplata is cited as Pegomyia palpata
Stein, the first name given by Schnabl and Dziedzicki (1911) in
the series of species belonging to the group. Stein (1916) has
drawn attention to the fact that the species was misnamed by
Schnabl, the proper name for which should have been Hydrophoria
palposa Stein, a species closely allied to virginea Meigen. Since
palpata and palposa represent widely separated groups of species

MEM. AMER. ENT. SOC., 10

8 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

within the genus the character and relationship of the group
Pegoplata will depend largely on the decision concerning which
species may be accepted as the valid type.

Ringdahl (1938) in his review of the Swedish species has divided
the genus Pegomyza into eight subgenera, namely Pegomyza with
type Anthomyia praepotens Wiedemann, Pegoplata with type
Anthomyia virginea Meigen, Arctopegomyia Ringdahl with type
Anthomyza tunicata Zetterstedt, Chaetopegomyia Ringdahl with
type Anthomyia setaria Meigen, Emmesomyia Malloch with type
E. unica Malloch, Phoraea R.-D. with type Anthomyia silacea
Meigen, Pegomyia R.-D. with type Musca hyoscyami Panzer and
Pegomyiella Ringdahl with type Anthomyza lunatifrons Zetter-
stedt. All these groups with the exception of Emmesomyia, which
I regard as entitled to generic rank, and possibly Phoraea, are
represented in the North American fauna as herein restricted.
The true significance of such groupings in this instance however
cannot be properly evaluated with any degree of accuracy for lack
of the opportunity to make the necessary comparative studies.

SUMMARY OF FAUNAL RECORDS

One of the earliest records extant of the capture of pegomyian
flies in North America is to be found in the New England collec-
tions of William Harris. According to Johnson® specimens taken
by Harris were submitted to Say in 1833 for identification, and
among the specimens were several that had received the manu-
script name Anthomyia lenis. Johnson, in studying the collection
later, recognized two species among the material represented as
lenis, namely Alloeostylus diaphanus (Wiedemann) and Pegomyia
geniculata (Bouché).

Early references to the occurrence of pegomyian species in
North America are to be found among Walker’s!° published records
of 1849. Such congeneric forms as Anthomyia hpsia and Eriphia
flavifrons were captured in the Hudson Bay Territory, Coenosia
substituta from Massachusetts. The latter species was shown by

*Johnson, C. W. Diptera of the Harris Collection. Proc. Boston Soc. ‘Nat. Hist.,
XXXVIII, pp. 92-93, 1925.

10 Walker, F. List of the specimens of dipterous insects in the collection of the
British Museum, Iv, pp. 928, 966, 971, 1849.

H. C. HUCKETT 9

Stein"! to be identical with ipsta. In 1867 van der Wulp” de-
scribed the pegomyian species Anthomyia tarsata from a collection
of flies taken in Wisconsin. In 1878 Meade® published a synopsis
of the results of his examination of a collection of North American
Anthomyiidae sent to him by Osten Sacken, in which amongst
others he recognized specimens that reminded him of such european
species as Anthomyza gilva, A. vittigera and A. flavoscutellata of
Zetterstedt. Hagen published a fuller report of the material
examined by Meade when that collection had been returned by
Osten Sacken. to the Museum of Comparative Zoology at Cam-
‘bridge. This later list included the species Anthomyza latitarsis
Zetterstedt, a record omitted in Meade’s previous communication.
Osten Sacken* did not mention the genus Pegomyza in his cata-
logue of diptera from North America, preferring to retain the
names of species as originally designated by the various authors.

In 1898 Stein!® recorded thirteen nominal species in Pegomyia
from the collections of Aldrich, Johnson and Nason. Of these
forms I consider that trilineata and trivittata belong properly to
Hylemyia, and setosa should be placed in Malloch’s genus Ere-
momyoides. The remaining records consist of seven new native
species and three european. Among the latter is included the
species calyptrata (Zetterstedt), a record which in my opinion was
based mistakenly on material representing another species, name-
ly triseta Malloch. In 1905 Aldrich!’ following closely Stein’s
records cited the names of thirteen nominal species in Pegomyia

1 Stein, P. Die Walker’schen aussereuropdischen Anthomyiden in der Sammlung
des British Museum zu London. Zettschr. f. Hymen. u. Dipt., 1, (hft. 4), p. 212, 1901.

12. Van der Wulp, F. M. Eenige Noord-Americaansche Diptera. Tydschr. v. Ent., x,
Pp. I5I, 1867.

13 Meade, R. H. Notes on the Anthomyiidae of North America. Ent. Month. Mag.,
XIV, pp. 250-252, (1877-1878), 1878.

14 Hagen, H. A. List of N. American Anthomyidae, examined by R. H. Meade, Esgq.,
Bradford, England. Can. Ent., xi11, pp. 43-51, 1881.

18 Osten Sacken, C. R. Catalogue of the described Diptera of North America. Smithsn.
Miscel. Coll., 111, pp. 167-170, 1878.

16 Stein, P. Nordamerikanische Anthomyiden. Berl: Ent. Zeitschr., XLu, pp. 236-
249, (1897), 1898. ij

W Aldrich, J. M. A catalogue of North American diptera (or two-winged flies).
Smithsn. Miscel. Coll., XLV1, pp. 558-559, 1905.

MEM. AMER. ENT. SOC., IO

IO NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

from North America. In this list the names conformis (Fallén)
and vicina Lintner are retained for species that are identical with
hyoscyamt (Panzer). The species Pegomyia nitidula Coquillett I
regard as allied to Chortophila sepia (Meigen), and hence does not
belong to Pegomyza.

There are twenty two names of North American species of
Pegomyia given by Stein!’ in his analytical study of the noneuro-
pean species of Anthomyiidae. Among these names are three that
are included as synonyms, three that have heretofore been included
in Hylemyia, and one that is doubtfully retained. Among the
species recorded are Pegomyia bucculenta Coquillett which I regard
as identical with Hylemyia brassicae (Bouché), Spilogaster socialis
Stein as a species of Emmesomyia Malloch, and Anthomyia tarsata
(van der Wulp) which I consider a valid species although listed as
a synonym of lipsia (Walker).

In 1920 Stein!® published his second contribution on North
American Anthomyiidae, in which is presented a key to twenty
seven species and one variety of Pegomyia. Seven species are
described as new, of which I regard fuscinervis as identical with
duplicata Malloch, and setigera as belonging to the genus Hylemyia.
The european names gilva (Zetterstedt) and bivittata Stein are
given for species that I consider have appeared in North American
literature under the names /uteola Malloch and lativittata Malloch
respectively. The european species P. squamifera Stein, which is
regarded by Ringdahl as a synonym of P. rufina (Fallén), is re-
corded for the first time as occurring in North America. Stein
has described three new forms under Chortophila, namely glabra,
latipalpis, nigroscutellata, that I have transferred to Pegomyia on
the strength of characters presented by the bristling on hind
tibiae.

Stein, P. Die Anthomyidengattungen der Welt, analytisch bearbeitet, nebst
einem kritisch-systematischen Verzeichnis aller aussereuropadischen Arten. Arch. f.
Naturgesch., LXxxu, (A), hft. 1, pp. 148-149, (1917), 1919.

19 Stein, P. Nordamerikanische Anthomyiden. 2. Beitrag. Arch. f. Naturgesch.,
LxxxIVv, (A), hft. 9, pp. 63-74, 88-91, (1918), May 1920.

H. C. HUCKETT II

Malloch®* in the same year published a key to thirty nine North
American species of Pegomyta, of which twenty had been recently
described by him from material collected in various parts of the
United States and in Alaska. The key includes thirty two native
species and seven european. The species fuscofasciata Malloch is
in my opinion the true winthemi of Wiedemann, and Malloch’s
records of winthemi as well as those in many recent faunal lists
refer to another species that I have recently renamed mallocht.

Cole and Lovett?! in their catalogue of Oregon diptera refer only
to three species of Pegomyia known to occur within the State.
‘Huckett” recorded twenty species in the genus from New York,
including the western forms vanduzeet and acutipennis. The
former had been recently studied by Frost” as a leaf-miner of dock
under the name affinis Stein. Johnson: * gave a list of eighteen
species of Pegomyia in his faunal records for New England, and
thirteen as occurring in the Mount Desert Region, including five
species which had been originally described from that area by
Malloch. Leonard** in 1928 recorded twenty two species in the
genus in a list of insects for New York. The faunal pattern closely
follows that given by Johnson for New England.

Séguy?? in The Genera Insectorum, on the Muscidae of the
World lists forty four nominal species under Pegomyia that occur
in North America, and one is doubtfully included. The species

20 Malloch, J. R. A synopsis of the North American species of the genus Pegomyia
Robineau-Desvoidy (Diptera, Anthomyiidae). Bull. Brooklyn Ent. Soc., XV, pp. 121I-
127, 1920.

21 Cole, F. R. and A. L. Lovett. An annotated list of the Diptera. (Flies) of Oregon.
Proc. Cal. Acad. Sci., X1, Pp. 313, 1921.

2 Huckett, H. C. A systematic study of the Anthomyiinae of New York, with
especial reference to the male and female genitalia. N. Y. (Cornell) Agric. Exp. Station,
Mem. 77, pp. 40-48, (1923), 1924.

23 Frost, S. W. Two species of Pegomyia mining the leaves of dock. Journ. Agr.
Research, XV1, pp. 229-243, 1919.

24 Johnson, C. W. Fauna of New England, xv. List of the diptera or two-winged
flies. Occ. Pap. Boston Soc. Nat. Hist., vil, pp. 232-233, 1925.

2 Johnson, C. W. Biological Survey of the Mount Desert Region, part I, pp. 209—
210, 1927.

26 Leonard, M. D. A list of the insects of New York, with a list of the spiders and
certain other allied groups. NN. Y. (Cornell) Agr. Exp. Station, Mem. 101, pp. 840-841,
(1926), 1928.

27 Séguy, E. Genera Insectorum, Fasc. 205, pp. 48-67, 1937.

MEM. AMER. ENT. SOC., IO

I2 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

flavipes, stlemba and virginea I have yet to recognize as occurring
in this region; the species nztidula, setigera, trilineata, I consider as
belonging to Hylemyia. The latter genus as treated by Séguy
contains the records of such North American species as dissecta,
glabra, juvenilis, latipalpis, nigroscutellata, pedestris and rubivora,
all of which I have included in my treatment of the genus Pego-
myta. There are eleven North American species of Pegomyza in-
cluded inadvertently in the genus Pogonomyia Rondani, namely
emmesia, fringilla, fuscofasciata, labradorensis, luteola, quadri-
spinosa, spinigerella, subgrisea, triseta, unguiculata, and untcolor.
Huckett?® has recently published the names of thirty one new or
little known pegomyian species from North America, one of which
is recognized as occurring also in Sweden.

The present study records the occurrence of ninety seven species
of Pegomyia sens.-lat. in North America, of which sixty nine are
recognized as native species, twenty seven as having first been
described from Europe and one from Siberia.

Key to Groups

1. Arista with hairs longer than setulae on second antennal segment........... 2
Arista nearly bare or with hairs not longer than setulae on second antennal
SESITIENE + & busn.cticuat ) eee ge ee oe oie ee ee eee 3

2. Apical setulae of scutellum hairlike, cruciate bristles present, processes padded
with setulae on proximal half of inner border, caudal pair of ocellar bristles in
female short and directed forward...................... Virginea Group

Apical setulae of scutellum coarser developed than hairs on ventral surface,
cruciates absent or weakly developed, processes not padded with setulae,
caudal pair of ocellar bristles in female longish and directed outwards......
Bee ME eT Re oe aE 8 OG cn ok ie AOS thon we's ole Connexa Group

3. Scutellum with three pairs of strong bristles, mesopleura with a few setulae on
declivity dorsad of mesothoracic spiracle, posterior notopleural bristle with
afew. setulae at base sci. dnc, cca satan tee oe ee Major Group

Scutellum with two pairs of strong bristles, mesopleura with no setulae on
declivity dorsad of mesothoracic spiracle, posterior notopleural bristle with
no:.setulde at: bases 2 20% 2.30 Rhea oi nO PEE One OES Serene 4

Huckett, H. C.. Descriptions of new North American Anthomyiidae belonging to
the genus Pegomyia Rob.-Desv. (Diptera). Trans. Amer. Ent. Soc., LXV, pp. I-37, 1939.

H. C. HUCKETT 1g

. Costal thorn stoutly developed, costal setulae coarsely developed, at least in
female, abdomen in male cylindrico-conical, hypopygium and copulatory
appendages structurally similar to those of ipsia, m—cu cross vein invariably
oblique and sinuate, if not, prealar bristle absent or long and robust...... 5

Costal thorn and setulae inconspicuously and finely developed, abdomen in
male usually depressed, hypopygium and copulatory appendages structurally
_ not similar to those of lzpsia, m-cu cross vein frequently nearly straight and
erect, if oblique prealar bristle is present and shorter than length of anterior
MOtOp] eurcalyb rast] ppm ee le es oases si sea ae seieenseeh eeuewe arene oer see waneuae 6

. Prealar bristle absent, second or lower posthumeral bristle absent, basal node

of veins R.o+3 and R.s+5 usually with a few hairs on under surface Affinis Group
Prealar bristle present, long, second or lower posthumeral bristle usually present,
basal node of veins R.o+3 and R.gs bare..............--000- Lipsia Group

. Apical setulae of scutellum hairlike, fifth sternum in male armed and shaped as
in dissecta (fig. 61), apical anterodorsal bristle of hind tibia proportionately
short, cruciate bristles present....................0..00- Dissecta Group

Apical setulae of scutellum coarser developed than hairs on ventral surface, or
sometimes entirely absent, fifth sternum in male not armed nor shaped as in
USSCCLO PTT ee TMT TE TR oon Pack eS Sco. ae da AO cue haat ace uta rare a

. Male with numerous stout bristles on prebasal sclerite of hypopygium, female
with caudal sclerites of ovipositor strongly chitinized and polished, appressed
corsovemtrally memes cots Se ne aie 0 hs so cl sien ts ane Rubivora Group

Male with no bristles present on prebasal sclerite of hypopygium, female with
caudal sclerites of ovipositor nct noticeably appressed dorsoventrally, if
apparently so, not extensively nor strongly chitinized................... 8

. Head with parafacials, parafrontals and cheeks extensively molded, as in
hyoscyami, lower portion of occiput swollen, hind femur in male with bristles
forming anterodorsal series not sharply differentiated into a proximal series
of finer and shorter bristles and a distal series of stouter and longer bristles,
Ovipositor short, broadly conical, sclerites weak on dorsal surface and ex-
tensively setulose on ventral surface, segments concolorous with abdomen.
DB VOakceo ste) CPN Case GHRSST ORG CRETE Re ee eT EEC OO ROC EVP aA Hyoscyami Group

Head with parafacials and parafrontals repressed and narrow, cheeks restricted
and foreshortened caudad owing to the advanced position of the postgenal
margin, e, g., winthemi, geniculata, lower portion of occiput not swollen, hind
femur in male with bristles forming anterodorsal series much weaker and
more closely set on proximal than on distal half, ovipositor with segments
elongated and sclerites invariably slender and strongly chitinized, segments
not concolorous with abdomen......................... Flavipes Group

MEM. AMER. ENT. SOC., 10

I4 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Virginea Group

There are two species belonging to this group recorded from
North America, namely palposa Stein and juvenilis Stein. They
would undoubtedly fall within the concept of Pegomyza of authors.
The group is delimited by a combination of the following charac-
ters; Arista plumose, apical setulae of scutellum hairlike, cruciate
bristles present, palpi flattish and broadened, processes of fifth
abdominal sternum in male padded with setulae, basal sclerites of
hypopygium polished, caudal pair of ocellar bristles in female
short and directed cephalad.

Connexa Group

The species connexa Stein has usually been associated with
juventlts on account of plumosity of arista, thoracic markings and
highly shining hypopygium in male. There are however a number
of characters in which the two species differ, that serve to em-
phasize the artificiality of such a relationship. I am of the opinion
that connexa and the european species socculata Zetterstedt belong
to the same group. For diagnostic purposes both species may be
described as having the arista subplumose, cruciate bristles absent,
palpi slender, hypopygium and processes as in male of connexa,
hypopygium highly shining, hind tibia in male with a short
bristle on proximal half of posterior surface, female having discal
bristles on fifth abdominal tergum and caudal pair of ocellar
bristles longish and directed outward.

Major Group

The species belonging to this segregate are closely linked to the
lipsia-group. They have been included in the North American
genus Eremomyia by Stein. I am doubtful whether this genus can
be maintained apart from Hylemyia, and have in this instance
relegated the species with two antero- and two posterodorsal
bristles on hind tibia to the genus Pegomyia sens.-lat. The group
possesses the following combination of characters as found in
major; Hind tibia with two antero- and two posterodorsal bristles

H. C. HUCKETT 15

and a robust apical anterior bristle, scutellum with three pairs of
strong bristles, wings with robust costal thorn and strongly oblique,
sinuate m—cu cross vein, mesopleura with a few setulae on the
declivity dorsad of mesothoracic spiracle and with the stigmatal
bristles below spiracle largely devoid of accessory setulae, except
in thrixia, posterior notopleural bristle with a few setulae at base,
vibrissal angles armed with numerous (10-16) coarse black setulae,
cruciate bristles absent, hypopygium and copulatory appendages
of male as in /zpsia, female with caudal pair of ocellar bristles long
and directed outwards, marginal bristles of abdomen weakly de-
veloped. Species belonging to this group are major (Malloch),
aincompleta (Stein), thrixia Huckett, assimilis Huckett.

Lipsia Group

The group contains a large number of North American species
belonging to the genus Pegomyia. One of the commonest forms is
P. lipsia (Walker), which may be regarded as typical of the group.
These species may be defined as having the abdomen of male
cylindrico-conical, with hypopygium and copulatory appendages
similar to those of ipsia. The abdomen in both sexes has the
bristles stoutly developed on dorsum and vestiture comparatively
short and uniform, the bristles of legs are strongly developed, hind
tibiae are armed on antero- and posterodorsal surfaces respectively
with usually only two long bristles exclusive of the apical bristles,
wings possess a robust costal thorn and an oblique and markedly
sinuate m—cu cross vein, cruciate bristles absent, caudal pair of
ocellar bristles longish in female, erect and directed outward. The
segregate is closely allied to the major-group, differing in that the
species have no setulae on mesopleural declivity dorsad of meso-
thoracic spiracle nor at base of posterior notopleural bristle. The
group includes the following species: lipsia (Walker), lavidiventris
Huckett, chrysida Huckett, tarsata (van der Wulp), cresca Huckett,
duplicata (Malloch), longimana (Pokorny), setiformis Huckett,
fuscicauda Huckett, apicalis (Stein), costalis (Stein), flavicans
(Stein), substriatella (Malloch), quadrispinosa (Malloch), frigida
(Zetterstedt), banffi Huckett, anorufa Stein, labradorensis Malloch,
partita Huckett, caduca Huckett. It is possible that the last six

MEM. AMER. ENT. SOC., IO

16 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

species and the european form semirufa Ringdahl may be entitled
to separate group recognition. In general the male abdomen of
the latter six species is more depressed and the m-—cu cross vein is
only slightly oblique and sinuate.

A ffiinis Group

The common North American species Pegomyia affinis Stein
serves as a typical example of a small group that is known to have
habits peculiarly different to those of flies belonging to other
segregates within the genus. Adults of affinis may usually be
found in the vicinity of rodent’s burrows.2° Malloch®* has reported
having captured spinigerella in dry sandy places frequented by
burrowing bees. From rearings it is known that larvae of gopheri
feed on the excrement found in the burrows of land turtles, Go-
pherus polyphemus.*! Characters pertaining to the abdomen and
legs of the adult fly have much in common with those of lzpsia-
group. In the male the abdomen is cylindrico-conical and hypo-
pygial sclerites conform to the tapering outline of the caudal seg-
ments, processes are simple, unarmed, with a few bristles along
outer border, inner border with a few scattered setulae, marginal
bristles on terga are robust on dorsum and vestiture of setulae is
short and appressed, costal thorn is typically robust and costal
setulae coarsely developed in female, in many species the basal
node of veins R..., and R.., has a few hairs on under surface,
cross veins clouded and m-cu cross vein slightly oblique and sinu-
ate, abdomen not infrequently variegated or partly yellowish in
color, prealar and second posthumeral bristles absent, acrostical
bristles setulose, closely biserial, and third antennal segment near-
ly as broad as long. Species included in this group are affinis
Stein, finitima Stein, gophert Johnson, spinosissima Stein, spint-
gerella Malloch.

2 Curran, C. H. Note on Pegomyia affinis Stein (Diptera, Muscidae). Can. Ent.,
LVIII, p. 256, 1926.

30 Malloch, J. R. Descriptions of new North American Anthomyiidae (Diptera).
Trans. Amer. Ent. Soc., XLVI, p. 179, 1920.

31 Johnson, C. W. Insects of Florida. I. Diptera. Bull. Amer. Mus. Nat. Hist.,

XXXII, pp. 77-78, 1913.

H. C. HUCKETT : 17

Dissecta Group

The group is represented by nine species, of which dissecta
(Meigen) is typical. It may be described as possessing the follow-
ing combination of characters, which although variable may be
regarded as sufficiently characteristic of the group to be of some
value for diagnostic purposes: Apical setulae of scutellum hairlike,
conforming in structure to the ventral hairs, palpi flattish, cruciate
bristles present in both sexes, apical anterodorsal bristle of hind
tibia proportionately short, m—cu cross vein erect, lower surface of
costa adjacent costal cell (2C.) nearly devoid of setulae, wings in
male pointed apicad, processes of fifth abdominal sternum armed
and shaped as in dissecta, eyes in male closely approximated at
narrowest part of frons, with a pair of parafrontal setulae present
near anterior ocellus. The following species are known to occur in
North America, a) tibiae black, dissecta (Meigen), pseudodissecta
(Ringdahl), nigroscutellata (Stein), latipalpis (Stein), cuticornis
Huckett, b) tibiae yellow, acutipennis Malloch, abnormis Stein,
anabnormts Huckett, rectifrons Huckett.

Rubivora Group

The species associated with rubivora and dissecta have been
placed in Phorbia and Chortophila respectively by many authors
owing evidently to their black legs and subnude arista. It is ap-
parent from an examination of North American material that there
are species related to rubivora and dissecta that have yellowish
tibiae, and which may be included in the respective groups on the
basis of characters pertaining to the hypopygium, copulatory
appendages and ovipositor. In the males of the rubivora-group the
processes are subshining and lined along inner margin by a series
of setulae, the prebasal sclerite is well bristled, in the female the
caudal sclerites of ovipositor are shiney and strongly chitinized,
being appressed dorsoventrally. The darker colored forms of the
group may be further distinguished from species belonging to the
dissecta-group by the proportionately greater size of third antennal
segment, coarser development of apical setulae on scutellum,
denser hairs on under surface of costa, absence of cruciate bristles

MEM. AMER. ENT. SOC., 10

18 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

in male and their absence or weak development in female. Further
in the female the caudal pair of ocellar bristles is not long and is
directed cephalad, and the fifth tergum has comparatively stronger
discal and marginal bristles than in females of dissecta-group.
The paler forms of the rubtvora-group exhibit certain affinities to
triseta and related forms in hyoscyami-group, from which they
differ basically on account of abdominal characters as defined
above. The species are as follows: a) tibiae black, rubivora
(Coquillett), b) tibiae yellowish, glabra (Stein), cedrica Huckett.
To these may also be added the european forms Chortophila
dentiens Pandellé and C. rubricola Enderlein.

Hyoscyami Group

This is a large rather heterogeneous group consisting mostly of
species known to mine the leaves of vegetation, e. g., hyoscyami,
vanduzeet, bicolor, nigritarsis, albimargo. ‘These five typical species
are characterized by having the parafrontals and parafacials full
and prominent in profile, cheeks invariably broadly maintained
caudad, ventral half of occiput swollen, arista subnude, cruciate
bristles absent, abdomen in male slightly depressed, basal sclerite
of hypopygium proportionately robust, giving the abdomen a
truncated appearance, anal sclerite (ninth tergum) broadly round-
ed when viewed from above, gonostyli (inferior forceps) short,
broad, deeply fissured and incised, processes weakly bristled, ovi-
positor short, broadly conical, dorsal sclerites weakly chitinized
and ventral sclerites minutely setulose, segments concolorous with
abdomen, anterodorsal bristles of hind femur in male not sharply
differentiated into a proximal series of finer and shorter bristles
and a distal series of stouter and longer bristles, nor is the series of
posterior setulae on hind femur so extensively developed apicad
as in the flavipes-group, wings with costal thorn and setulae weakly
developed, m—cu cross vein semierect and nearly straight, caudal
pair of ocellar bristles short and directed cephalad in female.

Hyoscyamt Subgroup.—Processes frequently shiny and bare
apicad, antennae proportionately short, face and oral margin con-
stricted, ventral region of occiput swollen, prealar bristle weak or
absent, ventral bristle of caudal pair of sternopleural bristles fre-

H. C. HUCKETT 19

quently short in female, mesonotum not quadrivittate in male.
Species include hyoscyami (Panzer), carduorum Huckett, striata
Stein, 7adicta Huckett, atlantis Huckett, convergens Huckett,
ruficeps Stein, rufescens Stein, minuta Malloch, cognata Stein,
vicaria Huckett, marginata Huckett.

Vanduzeer Subgroupb.—Processes with a tuftlike series of setulae
at base and at apex on inner margin, widely spaced apart at base,
arista swollen at base, prealar bristle longer than in hyoscyami- or
albtmargo-subgroups, ventral half of occiput swollen, ventral bristle
of caudal pair of sternopleural bristles moderately long in female.
‘Species include, vanduzeet Malloch, haemorrhoa (Fallén), and the
european form versicolor (Fallén).

Albimargo Subgroup.—Processes bare distad, with fine setulae
restricted to basal area, apex of inner margin produced, antero-
dorsal series of bristles and posterior series of setulae on hind femur
of male more markedly differentiated and extended respectively
than in allied subgroups, presutural acrostical bristles well de-
veloped, mesonotum in male with four linear markings when
viewed from behind, situated in the planes between acrostical and
dorsocentral, and dorsocentral and intraalar series of bristles re-
spectively, arista not swollen at base, abdomen more distinctly
depressed in male. Species include flavifrons (Walker), sitiens
Huckett, albimargo (Pandellé) and the european form esuriens
(Meigen).

Bicolor Subgroup.—Processes restricted, bare and rounded
distad, with setulae confined to basal region and in a sparse series
along inner margin, hind femur stoutly bristled, presutural acros-
tical bristles weakly developed, in two adjacent series, in female
the ventral sternopleural bristle of caudal pair is well developed
and frontal vitta proportionately narrower than in female of
allied subgroups. Species include bicolor (Wiedemann), jacobi
Malloch, triseta Malloch, setarza (Meigen), variegata Huckett.

Nigritarsts Subgroup.—cClosely allied to bicolor-subgroup, dif-
fering in that the processes are broad laminate plates with a dense
series of setae along inner margin. Species include nigritarsis
(Zetterstedt) and rumictfoliae nom. nov. (p. 81).

MEM. AMER. ENT. SOC., IO

20 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Flavipes Group

This group consists of three smaller segregates which may be
distinguished from one another by the structure and bristling of
the processes in male sex, as represented in gilva (Zetterstedt),
geniculata (Bouché) and intersecta (Meigen) respectively. The
group characters are most evident in the male, where they may be
described as follows: Abdomen depressed, with lateral margins
subparallel and terga clothed with longish erect setulae, abdominal
vitta if present composed of lineal sections, hind femur with bristles
forming anterodorsal series much weaker and more closely set on
proximal than on distal half, posterior surface with median series
of fine setulae extending distad to preapical bristle, head with
parafrontals, parafacials and cheeks reduced to slender and narrow
proportions, eyes nearly contiguous at narrowest part of frons,
oral margin between vibrissae not constricted, ventral region of
occiput not buccate nor swollen, antennae moderate to large,
wings pointed apicad, costa slender and with setulae and thorns
weakly developed, m—cu cross vein slightly to moderately oblique,
Ovipositor with sclerites invariably strongly chitinized and seg-
ments elongated. _

Flavipes Subgroup.—Hypopygium considerably enlarged by the
angular broadening of the ninth tergum caudad (ventrad), par-
ticularly in the region of gonostyli and cerci, fifth sternum com-
posed of a large basal plate from which the processes extend as
slender pliant lamellae, the latter bear a series of prominent
bristles which often appear flaccid, the series extends from base to
near apex, otherwise the fifth sternum is largely devoid of bristles,
processes are markedly constricted at junction with basal plate
through the intrusion of the outer conjunctival membrane, in
many of the species the caudal sclerites of ovipositor are rigid and
compressed as if for piercing, and marginal bristles of fifth tergum
in female are robustly developed laterad. Species are gélva
(Zetterstedt), pilosa Stein, tenera (Zetterstedt), incisiva Stein,
rufipes (Fallén), vittigera (Zetterstedt).

Geniculata Subgroup.—Hypopygium and processes inconspicu-
ous, the latter clothed with numerous short bristles throughout,

H. C. HUCKETT 21

acrosticals in two widely separated series, antennae large. Species
are geniculata (Bouché), univittata (von Roser), unicolor Stein,
winthemt (Meigen), mallocht Huckett, rufina (Fallén), flavipalpis
(Zetterstedt), corrupta Huckett, pollinosa Ringdahl, longicornis
Huckett.

Intersecta Subgroup.—Abdomen in male tapering caudad, hypo-
pygium subshining, ninth tergum angular and protruded, armed
dorsad (cephalad) with a few weak bristles, basal sclerite polished,
processes horney, bare and laminate, cruciate bristles present in
both sexes. Species are intersecta (Meigen), unguzculata Malloch,
tacta Huckett, solitaria Stein.

The following species have not been associated with any group,
alticola Huckett, analis Schnabl, caesia Stein, littoralis Malloch,
lunatifrons (Zetterstedt), marginata Huckett, palpata Stein, tinc-
tusquama Huckett.

Key to Species of Pegomyia

Males
I. Legs entirely black, at most knees yellowish tinged..................... 2
Legs at least partly yellowish, occasionally tibiae fuscous...............18
2. Mid tibia with a mid ventral or anteroventral bristle.................... 3
Mid tibia with no mid ventral or anteroventral bristle................... 5

3. Antennae separated by a prominent rounded facial elevation, basal hairs on
outer margin of calyptrae blackish tinged, apical setulae of scutellum hair-

like as those on ventral surface, propleura with a few hairs near center... .

BLESS B20 Bec a gh Bea EE Ee ore rR Se crene Maeee cere eter ea Paregle aestiva (Meigen)
Antennae not separated by a prominent rounded facial elevation, basal hairs
on outer margin of calyptrae not blackish tinged, apical setulae of scutellum
coarser developed than hairs on ventral surface, propleura bare........ 4

4. Prealar bristle short, second antennal segment with a small wartlike tubercle
on dorsal surface, oral margin protruded cephalad, hind femur with no
bristles on posteroventral surface.............. Paregle cinerella (Fallén)
Prealar bristle long, second antennal segment with no wartlike tubercle on
dorsal surface, oral margin not protruded cephalad, hind femur with
bristles on posteroventral surface......................-. analis Schnabl

. Arista plumose, processes with mattlike pad of setulae on inner border, lower
calyptral scale extensively protruded beyond margin of upper, prealar
bristle not shorter than length of anterior notopleural bristle. palposa (Stein)

On

MEM. AMER. ENT. SOC., 10

22 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Arista short pubescent or bare, processes with no mattlike pad of setulae
along inner border, lower calyptral scale not extensively protruded beyond
margin of upper scale, prealar bristle shorter than anterior notopleural
[oy g (15 (remem i aunte Ata ser eee Oe ING Mceerete Ote MELE DRS Gaal Dis oko oo 0.0 6 6

6. Hypopygium shining black, processes devoid of bristles and are extended as
thin chitinous plates (as in wnguiculata) which are prolonged at apex into

an accessory digitlike appendage (fig. 55)............ miersecta (Meigen)
Hypopygium not polished black, processes with a few setulae and not term-
inating in an accessory appendage. ...............0.0.0ceepsesesaees 7

7. Head with inner pair of vertical bristles erect and bristlelike, frontal vitta
ribbandlike throughout its length to ocellar callosity, velvety black,
cruciate setae longish, hind tibia with apical posterodorsal bristle well
developed, as long as apical dorsal bristle.............. littoralis Malloch

Head with inner pair of vertical bristles setulose, cruciates weak or absent,
frontal vitta largely constricted or obliterated caudad by parafrontals, hind
tibia seldom with apical posterodorsal bristle as long as apical dorsal bristle 8

8. Apical setulae of scutellum hairlike as those on ventral surface, hind tibia with
apical anterodorsal bristle short, not longer than height of hind metatarsus,
processes like those of dissecta (fig. 61)... 0... cece ce eee eens 9

Apical setulae of scutellum coarser developed than ventral hairs, hind tibia
with apical anterodorsal bristle invariably slightly longer than height of
hind metatarsus, processes not like those of dissecfa.................. 13

g. Cheek as high as width of third antennal segment, margin of eye scarcely
reaching a level below the vibrissae, ventral border of cheek with a coarse
series of setulae and slender bristles...............6...00-0 000 e eeu 10

Cheek narrower than width of third antennal segment, margin of eye extend-
ing ventrad of level with oral vibrissae, cheeks with a single series of bristles
along ventral" border e 2c ee ee ne Be eee eee ares II

10. Cross vein m-cu oblique, ultimate section of M.1+2 shorter than 1.5 times
length of penultimate section, anterior sternopleural bristle as robust in
development as ventral bristle of caudal pair, hind femur with bristles on
distal half of anteroventral surface longer than those on proximal half......
Bee eee ye eat erst th tus otiranih scsi dean 6 acute O.did-e8c cuticornis Huckett

Cross vein m-cu erect, ultimate section of M.142 fully as long as 1.5 times
length of penultimate section, anterior sternopleural bristle slightly finer
developed than ventral bristle of caudal pair, hind femur with a series of
uniformly long bristles throughout anteroventral and proximal half of
posteroventral surfaces...................008- pseudodissecta (Ringdahl)

11. Anterior sternopleural bristle finer developed than ventral bristle of caudal
pair, occipital setulae on ventrocentral plane adjacent oral margin stiff and

1G

14.

15.

16.

17h

H. C. HUCKETT 23

spinulose, postsutural area of mesonotum when viewed from behind with
three broad vittae which are continued to base of scutellum............
ee C/A PEON Per au Si CIE EN SRY AIRS geet Dor pee 3 dissecta (Meigen)
Anterior sternopleural bristle as robust as ventral bristle of caudal pair,
occipital setulae on ventrocentral plane slender, postsutural area of meso-
notum with lateral vittae at least obscure or obliterated before reaching
asexolescutellluimaegy. teste eases ACs cates Riis 6% wis te RA Se NL Se 12

. Stigmatal bristles below mesothoracic spiracle with five or six setulae at base,

mesonotum brownish black, under surface of costa bordering costal cell
(QC) WAR Fehon g plows ceaccon a rote Ree ea eee latipalpis (Stein)
Stigmatal bristles seldom with more than one or two setulae at base, meso-
notum grayish black, under surface of costa bordering costal cell has a few
SCCUlACH RE a oA Se AUR ae awa he nigroscutellata (Stein)
Prebasal sclerite of hypopygium prominent and bristled, eyes separated by a
distance not less than that between posterior ocelli inclusive.......... 14
Prebasal sclerite concealed and bare, eyes seldom separated by a distance as
great as that between posterior ocelli................00 cece ee eeeee 15
Parafacials narrower than breadth of third antennal segment, processes
truncated at apex, inner margin fringed with a continuous series of setulae
F ih 9 0:0 :4.4 ONO ASN HES BLO LO OE ETRE ET ae ae rubivora (Coquillett)
Parafacials fully as broad as width of third antennal segment, processes
_ tapering apicad, inner margin with a partial series of setulae, becoming
discontinueddbasadhrnarnccaaemine sacs eosin aa tat weeint glabra (Stein)
Mesonotum, viewed from behind, with four short postsutural stripes, situated
respectively between the series of acrostical and dorsocentral, dorsccentral

andsintradlambnristlesm ene een en ore aee ae ae flavifrons (Walker)
Mesonotal stripes, if present, situated between the series of acrostical bristles
orintthe planesofthesmacrochaetae...- ..--.2-05-0c0asssse soe ss oe 16

Processes widely separated at base by the basal plate, tufted with setulae at
base and at apex as in vanduzeez (fig. 63), cerci broadly yellowish........
& 5 0 Slot op a oto HRS Reals CHAT Nero a SE ee Macc ne haemorrhoa (Zetterstedt)
Processes nearly contiguous basad, apical region not tufted with setulae,
Cencignotibroad|lyyellowishtysa-acy ci. oie ee oes = orice ree As ane = tne 17
Middle pair of presutural acrostical bristles closer to one another than to
their respective series of dorsocentral bristles, with no setulae between the
series, calyptrae with brownish hairs and margin, processes sparsely
SEU OSE a eee yn teehee ee ese AI, ces nee nematese fumipennis Huckett
Series of presutural acrostical bristles not closer to one another than to their
respective series of dorsocentral bristles, with setulae between the series,
calyptrae with pale hairs and margin, processes with a dense series of
marginal setulae proximad......................06. longicornis Huckett

MEM. AMER. ENT. SOC., 10

24

18.

19.

20.

21.

23%

24.

25,

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

All femora largely and uniformly infuscated, sometimes mid and hind pairs

slightly ‘paler than:fore* pair: 2¢ 052) Hage S eet eee eee eos 19
All femora largely yellowish, or first pair more or less infuscated, second and
third pairs largely yellowish or at most tinged superficially............ 48
Prealar bristle as long as or longer than anterior notopleural bristle... ... 20
Prealar bristle shorter than anterior notopleural bristle, or absent........ 26

Posterior notopleural bristle with a few setulae at base, mesopleura with a few
hairs on declivity dorsad of mesothoracic spiracle, hind tibia with apical
anterior bristle strongly developed, vibrissal area with numerous (10-16)
coarse: black setulae. 35 .:.ietse yee ra op hao eco es ee 21

Posterior notopleural bristle with no setulae at base, mesopleura devoid of
hairs on declivity dorsad of mesothoracic spiracle, hind tibia with apical
anterior bristle weakly developed or absent, vibrissal area with a few

slender setulae wo Sac. We auc aigrta ee iets re ree om ts rs a ene 24
Second antennal segment extensively reddish yellow........ major (Malloch)
Second antennal segment extensively blackish......................... 22

. Mid femur with no bristle on distal half of anteroventral surface, mid and

hind femora broadly reddish suffused throughout distal third, eyes separated
by a distance not greater than maximum width of frontal vitta cephalad
EM de rt, Ama ce es Pee eA Stns oy SO ts GSC a Eas Oe oS assimilis Huckett
Mid femur with a bristle on distal half of anteroventral surface, mid and hind
femora narrowly reddish distad, eyes separated by a distance slightly
greater than maximum width of frontal vitta cephalad............... 23
Parafrontals with a few setulae opposite ocellar callosity, mid and hind
femora with short posteroventral bristles, which are not longer than maxi-
mum breadth of femur, abdominal sterna 3 and 4 with sparsely arranged
bristles, hypopygium not notably large, abdomen tapering caudad........
Bee er ee ees Care etic .o hn Hod cha ore ee wae aro obo OS thrixia Huckett
Parafrontals with no setulae opposite ocellar callosity, mid and hind femora
with many posteroventral bristles longer than maximum breadth of femur,
abdominal sterna 3 and 4 with bristles densely arranged on caudal half,
cephalic half being bare, hypopygium large, abdomen well maintained
CAUdAG ais sh Santina ee ee ee eee incompleta (Stein)
Mid femur with a bristle on distal half of anteroventral surface, fore tibia
with apical posterodorsal bristle robust, eyes separated by a distance equal
to width of third antennal segment..................... apicalis (Stein)
Mid femur with no bristle on distal half of anteroventral surface, fore tibia
with apical posterodorsal bristle setulose or weakly developed, eyes sepa-
rated by a distance less than breadth of third antennal segment... ....25
Abdomen conical, hypopygium black and shining, processes like those of
lipsia (fig. 78), m-—cu cross vein oblique and sinuate, presutural acrostical

26.

27.

28.

29.

30.

Bite

H. C. HUCKETT 25

bristles in two well separated series, with setulae between the series. ...
5 fb 23-3! GR sttcs omar os Ro Oona) OEE nOT eo cree ec ROR ecme tone peer enter tae fuscicauda Huckett
Abdomen depressed, hypopygium pruinescent and concolorous with terga,
processes like those of vanduzeer (fig. 63), mci cross vein erect, presutural
acrostical bristles in two closely adjacent series, with no setulae between
SERIES ECs ree sete bl den eu a aa haemorrhoa (Zetterstedt)
Costal thorn robust and prominent, cross veins usually clouded, basal node
of veins R.o+3 and R.s+5 usually with a few hairs on under surface.... ..27
Costal thorn short and inconspicuous, cross veins usually clear, base of veins
Ro+3 and R.g+5 bare on under surface... ........0 0.0. e eee eee eee 28
Third antennal segment yellowish proximad, apical posterodorsal bristle of
fore and hind tibiae robust, mid femur with a strong bristle on distal half
of anteroventral surface, costal setulae strongly developed, as long as
postocularsetulaers . seeeiciowsiwiask Sos oe A ose Mae spinigerella Malloch
Third antennal segment blackish, apical posterodorsal bristle of fore and hind
tibiae invariably setulose or weakly developed, mid femur with no bristle
on distal half of anteroventral surface, costal setulae in no prominently
SUOMPwe SEH CS Paar tem i apeta ste ccna eho. aoe eos acrehon eee oie eos afinis Stein
Parafacials in profile narrow, at base of antennae not broader than one fifth
diameter of eye measured at a point immediately caudad, frontal vitta
restricted, shortest distance between vibrissa and eye margin much shorter
. than length of third antennal segment, eye margin extending caudoventrad
to almost coincide with postgenal margin, thereby restricting the genal
sclerite caudad, occipital region not swollen, e. g., geniculata (fig. 94). . .29
Parafacials in profile and from above prominent and extensive, at base of
antennae as wide as one fourth diameter of eye measured at a point im-
mediately caudad, frontal vitta extensive, shortest distance between
vibrissa and eye margin nearly equal to length of third antennal segment,
cheeks well maintained caudad, extending distinctly caudad of the lower
margin of eye, e. g., hyoscyamt (fig. 93)... 0.0... c cece ee eee eee ee 36
Apical setulae of scutellum hairlike, abdominal terga 3 to 5 with trace of
fuscous markings along cephalic border in addition to dorsocentral stripe,
sternum 5 with processes like those of dissecta..................4.0-. 30
Apical setulae of scutellum coarser developed than hairs on ventral surface,
or absent, abdominal terga 3 to 5 with no trace of fuscous markings along
cephalic border, processes not as in dissecta, with a fringe of fine slender

setulae along: inner margine sec soma: sens eo ores aetmeelae nice es 31
Ralpirentirelyablackish ese enee errno oeecneteence acuttipenmis Malloch
Palpilargely: yellow: Ae 1))tele tees che decade be Sea ere anabnormis Huckett

Hind femur with a series of ten or more black spinulose setulae on postero-
ventral surface, copulatory appendages and hypopygium like those of
TALVGR SAGO) eae ete cere see ey AN tn St Ale rufipes (Zetterstedt)

MEM. AMER. ENT. SOC., IO

26

Bo.

33-

34.

35.

36.

38.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Hind femur not armed with a series of spinulose setulae on posteroventral
surface, copulatory appendages and hypopygium not like those of gilva. .32
Abdomen slender, terga clothed throughout with slender erect bristles,
marginal series inconspicuous, costa bounding cells Sc. and R. becoming
notably much broader than the attenuated section bounding cell 2 C.....
she ha, Sieg a RENIN eet ke es lunatifrons (Zetterstedt)
Abdomen of normal robust proportions, terga with a conspicuous marginal
series of stout bristles, costal vein of normal and uniform breadth along
cells: Seq, sad bay swe cea RRS Ge ee Sn ere ee Be
Abdomen subfuscous, reddish with blackish incisures along caudal margin
of terga, scutellum obscurely reddish testaceous apicad, wings brownish
tinged! throughouts.4 4.6.2 eee ee eee corrupta Huckett
Abdomen and mesonotum concolorous, entirely grayish black, scutellum
entirely blackish, wings at most faintly smoky....................... 34
Third antennal segment about three times as long as second segment, apex
reaching a level with oral margin, series of presutural acrostical bristles
separated by a distance fully equal to that between the respective series of
acrostical and dorsocentral bristles, processes sharply tapering apicad....
cul Bilge A a ne en a SN, cee longicornis Huckett
Third antennal segment shorter than three times length of second segment,
apex not reaching a level with oral margin, series of presutural acrostical
bristles closer together than distance separating the respective series of
acrostical and dcrsocentral bristles, processes not sharply tapering on
S61) #71 WOE] Gera at Me GG Gaba ais autre wlan niga acia'a ecnotol 35
Mesonotum viewed from behind with four postsutural stripes, situated re-
spectively between the series of acrostical and dorsocentral bristles, and
between the dorsocentral and intraalar bristles, processes short, widely
spaced apart at base, apical region extended slightly at inner margin....
ee tee ca Peedi ene ce oe bicia. A tadbavo for o.oo aces flavifrons (Walker)
Mesonotum with no such postsutural stripes, processes longish, twice as long
as average width, approximated basad, apical region not produced at inner
META ys Ys ok PD ak eee ear aninotata Huckett
Prealar bristle absent, ym cross vein slightly infuscated, abdominal terga 4
and 5 with transverse series of discal bristles, proboscis slender cognata Stein
Prealar bristle present except in minula, r—m cross vein clear, abdominal
terga 4 and 5 with no transverse series of discal bristles.............. 37

. Third antennal segment yellowish at base.................---.ee000ee 38

Third antennal segment entirely blackish....................--..+-5-- 39
Third antennal segment with transverse pale area at base on inner side,
presenting the appearance of an overlapping scale, processes with a dense
series of setulae along inner border at base...............- ruficeps Stein
Third antennal segment with no marked indications of pale scalelike pattern
at base on inner side, processes with no dense series of setulae along inner
| L030 (2 ee Rea tnee nr Meee EIP EYED as eeSrenee ep Acute Bs i Luo ath Oner che ied wii rufescens Stein

39.

40.

4I.

42.

43.

44.

45.

46.

H. C, HUCKETT 27

Palpisyellowishvorineddishs..). 050.4 225.4. bao ds setae cea eee i aahew es 40
Palpi fuscous, at least at apex. .............0..00005 cee Bate aed oer PERC 41
Tarsi yellow, second antennal segment entirely yellow, mesonotum with no
markings, processes with no tuft of setulae at apex or at base, prealar
priStlevalySeritepew a ccetey i ic eres eyes dou dio sucyieuceusect eee Reem cReNewoNer minuta Malloch
Tarsi blackish, second antennal segment tinged with fuscous, mesonotum with
pronounced vittae along planes of dorsocentral bristles, processes with
tuftlike series of setulae at apex and at base, prealar bristle present......
5.6/6 0: Oo BiG. O10 GG OF. 0. POL ono CLI act ot tee IPE Pn ee nee ce eters vanduzeet Malloch
Second antennal segment entirely yellowish, vibrissae separated by a distance
less than height of cheek, processes grayish drab with a thickened polished

strip along distal half of inner margin................ convergens Huckett
Second antennal segment infuscated or brownish, vibrissae separated by a
distance greater than height of cheek..................0 0000 cece eeeee 42

Fore, mid and hind femora largely yellowish, with trace of fuscous permeating
the integument, coxae reddish, processes devoid of bristles, with only a few
sparse setulae, cerci and styli black and polished............ striata Stein

Fore, mid and hind femora decidedly and for the greater part infuscated or
blackish, processes with numerous bristles and setae, coxae blackish... .43

Mesonotum viewed from behind with four postsutural vittae, situated re-
spectively between planes of acrostical and dorsocentral, dorsocentral and
intraalar series of bristles, scutellum with a dark fascia along base......
0.6.0.0 6 Godiva che c {Ol Rae ATEee SC aee OR ree a a A et ee enters flavifrons (Walker)

Mesonotum with no such interserial stripes, if present they lie dorsocentral
or along the planes of dorsocentral and intraalar series of bristles, scutellum
with no dark fascia across base........... 000. e ee cece ete ees 44

Hind tibia with apical posterodorsal bristle strongly developed, mid tibia
with a weak mid anterior bristle near anterodorsal bristle, parafrontals
bristled for entire length, abdomen conical, processes as in bicolor (fig. 90)
0:65 100, GS Bea OSL ORCC Eee FTE a ERE MERC eM RAR re eM Pace jacobt Malloch

Hind tibia with apical posterodorsal bristle slender and weakly developed,
mid tibia with no weak anterior bristle, parafrontals not bristled for entire
length, abdomen depressed, processes not like those of bicolor.......... 45

Processes broadly produced throughout, widely truncated at apex, distal half
and inner border yellowish, polished and bare, mid and hind femora broadly
yellowish on apical region, extending to include preapical bristles, hind
tibia with four or more anterodorsal bristles............. indicta Huckett

Processes not truncated at apex but tapering distad, mid and hind femora
narrowly yellowish at apex, hind tibia with not more than three antero-
dorsallbnistlesivs peisisrs foreach ae aise ane isu eye ate eee sins Sick nce 46

Parafacials at base of antennae fully as wide as height of cheek, eyes separated
by a distance fully as great as that between posterior ocelli inclusive, pre-
basal sclerite with numerous bristles...................... glabra (Stein)

MEM. AMER. ENT. SOC., 10

28

47.

48.

49.

50.

SI.

52.

54.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Parafacials not wider than height of cheek, eyes separated by a distance less
than that between posterior ocelli inclusive, prebasal sclerite bare...... 47
Processes with a tuftlike series of setulae at apex as in vanduzeer (fig. 63),
proboscis polished and slender, postocular setulae fine and long, mesonotum
inconspicuously striped....................-5. haemorrhoa (Zetterstedt)
Processes devoid of setulae at apex, proboscis pollinose and short, postocular
setulae short and coarse, mesonotum with a conspicuous brownish dorso-

Central! vata dh: sheesh We ere ee ne atlanis Huckett
Prealar bristle long and robust, longer than or as long as anterior noto-
pleural bristle, if of about equal length abdomen black............... 49
Prealar bristle absent or shorter than length of anterior notopleural bristle,
if of about equal length abdomen reddish yellow..................... 71
Arista with hairs longer than setulae on second antennal segment, sparsely
distributed casa decdncine sco a eee 50
Arista with hairs scarcely longer than setulae on second antennal segment,
pubescenitittrent vidal oh ae Rinse cater. SERS ee ee 51

Processes with a matt of short stiff setulae on proximal half of inner border,
arista plumose, longest hairs as long as width of third antennal segment,
palpi spatulate, fore femora at base with a conspicuous well defined brownish
area on anterior (inner) surface, hind tibia with no posterior bristle on
proximal half syd R ie c the ee ean eo ea ee rte juvenilis (Stein)

Processes with no mattlike series of stiff setulae on proximal half of inner
border, arista subplumose, longest hairs not as long as width of third
antennal segment, palpi slender, fore femora at base of anterior (inner)
surface with no such well defined marking, hind tibia with a posterior
bristlejonsproximaluhalieeeee sree eer n reer rerere connexa Stein

Abdomen largely reddish yellow, or if mcre or less infuscated or blackened,
is not concolorous with thorax and the humeral callosities are also reddish 52

Abdomen and mesonotum, including humeral callosities, grayish black,
CONCO] GROWS hs ise sP eee Se es ee 56

Thorax largely reddish to yellowish, hind tibia with a short bristle on proximal
half of posterior surface, mid femur with a bristle on distal half of antero-
ventral surface.wia<cck 28k cst Sh ieee 53

Thorax largely blackish, hind tibia with no posterior bristle on proximal half,
mid femur with no anteroventral bristle on distal half................ 54

. Third antennal segment and palpi entirely blackish......... partita Huckett

Third antennal segment and palpi in part or wholly yellowish............
foPin ta hus Latah Behe eee CTO ION ee ae eco labradorensis Mallcch
Processes developed as broad platelike appendages, with a series of longish
black setae along inner margin from base to apex, second and third sterna
quadrate in outline, scutellum yellowish at apex...................-- 55
Processes not developed as broad platelike appendages, with longish setae
confined to apical region of inner margin, second and third abdominal

55:

56.

57-

58.

59.

60.

61.

62.

63.

H. C, HUCKETT 29

sterna elongate, narrow, scutellum entirely grayish black..............
Fick df DORE CE eens a oy 0 fy CARES OEE DoD OOS PRR Reece each lividiventris Huckett
Palpi yellow, third antennal segment yellowish at base.rumicifolae nom. nov.
Palpi fuscous, third antennal segment entirely blackish..................

O80 tre BG EEO LO CE CN ee eee SO eee pene ea ares oe nigritarsis (Zetterstedt)
First and seond antennal segments entirely yellowish or reddish, lunule
SOUON ISI 5 0-5-6 Bia. orien cok Octo Ca OR ARERR a ce CR IR ado, CCR Ooo er ee ee 57
Second antennal segment largely fuscous or blackish, reddish or yellowish
portion restricted to distal border.................0.0e cee eee eee cee 63

Both fore and hind tibiae with apical posterodorsal bristle well developed,
abdominal sterna 2 and 3 clothed with numerous longish bristles throughout

5 Src or F Peo ROR SOTO ERE EER OaEEG REECE RE EERO, aA IRCA os a fea me 58
Either fore or hind tibia, or both, with apical posterodorsal bristle setulose
orpiinelyadeveloped tris arse he ke Malice cme atin Sete eo mae epam ene ae ate 59

Costa with a series of prominently long setulae proximad and distad of
costal thorn, all longer than diameter of costa, the longest as long as r-m

cross vein, halteres yellowish................20.....0-05- costalis (Stein)
Costa with no series of longish setulae adjacent costal thorn, at most with
one longer setula, halteres purplish............... substriatella (Malloch)

Mid femur with a robust bristle on distal half of anteroventral surface, palpi
entirely yellow, mid femur with a series of short bristles throughout distal
. half of posteroventral surface, hind femur with two strong posteroventral
TIS TES meee ee ree GILES Aili. oink Sian a aes flavicans (Stein)
Mid femur with no robust bristle on distal half of anteroventral surface, palpi
fuscous on distal half or at tip, mid femur with no series of short bristles
throughout distal half of posteroventral surface, hind femur with one strong

posteroventrall bristles.) xtc aie bP mare diene eee ermene eeaelen Oats 60
Fore tibia with apical posterodorsal bristle well developed..............61
Fore tibia with apical posterodorsal bristle setulose.................... 62
Processes entirely yellowish, abdomen with a fine linear dorsocentral marking,

terga densely pollinose, wings yellowish tinged..... tarsata (van der Wulp)
Processes largely blackish, abdomen with a narrow dorsocentral vitta, wings

atumostfainthyismoky: i256 .08.0 50 cteanantae sem oe man ee cresca Huckett

Mesonotum viewed from behind with a prominent dark streak on each side,
second and third abdominal sterna subquadrate and densely clothed with
uniformly fine erect setulae, wings and calyptrae yellowish, cross veins
Clear Re eee. carla eeecc alguna aeRO Teast OCR RT Te ee lipsia (Walker)

Mesonotum with no prominent blackish streaks along declivities, second and
third abdominal sterna elongate and tapered caudad, clothed with sparse
appressed setulae, wings and calyptrae hyaline, not intensively yellowish

tinged, cross veins clouded................00..eeeeeeee chrysida Huckett
Mid femur with an anteroventral bristle on distal half, which is usually
Stoutivadevelopedittss am acre catia eheien meron ete aera ecrsed ie acieraereaa.: 64
Mid femur with no anteroventral bristle on distal half.................. 68

MEM. AMER. ENT. SOC., 10

30

64.

65.

66.

67.

68.

69.

70.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Hind tibia with a short bristle on proximal half of. posterior surface, fore

tibia with apical posterodorsal bristle absent or setulose... .banffi Huckett
Hind tibia with no short bristle on proximal half of posterior surface, fore
tibia with a robust apical posterodorsal bristle....................... 65

Eyes separated by a distance as great as width of third antennal segment,
frontal vitta uninterrupted as far as ocellar callosity, mid tibia with a short
anteroventral bristle at middle, penultimate section of vein M].1+2 as long as
distal section, m—cu cross vein sloping in a plane that if extended anteriorly
would intersect costa at the point of union with vein R.o+3............-. 66

Eyes separated by a distance less than breadth of third antennal segment,
parafrontals contiguous, interrupting frontal vitta, mid tibia with no
anteroventral bristle, penultimate section of vein M.s+2 slightly shorter
than distal section, m-cw cross vein sloping in a plane which if extended
anteriorly would intersect costa at a point distinctly proximad of that at
Union withevelti Rises Asiana: dee On Cee eee 7

Hypopygium and processes largely yellowish, fore femur with infuscation
along dorsal half only, costal setulae proximad of costal thorn in a prominent
erect series, the setulae longer than diameter of costa....... anorufa Stein

Hypopygium and processes largely blackish, fore femur with infuscation
throughout proximal half, costal setulae short and in an inconspicuous
SEPIGS NG heh ees Seca hee ee 3 ae: Serer ek quadrispinosa (Malloch)

Hypopygium shining and black, abdomen and thorax shiny, the latter with
conspicuous blackish streaks along declivities of mesonotum, calyptrae
intensively yellowish, wings yellowish tinged......... frigida (Zetterstedt)

Hypopygium grayish pruinescent, subshining, abdomen and thorax largely
opaque, not shiny or lustrous, mesonotum with no conspicuous streaks
along declivities, calyptrae and wings clear.............. caduca Huckett

Hypopygium blackish, subshining, not concolorous with the grayish abdominal
terga, basal sclerite of hypopygium with a number of short erect bristles,
scattered, and in no perceptible single series around the mesal puckered
areavonicaudaliborderc cee butane ae ae Ae ee neh emesis eee eee 69

Hypopygium grayish pollinose, opaque, concolorous with abdominal terga,
basal sclerite with bristles arranged in a semicircular series bordering the
mesal puckeredliareaicn.5 ih xs ohosues ae i ee ee 70

Fore and hind tibiae with a robust apical posterodorsal bristle, eyes separated
by distance equal to that between posterior ocelli, mid tibia with mid
anteroventral bristle -47ss90 5 dae ees eee setiformis Huckett

Hind tibia at least with apical posterodorsal bristle weakly developed, fore
tibia invariably with apical posterodorsal bristle setulose, eyes separated
by a distance less than that between posterior ocelli, mid tibia with no mid
anteroventral bristles ase cee eeeoeeeieeer fuscicauda Huckett

Cross veins clouded, fore tibia with usually a well developed apical postero-
dorsal bristle, mid femur frequently with a well developed bristle on proxi-
mal half of anteroventral surface................--. duplicata (Malloch)

74.

75:

H. C. HUCKETT 31

Cross veins not clouded, fore tibia with apical posterodorsal bristle setulose
or weakly developed, mid femur seldom with a bristle on proximal half of
anteroventral surface. ..............0.cn eee ee ces longimana (Pokorny)

. Hind tibia with a long strong bristle at middle of dorsal surface, and with no

posterodorsal bristles nor apical dorsal bristle............. solitaria Stein
Hind tibia with no bristle at middle of dorsal surface, but with two or more
posterodorsal bristles and with an apical dorsal bristle................ 72

. Eyes widely separated, distance equal io length of third antennal segment,

parafrontals at narrowest as wide as half breadth of third antennal segment,
processes similar to those of dissecita, hind coxae with a few hairs proximad
Onacalidallsunfacemen reece ae eres ke Shee lass muvoces abnormis Stein
Eyes separated by a distance not equal to length of third antennal segment,
parafrontals at narrowest less than half breadth of third antennal segment

. Hypopygium and processes polished and black, abdomen black, processes of

horny appearance, devoid of bristles, like those of intersecta (fig. 55)......
esta GAS Gia 8S crase keh dates as ete enna CERES Pa aa unguiculata Malloch
Hypopygium not polished, at most subshining and with at least trace of
pruinescence, processes confecrming in appearance to the basal plate of
fifth sternum, clothed with bristles and setulae, or, if hypopygium is
shining and processes horny and bare then abdomen is reddish and proc-
esses armed with a series of coarse setulae across apical border, ¢. f., tacia. .

Hind femur with a series of five to eight strong bristles on distal half of
anteroventral surface, which are abruptly much longer than the short
bristles on proximal half, and most of which are longer or fully as long as
those bristles comprising the anterodorsal series, bristles comprising the
proximal series on anteroventral surface shorter than those comprising the
proximal series on anterodorsal surface, hind tibia with noticeably long
setulae on anterior and anteroventral surfaces, fore femur with a series of
three or four long bristles on proximal half of posterior surface, longer than
those of posteroventral series............ 00.0 c cece eee eee pilosa Stein

Hind femur with bristles on anteroventral surface gradually becoming longer
distad, not sharply divided into longer and shorter bristles on distal and
proximal halves respectively, hind tibia with no longish setulae on anterior
or anteroventral surfaces, fore femur with at most one or two conspicu-

ously long strong bristles on proximal half of posterior surface........ 75
Lower calyptra widely protruded beyond margin of upper scale.......... 76
Lower calyptra subequal with upper scale, or more restricted in its extension

beyond margin of upper scale................00 cee eee eee cence eeee 79

. Antennae entirely yellowish, thorax largely yellowish, setulae clothing

occipital region of head, humeral callosities, mesopleura, sternopleura and
anterior surface of fore coxae golden in color............... unicolor Stein

MEM. AMER. ENT. SOC., 10

32

77-

78.

79-

80.

81.

82.

83.

84.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Antennae and thorax largely blackish, setulae clothing most of the above parts
blackish invcolori::,<2Aeecawseie cs oe ee ee ee ee Fy
Scutellum entirely blackish, second antennal segment largely blackish......
ee eed er oho ger cea Getcin Cid rcibate pie oa Sono 6 80 rufina (Fallén)
Scutellum yellowish apicad, second antennal segment yellowish.......... 78
Palpi fuscous, mesonotum with no trace of a second posthumeral bristle,
surface in this region almost devoid of setulae, scutellum nearly devoid of

setulae:onsdiscallareayeee hee ee en Eee mallocht Huckett
Palpi yellow, mesonotum with a well developed second posthumeral bristle,
scutellum with numerous setulae on discal area........ winthemi (Meigen)
Palpi entirely yellow or reddish throughout distal half.................. 80
Palpifuscous and) blackishi-}).)) tna 00 ceo ee ee eee 103

Palpi yellow or reddish, apex or distal portion darkened or infuscated....115
Ninth tergum (anal sclerite) prominently broadened along ventral border
when viewed laterad, cerci comparatively small, fifth sternum with a
proportionately large basal plate and slender weak processes which bear a

series of coarse black bristles from base to apex, e. g., gilua (fig. 66)...... 81
Ninth tergum in profile not broadly extended along ventral border, fifth
sternum not as above structurally. .........6.... 00 cece cece cece eee 84

Thorax largely yellowish, if with cuticular infuscation the areas adjacent
and including notopleural callosity yellowish tinged, proboscis yellowish. .82
Thorax largely darkened or blackish, if with yellowish tinge areas adjacent
and including notopleural callosity blackish, opaque, proboscis brewnish . 83
Mid tibia with a robust anterodorsal bristle, longer than greatest diameter
of tibia, prealar bristle over half as long as anterior notopleural bristle,
calyptracswhitisht, 22 8-35 de oper hee vittugera (Zetterstedt)
Mid tibia with at most a weakly developed anterodorsal bristle, shorter than
greatest diameter of tibia, prealar bristle not more than half length of
anterior notopleural bristle, calyptrae yellowish........ gilva (Zetterstedt)
Hind femur with anteroventral bristles longish on proximal third, longer than
those on proximal half of anterodorsal series, with a series of short fine erect
setulae on proximal half of posteroventral surface, mid and hind femora
with little if any trace of infuscation at apical region, third antennal segment
reddish ait bases. x syrcte dslocens ox eB SoS ene incisiva Stein
Hind femur with bristles on proximal third considerably shorter and weaker
than those on distal half, with no such series of erect setulae on proximal
half of posteroventral surface, mid and hind femora with infuscation on
apical region, third antennal segment entirely blackish .tenera (Zetterstedt)
Cheeks constricted caudad owing to approximation of postgenal margin and
caudoventral margin of eye (fig. 94), eyes nearly contiguous, frons not
wider than diameter of anterior ocellus...............00-eeeeeeeeuee 85
Cheeks well produced caudad, owing to the more obtuse curve of postgenal
margin (fig. 93), eyes separated by a distance greater than diameter of
anterior ocellus, except in pertusd...... 0.2... cee eee eee eee OI

85.

86.

87.

88.

89.

90.

gl.

H. C. HUCKETT 33

Scutellum with apical setulae hairlike, as those on ventral surface, abdomen
viewed from behind with paired brownish fuscous areas on cephalic half of
terga 3, 4 and 5, besides the normal dorsocentral marks, processes clothed
on inner border with numerous short setulae as in dissecta, which are not
ATKANGEC wiNeSeMIESH (A1Se OL) seers char Gil eiciee = crane OG srevache os oa lee cate ee ent 86

Scutellum with apical setulae coarser developed than hairs on ventral surface,
similar in appearance to those on lateral declivities, abdomen at most with
only a dorsocentral mark on terga 3, 4 and 5, processes not as in dissecta,
setulae or hairs along inner border, if present, arranged in series........ 87

Humeral callosities and scutellum yellowish tinged, hind coxae with a few
proximal hairs on caudal surface..................... rectifrons Huckett

Humeral callosities and scutellum grayish black, concolorous with mesonotum,
hind coxae bare on caudal surface.................. anabnormis Huckett

Processes pendant and devoid of setulae and bristles except along distal
margin where there is a series of short tactile setulae and at base of inner
margin where there are two short setulae, basal sclerite densely clothed
with short fine setae, calyptrae yellowish, antennae entirely blackish,
prosternum with a pair of bristles....................... tacta Huckett

Processes clothed with numerous bristles and setulae, apical margin not
armed with a series of setulae, basal sclerite with longish setulae and bristles,
calyptrae whitish, second antennal segment and base of third yellowish
tinged) prosternuml bares. 22.606)es0assee es omeosa et nnucasenesees 88

Thorax entirely blackish, including scutellum and humeral callosities, fore
femur and fore coxa lightly infuscated........... flavipalpis (Zetterstedt)

Thorax not entirely blackish, with at least some trace of yellowish subcolora-
tion, fore femur and fore coxa entirely yellowish..................... 89

Mid tibia with a robust mid anterodorsal bristle, fully as long as or longer than
diameter of tibia where situated, hind tibia with three anterodorsal bristles,
CALSINDTOWANS NOT [USCOUSH Meer entireties pollinosa Ringdahl

Mid tibia with at most a short mid anterodorsal bristle, shorter than diameter
of tibia where situated, hind tibia with two anterodorsal bristles, tarsi
SEONISIO RG. Goro pita Com anton cite HS coca Pecmecc RaGeRRGIN. or Orontee eos Gea cored TPR 90

Thoracic pleura largely or entirely tinged with diffuse brownish or fuscous
coloration, abdominal terga I+2, 3 and 4 with dark incisures along caudal
margin, and frequently largely blackish tinged...... univittata (von Roser)

Thoracic pleura pale yellow, at most with one or two restricted brownish
areas, abdomen with pale incisures along caudal margin of terga 1+2, 3
and 4, frequently terga entirely yellow.............. geniculata (Bouché)

Costal thorn robust, at least as long as twice breadth of costa, 7-m and m-—cu
cross veins usually clouded, basal node of veins R.o+3 and R.s+5 usually with
astewshairsvon; undersurface oe omc smmnaie ce eaee ces mos saistans erin 92

Costal thorn weak and inconspicuous, if longer than twice breadth of costa
r—m and m-—cu cross veins clear and basal node of veins R.o+3 and Riss with
no hairsvonvunder surfaces <5 5 soso Sod son ee ee se a ie Oiienne ew es 96

MEM. AMER. ENT. SOC., IO

34

92.

93-

94.

95.

96.

97.

98.

99.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Costa with conspicuously long setulae, fully as long as postocular setulae,
fore tibia with apical posterodorsal bristle well developed, hind tibia with a
robust apical posterodorsal bristle, stronger developed than apical antero-
dorsal ibristléis ws hd See RP LO etc 93

Costa with no conspicuous series of abnormally long setulae, the setulae
shorter than postocular hairs, fore tibia with apical posterodorsal bristle
weakly developed, setulose... 00.00.0000. bee cede ees eeceutseuceees 04.

The long setulae on costa few and widely spaced apart in a sparse series distad
of costal thorn, humeral callosities yellowish testaceous, parafacials and
cheeks yellowish, fore coxae yellowish, mid femur with no bristle on distal
half of anteroventral surface........................ spinosissima Stein

The long costal setulae numerous and closely set in a dense series, both
proximad and distad of costal thorn, humeral callosities blackish, concolor-
ous with mesonotum, parafacials and cheeks reddish, fore coxae blackish
infuscated, mid femur with a bristle on distal half of anteroventral surface
BE Pee eas ee en rn ee Pae LG cic othr pain ciginoss tant sti ogetro b spinigerella Malloch

Scutellum broadly yellowish along lateral declivities, humeral callosities
yellowish testaceous, pteropleura with one or more hairs situated dorsad of
caudal pair of sternopleural bristles. .............. 00 0c cece eee eeee 95

Scutellum largely blackish, yellowish apicad and along ventrocentral plane,
lateral declivities blackish, pteropleura bare above caudal pair of sterno-
pleural bristles, humeral callosities grayish black, concolorous with meso-
DLO} 5) 00 aie Lata ie ea en a ol eenractis WIC ee ics. 8) oi OROND ia, Gacicenck Onto aiometia sola afinis Stein

Third antennal segment largely yellowish, mid tibia with no mid antero-
ventral bristle, fifth tarsal segment blackish............. gophert Johnson

Third antennal segment largely blackish, mid tibia with a mid anteroventral
bristle, fifth tarsal segment yellowish..................... jinitima Stein

Vibrissae approximated, closer to one another than to nearest point on eye
margin, third antennal segment about as long as height of cheek...... 97

Vibrissae further from one another than distance to nearest point on eye
margin, third antennal segment longer than height of cheek.......... 99

Third antennal segment entirely black, tarsi yellow, concolorous with tibiae

RT rae varie RNS RIPE Nur airy si Seth hc ay Picnic minuta Malloch

Third antennal segment yellowish at base, tarsi fuscous or blackish, not con-
colorous with! tibiaes awit ss se on ae ee ee ae 98

Third antennal segment with a transverse pale area across base on inner
surface, which is scalelike in appearance, processes with a dense series of
blackish setulae along inner border at base................ ruficeps Stein

Third antennal segment with but slight indications of a pale scalelike mark on
inner surface at base, processes with no such series of setulae along inner
OKA ERs. < saee.nceios oe a OOO ene aE ee eae rufescens Stein

Scutellum entirely yellowish, legs including coxae and tarsi entirely yellowish,
fifth sternum amber colored, glossy and devoid of setulae except as a fringe

along inner margin of processes, prebasal sclerite with several bristles......
Sibyl We Gidey ender hs ras alte ronta Se a eHLORe cia] SPR ECU RGB roto ea eaaeatS cedrica Huckett

Ioo.

Tol.

102,

103.

104.

106.

H. C. HUCKETT 35

Scutellum and legs in part blackish, prebasal sclerite of hypopygium con-

cealedanddbare ret: aagats a heal): isk savin deine cadences s « 100
Scutellum and third antennal segment entirely blackish..............+.101
Scutellum and third antennal segment partly reddish tinged...........102

Processes with a conspicuous series of longish setulae along inner margin, hind
tibiae with apical posterodorsal bristle finer developed than apical antero-
dorsal bristle, eyes closely approximate, separated by about diameter of
Ai LETIOrmOCelll US tee en terol rs ele Sis Alors ehh Gr gead o heractuettins pertusa Huckett

Processes with no conspicuous series of longish setulae on inner margin, hind
tibia with apical posterodorsal bristle as robust as apical anterodorsal
bristle, eyes separated by a distance equal to that between posterior ocelli
ee ey asses A 8 Mite his Suit icc eushsiey LAW bicolor (Wiedemann)

Hind tibia with three anterodorsal bristles, apical posterodorsal bristle as
robust as apical anterodorsal, processes knobbed and polished apicad,
setulae on inner margin confined to basal half, as in bicolor. .triseta Malloch

Hind tibia with two anterodorsal bristles, apical posterodorsal bristle weaker
than apical anterodorsal, processes not thickened nor polished apicad, with
a series of longish setae along inner margin, extending to near apex......
0.0.0 610 GOld 6: G:braloyb SIGNI OTs Sty aN oes CRC Ret oA RE ee ere er rumicifoliae nom, nov.

Hind femur with a series of ten or more black spinulose setulae along proximal
two-thirds of posteroventral surface, hypopygium enlarged as in gilva

Cio: GD) 0.6 cad bopnob ooo a omnes Hoe Rous oot oaD rufipes (Zetterstedt)
Hind femur with no such series of short stout setulae on posteroventral
surface, hypopygium not notably enlarged.....................---- 104.

Costa bounding cells Sc. and R.1 becoming noticeably much broader than
attenuated section along cell 2 C., abdomen slender, terga clothed with
erect longish slender bristles, sterna 2, 3 and 4 elongate, three times as long
ENS, WAGs cones ae Old cut SOI pronese timer on oR ReU NT arian CTE lunatifrons (Zetterstedt)

Costal vein of normal and uniform proportions along cells Ru, Sc. and 2 C.,
abdomen robust, terga clothed with shorter discal and stouter marginal
bristles, sterna 2, 3 and 4 scarcely more than twice as long as broad re-
SDE CLIVE liveure nr ioe Mea INOS teres oye tste acelg Rhee G eh ANRC Peer Re cs 105

5. Both fore and hind tibiae with apical posterodorsal bristle well developed and

bristlelike, third antennal segment reddish at base, arista yellowish......
Lara Gihte Chae COE Od ELA CRM Net Sittin our ee olor a Merck wat variegata Huckett
Either fore or hind tibia, or neither, has a well developed apical posterodorsal
bristle, third antennal segment entirely blackish, arista fuscous........ 106
Processes with a conspicuous marginal series of bristles and setulae from base
to apex, greater part of inner margin protruded mesad as a bare laminate
fold, as in strigipes Zett., cheeks restricted caudad by the advanced position
Oljpostgenalsmangink ena eee Orne mecr enone marginata Huckett
Processes with no bare laminate fold protruded from the greater part of inner
margin, apex of processes devoid of setulae, bare, cheeks well maintained
caudad owing to the obtuse course of postgenal margin.............. 107

MEM. AMER. ENT. SOC., IO

36 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

107. Fore tibia with mid anterodorsal and apical posterodorsal bristles well de-
veloped, bristlelike, fore femur entirely yellow, dorsal bristle of mesopleural

series as strong and long as stigmatal bristle below mesothoracic spiracle. .

Pe re a ee Ata ere Gr a ns Salis Ala setaria (Meigen)

Fore tibia with mid anterodorsal and apical posterodorsal bristles weakly
developed, setulose, fore femur with at least trace of infuscation, dorsal
bristle of mesopleural series not as well developed as stigmatal bristle. . 108

108, Prealar bristle absent, hind tibia with two anterodorsal bristles.......... 109
Prealar bristle present, hind tibia with three or more anterodorsal bristles. . 110

109. Abdominal terga 4 and 5 with a transverse series of discal bristles, 7—m cross
vein with trace of infuscation, mid femur with a preapical bristle on anterior
surface, proboscis slender............. 0.000 c eee eee eee cognata Stein
Abdominal terga 4 and 5 with no transverse series of discal bristles, rm cross

vein clear, mid femur with no preapical bristle on anterior surface, proboscis
TOPIMAal, a/vae Sie, LMG ee earn, ee eer neva vicaria Huckett

110. Thorax viewed from behind with four interserial postsutural stripes, lying
respectively between the series of acrostical and dorsocentral, dorsocentral

and intraalar bristles, scutellum with a dark fascia across base........ III
Thorax and scutellum not so marked in all respects, markings if present along
the series of bristles or between the acrosticals...................... 112

III. Second antennal segment blackish or rufous, face grayish black, concolorous
with occiput, inner margin of processes protruded apicad as an angular

PROJECHONS ce fee eee cate ete en Petre) ae ee nee albimargo (Pandellé)
Second antennal segment yellowish, face whitish, paler than occiput, apical
region of processes rounded..................000-0e0ee- sitiens Huckett

112. Margin and hairs of calyptrae brownish black, second antennal segment
largely black ease eee ae oe a ee tinctisquama Huckett
Margin and hairs of calyptrae whitish or pale yellow.................. 113

113. Mid tibia with no mid anterodorsal bristle, calyptrae yellowish, scutellum
with trace of yellowish tinge on ventral surface....... carduorum Huckett

Mid tibia with a mid anterodorsal bristle, calyptrae whitish, scutellum uni-
formly blackishisc. vcs sre cussed ove oo se Oe eee 114

114. Thorax bluish black, palpi reddish proximad, processes with numerous setulae
along inner border, parafrontals usually contiguous at middle. .caesza Stein
Thorax grayish cinereous, palpi entirely fuscous, processes with only a few
scattered setulae and no bristles, parafrontals usually narrowly separated

at middle week ees A ee ee striata Stein
115. Hind femur with a series of ten or more black spinulose setulae along proximal
two-thirds of posteroventral surface................rufipes (Zetterstedt)

Hind femur with no such series of stout setulae on posteroventral surface. . 116

116. Scutellum entirely yellow, prebasal sclerite exposed and bristled, legs including
coxae and tarsi entirely yellow...................-..--- cedrica Huckett
Scutellum not entirely yellow, prebasal sclerite concealed and bare, legs not
entirely yellow ais 5.c4 eo Oe ee Ea wae 117

117.

118.

119.

120.

121.

122.

123.

124.

H. C, HUCKETT 37

Hind tibia with apical posterodorsal bristle strongly developed, as long or

longer than diameter of tibia where situated...............:......-- 118
Hind tibia with apical posterodorsal bristle weakly developed or setulose,
shorter than diameter of tibia where situated....................--. 119

Third antennal segment entirely black, abdomen reddish as in #riseta, fre-
quently with more or less blackish subcutaneous areas. bicolor (Wiedemann)
Third antennal segment reddish at base, abdomen grayish black with pale
incisures along caudal margins of terga as in affinis, parafrontals with a

pair of minute setulae adjacent anterior ocellus.......... variegata Huckett
Third antennal segment with a transverse reddish scalelike area at base of
TMA CIpSUiial Coppa e tre eerie s «ete. aves Se weal na omeaninees ruficeps Stein

Third antennal segment entirely black, at most reddish at extreme base....

Processes shielded laterad by an accessory sclerite which is smooth and ta-
pered caudad, bearing a dense fringe of long curling bristles along inner
margin, fore tibia darkened and with two posteroventral bristles.........
en ee cree ol He oene ANE Saati Ham aude alticola Huckett

Processes not shielded laterad by a conspicuous sclerite, fore tibia with one
posteroventral bristle . series fats .121

Thorax viewed from behind with four intétaerial stipes lyse Bemreen the
postsutural series of acrostical and dorsocentral, dorsocentral and intraalar

bristlesmmespectivielyaram ate cisterna acs coos bin aoe Ske Se ons Peeters 122
Thorax not so marked, stripes if present lying along the series of bristles or
pet weenmetheacrostl Call Sis frase. ceeane ce crrscve asser tess oo eparie: ayere ashi ce MM Ree 123

Second antennal segment blackish or rufous, face grayish black, concolorous
with occiput, inner margin of processes protruded apicad as a slight angular

ORONO S25 as na '6-5 cep Goto Ca SARC eee ee albimargo (Pandellé)
Second antennal segment yellowish, face whitish, paler than occiput, apical
region of processes rounded...............+-0+eseeeeeees sitiens Huckett

Processes protruded as bare horny plates, armed with a few tactile setulae at
apex, basal sclerite shiny and densely clothed with fine short bristles,
prosternum armed with a pair of bristles, second antennal segment blackish
3 ie ba Os eRe OS OT aes Rr een Renna ee eet tacta Huckett

Processes not projecting as bare horny plates, clothed with a few setulae
and bristles, basal sclerite sparsely clothed with diverse bristles and not
shiny prosternumubanre:scs<, 4 = cise os tee ie ane nese eo aus erenaa ne neee 124

Fifth sternum with enlarged basal plate and slender attenuated processes
which bear a series of coarse black setulae from base to apex, as in gilva
(fig. 66), cheeks restricted caudad by approximation of postgenal margin
and caudoventral angle of eye....,................- tenera (Zetterstedt)

Fifth sternum not so enlarged, processes not attenuated, longer than basal
plate, setulae not coarse, cheeks nearly as broad as third antennal segment,
well maintained caudad owing to obtuse course of postgenal margin... . .125

MEM. AMER. ENT. SOC., IO

38

125.

126.

127.

128.

129.

nN

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Abdominal terga 4 and 5 with a transverse series of discal bristles, r-m cross

vein with trace of infuscation, proboscis slender........... cognaia Stein
Abdominal terga 4 and 5 with no transverse series of discal bristles, y-m cross
vein clear, proboscis not notably slender.....................+-.0-:- 126
Prealar bristle absent, vibrissae notably approximated, separated by a distance
slightly less than height of cheek, smaller species, 4 mm............. 127
Prealar bristle present, vibrissae separated by a distance slightly greater than
height of cheek, larger species, 5mm................0.00.eeeeeeeee 128

Second antennal segment dark brownish, ventral sternopleural bristle of
caudal pair as long as anterior bristle, mid tibia with no anterodorsal bristle
Fe eee nie aie coche cae nen pensearid protrs tee eee Os APHID E'S CB oun alo vicaria Huckett

Second antennal segment yellowish, ventral sternopleural bristle of caudal
pair shorter and finer than anterior bristle, mid tibia with an anterodorsal

DriStle je. avs, alka eh oaths a ee a oe eee minuta Malloch
Mid tibia with no mid anterodorsal bristle, scutellum with trace of yellowish
tinge, calyptrae distinctly yellowish................. carduorum Huckett
Mid tibia with a mid anterodorsal bristle, scutellum entirely blackish, calyp-
trae more or less hyaline, at most with trace of yellowish............. 129
Thorax bluish black, duplicating posthumeral bristle well developed, para-
frontals usually contiguous at middle....................... caesia Stein

Thorax grayish cinereous, duplicating posthumeral bristle weakly developed
or absent, parafrontals usually narrowly separated at middle............
suche toner ie dite es Ried URE Ao RSI ear AMAR gS hyoscyami (Panzer)

Females
. Legs entirely black, at most knees reddish...................-.0-00-00- 2
Legs in part yellowish, occasionally tibiae darkened or brownish......... 14
. Mid tibia with a mid ventral or anteroventral bristle.................... B
Mid tibia with no mid ventral or anteroventral bristle................... 5

. Antennae separated at base by a prominent rounded facial elevation, pro-

pleura with a few hairs near center, apical setulae of scutellum hairlike as
those on ventral surface....................0.. Paregle aestiva (Meigen)
Antennae not separated at base by a rounded facial elevation, propleura bare,
apical setulae coarser than hairs on ventral surface of scutellum..........4

. Prealar bristle short, second antennal segment with a small wartlike tubercle

on dorsal surface, oral margin protruded cephalad......................
PE snr Ginter ay Ge orc Ge ataeerNene oc wanton Paregle cinerella (Fallén)
Prealar bristle long, second antennal segment with no wartlike tubercle on
dorsal surface, oral margin not protruded cephalad........analis Schnabl

. Arista plumose, hairs sparse and as long as width of third antennal segment,

prealar bristle as long as anterior notopleural bristle....... palposa (Stein)

H. C. HUCKETT 39

Arista bare or pubescent, hairs not longer than width of third antennal seg-
ment, prealar bristle shorter than anterior notopleural bristle........... 6

6. Hind tibia with apical posterodorsal bristle well developed, as long as apical
anterodorsal bristle, ventral sternopleural bristle of caudal pair weakly
developed, palpi slender throughout, frontal vitta entirely velvety black,
cruciate bristles well developed, apical setulae of scutellum hairlike......

EP ce AER ae a a ee! cat ing ve ay a eRe eR tae littoralis Malloch
Hind tibia with apical posterodorsal bristle weakly developed, not as long as
apical anterodorsal bristle, above characters not all present............. i

7. Apical setulae of scutellum hairlike, as those on ventral surface, hind tibia
with two anterodorsal bristles... 10.2.0... 00. cece ect tenes 10
Apical setulae coarser developed than hairs on ventral surface of scutellum,
hind tibia with three anterodorsal bristles...................-00+e00- 8

8. Cruciate bristles present and well developed, caudal pair of ocellar bristles
longish and directed outward, longer than postvertical bristles, fore tibia
with anterodorsal bristle weakly developed, ventral bristle of caudal pair

of sternopleurals weakly developed, short..................0eeeeeeeuee 9
Cruciate bristles absent or weakly developed, caudal pair of ocellar bristles
short and directed forwards, shorter than postvertical bristles, fore tibia
with a strong anterodorsal bristle on distal third, ventral bristle of caudal

pair of sternopleurals long and robust............... rubivora (Coquillett)

9. Mesonotum bluish gray with three well marked brownish stripes, hind femur
with basal bristle on ventral surface longer than width of femur where
SIGUALCC ee ReER Cee Him Rete Tete carta & They eee SAS OTe fumipennis Huckett
Mesonotum brownish gray, the stripes not so well developed, hind femur with
basal bristle on ventral surface not longer than width of femur where situ-

ACCC Me Tw EN ore eee AEA or oi Bea na ee era ae intersecta (Meigen)

10. Larger species, 5.5 mm., —cu cross vein oblique, scutellum with few accesso-
Tyesetulae Omidise! sas a tech aioe He ole Gane ea reelemmers cuticornis Huckett
Smaller species, less than 5 mm., m-—cu cross vein erect, scutellum with not
more than one or two discal accessory setulae.....................--. II

11. Lower sternopleural bristle of caudal pair well developed, longer than posterior
notopleural bristle, costal thorn well developed, about equal in length to
apical posteroventral bristle of fore tibia, pronotal setulae not spinulose

SHE Go Ad Na peckeeok ANNs bo oe ERE REED bes CRO ne mer Tr Ce oneeG nigroscutellata (Stein)
Lower sternopleural bristle of caudal pair weakly developed, shorter than
posterior notopleural bristle, costal thorn inconspicuous, shorter than length

of apical posteroventral bristle of fore tibia, pronotal setulae spinulose in
GENIE) CONDI NIVEL eee coe ge er eer ore CREM eee irids 5 matt ait meni tAneaan cro ECC es es eae 12

12. Cheeks linear, not higher than distance between posterior ocelli, ventral
margin of eye reaching a level ventrad of oral vibrissae, parafrontals and
parafacials, viewed from above, proportionately narrow, parafacials at
narrowest about as wide as distance between posterior ocelli exclusive... .

Ede sae eaad oni aT RS TT ee RTA ee a RC ESTA oh A Mostar latipalpis (Stein)

MEM. AMER. ENT. SOC., I0

40

13

14.

15.

16.

Wo

18.

19.

20.

21.

22.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Cheeks proportionately broad, higher than distance between posterior ocelli,
ventral margin of eye not reaching a level ventrad of oral vibrissae, para-
frontals and parafacials, viewed from above, proportionately broad, para-
facials at narrowest wider than distance between posterior ocelli exclusive. 13

Mid femur with an uninterrupted series of anterodorsal bristles from base to
preapical bristle, hind femur with anteroventral series of bristles extended
to proximal half as fine sparse short bristles, series of presutural acrostical
bristles seldom separated by a distance as great as that between the re-
spective series of acrostical and dorsocentral bristles....................
ee eee eee ron EAL ORO AG RA OD C0 Som pseudodissecta (Ringdahl)

Mid femur with an interrupted series of anterodorsal bristles, series being
deleted for a short distance proximad of preapical bristle, hind femur with
proximal third of anteroventral surface devoid of fine bristles, series of pre-
sutural acrostical bristles invariably separated by a distance as great as that
between the respective series of acrostical and dorsocentral bristles......
setts Bt i ta Sconce a ar ee a ee bo dissecia (Meigen)

Prealar bristle as long as or longer than anterior notopleural bristle...... 15

Prealar bristle shorter than length of anterior notopleural bristle, or absent. 44

Mid and hind tarsi with segments 4 and 5 normal and slender in appearance. 16

Mid and hind tarsi with segments 4 and 5 expanded broadly, discoid.......

mallocht Huckett

Thorax largely yellow, abdomen largely blackened..................... 17
Thorax largely: blacks... ssa eee ee Se Se EE eee 18
Palpi and second antennal segment yellowish, third antennal segment yellow-

ish at base, frontal vitta entirely reddish........... labradorensis Malloch

Palpi fuscous, third antennal segment entirely blackish, second antennal seg-
ment largely blackish, frontal vitta blackened on caudal half, reddish

cephalad’s, acikndixae ad eimelean dee eae oer oe ee partita Huckett
Fore tarsal segments 3 and 4 at least slightly broader than mid tarsal segments
M0 0G ey: Sean Pe eae eee Oe ee Cont Dare ear egos dis Nin Gale wot tesco. o cab: A 19
Fore tarsal segments 3 and 4 not broader than mid tarsal segments 3 and 4.27
First and second antennal segments reddish........................4-- 20
First and second antennal segments blackish, at most reddish along distal
[D0 cree EL cera Grates Meet. Beraiy ols Ca dic c tn oo ad a. 0 oe 23
Fore tibia with no apical posterodorsal bristle or only weakly developed. . . 21
Fore tibia with apical posterodorsal bristle well developed.............. 22

Fore tarsal segments 3 and 4 conspicuously broadened and flattened, maxi-
mum breadth of each segment nearly as great as its length, cross veins clear,

wings densely yellowish basad................-2.-0+00-- lipsia (Walker)
Fore tarsal segments 3 and 4 each much longer than maximum width, cross
veins clouded, wings mostly hyaline basad.............. chrysida Huckett

Fore tarsal segments 3 and 4 inconspicuously enlarged, maximum width not
more than half length of third segment, wing membrane clear, abdominal
pruinescence grayish drab................0eee eee eeeee cresca Huckett

H. C. HUCKETT 41

Fore tarsal segments 3 and 4 conspicuously enlarged, maximum width at
least as great as half length of third segment, wing membrane broadly
yellowish tinged, abdominal pruinescence densely yellowish............
SUG cts osha otal Cee (ec ce Re OR CM aE cag ad tarsata (van der Wulp)

23. Mid femur with a strong bristle on distal half of anteroventral surface... .24

Mid femur with no bristle on distal half of anteroventral surface........ 26

24. Fore tibia with apical posterodorsal bristle setulose, hind tibia with a bristle
on proximal half of posterior surface, mid tibia with a mid anteroventral
STASIS... o,a:o mere a ore Hee Ren eLO eICIe cae mic ninte cunt cna cee aici 6 banffi Huckett

Fore tibia with apical posterodorsal bristle robust, hind tibia with no bristle
on proximal half of posterior surface, mid tibia with no mid anteroventral
ITRUIS: aig. oth Geant thc cio tlosNtka adc Aeon eee ema AS pene erat ceenrtte cia ic arcing 25

25. Base of wings and calyptrae intensively yellowish, mid and hind femora with
weakly developed posteroventral bristles, fore tibia frequently with two
posteroventral bristles, mesonotum with well marked blackish streak
Alongglateraludechivitiessan semen aaee ore anna frigida (Zetterstedt)

Base of wings and calyptrae hyaline, at most faintly tinged, mid and hind
femora with posteroventral bristles robust, fore tibia with one postero-
ventral bristle, mesonotum with no conspicuous blackish streak along
lateral¥declivitiests mete er on ha alo aetna waar ae caduca Huckett

26. Hind tibia with a strongly developed apical posterodorsal bristle, fore femur
more or less broadly infuscated proximad, on dorsal and ventral surfaces,

‘mid tibia with a mid anteroventral bristle............. setiformis Huckett

Hind tibia with a weakly developed apical posterodorsal bristle, fore femur
with infuscation largely confined to a dorsal strip along length of femur,
mid tibia with no mid anteroventral bristle........... fuscicauda Huckett

27. Arista with longish sparse hairs, longest at least equal in length to half breadth
olethindtantennal segment .cvec seca ..cs weed onic ee hee ae wisi oa Seen een 28

Arista bare or with short pubescence, hairs not longer than half breadth of
chirdeantennalisegment.s 5+ scm sec Reo aoe be a OMe Sl emeincis mas ec 29

28. Arista with hairs plumose, longest nearly as long as breadth of third antennal
segment, caudal pair of ocellar bristles proportionately short, palpi broadly
spatulate, cruciate bristles normally well developed, hind femur with no
MmuCepOSterOventralulnist! ame eer seers juvenilis (Stein)

Arista with longest hairs scarcely longer than half breadth of third antennal
segment, caudal pair of ocellar bristles proportionately long, palpi slender,
cruciate bristles at most setulose, hind femur with a mid posteroventral
POTTS CLO Act se ee Be ane Ae ee ar EE aR ne connexa Stein

29. Posterior notopleural bristle with a few setulae at base, mesopleura with a
few setulae on declivity dorsad of mesothoracic spiracle, hind tibia with a
well developed bristle at apex of anterior surface, vibrissal angle with
numerous (10-12) coarse black setulae...................-.0.00.0-05- 30

MEM. AMER. ENT. SOC., IO

42

30.

31.

33-

34.

36.

37-

38.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Posterior notopleural bristle with no setulae at base, mesopleural declivity
with no setulae dorsad of mesothoracic spiracle, hind tibia with no well
developed apical anterior bristle, vibrissal angle with few setulae...... BR

Mid femur with no bristle on distal half of anteroventral surface......... 31

Mid femur with a bristle on distal half of anteroventral surface.......... 32

Second antennal segment blackish, mid and hind femora partly blackish, mid
tibia with a weak anteroventral bristle................ assimilis Huckett

Second antennal segment reddish, mid and hind femora reddish, mid tibia
with no anteroventral bristle.......................-0. major (Malloch)

. Parafrontals opposite anterior ocellus with a few inconspicuous setulae......

Me ee ee ea eke oreslan oth neyo an Ga Heth clcta Gloea aio atAleed wo We thrixia Huckett
Parafrontals opposite anterior ocellus with no setulae... .. incompleta (Stein)
Wing with m-cu cross vein oblique and decidedly sinuate, costal thorn robust,

posterior pair of ocellar bristles directed outward and longer than the short

bristles caudad of inner pair of vertical bristles, mid femur with a strong
bristle at base of anteroventral surface, mid tibia with a mid anteroventral

bristles: 3.05 Sets ee RS eee a oy Ra es or eee 34
Wing with m-—cu cross vein erect and nearly straight, costal thorn not robust,

posterior pair of ocellar bristles directed forward and not longer than

bristles caudad of inner pair of vertical bristles, mid femur with no strong
bristle at base of anteroventral surface, mid tibia with no mid anteroventral
bristle, series of presutural acrostical bristles separated by a distance less

than width of third antennal segment...................-.-0----0-- 40
Mid femur with a strong bristle on distal half of anteroventral surface... .35
Mid femur with no bristle on distal half of anteroventral surface......... Ba

. Second antennal segment and proximal region of third segment yellowish,

palpi largely yellowish, fore femur with infuscation confined to dorsal
SUTPA Cis 12 knlanceiona tenth a GR eee eee flavicans (Stein)
Second antennal segment and proximal region of third segment largely black-
ish, palpi largely blackish or fuscous, fore femur infuscated on dorsal and
ventral surfaces: proximad),.).2.2he) oases anne wade en eedinen a eeee 36
Veins intensively yellowish proximad, calyptrae yellowish.................
quadrispinosa (Malloch)

Veins brownish, calyptrae whitish......................45- apicalis (Stein)
Palpi at least fuscous distad, humeral callosities not yellowish testaceous,
abdomen black nnn.) «sree es SA eae GENES at che ee oe eee eee 38

Palpi largely yellow, faintly tinged at tip, fore tibia with apical posterodorsal
bristle setulose, humeral callosities yellowish testaceous, abdomen reddish
tin edhe ch cae ee oR oe le See ee lividiventris Huckett

Second antennal segment reddish throughout, hind tibia with apical postero-
dorsal bristle strongly developed, series of presutural acrostical bristles
separated by a distance less than width of third antennal segment......

substriatella (Malloch)

39.

40.

AI.

42.

43.

44.

45.

46.

H. C. HUCKETT 43

Second antennal segment largely infuscated, or blackish, hind tibia with
apical posterodorsal bristle weakly developed, series of presutural acrostical
bristles separated by a distance equal to width of third antennal segment .39

Fore tibia with apical posterodorsal bristle well developed................
A eet ge Aer eeu Re ae Ye dt, Abas daw gi Soe duplicata (Malloch)

Fore tibia with apical posterodorsal bristle setulose or absent..............
eT. Barn A eet Sed PSION ha Nes ity 9h Ns longimana (Pokorny)

Scutellum and third antennal segment entirely blackish................. 4I

Scutellum and third antennal segment partly yellowish rwmicifoliae nom. nov.

Parafrontals at middle each nearly half as wide as frontal vitta, ovipositor
with sclerites strongly chitinized, fuscous and polished, appressed dorso-
NHC A5. scoot ox 8 ches hase: arora Sues Co CE a aE ne glabra (Stein)

Parafrontals at middle each three or four times narrower than frontal vitta,
Ovipositor weakly chitinized, yellowish, concolorous with fifth tergum,
Gertselyesetul OSc mame unis ete tert Mer es cen a SiR ae rate en er es 42

Palpi yellow, mesonotum with two pronounced brownish vittae, each being
along planes of dorsocentral bristles................. vanduzeet Malloch

Palpi entirely or partly fuscous, mesonotum with no pronounced dark vittae

Abdominal terga largely grayish black, concolorous with thorax, calyptrae
yellowish, fore femur infuscated on dorsal and ventral surfaces, hind femur
with basal bristle on ventral surface longer than posterior setulae........
nib 19.1 BOB: eae ito: Oye EE Inet RS ROG UCT EE ea haemorrhoa (Zetterstedt)

Abdominal terga largely reddish and not concolorous with thorax, calyptrae
whitish, fore femur yellowish along ventral surface, hind femur with basal
bristle on ventral surface not longer than posterior setulae..............
Fe: 01076-o SIG OH Ease By Aba Aaeatln nub GENO ER EE ce ae ee nigritarsis (Zetterstedt)

Mid and hind tarsi with segments 4 and 5 expanded broadly, discoid in shape

Mid and hind tarsi with segments 4 and 5 normal and slender in appearance .46
Palpi entirely yeliow, cruciate bristles present, scutellum densely setulose on

GOTSUTORNT eee een ere a ene eo SR Le winthemt (Meigen)
Palpi fuscous, cruciate bristles absent, scutellum sparsely setulose on dorsum

cichbid. fisn-0 DUNO URAC ioe ten Sica Le NOR Ce a RCT CREE oR mallocht Huckett
BRalpitentinely yellows tearis.us tek ae Aa or seds eae ek ee ara eyee eric 47
Palpi fuscous, or yellow with apex more or less infuscated............... 75

. Wings with cross veins clouded, sometimes faintly so, basal node of veins

Ro+g and R.s+s5 with a few setulae on under surface, costal thorn robust and
prominent, mid femur with a strong bristle at base of anteroventral surface,

prealargbnistlesabsent ce cisss ss /ncs . a does see eee era ee ae A net liedelev gees 48
Wings with cross veins clear, base of veins R.s+3 and R.st+5 bare, costal thorn
weakly developed and inconspicuouS.............. 000 .eeeceeecaeecas 52

MEM. AMER. ENT. SOC., I0

44 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

48. Hind tibia with apical posterodorsal bristle strongly developed, in length
equal to apical anterodorsal bristle, costa with a prominent series of setulae,

the latter longer than breadth of costa.........................-00-. 49

Hind tibia with apical posterodorsal bristle weakly developed, finer and shorter
than apical anterodorsal bristle, costal setulae short and inconspicuous. .50

49. Mid femur with a strong bristle on distal half of anteroventral surface, third
antennal segment largely blackish, costal setulae in many instances as long

AS T= CIOSS VEIN 4a bic Hertctom Rulers Ser eee spinigerella Malloch

Mid femur with no bristle on distal half of anteroventral surface, third anten-

nal segment largely yellow, costal setulae not as long as r—m cross vein....

See Eee cect og de Gein oc G10 Aa oolo to Gi caer Gok Gol oro spinosissima Stein

50. Third antennal segment entirely black, fore femur with at least trace of in-
fuscation, scutellum, viewed from below, blackish laterad, with pale yellow-

ish ventrocentral streak, pteropleura with no hairs situated dorsad of
caudal pair of sternopleural bristles....................... affinis Stein
Third antennal segment partly yellowish, fore femur entirely yellow, scutellum
broadly yellowish throughout ventral surface, pteropleura usually with one

or more hairs situated dorsad of caudal pair of sternopleural bristles,

vibrissal angle with only a few setulae near margin................... 51

51. Third antennal segment largely yellow, with grayish tinge, mid tibia seldom
with a mid anteroventral bristle............... eto ears gopheri Johnson
Third antennal segment largely black, mid tibia with a mid anteroventral

1 Oy sks\d Keneerae i warhammer tee igen cee cron talcg cri jimtima Stein

52. Lower calyptra protruded beyond margin of upper scale, setulae of humeral
callosity and sternopleura golden colored................. unicolor Stein
Lower calyptra not extensively protruded beyond margin of upper scale,
setulae of humeral callosity and sternopleura blackish................ 53

53. Scutellum with apical setulae hairlike as those on ventral surface, palpi
conspicuously broadened and flattened distad, maximum breadth equal to
distance between posterior ocelli inclusive, costa bounding costal cell almost
devoid of setulae on lower surface...............0 00 c ee eens eee eeee 54

Scutellum with apical setulae coarser developed than hairs on ventral surface,
or occasionally with no apical setulae, palpi at most gradually broadened
distad, maximum width not exceeding distance between posterior ocelli. .55

54. Humeral callosity, scutellum and abdomen partly yellowish tinged, hind
coxae with one or more hairs on caudal surface proximad, third antennal
segment yellowish tinged at base....................-.-- abnormis Stein

Humeral callosity, scutellum and abdomen grayish drab, concolorous with
mesonotum, hind coxae with no hairs on caudal surface proximad, third
antennal segment entirely black.................... anabnormis Huckett

55. Thorax largely blackish, opaque................. 00. e eee cece eee eee 56

Thorax largely yellow or reddish yellow, or if mesonotum and pleura are ex-
tensively darkened then fore femur has a comparatively stronger bristle
among distal bristles of mid posterior series................--.+-+--- 70

56.

37:

58.

59.

60.

61.

62.

63.

H. C. HUCKETT 45

Fore tibia densely infuscated, with two posteroventral bristles, lower surface
of costa bare, vibrissal angle and oral margin protruded cephalad, the latter
to beneath apex of antennae........................... alticola Huckett

Fore tibia yellowish, concolorous with mid and hind tibiae, with one mid
posteroventral bristle, lower surface of costa with at least a few setulae,
oral margin not noticeably protruded cephalad....................... 57

Vibrissae notably approximated, separated by a distance not greater than
breadth of frontal vitta at middle, shortest distance between vibrissa and
eye margin as long or longer than that separating vibrissae............ 58

Vibrissae separated by a distance slightly greater than breadth of frontal
vitta at middle, shortest distance between vibrissa and eye margin less than
thatseparating the vibrissae. 5 2... oe cee dace ca eee sees see dae 60

Third antennal segment yellowish at base, tarsi blackish................ 59

Third antennal segment entirely blackish, tarsi yellowish... .minuta Malloch

Third antennal segment with transverse pale area on inner side at base, pre-
senting the appearance of an overlapping scale, ventral bristle of caudal
pair of sternopleural bristles short and weakly developed, or absent......

ee eee a nT ing. eat Petes Naneelehuie es DES ruficeps Stein
Third antennal segment with no scalelike yellow mark at base, ventral bristle
of caudal pair of sternopleurals well developed, longish... .rufescens Stein

Cruciate bristles present, well developed, presutural acrostical bristles sepa-
- rated by a distance fully as great as that between posterior ocelli inclusive,
EXCEPtsIME 7 GUSTUC PATNA ae erm cen ae iain ie aE re re eee 61
Cruciate bristles absent, or at most setulose, if present series of presutural
acrostical bristles closely adjacent one another, separated by a distance
scarcely equal to that between posterior ocelli inclusive............... 65
Scutellum entirely blackish, second antennal segment largely blackish, ca-
lyptrae intensively yellowish, mid femur with a bristle at base of antero-
VEILS Una Cem epsnve neueevcntes ote aas Me Sie SST okey RON CR CO ey og 62
Scutellum at least with trace of yellowish, second antennal segment largely
reddish yellow, calyptrae at most faintly tinged, mid femur usually with no

bristle at base of anteroventral surface...................00-0-0000e: 63
Prosternum with two bristles, one on either side, palpi gradually broadened,
spatulate, abdomen reddish yellow...................... tacta Huckett.

Prosternum bare, palpi narrowly thickened, clavate, abdomen blackish.....
Sao oe SERN CREO ARICA CHET OR ner eC een oc otc ses, ont unguiculata Malloch
Ventral bristle of caudal pair of sternopleurals longer than half length of
dorsal bristle, third antennal segment broadly reddish tinged on proximal
half, series of presutural acrostical bristles separated by a distance as great
as that between series of acrostical and dorsocentral bristles........... 64
Ventral bristle of caudal pair of sternopleurals not longer than half length of
dorsal bristle, third antennal segment entirely black, series of presutural
acrostical bristles separated by a distance less than that between series of
acrostical and dorsocentral bristles...................:... imceisiva Stein

MEM. AMER. ENT. SOC., 10

46

64.

65.

66.

67.

68.

69.

Fit.

72s

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Hind tibia with three anterodorsal bristles, fore femur with no robust pre-
apical posterior bristle, wings extensively yellowish..... pollinosa Ringdahl
Hind tibia with two anterodorsal bristles, fore femur with a comparatively
stronger preapical bristle in the posterior series, wings not extensively
yellowish tinged)aa Ho 2 ese eee Sec ae flavipalpis (Zetterstedt)
Hind tibia with a strongly developed apical posterodorsal bristle......... 66
Hind tibia with apical posterodorsal bristle finer and shorter in development
than apical anterodorsal bristle. ............ 0.00 cece eee eee eee ee 67
Third antennal segment and scutellum entirely black. . .bicolor (Wiedemann)
Third antennal segment and scutellum partly yellowish...... triseta Malloch
Scutellum entirely black, mesonotum with a distinctive brownish vitta along
planes of dorsocentral bristles........................ vanduzeet Malloch
Scutellum with trace of yellowish tinge at least, mesonotum with no distinc-
tive brownish vitta along planes of dorsocentral bristles . tees POS
Third antennal segment entirely black, lower srernopledrall bristle ai caudal
pair weakly developed, not as long as anterior sternopleural bristle.........
ee re ener rere) co aig apa eatee tonite osocaa carduorum Huckett
Third antennal segment yellowish proximad, lower sternopleural bristle of
caudal pair strongly developed, as long as anterior sternopleural bristle .69
Thorax bluish black, caudal segment of ovipositor not polished and blackish
in color, tarsi black, prosternum with no bristle at anterior angles........
we 8 hh Bish coe AR RT BR eI. dere Ty ee, ek pe A rumicifoliae nom. nov.
Thorax grayish black, caudal segments of ovipositor blackish and polished,
and fitted as if for piercing, tarsi yellow, prosternum with a bristle at
anterior Janiglesting 2 fea saenon esate. eRe ee cedrica Huckett

. Average distance between each series of presutural acrostical bristles at least

equal to average distance between each acrostical and dorsocentral series of
Dristlesi, cick 5 HAE eg ae Sea ee ee 71
Average distance between each series of presutural acrostical bristles decided-
ly less than average distance between each series of acrostical and dorso-

céntralibristles\.:cter tates ae ly ciate Ara acts eect aticdes Sey ale ee aero eee en te 74
Marginal bristles of fifth tergum finely developed laterad, caudal sclerites of
ovipositor weakly chitinized, armed with tufts of fine black setulae..... 72

Marginal bristles of fifth tergum strongly developed laterad, caudal sclerites
of ovipositor strongly chitinized and appressed as if for piercing, with no
tuftsiof black. setulaee ose easoen ce Oe ree 73

Frontal vitta with caudal half blackened, abdominal terga 1 + 2, 3 and 4
frequently with blackish or purplish incisures along caudal margin, and with
the intervening conjunctival membrane stiffly chitinized and appearing
frequently as a glabrous extension of the caudal margin.................
Ee rr inte She Co resG GOS AEE ON OOO Vp orn.od univittata (von Roser)

Frontal vitta entirely yellowish or with caudal half purplish or darkened, ab-
dominal terga 1 + 2, 3 and 4 with pale incisures or concolorous, and with

“I
Lo)

75:

77-

78.

H. C. HUCKETT 47

no platelike extension along caudal margin of tergum owing to the stiffening
of the conjunctival membrane...................... geniculata (Bouché)

. Basal tergum of ovipositor yellowish, opaque, armed with a robust series of

bristles along caudal margin, hind tibia with usually two anterodorsal
bristles, cruciate bristles present, hind femur with anteroventral series of
bristles extended to proximal region....,........ flavipalpis (Zetterstedt)
Basal tergum of ovipositor blackish, shining, armed with a series of fine weak
bristles along caudal margin, hind tibia with usually three anterodorsal
bristles, cruciate bristles absent, hind femur with anteroventral series of
bristles restricted to distal region, proximal half bare......... pilosa Stein
Ocellar triangle strongly shining and polished, mesonotum and abdominal
terga relatively shiny, as on proboscis, fore femur with no comparatively
stronger developed preapical posterior bristle, mesopleura rarely with dis-
tinctively developed bristle on upper margin adjacent anterior notopleural
niet Sl ere wenenset aterm aed seen Feh eushs, Sone) waht ee ake vittigera (Zetterstedt)
Ocellar triangle largely pollinose, not polished, mesonotum and abdominal
terga not as shiny as proboscis, fore femur with a comparatively stronger
developed preapical bristle in the posterior series, mesopleura invariably
with a distinct short bristle on upper margin adjacent anterior notopleural
TGYSTSLAIG & 5 Sees ela cts titty Sos le a as an on Bo gilva (Zetterstedt)
Hind tibia with only one dorsal or posterodorsal bristle, which is situated at
middle, apical dorsal bristle not developed................ solitaria Stein
Hind tibia with two or more posterodorsal bristles, apical dorsal bristle pres-

. Wings with cross veins clouded, basal node of veins R.o+3 and R.4+s with a few

minute setulae on under surface, costal thorn robust and prominent, mid
femur with a strong bristle at base of anteroventral surface. .affinis Stein
Wings with cross veins clear, basal node of veins R.o+3 and R.4+5 bare on under
SULA COME e eee A mire rent U aia yan nts ear chavs) 4 ete ore is URC hon One Nae ent ara 77
Scutellum with apical setulae hairlike as those on ventral surface, abdomen
blackish, with a dorsocentral vitta, and trace of paired brownish fascia on
anterior half of terga 3, 4 and 5, antennae and palpi largely blackish, the
latter conspicuously broadened, cruciate bristles well developed..........
tA do od AtA inte Oke Te LO OR ROL Or SIRE ERE ee ae etc aS acutipennis Malloch
Scutellum with apical setulae coarser developed than hairs on ventral surface,
abdomen at most with only trace of dorsocentral vitta............... 78
Tibial bristles fine and weakly developed, mid tibia with no mid anterodorsal
bristle and with only one bristle on posterior surface...................
Bsc Ebb uch CERO alee sts SE CER Ea Rte RS ch ei ta. lunatifrons (Zetterstedt)
Tibial bristles well developed, mid tibia with a mid anterodorsal bristle and

with two or more bristles on posterior surface...................+-0-- 79
Palpi broadly expanded and enlarged, maximum breadth greater than length
Ofgpalipallsetulaeee: cote tae oes kB eens ie ae oc UN eis, 2 80

MEM. AMER, ENT. SOC., IO

48 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Palpi narrowly expanded distad and not enlarged, maximum breadth not

greater than length of palpal setulae.............................05- 82

80. Cruciate bristles present, caudal pair of ocellar bristles longish and directed
outward, wing membrane yellowish tinged.......................... 81
Cruciate bristles absent, caudal pair of ocellar bristles short and directed
forward, wing membrane densely brownish tinged . . . .. marginata Huckett

81. Abdomen reddish, m—cu cross vein erect and sinuate, fore and middle tibiae
brownish: fuscousiaid skis. ac. Aiea ee ER Ie oes palpata Stein
Abdomen brownish to grayish drab, m-—cu cross vein slightly oblique, straight,
fore and middle tibiae yellowish................... tinctisquama Huckett

82. Third antennal segment yellowish basad...........................05. 83
Third antennal segment entirely blackish............................. 84

83. Third antennal segment with yellowish portion confined to a well defined
scalelike appearance at base on inner surface, vibrissae approximated,
separated by a distance not greater than average width of frontal vitta,
hind tibia with apical posterodorsal bristle setulose......... ruficeps Stein

Third antennal segment with no distinct demarkation restricting the yellowish
area, vibrissae separated by a distance greater than average breadth of
frontal vitta, hind tibia with apical posterodorsal bristle robust..........
SOL na cite BE semi oe be Bilal he Noe k= OE Bae Re Aer t O variegata Huckett

84. Scutellum at least distinctly yellowish in part, if tinged with fuscous lateral

declivities are: yellowish\../. a sjcws5 wh ole car oes hae, won ets ae oO ele 85
Scutellum blackish, if faintly reddish tinged in part along dorsocentral plane
or at apex lateral declivities black.................. 00.00.00 eee eee 88

85. Marginal bristles of fifth abdominal tergum well developed, similar to those of
fourth tergum, fore tibia with a distinct mid anterodorsal bristle, ovipositor
heavily chitinized, blackish, polished, and sharply tapering caudad as if for
piercing, acrostical bristles well developed, in well set paired series, humeral
callosities:vellowishl=.< acc. Ao CH ie Asie ae oe ee a oo OG 86

Marginal bristles of fifth tergum weakly developed, weaker than those on
fourth tergum, ovipositor weakly chitinized as in hyoscyami, not for pierc-
ing, acrostical bristles weakly developed in two adjacent series, humeral
callosities) blackish: Sxspusns: istustiee ceseu! Aeterna neaeee carduorum Huckett

86. Hind femur with anteroventral bristles restricted to distal region, proximal
half noticeably bare, hind tibia invariably with three anterodorsal bristles
PEM Te eerie Ce NS Mena ceva yitiy Hn Syeh aubh orn GBS ong a0. pilosa Stein

Hind femur with anteroventral series of bristles extending to proximal region,
hind tibia invariably with two anterodorsal bristles.................. 7

87. Basal tergum of ovipositor yellowish, opaque, armed along caudal margin
with robust bristles, cruciate bristles present, fore femur uniformly fuscous
tinged on proximal and distal regions................ tenera (Zetterstedt)

Basal tergum of ovipositor blackish, shining, armed along caudal margin with
fine weak bristles, cruciate bristles usually absent, fore femur largely
yellow, fuscous area restricted to apical region of dorsum..............

rufipes (Zetterstedt)

88.

89.

90.

gl.

93.

H. C. HUCKETT 49

Abdomen blackish, concolorous with mesonotum, occasionally reddish tes-
taceous in part or of paler hue along caudal margins of terga, if reddish,
acrostical bristles setulose and in two adjacent series...............:. 89

Abdomen reddish, mesonotum blackish, abdomen occasionally with more or
less integumentary darkening, or with blackish incisures along caudal
margins of terga, if blackish, acrosticals well developed and widely separated
betweenethexsenies@ must rn reac T we awa acuta Seba ydisiiel sae ciyyeld culm em es 100

Fore tibia with apical posterodorsal bristle well developed, fore femur entirely
yellow, mid tibia with two short bristles on proximal half of posterior
surface, caudal intraalar bristle as long as caudal dorsocentral bristle... .
Bao RO SNE a eo OGD ESE EL OIG Oy nee RRC ene is setaria (Meigen)

Fore tibia with apical posterodorsal bristle weakly developed or setulose, mid
tibia with less than two bristles on proximal half of posterior surface, fore
femur partly infuscated, caudal intraalar bristle shorter than caudal
dorsocentrallbnistlemry- 05 wat seein sete tees Mie speslale Hee ale emm aden es 90

Mid and hind femora extensively infuscated throughout proximal and distal
regions, darker than their respective tibiae......................---- QI

Mid and hind femora concolorous with tibiae, yellowish, at most with trace
of fuscous areas on distal half............. 0... c cee eee ene eee 94.

Presutural series of acrostical bristles as widely spaced apart as distance
between respective series of acrostical and dorsocentral bristles, with
setulae between the series of acrostical bristles, antennae relatively large,
reaching a level with oral margin.................. longicornis Huckett

Presutural series of acrostical bristles closer to one another than to their
respective series of dorsocentral bristles, with invariably no setulae between
series of acrostical bristles, antennae not abnormally large, apex not reach-
imedleveliotrorallmangmesavs.ctsrate eye c eeicaaen oes osevaal «ee eeameevne endear cree 92

. Second antennal segment entirely yellow, vibrissae closely approximated,

distance between them not as great as shortest distance between vibrissae
and eye margin, fore tibia with no mid anterodorsal bristle..............
p\'.6 Avon 0.8 Saeed aE ETO eA RRR La ot ares Cte coicie co Conan enh convergens Huckett
Second antennal segment at least partly infuscated, distance between vibrissae
as great as that between vibrissae and eye margin, fore tibia with a mid
AMteHOMOnSalGlomIStl Ox ch ts ks. fey RS cas ese Suctie SAG HENAN TRE EES Rare Sons Sos 2
Thorax and abdomen with a well marked brownish dorsocentral vitta, para-
facials and cheeks largely whitish pruinescent, with trace of subfuscous
reflections, fifth abdominal tergum with no erect discal setae, proboscis
ShontmandlGtles hives cies as ere rasa ieee ater eeu asremetact ee atlanis Huckett
Thorax and abdomen with no dorsocentral vitta, abdomen at most with an
ill-defined dorsocentral marking, parafacials and cheeks reddish, with
trace of whitish pruinescence, fifth abdominal tergum with a few erect
discal setae, proboscis normal...................... flavifrons (Walker)

MEM. AMER. ENT. SOC., 10

50

94.

95.

96.

97.

098.

99.

Too.

Iol.

NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Prealar bristle absent=:.2.09 sas eye ee es oe cae eee pea 95
Prealar bristle present ys 55 Hee lee ee ae Oe es ee eee 97
Palpi entirely and uniformly fuscous, second antennal segment dark brown or
black, mesonotum with brownish dorsocentral streaks... .vicaria Huckett
Palpi paler proximad, not uniformly fuscous, second antennal segment yel-
lowish, mesonotum with no brownish dorsocentral streaks............. 96
Tarsi yellow, concolorous with tibiae, humeral callosity yellowish testaceous,
ventral bristle of caudal pair of sternopleurals short and weakly developed,
fifth tergum with no discal series of stout bristles, y—-m cross vein clear... .
na Rr Letter eS ae OF oa ME atin GitnG,tifcisowses dota. ay oh minuta Malloch
Tarsi brownish, darker than tibiae, humeral callosities grayish black, ventral
bristle of caudal pair of sternopleurals stoutly developed, about as long as
anterior bristle, fifth tergum with a discal series of stoutish bristles, 7—-m
cross vein with trace of infuscation........................ cognata Stein
Parafrontals at middle nearly half as wide as interfrontalia, ovipositor ap-
pressed strongly dorsoventrad, glossy and blackish, fifth tergum longer than
fourth, ventral bristle of caudal pair of sternopleurals nearly as long as
anterior sternopleural bristle...........................5. glabra (Stein)
Parafrontals at middle not broader than one third width of interfrontalia,
Ovipositor not in all respects as above, fifth tergum not longer than fourth,
ventral bristle of caudal pair of sternopleurals weaker and shorter than
anterior ibristlentuy, creeds otter eee ea 98
Fore tibia densely infuscated, with two posteroventral bristles, lower surface
of costa bare on proximal half, cruciate bristles present, second antennal

sepiment blackish tu a0 5.2 pe a iy Pe ag See eterna alticola Huckett
Fore tibia yellow, with one posteroventral bristle, lower surface of costa
setulose, cruciate bristles absent, second antennal segment yellow...... 99

Marginal bristles of fifth tergum as strongly developed as those on fourth
tergum, calyptrae at most with trace of yellowish tinge. . kyoscyamz (Panzer)
Marginal bristles of fifth tergum weaker developed than those on fourth,
calyptrae decidedly yellowish tinged................ carduorum Huckett
Lower calyptra notably protruded beyond margin of upper, series of presutural
acrostical bristles more widely separated from one another than from the
nearest series of dorsocentral bristles, with setulae between acrostical
series, antennae: black). 4.45, Wes sae A ier oe ee eee rufina (Fallén)
Lower calyptra not noticeably protruded beyond margin of upper, series of
presutural acrostical bristles not more widely separated from one another
than from nearest series of dorsocentral bristles, second antennal segment
reddish or reddishwbrowit. se.2209. 00355 eee eee eee 101
Parafrontals at middle nearly half as wide as interfrontalia, ovipositor strongly
appressed dorsoventrad, terminal sclerites blunt and rounded on caudal
margin, fifth tergum longer than fourth.................... glabra (Stein)

H. C. HUCKETT 51

Parafrontals at middle not more than one third width of interfrontalia, ovi-
positor not strongly appressed dorsoventrad, tapering and not as above,

fifth tergum not longer than fourth.........................0005- .102

102. Third antennal segment large and broad, reaching oral margin, cruciate
bristles present, presutural acrostical bristles well developed, bristlelike. .
Ee peut cet ewee ie rote, Ul y eeRaereehe aun? wie) apeaedandielrane caesia Stein

Third antennal segment not large and broad, not reaching oral margin,
cruciate bristles absent, presutural acrostical bristles not robust....... 103

103. Ventral sternopleural bristle of caudal pair longish, equal to three-quarters
length of dorsal bristle, prealar bristle longer than posterior notopleural
bristle, calyptrae whitish.....................0-. nigritarsis (Zetterstedt)
Ventral bristle of caudal pair of sternopleurals short, not longer than half
length of dorsal bristle, prealar bristle not longer than posterior noto-
pleuralipristley calyptraeitingedm ease: asco) do ea] eases eee 104

104. Fore tibia with no mid anterodorsal bristle, mesonotum cinereous gray....
slg. te is GOA dig, cittetccos esa ob fone Soar Cade eae ene reac eR eae .carduorum Huckett

Fore tibia with a mid anterodorsal bristle, mesonotum bluish black ........

obs OGRONS or oid. OS Be gaeSs AU. Sth ao CeIn ES Deer ec eee eR nee sitiens Huckett

Pegomyia analis Schnabl

Pegomyia (Anthomyia) analis Schnabl, Mém. Acad. Sci. Petrograd, sér. 8, XXVIII,

no. 7, p. 18, 1915.

Pegomyia analis Ringdahl, Skrifter om Svalbard og Ishavet, no. 53, p. 18, 1933.

Séguy, Gen. Insect., fasc. 205, p. 52, 1937.

I have not seen this species, which is recorded by Ringdahl as
occurring on the east coast of Greenland. He mentions that his
Chortophila alpina is probably the same species and that both may
eventually be found to be identical with Anthomyza tunicata
Zetterstedt. Mr. Ringdahl informs me that the species may be
distinguished from related forms by the blackish tibiae and by the
presence of a bristle on anteroventral surface of mid tibia.

Pegomyia palposa (Stein) (Figs. 1, 30, 54.)

Hydrophoria palposa Stein, Entom. Nachr., XXII, p. 320, 1897. Stein, Arch. f.
Naturgesch., (1913), LXxIx, (A), hft. 8, p. 31, 1914.

Pegomyia (Pegoplata) palpata Schnabl and Dziedzicki, Abh, K. Leop.-Carol.
Deutsch. Akad. Naturforsch., xcv, nr. 2, p. 109, 1911. Séguy, Gen. Insect.,
fasc. 205, p. 50, 1937.

Pegomyia palposa Stein, Arch. f. Naturgesch., (1915), Lxxxt, (A), hft. 10, p. 130,
1916. Séguy, Gen. Insect., fasc. 205, p. 61, 1937.

MEM. AMER. ENT. SOC., IO

52 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Pegomyia (Pegoplata) palposa Séguy, Faune de France, VI, p. 149, 1923.

Hydrophoria orientalis Huckett, Mem. 77, N. Y. (Cornell) Agr. Exp. Station,
(1923), p. 16, 1924. Huckett, Mem. 1o1, N. Y. (Cornell) Agr. Exp. Station,
(1926), p. 837, 1928. Séguy, Gen. Insect., fasc. 205, p. 134, 1937.

Pegomyza palposa Karl, Tierwelt Deutschlands, xu, pt. 3, p. 121, 1928.

The species resembles Pegomyia virginea (Meigen), from which
it differs slightly in the larger development of lower calyptral scale,
shorter length of prealar bristle, and weaker development of apical
posterodorsal bristle of hind tibia. In virgznea the lower calyptral
scale does not protrude beyond margin of upper, prealar bristle is
comparable in length to the first intraalar bristle, and apical
posterodorsal bristle of hind tibia is as long as apical anterodorsal
bristle. The basal sclerite of hypopygium in male of both species
is shining black as in juvenilis, but the legs are largely black and
not yellow as in the latter species. The related form wrginea is
listed by Séguy (1937) as occurring in North America, a record I
hesitate to accept without further corroborative evidence.

NEw YorK: I <, Riverhead, Long Island, August 18 1923, type, [C. U.]. 5 2,

same locality, July 3 1927; 27, Wading River, Long Island, May 17 1923, (H. C.
Huckett), [H. C. H.].

Pegomyia intersecta (Meigen) (Figs. 2, 31, 55.)

Anthomyia imtersecta Meigen, Syst. Beschr., v, p. 175, 1826.

Phorbia neglecta Meade, Ent. Month. Mag., xIx, p. 219, 1883.

Chortophila quintilis Pandellé, Rev. Ent. France, XIx, p. 253, 279, 1900.

Pegomyia (Anthomyia) intersecta Schnabl and Dziedzicki, Abh. K. Leop.-Carol.
Deutsch. Akad. Naturforsch., Xcv, nr. 2, p. III, IQII.

Chortophila intersecta Stein, Arch. f. Naturgesch., (1915), LXxxI, (A), hft. 10, p.
190, 1916.

Chortophila (Chortophila) intersecta Séguy, Faune de France, VI, p. 129, 1923.

Chortophila (Nudaria) intersecta Karl, Tierwelt Deutschlands, x11, pt. 3, p. 174,
1928.

Hylemyia (Nupedia) intersecta Ringdahl, Kongl. Svensk. Vetenskap. Akad.
Skrift. Naturskyddsar., nr. 18, (3), p. 20, 1931. Ringdahl, Ent. Tidskr., Liv,
(1), p. 33, 1933. Tiensuu, Acta Soc. Faun. Flor. Fennica, LVul, (4), p. 20, 1935.

Hylemyia (Nupedia) intersecta arctica Ringdahl, Skrifter om Svalbard og Ishavet,
LIll, p. 16, 1933.

The species intersecta closely resembles the North American
form unguiculata Malloch in structure and chaetotaxy, differing
in that the palpi and legs are black and not yellow. In the male

H. C. HUCKETT 53

of both species the hypopygium is shining black and the processes
are of hornlike texture, devoid of bristles and terminating distad
in a digitlike appendage. The female of intersecta possesses cruci-
ate bristles and differs from females of the dissecta-group in having
apical setulae of scutellum coarser in development than hairs on
ventral surface.

The specimens before me apparently agree closely with Ring-
dahl’s conception of the smaller darker circumpolar variety arctica.

ALBERTA: 2 6’, Banff, July 14 1922;1 o&, July 13 1922, (C. B. D. Garrett); 1 &,
Nordegg, July 5 1921, (J. McDunnough); 1 o, Waterton, July 2 1924, (H. L.
Seamans), [C. N. C.].

British CoLuMBIA: I o’, Hedley, July 3 1923, (C. B. D. Garrett); 1 9, Inver-
mere, July 28 1926; 1 9, Fairmont, July 28 1926, (A. A. Dennys), [C. N. C.].

CALIFORNIA: I o, Monrovia Canyon, February 17 1935, (M. W. Stone), [J.
Wilcox].

IDAHO: I o, Paradise Ridge, Moscow, May 17 1930, 3000 ft. alt. (Paul Rice),
[H. C. H.].

MONTANA: 2 9, Gallatin County, Aug. 15 1912, 5400 ft. alt.; 1 o&, Pipestone
Pass, July 29 1923, (A. L: Melander); [A. L. M.].

OREGON: 2 9, Aneroid Lake, Blue Mts., 7500 ft. alt., July 23 1929, (H. A.
Scullen); [H. C. H.].

UrTaH: I o’, Card Canyon, Logan Canyon, July 24 1938, (W. P. Nye), [Utah
Agr. Col.].

Pegomyia littoralis Malloch (Figs. 4, 33, 57.)

Pegomyia littoralis Malloch, Bull. Brooklyn Ent. Soc., Xv, no. 5, p. 127, 1920.
Huckett, Mem. 77, N. Y. (Cornell) Agr. Exp. Station, (1923), p. 45, 1924.
Johnson, Occ. Pap. Boston Soc. Nat. Hist., vil, p. 232, 1925. Frison, Bull. Ill.
Nat. Hist. Surv., XVI, art. 4, p. 206, 1927. Johnson, Insect Fauna, Biol. Surv.
Mt. Desert Region, p. 210, 1927. Huckett, Mem. ror, N. Y. (Cornell) Agr. Exp.
Station, (1926), p. 840, 1928. Séguy, Gen. Insect., fasc. 205, p. 59, 1937.

The species superficially resembles Prosalpia sepiella (Zetter-
stedt), differing in that the male lacks the fringe of longish setulae
on posteroventral surface of hind metatarsus in sepiella. The fe-
males of the two species are scarcely distinguishable. Despite the
hind tibial characters possessed by Jittoralis that denote its re-
lationship to Pegomyia it has not been possible to go further and
link the species with any group within the genus. Its closest
affinities seem to be placed elsewhere as indicated by its resem-
blance to sepiella.

MEM. AMER. ENT. SOC., 10

54 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

MAINE: 2 o’, Bar Harbor, July 21 1919, (C. W. Johnson), [H. C. H.]

NeEw HAmpsHIRE: 1 co’, Mount Cadillac, Mt. Desert, July 25 1919, (C. W. John-
son). Holotype, [N. E. M. N. H.]. 1 &, Noxon Camp, 2000 ft. alt., July 5 1931,
(J. M. Aldrich), [U. S. N. M.]. 1 &, Franconia Notch, July 8 1931; 1 <, Lost
River, July 7 1931, (A. L. Melander), [A. L. M.].

New York: 1 o, Wilmington Notch, Adirondacks, July 2 1922, (J. M. Aldrich),
[U.S.N.M.]. 2 @, Old Forge, July 6 1905;2 9, August 2 1905, [N. Y. State Coll.].

Pegomyia cuticornis Huckett
Pegomyia cuticornis Huckett, Trans. Amer. Ent. Soc., LXv, p. 18, 1939.

The species cuticornis belongs to the dissecta-group. It may in-
variably be distinguished from group forms by its larger size and
oblique course of m—cu cross vein, and from dark-legged forms in
other groups by the hairlike nature of the apical setulae on scu-
tellum.

ALBERTA: 2 @, Banff, August 2 1922, 7000 ft. alt.; 2 9, September 11 1922,
(C. B. D. Garrett), [C. N. C.]

BRITISH COLUMBIA: I o', 1 9, Hedley, July 20 1923, (C. B. D. Garrett), Type
and allotype, [C. N. C.]. 1 9, Hedley, Aug. 29 1923, (C. B. D. Garrett), Paratype
[A. N.S. P.]. 1 @, Glacier, July 20 1901, [H. C. H.].

COLORADO: 2 9, Trail Ridge Pass, 12,100 ft. alt., August 23 1936, (C. L. Fluke),
[Univ. Wisc.].

Pegomyia pseudodissecta (Ringdahl) (Figs. 6, 34, 62.)
HHylemyia pseudodissecta Ringdahl, Ent. Tidskr., x_vu, hft. 2, p. 111, 1926. Ring-
dahl, Trémso Museums Arsheft., (1926), XLIX, hft. 3, p. 41, 1928. Séguy, Gen.

Insect., fase. 205, p. 108, 1937.

Hylemyia (Nupedia) pseudodissecta Ringdahl, Svensk. Veten. Akad. Skrift. Natur-
skvd., nr. 18, p. 20, 1931. Ruingdahl, Ent. Tidskr., Liv, hft. 1, p. 33, 1933.
Tiensuu, Acta Soc. Faun. Flor. Fennica, LVI, no. 4, p. 20, 1935.

The male of pseudodissecta may be distinguished from related
forms by the presence of long slender bristles on proximal half of
antero- and posteroventral surfaces of hind femur; as in dissecta
the sternopleural setulae have a tendency to curve upwards at
tip. In the female the species differs from dissecta in that there
are invariably one or two fine short bristles on proximal third of
anteroventral surface of hind femur and the presutural series of
acrostical bristles are seldom separated by a distance as great as
that between the respective series of acrostical and dorsocentral

H. C. HUCKETT 55

bristles. Comparative studies have been based on a large series
of specimens collected in Swedish Lappland.

ALASKA: 4 6’, 7 9, Kodiak, June 1917, (Jas. S. Hine), [Ohio State Univ.].

Pegomyia dissecta (Meigen)

Anthomyia dissecta Meigen, Syst. Beschr., v, p. 176, 1826. Nehaus, Dipt. Marchica,
p- 231, 1886.

Chortophila dissecta Stein, Kat. Palaark. Dipt., 11, p. 715, 1907. Ringdahl, Ent.
Tidskr., xxxv, hft. 3-4, p. 154, 1914. Stein, Zool. Jahrbiich., xxxrx, hft. 1, p.
137, 1915. Stein, Arch. f. Naturgesch., (1913), Lxxrx, (A), hft. 8, p. 40, 1915.
Stein, Arch. f. Naturgesch., (1915) Lxxx1, (A), hft. 10, p. 185, 1916. Huckett,
Ann. Ent. Soc. Amer., XIV, no. 4, p. 300, 1921.

Egle dissecta Schnabl, Deutsch. Ent. Zeitschr., hft. 6, p. 81, 1911. Schnabl and
Dziedzicki, Abh. K. Leop.-Carol. Deutsch. Akad. Naturforsch., xcv, nr. 2, p.

105, IQII.
Egle dissecta tundrica Schnabl, Mém. Acad. Sci. Petrograd, sér. 8, XXVIII, no. 7,
Pp. 17, 1915.

Phorbia dissecta Bequaert, The Bryologist, XxIVv, no. I, p. 2, 1921.

Hylemyia (Chortophila) dissecta Séguy, Faune de France, VI, p. 125, 1923.

Pegomyia dissecta Huckett, N. Y. (Cornell) Agr. Exp. Station, Mem. 77, (1923),
p. 44, 1924. Huckett, Mem. tor, N. Y. (Cornell) Agr. Exp. Station, (1926),
p. 840, 1928. Johnson, Insect Fauna, Biol. Surv. Mt. Desert Region, (1927),
p. 209, 1928.

Chortophila (Nudaria) dissecta Karl, Tierwelt Deutschlands, xin, pt. 3, p. 172,
1928.

Hylemyia dissecta Ringdahl, Trdmso Museums Arshefter, (1926), XLIX, hft. 3, p.
40, 1928. Ringdahl, Arkiv Zool., xxi, (A), no. 20, p. 5, 1930. Séguy, Gen.
Insect., fasc. 205, p. 89 and 455, 1937.

Hylemyia (Nupedia) dissecta Ringdahl, Kongl. Svensk. Veten. Akad. Skrift.
Naturskyddsarenden, nr. 18, p. 20, 1931. Ringdahl, Ent. Tidskr., Liv, hft. 1,
Pp. 33, 1933. Tiensuu, Acta Soc. Faun. Flor. Fennica, Lv, hft. 4, p. 20, 1935.

Nupedia dissecta Collin, Ent. Month. Mag., LXxv, p. 147, 1939.

The male of dissecta closely resembles that of nigroscutellata and
latipalpis. I have distinguished it from the latter species by the
fact that when the mesonotum is viewed from behind the three
broad vittae appear to extend caudad to base of scutellum, by the
presence of coarse stiffened black setulae on mid ventral region of
head between the oral cavity and occipital foramen, and by the
proportionately finer development of anterior sternopleural bristle
when compared with the ventral bristle of caudal pair. In nigro-

MEM. AMER. ENT. SOC., 10

56 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

scutellata and latipalpis the mesonotal area cephalad of scutellum
is largely pruinescent and lacks three broad vittae when viewed
from behind, the setulae caudad of oral cavity are fine, curved and
pointed, and the cephalic bristle of sternopleural series is as robust
as the ventral bristle of caudal pair.

Structurally the female of dissecta resembles more closely that
of pseudodissecta than those of nigroscutellata and latipalpis in that
the width of parafacial at middle when viewed from above is about
equal to half length of third antennal segment, and the setulae
caudad of oral cavity are coarse and spinulose. In nigroscuiellata
and latipalpis the parafacials at middle are narrower and the
setulae are finer developed. In pseudodissecta the hind femur has
one or two fine bristles on proximal third of anteroventral surface,
which are seldom present in the female of dissecta.

NEWFOUNDLAND: I o’, Carbonier, August 2 1925, (J. M. Swaine), [C. N. C.].

NeEw HAMPSHIRE: 1 9, Halfway House to Gorham, July 20 1935, (F. S. Blanton),
[H. C. H.]. 2 o&, Benton, July 6 1931; 2 <, Alpine Garden, Mount Washington,
July 11 1931, (A. L. Melander), [A. L. M.].

NEw YorRK: 2 o’, 2 9, McLean Bogs, McLean, May 7 1922;1 a’, 2 9, August
18 1928, 1 o’, Ringwood near Ithaca, July 13 1920, (H. C. Huckett), [H. C. H.].

ONTARIO: I o, Lyn, July 9 1926, (C. H. Curran); 1 &, Ottawa, May 23 1927;
1 9, Whitby, July 6 1926; 2 =, Niagara Glen, June 9, 1926, (G. S. Walley),
ICN Ch

QUEBEC: I 9, Kazubazua; June 6-10 1927; 1 9, Covey Hill, June 27 1927,
(W. J. Brown), [C. N. C.].

VERMONT: 40 o’, 3 2, Peak Mountain, Menace July 17 1935; 1 9, Mount
Equinox, July 15 1935; 1 9, near West Rupert, July 14 1935; 1 9, Middlebury,
July 16 1935, (F. S. Blanton), [H. C. H.].

Pegomyia latipalpis (Stein)

Chortophila latipalpis Stein, Arch. f. Naturgesch., (1918), Lxxxiv, (A), hft. 9,
p. 89, 1920.

Hylemyia (Nupedia) latipalpis Ringdahl, Ent. Tidskr., Liv, hft. 1, p. 33, 1933.
Tiensuu, Acta Soc. Faun. Flor. Fennica, LVI, no. 4, p. 20, 1935.

Hylemyia latipalpis Séguy, Gen. Insect., fasc. 205, p. 99, 1937-

Nupedia latipalpis Collin, Ent. Month. Mag., Lxxv, p. 148, 1939.
Structurally the male of latipalpis most closely resembles that of

nigroscutellata, as has already been indicated in the discussion of

dissecta. The males of latipalpis have the eyes proportionately

H. C, HUCKETT 57

larger than is the case in nigroscutellata, the eye margin impinging
more noticeably on parafacials, the palpi are more extensively
flattish, and the thorax is deep brownish black with dense brownish
pruinescence, whereas in nigroscutellata the thorax is more highly
grayish pruinescent. In chaetotaxy I find the species to differ as
indicated in the key.

The female of Jattpalpis may be distinguished from that of
nigroscutellata by the weaker development of ventral sternopleural
bristle of caudal pair, and by the spinulose nature of the setulae
across cephalic border of mesonotum; and from that of dissecta
by the narrower parafacials and cheeks and by the more normal
finer appearance of the setulae on mid ventral region of occiput,
between oral cavity and occipital foramen.

ALASKA: I o, Anchorage, June 11 1921, (J. M. Aldrich), [U. S. N. M.].

ALBERTA: 1 o, Waterton, July 14 1923, (H. L. Seamans), [C. N. C.].

BritTIsH COLUMBIA: I 9, Keremeos, June 22 1923; 1 @, June 20 1923, (C. B. D.
Garrett), [C. N. C.].

MICHIGAN: I go’, Isle Royale, August 3-7 1936, (C. W. Sabrosky), [Mich. State
Coll.].

Se 1 2, Low Bush, Lake Abitibi, June 18 1925, (N. K. Bigelow), [C. N. C.]

WASHINGTON: I o, Longmire’s Springs, Mount Rainier, Aug. 2 1905, type,
[Z. M. U. B.].

Pegomyia nigroscutellata (Stein) (Figs. 5, 36, 60.)

Chortophila nigroscutellata Stein, Arch. f. Naturgesch., (1918), LXxxIv, (A), hft.
9, (May), p. 90, 1920.

Pegomyia slossonae Malloch, Bull. Brooklyn Ent. Soc., Xv, no. 5, (Dec.), p. 127,
1920. Johnson, Occ. Pap. Boston Soc. Nat. Hist., no. vil, p. 232, 1925. Séguy,
Gen. Insect., fasc. 205, p. 63, 1937.

Hylemyia nigroscutellata Séguy, Gen. Insect., fasc. 205, p. 105, 1937.

The markings on the thorax and abdomen of male exhibit a
large amount of variation, thus giving to these parts a paler or
darker aspect. However in all cases the scutellum when viewed
from behind is entirely black and somewhat glossy, showing up in
marked contrast to the paler drab pruinescence on mesonotum
when apparent. The female, as represented, differs nost notably
from that of allied species in having the ventral sternopleural
bristle of caudal pair relatively well developed, being longer than
posterior notopleural bristle.

MEM. AMER. ENT. SOC., 10

58 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

ALASKA: 2 9, Katmai, July 1917, (J. S. Hine).

ALBERTA: I o, Waterton, July 15 1923, (H. L. Seamans), [C. N. C.]. 1 9,
Edmonton, May 24 1936;1 9, August 20 1936, (E. H. Strickland), [Univ. Alberta].

MICHIGAN: 2 9, Isle Royale, August 3-7 1936, (C. W. Sabrosky), [Mich. State
Coll.].

New HampsHIRE: I o', Mount Washington, 2500 ft. alt., June 14 1916, (C. W.
Johnson), Type of slossonae, [N. E. M. N. H.].

NEw York: 1 o', McLean Bogs, McLean, May 7 1922; 1 o, Wading River,
Long Island, May 17 1925; 1 9, Ellis Hollow, near Ithaca, May 24 1922, (H. C.
Huckett); [H. C. H.].

ONTARIO: 3 o’, Low Bush, Lake Abitibi, June 8 1925; 1 o, June 4 1925; 3 oc,
June 6 1925; 1 9, June 2 1925, (N. K. Bigelow); [C. N. C.].

QUEBEC: I o’, Cottage Beaulieu, July 16 1906; [C. N. C.].

SouTH Dakota: 1 &, Hot Springs, July 13 1924, [H. C. H.].

VERMONT: I o’, near West Rupert, July 14 1935, (Blanton & Borders), [H. C. H.].

WASHINGTON: 6 <, Electron, May 7 1935, (J. Wilcox), [H. C. H.J. 1 &, Monroe,
May 20 1908, cotype of nigroscutellata, [Z. M. U. B.].

WISCONSIN: I o’, Dane County, May 17 1937, (Fred Snyder), [Univ. Wisc.].

Pegomyia fumipennis Huckett
Pegomyia fumipennis Huckett, Trans. Amer. Ent. Soc., LXv, p. 20, 1939.

This is a dark Chortophila-like species, which I am unable to
associate with any group as herein defined. Superficially it re-
sembles species of the dissecta-group, differing in that apical setulae
of scutellum are coarsely developed, processes of male are struc-
turally different in character, and in female the caudal pair of
ocellar bristles is longish and directed outwards. The species
differs from the rubivora-group in the characters of hypopygium
and ovipositor. The female of fumipennis resembles that of
intersecta. Further characters for the recognition of the species
may be found in the keys.

BRITISH COLUMBIA: I 9, Oliver, May 2 1923; 1 9, Cranbrook, May 17 1922,
(C. B. D. Garrett), [C. N. C.].

WASHINGTON: I <7, Loon Lake, May 16 1924, (A. L. Melander), Type, [A. L. M.].

Pegomyia haemorrhoa (Zetterstedt)

Anthomyza haemorrhoa Zetterstedt, Ins. Lapp., p. 692, 1838.

Aricia transversalis Zetterstedt, Dipt. Scand., Iv, p. 1538, 1845. Siebke, Enum.
Insect. Norveg., p. 112, 1877.

Aricia icterica Holmgren, Ofvers. Kgl. Vet. Akad. Foérhandl., (1872), XXIX, nr. 6,
p. 102, 1873.

H. C. HUCKETT 59

Anthomyia haemorrhoa Neuhaus, Diptera marchica, p. 227, 1886.

Phorbia intersecta Meade, Entom. Month. Mag., 0, ser. 4, p. 222, 1893.

Aricia (Phorbia) icterica Lundbeck, Vidensk. Medd. naturh. Foren. Kbh., 11,
p. 286, 1900.

Anthomyia (Pegomyia) haemorrhoa Pandellé, Rev. Ent. France, Xx, p. 298, 1901.

Phorbia icterica Aldrich, Misc. Coll. Smithsn. Inst., XLvi, no. 1444, p. 556, 1905.

Pegomyia haemorrhoa Stein, Wien. Ent. Zeitg., XXv, p. 102, 1906. Stein, Arch. f.
Naturgesch., (1913), LxxIx, (A), hft. 8, p. 35, 1914. Stein, Arch. f. Naturgesch.,
(1915), LXxxt, (A), hft. 10, p. 131, 1916. Ringdahl, Trdmso Museums Arshefter,
XLIX, (1926), nr. 3, p. 33, 1928. Ringdahl, K. Svensk. Vetenskapsakad. Skrift.
Naturskydds., nr. 18, pt. III, p. 21, 1931. Tiensuu, Acta Soc. Faun. Flor. Fennica,
LVIII, no. 4, p. 28, 1935. Séguy, Gen. Insect., fasc. 205, p. 56, 1937. Carpenter
and Holm, Ann. Mag. Nat. Hist., ser. 11, 11, p. 71, 1939.

Chortophila icterica Stein, Kat. Palaark. Dipt., m1, p. 718, 1907.

Pegomyia (Pegomyia) transversalis Schnabl and Dziedzicki, Abh. K. Leop.-Carol.
Deutsch. Akad. Naturforsch., xcv, nr. 2, p. 112, I9II.

Pegomyia (Pegomyia) haemorrhoa Séguy, Faune de France, VI, p. 160, 1923. Karl,
Tierwelt Deutschlands, x11, pt. 3, p. 130, 1928. Ringdahl, Ent. Tidskr., Li1x,
hft. 3-4, p. 200, 1938.

Hylemyia icterica Séguy, Gen. Insect., fasc. 205, p. 96, 1937.

The species haemorrhoa is recorded by Carpenter and Holm
(1939) as occurring in North East Greenland from specimens
identified by Dr. F. W. Edwards. In my opinion the separate
sexes of the same species had been previously recorded among the
fauna of Greenland by Holmgren (1873) and Lundbeck (1900)
under the name icferica from specimens taken in North Greenland
and on its western littoral. I have seen what I consider to be
another specimen of this species from Katmai, Alaska, collected
by Professor J. S. Hine.

The series of specimens representing icterica, including Lund-
beck’s cotypes, are deposited in the Zoological Museum of the
University of Copenhagen. Through the kindness of Doctor
Lundbeck and Doctor Henriksen I have been able to study this
material, and it seems evident from what I have seen of these
forms that their superficial appearance may vary widely according
to the extent and degree of infuscation on thorax, abdomen and
legs. There are slight differences observable in the comparative
extent to which parafrontals, parafacials and length of prealar
bristle may be developed in the males of icterica as exemplified in
the above series and those of haemorrhoa as represented by Swedish

MEM. AMER. ENT. SOC., 10

60 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

specimens, but I do not believe that such differences are of specific
value. All the specimens of icterica and haemorrhoa that I have
seen agree in having the same characteristic form and color to the
copulatory appendages. In this respect the species may be linked
to vanduzeer and the european fly versicolor (Meigen). In van-
duzeet the palpi are yellowish, whereas in the other two species the
palpi are largely fuscous.
ALASKA: I o', Katmai, June 1917, (J. S. Hine).

GREENLAND: I o, Orpiksuit, July 16 1890;7 o, 1 9, Haklahavn, July 30 1802,
(W. Lundbeck), [Z. M. U. C.].

Pegomyia rubivora (Coquillett)

Phorbia rubivora Coquillett, Can. Ent., xx1x, p. 162, 1897. Slingerland, Bull. 126,
N. Y. (Cornell) Agr. Exp. Station, p. 54-60, 1897. Aldrich, Misc. Coll. Smithsn.
Inst., XLVI, no. 1444, p. 557, 1905. Britton, Bull. 31, Conn. Geol. Nat. Hist.
Surv., p. 199, 1920. Cole and Lovett, Proc. Cal. Acad. Sci., x1, no. 15, p. 313,
1921.

avoatte rubivora Stein, Arch. f. Naturgesch., (1917), Lxxxim, (A), hft. 1, p. 154.
1919. Huckett, Ann. Ent. Soc. Amer., XIv, p. 306, 1921. Enderlein, Zeitschr,
f. Angew, Entom., xx, hft. 2, p. 328, 1933.

Pegomyia rubivora Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 126, 1920. Huckett,
Mem. 77, N. Y. (Cornell) Agr. Exp. Station, (1923), p. 47, 1924. Johnson, Occ.
Pap. Boston Soc. Nat. Hist., vi, p. 232, 1925. Huckett, Mem. tor, N. Y.
(Cornell) Agr. Exp. Station, (1926), p. 841, 1928.

Hylemyia rubivora Séguy, Gen. Insect., fasc. 205, p. 111 and 457, 1937.

The species rubivora is closely allied to the european form
dentiens (Pandellé), from which, with the limited material before
me, I am unable to satisfactorily distinguish it, and on account of
which I hesitate to draw any further conclusions regarding the
possibility of their similar identity. Séguy (1937) after considera-
ble study of the evidence before him finally came to the conclusion
that there was not sufficient differences between the two forms to
warrant their recognition as separate species. In both forms the
male processes are lined on inner margin with an extended series
of prominent setae, and parafrontals are wider than distance be-
tween posterior ocelli. In habitus both species resemble glabra
(Stein), from which they may be distinguished by the entirely
blackish tibiae and processes.

MANITOBA: I o’, Aweme, May 23 1923, (N. Criddle), [C. N. C.].

H. C. HUCKETT 61

New YorRK: 1 o,1 9, Ithaca, April 8 1897, (C. U. Exp. no. 516), paratypes ex
raspberry canes, [C. U.]. 1 9, same locality, May 1 1913; 1 @, April 29 1922,
(M. D. Leonard). [H. C. H.].

PENNSYLVANIA: I @, Germantown, April 21 1905, [A. N. S. P.].

QUEBEC: I <, Quarry Island, Mingan, June 13 1929, (W. J. Brown), [C. N. C.].

Pegomyia glabra (Stein) (Figs. 7, 35, 58.)
Chortophila glabra Stein, Arch. f. Naturgesch., (1918), Lxxxtv, (A), hft. 9, p. 88,
1920.

Hylemyia glabra Séguy, Gen. Insect., fasc. 205, p. 95, 1937.

The species is described by Stein as having black legs. An
examination of the cotype in the Zoological Museum of the Uni-
versity of Berlin reveals that fore tibiae are largely infuscated,
mid and hind tibiae successively less so, the integument being
extensively yellowish throughout distal half. In the female the
legs are largely reddish yellow. The species resembles rubivora in
habitus. The processes of male are sparsely bristled and horny
in appearance, the inner margin has for the most part a series of
fine setulae.

British CoLuMBIA: 1 9, Oliver, April 21 1923, (C. B. D. Garrett), [C. N. C.].

CALIFORNIA: I 9, Redwood Canyon, Marin County, May 17 1908, [A. N. S. P.].

COLORADO: I <, Boulder, April 1 1934, (M. T. James), [Colo. State Col.].

UTAH: I &, Spanish Fork, (D. Elmo Hardy), [H. C. H.].

WASHINGTON: I o’, Pullman, February 26 1901, cotype, [Z. M. U. B.]. 2 2,
same locality, April 21 1924, (A. L. Melander), [A. L. M.]. 1 &, Ellensburg, April
20 1935, (W. W. Baker); 1 , Almota, February 12 1934; 2 92, same locality,
February 19 1934, (J. F. Clarke), ex Equisetum sp., [H. C. H.].

Pegomyia major (Malloch) (Figs. 10, 39, 71.)
Eremomyia major Malloch, Proc. Cal. Acad. Sci., 1X, ser. 4, p. 310, 1919. Séguy,

Gen. Insect., fasc. 205, p. 122, 1937.

In major the second antennal segment is entirely reddish in both
sexes, a character which serves to distinguish the species from all
related forms known to me.

ALBERTA: 2 o', Edmonton, June 6 1937, (E. H. Strickland), [Univ. Alberta].

IDAHO: 1 o’, Mount Moscow, June ro 1930, (J. M. Aldrich), [U. S. N. M.].

MonTANA: I 9, Gallatin Mts., June 20 1914, 6500 ft. alt., [U. S. N. M.].

OREGON: I &', I Q, Corvallis, April 17 1929, (V. T. Shattuck); 1 9, Kiger’s
Island, April 12 1930, (J. Wilcox), [H. C. H.].

MEM. AMER. ENT. SOC., 10

62 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Pegomyia assimilis Huckett
Pegomyia assimilis Huckett, Trans. Amer. Ent. Soc., Lxv, p. 22, 1939.

The species assimilis resembles apicalis (Stein), from which it
may be distinguished by the absence of a bristle on distal half of
anteroventral surface of mid femur, and by the presence of setulae
at base of posterior notopleural bristle and on the mesopleural
declivity dorsad of mesothoracic spiracle.

CALIFORNIA: I o, San Mateo County, Feb. 22 1920, (E. J. Whitney), type,
EN INS, Lb

Pegomyia thrixia Huckett
Pegomyia thrixia Huckett, Trans. Amer. Ent. Soc., LXV, p. 23, 1939.

The species thrixia resembles tncompleta Stein, from which it
may be distinguished by the presence of a few setulae on para-
frontals adjacent the ocellar callosity; from assimilis by the pres-
ence of a bristle on distal half of anteroventral surface of mid
femur. In the male of thrixza the frons is broad, as in incompleta,
but it differs from the male of that species in that the vestiture on
abdominal sterna 3 and 4 is not restricted to caudal half of each
sclerite and the hypopygium is not so enlarged. The female, in my
opinion, has been mistakenly recorded by Malloch® as Eremomyia
apicalis Stein.

ALBERTA: I o', Edmonton, May 15 1937, (E. H. Strickland), [Univ. Alberta].

Iowa: I o, Ottuma, March 3 1929, (Jaques), Type, [A. N.S. P.].

MINNESOTA: I o, St. Anthomy Park, May 1 1920, [F. M. Snyder].

Pegomyia incompleta (Stein) (Figs. 8, 37, 70.)

Eremomyia incompleta Stein, Berl. Ent. Zeitschr., (1897), xLi1, hft. 3-4, p. 228,
1898. Aldrich, Misc. Coll. Smithsn. Inst., XLvI, no. 1444, p. 554, 1905. Stein,
Arch, f. Naturgesch., (1917), LxXxxil, (A), hft. 1, p. 153, 1919. Stein, Arch. f.
Naturgesch., (1918), LXxxIV, (A), hft. 9, p. 74, 1920. Séguy, Gen. Insect., fasc.
205, p. 122, 1937.

In zncompleta and thrixia the mid femur has a bristle on distal
half of anteroventral surface and the frons in male is considerably
wider than breadth of third antennal segment. In the male of

32 Malloch, J. R. Diptera from the Southwestern United States. Paper IV. Antho-
myidae. Trans. Amer. Ent. Soc., LXIV. p, 303, 1918.

Bi, ©, HUCK IMP 63

incompleta the hypopygium is expansive, giving the abdomen a
stout truncated appearance, and the bristles on abdominal sterna
3 and 4 are restricted to the caudal half of each sclerite; in the
female the second antennal segment is blackish and mid tibia has
one or two anteroventral bristles, as in male.

ALBERTA: I o’, Medicine Hat, March 14 1926, (F. S. Carr), [C. N. C.].

IDAHO: I @, Viola Grade, Moscow, 3000 ft., April 15 1933, (E. W. Whitman).

MINNESOTA: I co’, St. Anthony Park, (Lugger), cotype, [Field Museum].

UranH: 1 9, Mount Logan, June 24 1938, (G. F. Knowlton), [Utah Agr. Col.].

WASHINGTON: 3 o’, Pullman, May 22 1923; 1 o, Mount Rainier, Shadow Lake,
6,500 ft. alt., August 15 1932; 2 9, August 24 1932, (Dorothy and Charles Martin);
7 &,2 9, Mount Rainier, Sunrise, 6400 ft. alt., July 29 1933, (J. Wilcox).

Pegomyia apicalis (Stein) (Figs. 13, 41, 74.)
Eremomyia apicalis Stein, Berl. Ent. Zeitschr., (1897), XLU, p. 227, 1898. Aldrich,
Misc. Coll. Smithsn. Inst., XLv1, no. 1444, p. 554, 1905. Malloch, Trans. Amer.
Ent. Soc., XLIV, p. 303, 1918. Stein, Arch. f. Naturgesch., (1917), LxxxuI, (A),
hft. I, p. 153, 1919. Stein, Arch. f. Naturgesch., (1918), Lxxxtv, (A), hft. 9, p.

74, 1920. Séguy, Gen. Insect., fasc. 205, p. 122, 1937.

Pegomyia apicalis Malloch, Bull. Brooklyn Ent. Soc., xv, p. 125, 1920. Cole and

Lovett, Proc. Cal. Acad. Sci., XI, p. 313, 1921.

The species apicalis is closely related to quadrispinosa, from
which it differs by having mid and hind femora in male partly black-
ened. In the female of apicalis the wing veins are brownish and
the calyptrae whitish, whereas in guadrispinosa the veins are in-
tensively yellowish proximad, and the calyptrae are yellowish
tinged.

Stein (1920) in his key to females of Hremomyia mentions that
the second antennal segment of apicalis is distinctly reddish. I
have examined the specimens from California on which Stein
partly based his diagnosis, and have come to the conclusion that
these specimens are not conspecific with the male of apicalis, but
probably represent the female sex of major (Malloch). The second
antennal segment of all specimens of apicalis before me is at least
nearly entirely black, as in quadrispinosa. The remaining female
specimens listed under apicalis by Stein were from Moscow,
Idaho. These examples could not be found in the collection at
Berlin.

MEM. AMER. ENT. SOC,. 10

64 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

ALBERTA: 1 9, Waterton Park, July 14 1923, (E. H. Strickland), [Univ. Alberta].

BRITISH COLUMBIA: I o', Nicola, May 17 1923, (E. R. Buckell); 1 o&, Keremeos,
June 18 1923, (C. B. D. Garrett), [C. N. C.].

IDAHO: I o, Lewiston Hill, May 3 1925, (A. L. Melander), [A. L. M.].1 &,
Moscow, cotype, [Field Museum].

MONTANA: 1 <, Baird, July 31 1923, (A. L. Melander), [A. L. M.].

New Mexico: 1 9, Cloudcroft, May 24 1902, [A. N.S. P.].

UTAH: 1 &, 2 9, Clarkston, April 27 1938, 4 &@, 3 2, Cache Junction, April 27
1938; I o&, Logan Canyon, May 28 1938; 1 @, Petersboro, April 27 1938, (G. F.
Knowlton), [Utah Agr. Col.].

WASHINGTON: I <’, Blewett, May 29 1932, (J. Wilcox), [H. C. H.]. 1 o, Pull-
man, May 20 1917; 2 o’, Loon Lake, May 16 1924, (A. L. Melander), [A. L. M.].
1 o', Buckeye, June 21 1930, (J. M. Aldrich), [U. S. N. M.].

WYOMING: I o’, Wilson, July 22 1926, [Univ. Idaho].

Pegomyia fuscicauda Huckett
Pegomyia fuscicauda Huckett, Trans. Amer. Ent. Soc., LXV, p. 31, 1939.

The species fuscicauda has the habitus of chrysida, of which it
might well be considered a darker form. The two species differ
notably in the color of antennae and hypopygium. The second
antennal segment in fuscicauda is extensively infuscated and the
reddish tinge on third segment is limited to basal regions or en-
tirely masked, whereas in chrysida the second antennal and proxi-
mal region of third segment are bright yellow. In the male of
fuscicauda the hypopygial sclerites are distinctly blackish and
lustrous in contrast to the opaque grayish color of abdomen,
whereas in chrysida these sclerites are grayish pruinescent and tend
to conform to the color of the adjoining parts of the abdomen.

In such allied forms as setiformis and frigida the hypopygium is
similarly black and shining, but fuscicauda may be distinguished
from the former in both sexes by the absence of a robust bristle at
apex of posterodorsal surface of fore and hind tibiae, and by the
absence of a weak bristle at middle of anteroventral surface of mid
tibia; from frigida by the absence of a bristle on distal half of
anteroventral surface of mid femur. In the female of these three
species the third and fourth fore tarsal segments are broadened.

It is evident from the large series of specimens examined that
those taken in California are considerably paler than those from
Oregon, Washington and Alberta. In the latter form the para-

H. C. HUCKETT 65

frontals and mesonotum may be extensively brownish pruinescent
and mid and hind femora considerably darkened. In occasional
specimens the apical posterodorsal bristle of fore tibia may exhibit
some degree of development, and in the female this bristle may be-
come quite robust.

ALBERTA: I o', Edmonton, June 10 1937, (E. H. Strickland), [Univ. Alberta].

CALIFORNIA: I o', I 9, Falls, Forest Home, San Bernardino County, November
4 1934, (A. J. Basinger), type and allotype, [A. N. S. P.]. 1 @, Forest Home,
November 10 1925, (M. W. Stone); 2 o, Mount Home Canyon, San Bernardino
Mts., June 8 1924, (J. M. Aldrich), [U.S. N. M.]. 1 #, Mount Wilson, August 4
1915; 1 @, Fallen Leaf, 6500 ft. alt., July 16 1917, (J. M. Aldrich), [U. S. N. M.]..
1 2, Gold Lake Camp, Plumas County, July 20 1916; 1 9, Giant Forest, Sequoia
National Park, August 22 1917, (R. C. Shannon), [H. C. H.].

CoLorADO: 2 9, Lake City, 8700 ft. alt., August 8-15 1936, (C. L. Fluke),
[Univ. Wisc.].

IDAHO: I o*, Waha, May 30 1924, (A. L. Melander), [A. L. M.].

OREGON: 1 2, Hood River, (Childs); 1 9, Three Sisters, Scott Lake, 4650 ft. alt.,
August 8 1926, (H. A. Scullen), [Ore. State Col.].

WASHINGTON: 2 3’, I @, Electron, May 7 1925, (A. L. Melander), paratypes,
[A. L. M.]. 1 #, Mount Rainier, White River, July 20 1924; 1 9, Mount Baker,
Skyline Trail, August 10 1925, (A. L. Melander), [A. L. M.]. 1 9, Longmire
Spring, August 29 1925; 2 9, Mount Rainier, Yakima Park, July 25 1932; 1 &,
1 9, Mount Rainier, Shadow Lake, July 31 1932, 6200 ft. alt.; 1 9, Mount Rainier,
White River Camp, August 10 1934, (J. Wilcox), [J. Wilcox].

Pegomyia spinigerella Malloch (Figs. 18, 47, 81.)

Pegomyia spinigerella Malloch, Trans. Amer. Ent. Soc., XLVI, p. 178, 1920. Mal-
loch, Bull. Brooklyn Ent. Soc., xv, p. 124, 1920. Frison, Bull. Ill. Nat. Hist.
Surv., XVI, p. 206, 1927.

Pegonomyia spinigerella Séguy, Gen. Insect., fase. 205, p. 320, 1937.

In the male of spznigerella all the femora are largely fuscous or
brownish, being darker than tibiae; in the female the femoral
infuscation is not so noticeable. In both sexes the scutellum is
faintly yellowish apicad and bare on disc, the mesonotum has a
brownish spot caudad of each bristle belonging to last pair of
dorsocentrals. In the female the tarsi become increasingly slender
and thin distad, the third and fourth segments being laterally
compressed. The species is further discussed in the paragraphs
dealing with spinosissima Stein.

MEM. AMER. ENT. SOC., 10

66 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

ARIZONA: I Q, Pinery Canyon, Foothills, Chirichua Mts., 5200 ft. alt., July 2,
(Witmer Stone), [A. N. S. P.].

FLORIDA: I ’, Jacksonville, Nov. 3 1911, [U. S. N..M.].

ILLINOIS: 1 o', Havana, April 30 1914, type, [Ill. N. H. S.J. 1 &, Havana, June
3 1918, paratype, [A. N.S. P.].

SoutH Dakota: I 6, Canton, June 17 1924, [H. C. H.].

TEXAS: I o, College Station, March 20 1929, (H. J. Reinhard); 1 @, same
locality, May 3 1931;1 o, April 1 1930, (F. M. Hull), [Texas A. & M. Col.].

Pegomyia affinis Stein

Pegomyia affinis Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 286, 1898. Coquillett,
Invert. Pacific, Dipt., 1, p. 33, 1904. Aldrich, Misc. Coll. Smithsn. Onst.,
XLVI, no. 1444, p. 558, 1905. Malloch, Trans. Amer. Ent. Soc., XLIv, p. 302,
1918. Stein, Arch. f. Naturgesch., (1917), Lxxxin, (A), hft. 1, p. 148, 1919.
Stein, Arch. f. Naturgesch., (1918), Lxxxtv, (A), hft. 9, p. 72, 1920. Malloch,
Bull. Brooklyn Ent. Soc., Xv, p. 124, 1920. Huckett, Ann. Ent. Soc. Amer., xtv,
p. 312, 1921. Cole and Lovett, Proc. Cal. Acad. Sci., x1, p. 313, 1921. Huckett,
Mem. 77, N. Y. (Cornell) Agr. Exp. Station, (1923), p. 43, 1924. Johnson, Occ.
Pap. Boston Soc. Nat. Hist., vil, p. 232, 1925. Johnson, Insect Fauna, Biol.
Surv. Mt. Desert Region, p. 209, 1927. Huckett, Mem. 1o1, N. Y. (Cornell)
Agr. Exp. Station, (1926), p. 840, 1928. Curran, Bull. Amer. Mus. Nat. Hist.,
LXI, p. 86, 1930. Séguy, Gen. Insect., fasc. 205, p. 51, 1937.

Pegomyia vicina Stein (not Lintner), Berl. Ent. Zeitschr., (1897), XLII, p. 239,
1898.

The species affinis may be distinguished from related forms by
the following characters: Third antennal segment entirely black,
scutellum blackish along lateral declivities and with a yellowish
ventrocentral streak, hairs absent on pteropleura above caudal
pair of sternopleural bristles, apical posterodorsal bristle on fore
and hind tibiae invariably weakly developed. In occasional speci-
mens palpi may be infuscated at apex. Frost** in error has applied
the name affints for a leaf-miner in dock, a species which Malloch
(1919) later described as vanduzeet.

CALIFORNIA: I @, San Diego, March 28 1916, (H. G. Dyar), [U. S. N. M.].
I o&, Corona, March 23 1932; 1 9, Colton, March 5 1932, (C. H. Martin). 1 9,
Lane’s ‘““Rdwd.” Camp, June 22; 1 <, Mill Creek Canyon, San Bernardino Mts.,
June 7 1924, (J. M. Aldrich), [U. S. N. M.]. 1 9, Forest Home, San Bernardino
County, Sept. 21 1935; I 9, Chino, April 25 1934; 1 9, Loma Linda, March 20
1933, (A. J. Basinger). 1 9, Aguanga, April 23 1933, [A. J. Basinger].

33 Frost, S. W. Two species of Pegomyia mining the leaves of dock. Journ. Agr.
Research, XVi, pp. 229-243, 3 pls., 1919.

H. C. HUCKETT 67

ILLINOIS: 2 o’, 1 2, Algonquin, [U. S. N. M.].

MARYLAND: 5 o', 6 9, Plummers Island, June 15 1911, from den of Marmota,
(H. S. Barber), [U. S. N. M.].

MASSACHUSETTS: I co’, Beverly, June 13 1870, [U. S. N. M.]. 1 @, Petersham,
June 9 1932, (A. L. Melander), [A. L. M.].

NEw HAMPSHIRE: I 9, Franconia, (Slosson), [A. M. N. H.].

New Mexico:1 9, Deer Creek Canyon, Peloncillo Mts., [U. S. N. M.].

NEw YorRK: I o, Onteora Mountain, Greene County, July 4 1929, (L. O.
Howard), [U.S.N. M.]. 2 &%, 2 9, Taughanic Falls, near Ithaca, August 14 1928;
1 9, Aurora, May 30 1920; 1 o’, Ithaca, May 23; 1 o, Lake Ridge, near Ithaca,
June 20 1920; 2 o, Coy Glen, near Ithaca, May 22 1922; 1 o, Harmon, July 5
1926; 1 o, Riverhead, Long Island, May 8 1927, [H. C. H.]. 1 &, Babylon, Long
Island, May 12 1935, (F. S. Blanton). 1 9, Poundridge, May 16 1931, (A. L.
Melander), [A. L. M.].

OKLAHOMA: I 9, Wyandotte, June 4 1934, (M. Maxwell), [Okla. A. & M. Col.].

ONTARIO: 2 <, Ottawa, July 10 1919, (G. E. Shewell), [C. N. C.]. 1 , Wau-
bamick, June 1915, (H. S. Parish), [A. L. M.].

OREGON: 2 <”, Roseburg, April 6 1930, (J. Wilcox). 1 9, Talent, September 30
1916, (C. A. McCormick), [J. Wilcox].

QUEBEC: I 9, Hemmingford, July 3 1924, (T. Armstrong). 1 9, St. Anne’s,
August 3 1918, [Macdonald College]. 1 9, Abbotsford, June 11 1936, (G. E.
Shewell), [C. N. C.].

RHODE ISLAND: I <’, Watch Hill, September 6 1920, (W. J. Holland), [Carnegie
Museum].

UTAH: 1 9, Centerville, June 11 1935, (G. F. Knowlton), [Utah Agr. Col.].
1 9, Logan, July 20 1938, (D. E. Hardy).

VERMONT: I 9, Bolton, July 16 1935, (F. S. Blanton), [H. C. H.].

VIRGINIA: I o', Acquia Creek, May 24 1896, cotype, [Field Museum]. 1 <%,
Chain Bridge, September 18 1921, (J. R. Malloch), [U. S. N. M.]. 1 ¢@, Great
Falls, June 21 1931, (A. L. Melander), [A. L. M.].

WASHINGTON: I o, Kiona, March 1 1935, (J. Wilcox), [H. C. H.].

WISCONSIN: I co’, Dane County, June 23 1936, (F. M. Snyder); 1 o, Racine,
May 30, 1932, (T. C. Allen), [Univ. Wisc.].

Pegomyia acutipennis Malloch (Figs. 9, 38, 59.)

Pegomyia acutipennis Malloch, Trans. Amer. Ent. Soc., XLIv, p. 301, 1918. Mal-
loch, Bull. Brooklyn Ent. Soc., xv, p. 125, 1920. Huckett, Mem. 77, N. Y.
(Cornell) Agr. Exp. Station, (1923), p. 43, 1924. Frison, Bull. Ill. Nat. Hist.
Surv., XVI, p. 205, 1927. Huckett, Mem. 1o1, N. Y. (Cornell) Agr. Exp. Station,
(1926), p. 840, 1928. Séguy, Gen. Insect., fasc. 205, p. 51, 1937.

I have considered the species acuttpennts and others with yellow-
ish tibiae as allied to the dark-legged forms of the dissecta-group

MEM. AMER. ENT. SOC., IO

68 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

because the species possess the following characters in common:
Apical setulae of scutellum hairlike, cruciate bristles present in
both sexes, palpi flattish and broadened, and in the male the proc-
esses are typical of dissecta. In acutipennis the palpi are blackish
and not yellowish as in certain allied species, the abdomen in male
is slender and is marked on the terga with a series of trimaculate
areas, resembling Anthomyia pluvialis L. in this respect.

ALBERTA: I 9, Banff, September 21 1922, (C. B. D. Garrett), [C. N. C.].

ARIZONA: I 9, Carr Canyon, Huachuca Mts., Cochise County, August 1905,
paratype, [A. N. S. P.].

BRITISH COLUMBIA: I 9, Keremeos, July 10 1923; 1 9, June 27 1923, [C. N. C.].

CALIFORNIA: 2 o', 17 9, Cuyamaca Mts., San Diego County, Aug. 16 1914,
(J. C. Bradley), [C. U.]. 1 9, Mill Creek, San Bernardino Mts., 5200-5500 ft. alt.,
August 28, (Rehn & Hebard), [A. N.S. P.]. 1 9, Gold Lake Camp, Plumas County,
July 20 1916; 1 9, Mount Home Canyon, San Bernardino Mts., June 8 1924,
(J. M. Aldrich), [U. S. N. M.].

CoLoRADO: I 9, Lake City, August 8-21, 1938, alt. 9000 ft., (C. L. Fluke),
[Univ. Wisc.].

ILLINOIS: I 2, Grand Tower, April 21 1914, [Il]. N. H.S.].

New Mexico: 1 <, Alamogordo, April 30 1902, type, [A. N. S. P.].

New York: 1 <’, Black Mountain, Lake George, Sept. 4 1920, (M. D. Leonard),
(st, ©. TS.

TEXAS: I 9, Chisos Mountains, July 11, (H. W. Wenzel), [A. N.S. P.].

WIsconsIN: 1 9. Devils Lake, May 30 1936, (F. M. Snyder), [Univ. Wisconsin].

Pegomyia anabnormis Huckett

Pegomyta anabnormis Huckett, Trans. Amer. Ent. Soc., LXV, p. 20, 1939.

I have tentatively accorded specific rank to the closely allied
forms anabnormis, abnormis and rectifrons. It is quite possible
that on further study of more material it will be found that one or
more of these forms are but variants of the same species. In the
male of anabnormis the eyes are closely approximate on frons, and
the humeral callosities and scutellum are grayish black, concolorous
with mesonotum. The male from South Dakota differs from the
type of anabnormis in having second antennal segment extensively
infuscated and not entirely yellowish; the male from New Mexico
has mid and hind femora largely yellowish. All three species are
allied to acutipennis, from which they may be distinguished by
their yellowish palpi.

H. C. HUCKETT 69

BRITISH COLUMBIA: I o, Keremeos, July 31 1923, (C. B. D. Garrett), type,
[eaNer

CALIFORNIA: I 9, Falls, Forest Home, San Bernardino County, September 4
1934, (A. J. Basinger), allotype, [C. N. C.].

New Mexico: I <a’, Santa Fé, July, [A. N. S. P.].

SouTH DAKOTA: I <, Spearfish, July 28 1924, [H. C. H.].

Pegomyia lunatifrons (Zetterstedt)

Anthomyza lunatifrons Zetterstedt, Dipt. Scand., Iv, p. 1708, 1845.

Pegomyia minima Stein, Wien. Ent. Zeitg., XXV, p. 100, 1906. Stein, Aven, f.
Naturgesch., (1913), LXxXIx, (A), hft. 8, p. 34, 1914. Stein, Arch. f. Naturgesch.,
(1915), Lxxx1, (A), hft. 10, p. 126, 1916. Karl, Tierwelt Deutschlands, x11,
pt. 3, p. 137, 1928. Ringdahl, Arkiv Zool., xx1 (A), no. 20, p. 5, 1930. Ringdahl,
K. Svensk. Veten. Kap. Akad. Skrift. Naturskyddsarenden, nr. 18, p. 21, 1931.
Séguy, Gen. Insect., fasc. 205, p. 60, 1937.

Pegomyia lunatifrons Stein, Kat. Palaark. Dipt., 111, p. 705, 1907.

Pegomyia (Pegomyiella) lunatifrons Ringdahl, Ent. Tidskr., L1x, hft. 3-4, p. 212,
1938.

The specimens were identified by Mr. Ringdahl as those of
minima Stein. I have accepted his later conclusions (1938) to the
effect that minima is a synonym of lunatifrons (Zetterstedt). The
species, as Ringdahl has indicated, is notable on account of the
abnormally robust development of costa. In North American
specimens the abdomen is slender and frail, terga clothed with
uniformly slender erect bristles that exhibit little if any differen-
tiation into marginal and discal bristles, cephalic third of third,
fourth and fifth terga and a considerable median area on first &
second terga are devoid of bristles, processes are yellowish, lamel-
late and rounded on apical margin, with a dense fringe of fine
short setulae on inner margin, the setulae becoming sparser distad,
inner margin has a glossy chitinous process at apex, ventral sterno-
pleural bristle of caudal pair shorter than anterior sternopleural
bristle, antennae and palpi black, proboscis polished, tarsal seg-
ments robust and compressed, third and fourth being short.

The female agrees with the male in many of the above characters,
differing in that abdominal bristles are shorter and marginal bristles
of terga are developed into a series of stouter bristles, anal palpi
of ovipositor have fine slender setulae, head has cruciate bristles

MEM. AMER. ENT. SOC., IO

7O NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

and a longish pair of caudal ocellar bristles, the latter are directed
outward.
ALBERTA: 1 Q, Banfi, September 7 1922, (C. B. D. Garrett), [C. N. C.].

OREGON: 2 co’, 1 Q, Aneroid Lake, Blue Mts., 7500 ft. alt., July 23 1929, (H. A.
Scullen), [H. C. H.].

Pegomyia corrupta Huckett
Pegomyia corrupia Huckett, Trans, Amer, Ent. Soc., LXV, p. 13, 1939.

The species corrupta has the habitus of albimargo (Pandellé),
under which name it was first recorded by Malloch* as occurring
in North America. I have reexamined the specimens which formed
the basis for this record and believe them to be distinct from
albimargo on account of the absence of mesonotal stripings and
scutellar marks that characterize the albimargo-subgroup. The
male specimens of corrupia that I have seen exhibit a certain degree
of variability in abdominal and femoral coloration. In one of the
paratypes the abdomen is partly yellowish and the hind femora
are yellowish proximad, whereas in the remaining specimens the
femora are entirely blackish, resembling those of jlavifrons
(Walker). The processes of corrupta also resemble those of
flavifrons in structure and bristling, but they are not so widely
separated from one another as in that species. I have seen another
specimen of corrupta taken by J. S. Hine at Naknek Lake, Savonos-
ki, Alaska.

ALASKA: U ot, Nome, August 24-25, 1916, (F. Johansen), type, [C. N. C.J. 2 3,
same locality, Aug. 21 1916, (F. Johansen), paratypes, [C. N. C.].

Pegomyia longicornis Huckett
Pegomyia longicornis Huckett, Trans. Amer. Ent. Soc., LXV, p. 14, 1939.

The species /ongicornis is largely blackish in color except for the
tibiae, which are yellowish or rufous. Structurally the species may
be distinguished from other forms by the conspicuously large
third antennal segment, by the slender dimensions of parafrontals,
paratfacials and cheeks, and by the wide space between the series of

“Malloch, J. R. The Diptera collected by the Canadian Expedition, r9r3-18

(excluding the Tipulidae and Culicidae). Rep. Can. Aretic Exped., (1913-18), ut, Ins.,
pt. C., pp. 74C-75C, roro.

H. C. HUCKETT 71

presutural acrostical bristles. In the male the processes are
abruptly but inconspicuously compressed on outer border (dorsad)
to form a bare polished area that extends to apex, inner border
clothed with an inner series of dense fine hairs and an outer series
of longish setulae. In the female there is a considerable degree of
variation in extent of femoral infuscation and in development of
cruciate bristles; the caudal pair of ocellar bristles is short and
directed forward.

ALBERTA: I 9, Edmonton, May 31 1937, (E. H. Strickland), [Univ. Alberta].

BRITISH COLUMBIA: I co’, Keremeos, June 23 1923; 1 @, same locality, June 17
1923, (C. B. D. Garrett), type and allotype, [C. N. C.]. 1 &, 2 9, Lillooet, June 21
1917, (J. D. Tothill), [C. N. C.].

Pegomyia flavifrons (Walker) (Figs. 20, 83, 87.)
Eriphia flavifrons Walker, List Dipt. Brit. Mus., Iv, p. 966, 1849. Osten Sacken,
Misc. Coll. Smithsn. Inst., no. 270, p. 167, 1878. Aldrich, Misc. Coll. Smithsn.

Inst., XLVI, no. 1444, p. 536, 1905.

Pegomyia flavifrons Stein, Zeitschr. f. Hymn. Dipt., 11, hft. 4, p. 196, 1901. Stein,
Arch. f. Naturgesch., (1917), xxx, (A), hft. 1, p. 148, 1919. Huckett, Canad.
Ent., LXVI, p. 136, 1934. Séguy, Gen. Insect., fasc. 205, p. 54, 1937.

Pegomyia fringilla Malloch, Trans. Amer. Ent. Soc., XLVI, p. 181, 1920. Malloch,
Bull. Brooklyn Ent. Soc., xv, p. 126, 1920. Huckett, Mem. 77, N. Y. (Cornell)
Agr. Exp. Station, (1923), p. 44, 1924. Frison, Bull. Il]. Nat. Hist. Surv., xv1,
p. 205, 1927. Huckett, Mem. 1o1, N. Y. (Cornell) Agr. Exp. Station, (1926),
p. 840, 1928.

Pogonomyia fringilla Séguy, Gen. Insect., fasc. 205, p. 319, 1937.

There is little doubt in my mind regarding the validity of the
above synonymy after seeing the female type of flavifrons in the
British Museum of Natural History. The species structurally is
very similar to the european form albimargo (Pandellé), which
might be regarded justifiably as a variant of flavifrons. Both
species are characteristic of a small segregate within the hyoscyami-
group that may be superficially recognized by the peculiar position
of the striping on mesonotum and by the occurence of a dark mark-
ing across basal region of scutellum when viewed from behind.
On the mesonotum appear four postsutural interserial stripes, an
inner pair between the respective series of acrostical and dorso-
central bristles and an outer more deeply marked pair between the
respective series of dorsocentral and intraalar bristles.

MEM. AMER. ENT. SOC., IO

72 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

The species flavifrons does not readily conform to the characters
defining the hyoscyamt-group owing to the more restricted dimen-
sions of the head parts. However the cheeks are well maintained
caudad and the ventral region of occiput is slightly swollen, as in
that group. In the male of flavifrons the femora are nearly en-
tirely blackened and frequently the tibiae are more or less infus-
cated. In the female the thoracic markings are not so apparent
as in male, the frons at base of antennae, parafacials and cheeks
are largely reddish, the face grayish black, cruciate bristles absent,
abdomen grayish drab, fifth abdominal tergum with a few erect
discal setae, ovipositor short and weakly chitinized, densely setu-
lose on ventral surface, the femora may be largely or entirely
blackish.

ALBERTA: I o', Wabamun, July 22 1936, (E. H. Strickland), [Univ. Alberta].

IDAHO: I o, L. Waha, July 22 1927, (J. M. Aldrich), [U. S. N. M.].

MICHIGAN: I 6’, Detroit, May 24 1935, (Geo. Steyskal), [G. Steyskal].

New York: 1 4G, Ithaca, June 27 1913; I 9, Huntingdon, Long Island, August
5 1934, (Blanton & Borders). 1 9, Poughkeepsie, July 14 1926; 1 9, Honeoye
Falls, May 19 1916, (M. D. Leonard), [H. C. H.].

Ou10:1 ¢, Columbus, April 28 1902, (J. S. Hine), [U. S. N. M.].

OREGON: I 6’, I 9, Astoria, April 10 1937, (A. W. Larson), [Ore. State Col.].

PENNSYLVANIA: I co’, I 9, Swarthmore, May 5 1907, type and allotype of P.
fringilla Malloch, [A. N. S. P.].

QuEBEc: 1 9, Mutton Bay, July 11 1929, (W. J. Brown), [C. N. C.].

SouTH DaxKoTa: 1 9, Brookings, June 7 1925, (H. C. Severin), [South Dakota
State Col.].

WISCONSIN: 1 9, Madison, May 17 1919, (J. E. Dudley);1 <, Jefferson County,
May 17 1937; 1 o, Dane County, April 28 1937; 1 9, Pine Bluff, May 10 1935,
(F. M. Snyder), [Univ. Wisc.].

Pegomyia aninotata Huckett
Pegomyia aninotata Huckett, Trans. Amer. Ent. Soc., LXv, p. 15, 1939.

The male of aninotata runs in the key to near longicornis and
flavifrons, with which it agrees in having thorax, abdomen and all
femora entirely blackish. It may be separated from flavifrons by
the absence of interserial markings on mesonotum, and from
longicornis by the broader subtriangular markings of abdomen and
less widely separated series of presutural acrostical bristles.

ALBERTA: I 0’, Banff, May 29 1917, type, [C. N. C.].

H. C. HUCKETT 73

Pegomyia cognata Stein (Figs. 21, 82, 89.)
Pegomyia cognata Stein, Arch. f. Naturgesch., (1918), Lxxxiv, (A), hft. 9, p. 67,

1920. Séguy, Gen. Insect., fasc. 205, p. 54, 1937.

The species cognata belongs to the hyoscyami-subgroup, as indi-
cated by the structure of the head. The frons and face are semi-
buccate, cheeks strong and lower region of occiput swollen or
puffy. In comparison with related species, cognata has a proboscis
of more slender proportions, prealar bristle absent, third and
fourth abdominal terga with a transverse series of discal bristles,
facial margin and vibrissal angle contrastingly reddish yellow,
cephalic margin of vibrissal angle relatively heavily chitinized and
polished, 7—m cross veins faintly infuscated.

In the male the processes are sharply attenuated on distal half,
fore and mid tibiae have no mid anterodorsal bristle, second an-
tennal segment may be entirely yellowish or largely infuscated,
mid and hind femora may show a high degree of variability in
extent and intensity of infuscation, halteres at least partly tinged
with purple.

CALIFORNIA: 5 co’, Samoa Beach and dunes, Humboldt County, June 18 1907,

(J. C. Bradley), [C. U.]; 3 &, Stanford University, February 28 1906, cotypes,
[Z. M. U. B.].

Pegomyia ruficeps Stein (Figs. 22, 84, 88.)
Pegomyia ruficeps Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 286, 1898. Coquil-
lett, Invert. Pacif., Dipt., 1, p. 33, 1904. Aldrich, Misc. Coll. Smithsn. Inst.,
XLVI, no. 1444, p. 558, 1905. Stein, Arch. f. Naturgesch., (1917), Lxxx1J, (A),
hft. 1, p. 148, 1919. Stein, Arch. f. Naturgesch., (1918), Lxxxtv, (A), hft. 9, p.
72, 1920. Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 124, 1920. Huckett, Mem.
77, N. Y. (Cornell) Agr. Exp. Station, (1923), p. 47, 1924. Frost, Mem. 78, N.
Y. (Cornell) Agr. Exp. Station, (1923), p. 125, 1924. Huckett, Mem. tor, N. Y.
(Cornell) Agr. Exp. Station, (1926), p. 841, 1928. Séguy, Gen. Insect., fasc.

205, p. 61, 1937.

This small species may be distinguished from its closest relatives
by the scalelike sharply defined yellowish area at base of inner
surface of third antennal segment. The mid and hind femora are
invariably yellowish, but in order to make the widest allowance in

MEM. AMER. ENT. SOC., 10

74. NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

the use of such a character for diagnostic purposes I have included
this and other related species under both captions in male key
relating to differences in femoral coloration.

District OF CoLUMBIA: 1 o', Washington, August 5, (J. M. Aldrich), [U. S.
N. MJ.

FLORIDA: 2 o',1 9, Miami, March 19 1909, [U. S. N. M.].

LOUISIANA: I co, Opelousas, April 1897, cotype, [Field Museum].

MICHIGAN: 1 <, East Lansing, June 1 1937, (C. W. Sabrosky), [Mich. State Col.].

MINNESOTA: I 9, Rochester, June 5 1922, (H. G. Dyar), [U. S. N. M.].

NEw YORK:3 co’, 2 9, Riverhead, Long Island, August 10 1922;4 &, 3 9, same
locality, July 4 1935, ex Amaranthus retroflexus; 1 9, Ithaca, August 3 1920, I 9,
Poughkeepsie, July 14 1927, [H. C. H.].

ONTARIO: I o’, Burlington, 1919, [H. C. H.].

OREGON: 1 <’, Hood River, (Childs), [J. Wilcox].

QUEBEC: 2 o', I @, Saint Anne’s, August 6 1918, [Macdonald Col.].

TEXAS: I &, Brownsville, April 1 1909, Amaranthus retroflexus; 1 9, Denison,
June 24, (H. S. Barber), [U. S. N. M.].

WISCONSIN: I o’, Fountain City, Buffalo County, August 12-17, 1910; 1 <&,
Dane County, July 7 1937, (F. M. Snyder), [Univ. Wisc.].

Pegomyia rufescens Stein

Pegomyia rufescens Stein, Berl. Ent. Zeitschr., (1897), XL, p. 238, 1898. Aldrich,
Misc. Coll. Smithsn. Inst., XLVI, no. 1444, p. 558, 1905. Stein, Arch. f. Natur-
gesch., (1917), LXxxmII, (A), hft. 1, p. 148, 1919. Stein, Arch. f. Naturgesch.,
(1918), EXxxtv, (A), hft. 9, p. 65, 1920. Malloch, Bull. Brooklyn Ent. Soc., xv,
p. 124, 1920. Séguy, Gen. Insect., fasc. 205, p. 61, 1937.

The species resembles ruficeps, differing in that yellowish area
at base of third antennal segment is diffuse and not sharply defined.
In the female the ventral sternopleural bristle of caudal pair is well
developed and not weak or absent as in ruficeps.

ILLINOIS: I co’, Freeport, July 2 1917; 1 9, Dubois, August 9, 1917; 1 9, Algon-
quin, no date, [Ill. N. H. S.].

ONTARIO: I o*, London, 1896, cotype, [Field Museum].
WISCONSIN: I 9, Dane County, August 28 1935, (Fred Snyder), [Univ. Wisc.].

Pegomyia minuta Malloch

Pegomyia minuta Malloch, Trans. Amer. Ent. Soc., XLIv, p. 302, 1918. Malloch,
Bull. Brooklyn, Ent. Soc., Xv, p. 123, 1920. Séguy Gen. Insect., fasc. 205, p.
60, 1937.

H. C. HUCKETT 75

The head of minuta structurally resembles that of ruficeps, from
which it differs by having the third antennal segment entirely
blackish. In minuta the tarsal segments are entirely yellow, prealar
bristle absent, and unlike the male of cognata the mid tibia has a
mid anterodorsal bristle.

CALIFORNIA: I <’, Vinton, July 18 1916, (H. G. Dyar), [U. S. N. M.].

New Mexico:1 <, Alamogordo, April 14 1902, type, [A. N.S. P.].
UraH:1 9, Kelton, June 9 1930, (G. F. Knowlton), [Utah Agr. Col.].

Pegomyia vanduzeei Malloch

Pegomyia vanduzeei Malloch, Proc. Cal. Acad. Sci., rx, ser. 4, p. 307, 1919. Mal-
loch, Bull. Brooklyn Ent. Soc., xv, p. 126, 1920. Huckett, Mem. 77, N. Y.
(Cornell) Agr. Exp. Station, (1923), p. 47, 1924. Frost, Mem. 78, N. Y. (Cornell)
Agr. Exp. Station, (1923), p. 125, 1924. Huckett, Mem. 101, N. Y. (Cornell)
Agr. Exp. Station, (1926), p. 841, 1928. Séguy, Gen. Insect., fase. 205, p. 65,
1937.

Pee nce affinis Frost not Stein, Journ. Agr. Research, XVI, p. 240, 1919.

The species vanduzeet and others of the same group tend to
exhibit wide degrees of variation in color of abdomen, legs and
antennae. Their recognition and relationship may be readily con-
firmed by an examination of the structure and armature of proc-
cesses of fifth abdominal sternum in male, of which those in
vanduzeet are typical. The palpi in vanduzeei are invariably red-
dish or yellowish, whereas in haemorrhoa and the european form
versicolor (Meigen) they are fuscous.

BRITISH COLUMBIA: I 9, Vernon, August 14 1923, (D. G. Gillespie), [C. N. C.].

MANITOBA: I o, 2 2, Morden, May 31 1925, (R. M. White), [C. N. C.].

Montana: 1 9, Pipestone Pass, July 29 1923, (A. L. Melander), [A. L. M.].

NEw York: 2 <’, Ithaca, May 5 1915;1 9, May 8 1914, [H. C. H.].

Pegomyia convergens Huckett ©
Pegomyia convergens Huckett, Trans. Amer. Ent. Soc., LXV, p. 5, 1939.

The species convergens has the habitus of ruficeps, from which it
differs in having palpi broadly fuscous distad and third antennal
segment entirely black. In the male the processes bear a thickened
polished strip on distal region of inner margin. In the female
cruciate bristles are present.

MEM. AMER. ENT. SOC., 10

76 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

KANSAS: I 9, Sand dunes, Madora County, April 28 1934, (C. W. Sabrosky),
(et, (Vat

SASKATCHEWAN: I oc’, I 9, Northeast Walker, May 20 1923, type and allotype,
KES IN, Call

Pegomyia striata Stein

Pegomyia striata Stein, Arch. f. Naturgesch., (1918), Lxxxiv, (A), hft. 9, p. 71,

1920. Séguy, Gen. Insect., fasc. 205, p. 64, 1937.

The species striata is only known to me through the type, a male
from Opelousas, Louisiana, deposited in the Zoological Museum of
the University of Berlin. Its affinities are not to be readily de-
tected. I have placed the species tentatively in the hyoscyamt-
subgroup largely on account of similarities in the character of the
head. All the femora are brownish tinged in the type specimen,
being darker than tibiae, mid tibia has two fine short anterodorsal
bristles and two posterodorsal bristles situated on distal half, hind
tibia with two anteroventral bristles, abdomen depressed and sides
parallel, with a series of fuscous subtriangular marks on terga,
processes pendant and broad throughout, with only a few sparse
setulae, parafacials and cheeks are grayish drab and broadly de-
veloped, second antennal segment reddish brown, palpi entirely
fuscous.

LOUISIANA: I o’, Opelousas, March 1897, cotype, [Z. M. U. B.].

Pegomyia jacobi Malloch

Pegomyia jacobt Malloch, Ohio Journ. Science, Xx, p. 272, 1920. Malloch, Bull.

Brooklyn Ent. Soc., Xv, p. 126, 1920. Séguy, Gen. Insect., fasc. 205, p. 59, 1937.

I know the species only from the type specimen, a male taken
in Alaska by J. S. Hine, which is deposited in the collections of
Ohio State University. The species belongs to the bicolor-sub-
group, having the same type of processes as in the male of bzcolor
and also possessing a robust apical posterodorsal bristle on hind
tibia as in that species. However in jacobi the antennae, palpi
and abdomen are entirely and all femora largely blackish, mid
tibia has a weak bristle on anterior surface, and the series of para-
frontal bristles extend caudad to vertex of head.

ALASKA: I o, Katmai, July 1917, (J. S. Hine), type, [Ohio State Univ.].

H. C. HUCKETT Tal

Pegomyia indicta Huckett
Pegomyia indicta Huckett, Trans. Amer. Ent. Soc., LXv, p. 3, 1939.

The species indicta has the habitus of hyoscyami and allied
forms, from many of which it may be readily separated in the male
by the broadly truncated processes, narrower frons, and absence
of a bristle at middle of anterodorsal surface of mid tibia. In these
respects the male agrees with that of carduorum, from which it
may be distinguished by the darker color of abdomen, femora and
second antennal segment.

ALASKA: 1 o, Katmai, June 10 1919, (J. S. Hine), type [Ohio State Univ.].

Pegomyia atlanis Huckett
Pegomyia atlanis Huckett, Trans. Amer. Ent. Soc., LXV, p. 4, 1939.

The species atlanis belongs to the hyoscyami-subgroup as de-
noted by the broadly developed head sclerites. The processes in
male are structurally similar to those of ruficeps and convergens.
The species has all femora largely infuscated, second antennal
segment extensively blackish, palpi entirely blackish, thorax and
abdomen with well marked dorsocentral vitta, and distal section
of proboscis notably short and fleshy.

NEw YorRK: 1 6, 1 @, Orient, Long Island, June 6 1936, type and allotype,

[A. N.S. PJ. 1 9, Babylon, Long Island, June 9 1936; 1 92, June 15 1936, [H.
C. JAlclk

Pegomyia juvenilis (Stein)

Hylemyia juvenilis Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 211, 1898. Howard,
Proc. Wash. Acad. Sci., 11, p. 584, 1900. Aldrich, Misc. Coll. Smithsn. Inst.,
XLVI, no. 1444, p. 552, 1905. Huckett, Ann. Ent. Soc. Amer., XIv, p. 308, 1921.
Séguy, Gen. Insect., fasc. 205, p. 98, 1937.

Pegomyia juvenilis Stein, Arch. f. Naturgesch., (1917), Lxxx11, (A), hft. 1, p. 148,
1919. Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 124, 1920. Stein, Arch. f.
Naturgesch., (1918), LxxxtIv, (A), hft. 9, p. 72, 1920. Huckett, Mem. 77, N. Y.
(Cornell) Agr. Exp. Station, (1923), p. 45, 1924. Johnson, Occ. Pap. Boston
Soc. Nat. Hist., vil, p. 232, 1925. Johnson, Insect Fauna, Biol. Surv. Mt.
Desert Region, p. 210, 1927. Huckett, Mem. to1, N. Y. (Cornell) Agr. Exp.
Station, (1926), p. 840, 1928.

The species juventlis is closely related to palposa (Stein) and the
european form virginia (Meigen), from both of which it may be
readily distinguished by the yellow legs. All three species are

MEM. AMER. ENT. SOC., IO .

78 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

characterized by having arista plumose, apical setulae of scutellum
hairlike, processes of fifth abdominal sternum in male armed with
a matt of dense setulae, cruciate bristles present, and palpi spatu-
late in female.

District OF COLUMBIA: I 9, Rock Creek, June 5 1925, (J. M. Aldrich), [U. S.
N. M.].

ILLINOIS: I co’, Dubois, May 23 1917, [Ill. N. H. S.].

MAINE: I oc’, Mount Desert, June 10 1921, (C. W. Johnson), [U. S. N. M.].

MARYLAND: 2 oc’, Plummers Island, August 3 1912; 2 &, Glen Echo, July 23
1921, (J. R. Malloch); 1 #, Cabin John, May 18 1915; 1 o, Chesoch, May 30,
(J. M. Aldrich), [U. S. N. M.].

New HampsuirE: 4 92, Noxon Camp, July 6 1931, (J. M. Aldrich), [U.S. N. M.].

NEw JERSEY: I 9, Trenton, August 5, [A. N.S. P.].

New York: 1 <’, Lakeville, Long Island, May 16 1921; 2 &, Middle Island,
Long Island, May 30 1931; 1 @, Cold Spring Harbor, Long Island, September 10
1921; 1 9, Riverhead, Long Island, July 3 1927; 1 o, Orient, Long Island, June
20 1936; 1 o, Babylon, Long Island, June 26 1935; 1 &, Buttermilk, near Ithaca,
July 18, 1920; 1 &, 3 @, Ringwood, near Ithaca, June 13 1922; 1 a’, Ithaca, May
28 1922:1 9, Harmon, July 6 1926, (H.C. H.]. 19 o, Wilmington Notch, Adiron-
dacks, July 2 1922, (J. M. Aldrich), [U. S. N. M.].

OuIo: 3 o’, Ira, no date, (J. S. Hine); 1 9, Vinton, June 5-12 1900; 1 <,
Columbus, May 30 1901, [U. S. N. M.].

PENNSYLVANIA: I o', Natrona, July 141894, cotype, [Field Museum]. 3 <,
Westmoor County, July, [Carnegie Museum]. 3 <, Delaware County, June 12
1894, [U. S. N. M.]. 1 &, Roxborough, Philadelphia, June 7; 1 ?, Pocono Lake,
August 21; 1 o, Germantown, Philadelphia, May 20, [A. N.S. P.].

SoutH Daxora: 1 <, Elk Point, June 18 1924, [South Dakota State Col.].

TEXAS: I o’, College Station, June 13 1919, [Texas A. & M. Col.].

VIRGINIA: I 2, Occoquan, May 27 1923, (J. M. Aldrich), [U. S. N. M.].

WEST VIRGINIA: I 9, Cheat River, June, [Carnegie Museum].

WISCONSIN: I co’, Dane County, May 16 1936, (F. M. Snyder), [Univ. Wisc.].
1 @, Brule River, Douglas County, August 23, (Witmer Stone), [A. N.S. P.].

Pegomyia connexa Stein

Pegomyia connexa Stein, Arch, f. Naturgesch., (1918), May, Lxxxiv, (A), hft. 9,
p. 68, 1920. Huckett, Mem. 77, N. Y. (Cornell) Agr. Exp. Station, (1923), p.
43, 1924. Johnson, Occ. Pap. Boston Soc. Nat. Hist., vil, p. 232, 1925. Johnson,
Insect Fauna, Biol. Surv. Mt. Desert Region, p. 209, 1927.. Huckett, Mem. 101,
N. Y. (Cornell) Agr. Exp. Station, (1926), p. 840, 1928. Séguy, Gen. Insect.,
fasc. 205, p. 54, 1937.

Pegomyia emmesia Malloch, Trans. Amer. Ent. Soc., XLVI, p. 179, 1920. Malloch,
Bull. Brooklyn Ent. Soc., Xv, p. 125, 1920. Frison, Bull. Ill. Nat. Hist. Surv.,
XVI, p. 205, 1927.

H. C. HUCKETT 79

Pogonomyia emmesia Séguy, Gen. Insect., fasc. 205, p. 319, 1937.

The species connexa has little in common with its congeners from
North America known to me. It bears a striking resemblance to
the european species P. socculata (Zetterstedt), from which it
differs in having femora yellowish and not entirely blackened.
The species has arista subplumose and mesonotum darkly streaked
along declivities as in /zpsza; in male the hind tibia invariably has
a short bristle on proximal half of posterior surface, and in female
the caudal pair of ocellar bristles is longish and directed outward,
fifth abdominal tergum has discal bristles.

ALBERTA: I 9, Edmonton, August 18 1936, (E. H. Strickland), [Univ. Alberta].

District OF COLUMBIA: 1 o’, Anacostia, May 13 1911, (P. Y. Myers), [U. S.
N. M.].

ILLINOIS: I co’, Savanna, June 14 1917; I @, same locality, June 11 1917, (J. R.
Malloch), type and allotype of emmesia Mall., [Ill. N. H. S.].

MAINE: I 9, Echo Lake, Mount Desert, June 1917, (C. W. Johnson), [U. S.
N. M.].

MARYLAND: I co’, Plummers Island, April 7 1907, (W. L. McAtee), [U. S. N. M.].

MIcHIGAN: 1 9, Hamburg, Livingston County, July 19 1936, (Geo. Steyskal),
[G. Steyskal].

MINNESOTA: I 9, Duluth, St. Louis County, July 6-8, (Witmer Stone), [A. N.
Smal:

NEw HampsHIRE: 1 9, Noxon Camp, 2000 ft. alt., July 5 1931, (J. M. Aldrich),
[U. S. N. M.].

New YorkK:1 <o’, Riverhead, Long Island, May 15 1924; 2 o, Hempstead, Long
Island, May 4 1921;1 2, Orient, Long Island, June 6 1936; 1 o, Lake Ridge, near
Ithaca, May 6 1922;1 9, Coy Glen, near Ithaca, June 12 1920; 2 o’, Ithaca, May
15 1915; 2 o', McLean Bogs, McLean, May 17 1922;1 9, Taughanic, near Ithaca,
June 21 1920, (Leonard); 2 <7, Ellis Hollow, near Ithaca, May 24 1922, [H. C. H.].
3 2, Greene County, August, [Carnegie Museum].

Ouro: 1 @, Ira, no date; 1 <, Vinton, June 5-12 1900, (J. S. Hine), [U. S. N. M.].

ONTARIO: I o', Ottawa, May 23 1927, (C. H. Curran); 1 =, Niagara Glen, June
10 1926; 1 <, Point Pelee, July 25 1925, (G. S. Walley), [C. N. C.].

PENNSYLVANIA: 2 o', Westmoor County, no date; 2 9, Alleghany County, June,
[Carnegie Museum]. 1 &, Philadelphia, September 14 1891, [U. S. N. M.].

QUEBEC: I o’, Abbotsford, September 1 1936, (G. Shewell), [C. N. C.].

WASHINGTON: I o’, Big Four Mountain, July 1 1924, (A. L. Melander), [A. L. M.].

WISCONSIN: I o?, Dane County, May 21 1936, (F. M. Snyder), [Univ. Wisc.].
I 9, Brule River, Douglas County, August 13, (Witmer Stone), [A. N.S. P.].

MEM. AMER. ENT. SOC., 10

80 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Pegomyia partita Huckett
Pegomyia partita Huckett, Trans. Amer. Ent. Soc., LXV, p. 33, 1939.

The species partita is only known to me in the female sex. In
structure the species is allied to /abradorensis Malloch and the
european form semirufa Ringdahl, from both of which it differs by
having the palpi and antennae blackish.

ALBERTA: I 9, Banfi, August 30 1922, (C. B. D. Garrett), type, [C. N. C.].

IDAHO: I 2, Mountains, Moscow, July 25 1920, (R. C. Shannon), [H. C. H.].

WASHINGTON: I 2, White River, Mount Rainier, July 20 1924, paratype; I 9,
Yakima Park, Mount Rainier, July 22 1924, (A. L. Melander), [A. L. M.].

Pegomyia labradorensis Malloch

Pegomyia labradorensis Malloch, Trans. Amer. Ent. Soc., XLVI, p. 176, 1920.
Malloch, Bull. Brooklyn Ent. Soc., xv, p. 124, 1920. Frison, Bull. Ill. Nat.
Hist. Surv., XVI, p. 206, 1927. Johnson, Psyche, XXXVI, p. 143, 1929.

Pogonomyia labradorensis Séguy, Gen. Insect., fasc. 205, p. 319, 1937.

The female of the species labradorensis, partita and the european
form semirufa Ringdahl has the abdomen black and thorax reddish
yellow. In the male the reddish abdomen may have a fuscous
tinge. All three species have a strong bristle on distal half of
anteroventral surface of mid femur. The male of labradorensis
invariably has a bristle on proximal half of posterior surface of
hind tibia and in neither sex is there a bristle at middle of antero-
ventral surface of mid tibia. It is not unlikely that /abradorensis
and semirufa may eventually be found to be the same species.

ALASKA: I o', Camp 327, Alaska “Eng. Comm.,” July 31 1921, (J. M. Aldrich),
[U. S. N. M.].

ALBERTA: I 9, Waterton, July 13 1923, (E. H. Strickland), [Univ. Alberta].

LABRADOR: I o’, Nain, August 1918, type, [Ill. N. H. S.].

Pegomyia lividiventris Huckett
Pegomyia lividiventris Huckett, Trans. Amer. Ent. Soc., LXV, p. 29, 1939.

The species lividiventris may readily be distinguished from allied
forms in the ipsia-group by the more or less reddish tinge to ab-
domen. Structurally it comes closest to fuscicauda, and notably
in the male sex. It differs chiefly from the latter species in having
antennae largely yellowish, humeral callosities reddish, palpi en-

H. C. HUCKETT 8I

tirely yellowish and abdomen reddish translucent. The female of
lividiventris has the fore tarsal segments uniformly slender as on
mid tarsus, and mid tibia has an anteroventral bristle, whereas in
fuscicauda the third and fourth fore tarsal segments are conspicu-
ously broadened and mid tibia has no mid anteroventral bristle.

BritisH CoLuMBIA: 1 9, Nicola, May 7 1923, (E. R. Bucknell), [C. N. C.].

CALIFORNIA: I <’, Falls, Forest Home, San Bernardino County, September 21
1935, (A. J. Basinger), type, [A. N.S. P.]. 1 9, Mount Home Canyon, San Ber-
nardino Mts., June 8 1924, (J. M. Aldrich), allotype; 1 ~, Gold Lake Camp, Plumas
County, July 20 1916, (H. G. Dyar), (U.S. N. M.]. 1 9, Cuyamaca Mountains,
San Diego County, August 16 1914, (J. C. Bradley), [C. U.].

IDAHO: I o’, Waha, May 30 1924, (A. L. Melander), [A. L. M.].

NEVADA: I o’, Tahoe Lake, (small lake, top of grade), October 5 1935, (A. J.
Basinger), [A. J. Basinger].

WASHINGTON: I 9, Olympia, June 4 1932, (C. H. Martin), [H. C. H.]. 1 9,
Creston, June 27 1924, (A. L. Melander), [A. L. M.].

Pegomyia rumicifoliae new name

Pegomyia calyptrata Frost (not Stein), Journ. Agric. Research, XvI, p. 229-240,
1919. Malloch, Bull. Brooklyn Ent. Soc., xv, p. 123, 1920. Huckett, Ann. Ent.
Soc. Amer., XIV, p. 312, 1921. Huckett, Mem. 77, N. Y. (Cornell) Agr. Exp.
Station, (1923), p. 43, 1924. Frost, Mem. 78, N. Y. (Cornell) Agr. Exp. Station,
(1923), p. 100, 1924. Johnson, Occ. Pap. Boston Soc. Nat. Hist., vil, p. 232, 1925.
Johnson, Insect Fauna, Biol. Surv. Mt. Desert Region, p. 209, 1927. Huckett,
Mem. 1o1, N. Y. (Cornell) Agr. Exp. Station, (1926), p. 840, 1928.

I have come to the conclusion that the species A nthomyza calyp-
trata Zetterstedt has yet to be correctly recorded as occurring in
North America. I find that the specimens from Illinois and Mas-
sachusetts on which Stein (1898) partly based his knowledge of
calyptrata do not belong to that species but are identical with those
of triseta Malloch. Frost (1919) reared specimens of what he be-
lieved to be calyptrata from the leaves of Rumex obtusifolius and
R. crispus, and this is the species that has come to be commonly
recorded as calyptrata in recent North American literature. An-
other pegomyian species has been reared from Rumex obtusifolius
in Europe, to which Hendel*® has given the name P. rumicicola.

35 Hendel, F. Neue europdische Minierfliegen (8. Beitrag zur Blattminenkunde
Europas). Konowia, iv, hft. 5, p. 301-309, 1925.

MEM. AMER. ENT. SOC., 10

82 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

The adult flies of this species differ from those reared by Frost in
having the antennae, palpi, abdomen and legs black. In many
respects the North American species agrees with the characters
ascribed to flavoscutellata (Zetterstedt), a european form whose
identity still remains a matter of considerable uncertainty. Ring-
dahl (1938) has however concluded that the species calyptrata
(Zetterstedt) and P. iniqua Stein are identical, the latter having
been described from specimens reared from Agaricus campestris.
If this synonymy be accepted then it is apparent that Zetterstedt’s
species is not the same as that which has recently been recorded
from North America as calypirata.

I have renamed Frost’s leaf-mining species Pegomyia rumict-
foliae, in view of the apparent error in identification. The species
differs from calyptrata in having a longer prealar bristle, more
closely approximated series of acrostical bristles, larger and more
strongly bristled processes in male, being similar to nzgritarsis in
this respect, and by the absence of cruciate bristles in female. I
have placed rumicifoliae and nigritarsis in the same subgroup, the
former species differing from the latter in having palpi yellow,
scutellum and third antennal segment partly yellow. The two
species differ from bicolor and triseta in structure and bristling of
male processes and by the weaker development of apical postero-
dorsal bristle of hind tibia in both sexes. In all such species there
occurs not infrequently a certain degree of blackish suffusion in
the abdomen, which may become so extensive in extreme cases as
to nearly mask the normal reddish color. In rumicifoliae the pre-
alar bristle may be slightly longer or shorter than anterior noto-
pleural bristle, and humeral callosities in male may be black or
apparently yellowish testaceous.

MASSACHUSETTS: I 9, Brookline, Aug. 25.

NEw JERSEY: I 9, Trenton, July 2, [A. N.S. P.].

NEw YORK: 3 co’, 3 @, Ithaca, September 9, 1902 (ex Rumex crispus);1 9, Coy
Glen, near Ithaca, May 14 1922;1 co’, McLean Bogs, McLean, May 7 1922, [H. C.
H.].

ONTARIO: I co, Trenton, September 9 1902, (Evans). 1 o, Burlington, 1919.
I 9, Ottawa, June 18 1916, [H. C. H.]. 1 &, 1 9Q, Ottawa, July 5 1938, (G. E.

He Cy HUCKEDT 83

Shewell); 1 @, Low Bush, Lake Abitibi, June 4 1925, (N. K. Biggio: TOs,
Orillia, June 10 1925, (C. H. Curran), [C. N. C.].

QUEBEC: I 9, Fairy Lake, June 1 1927, (G. S. Walley), [C. N. ch

RHODE ISLAND: I oc’, Newport, [A. N.S. P.].

WISCONSIN: I 9, Dane County, July 26 1937, (F. M. Snyder), [Univ. Wisc.].

Pegomyia nigritarsis (Zetterstedt)

Anthomyza nigritarsis Zetterstedt, Ins. Lapp., p. 696, 1838.

Pegomyia nigritarsis Stein, Kat. Paldark. Dipt., m1, p. 705, 1907. Schnabl, Hor.
Soc. Ent. Ross., XXXIV, p. 8, 9, 1910. Schnabl, Deutsch. Ent. Zeitschr., hft. 6,
p. 82, 1911. Stein, Arch. f. Naturgesch., (1915), (A), hft. 10, p. 126, 1916.
Ringdahl, Trémso Museums Arshefter, (1926), xLtx, hft. 3, p. 32, 1928. Karl,
Tierwelt Deutschlands, x11, pt. 3, p. 138, 1928. Curran, Bull. Amer. Mus. Nat.
Hist., LXI, p. 85, 1930. Ringdahl, K. Svensk. Veten. Kap. Akad. Skrift. Natur-
skyddsarenden, nr. 18, p. 21, 1931. Tiensuu, Acta Soc. Faun. Flor. Fennica,
LVIII, no. 4, p. 29, 1935. Séguy, Gen. Insect. fasc. 205, p. 60, 1937.

Pegomyia (Pegomyia) nigritarsis Schnabl and Dziedzicki, Abh. K. Leop.-Carol.
Deutsch. Akad. Naturforsch., Xcv, nr. 2, p. 112, 1911. Séguy, Faune de France,
VI, p. 163, 1923. Ringdahl, Ent. Tidskr., LIx, p. 199, 1938.

The males of nigritarsis and rumicifoliae have broad lamellate
processes which are fringed along entire inner margin by a dense
series of slender setulae. The male specimen before me from
Alaska differs from the normal form of nigritarszs in that humeral
callosities and scutellum are partly yellowish.

ALASKA: I <’, Katmai, June, 1917, (J. S. Hine), [Ohio State Univ.].

Pegomyia costalis Stein

Pegomyia costalis Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 243, 1898. Coquillett,
Proc. Wash. Acad. Sci., 0, p. 451, 1900. Coquillett, Psyche, 1x, p. 150, 1901.
Aldrich, Misc. Coll. Smithsn. Inst., xLv1, no. 1444, p. 558, 1907. Stein, Arch. f.
Naturgesch., (1917), Lxxxim, (A), hft. 1, p. 148, 1379. Stein, Arch. f. Natur-
gesch., (1918), Lxxxiv, (A), hft. 9, p. 64, 1920. Séguy, Gen. Insect., fasc. 205,
D- 54, 1937.

The male of costalis resembles that of substriatella, from which
it may be distinguished by the longer costal setulae, longer pubes-
cence of arista, and yellow halteres. The species is only known to
me through the type which was taken at Brookings, South Dakota,
and is deposited in the Field Museum at Chicago.

MEM. AMER. ENT. SOC., 10

84 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Pegomyia substriatella (Malloch) (Figs. 12, 45, 73.)
Hylemyia substriatella Malloch, Trans. Amer. Ent. Soc., XLIv, p. 309, 1918. Frison,
Bull. Ul. Nat. Hist. Surv., xvi, p. 203, 1927. Séguy, Gen. Insect., fasc. 205, p.

116, 1937.

Pegomyia substriatella Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 125, 1920.

The species substriatella is more robust than costalis, and lacks
the series of prominently long costal setulae. In the female of
substriatella the fore tarsal segments are slender. Both costalis
and substriatella may be distinguished from the allied form quadr1-
spinosa by their reddish second antennal segment, strongly de-
veloped apical posterodorsal bristle on hind tibia, and by the lack
of a bristle on distal half of anteroventral surface of mid femur.
In the male of costalis and substriatella the abdominal sterna have
numerous erect slender bristles, whereas in quadrispinosa the
sterna possess a few unnoteworthy bristles.

DISTRICT OF COLUMBIA: I &, I 9, Washington, October 29, 1926, (N. K. Bige-
low), [U. S. N. M.].

MARYLAND: I o’, Glen Echo, October 22 1926, (N. K. Bigelow); 1 o, Hyatts-
ville, October 26 1916, (B. P. Currie); 1 9, Cabin John, October 30 1926, (J. M.
Aldrich), [U. S. N. M.].

OHIO: 1 &, Columbus, October 4, [U. S. N. M.].

VIRGINIA: I c*, Dead Run, Fairfax County, October 28 1915, (R. C. Shannon),
{H.C.H.]. 1 o&, Falls Church, October 14 1913, (C. T. Greene), type, [Ill. N. H.S.].
I &, Great Falls, October 23 1920, (J. M. Aldrich), [U.S. N. M.].

Pegomyia flavicans (Stein)

Hylemyia flavicans Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 213, 1898. Aldrich,
Misc. Coll. Smithsn. Inst., XLVI, no. 1444, p. 552, 1905.

Pegomyia flavicans Stein, Arch. f. Naturgesch., (1917), Lxxx1tt, (A), hft. 1, p. 148,
1919. Stein, Arch. f. Naturgesch., (1918), Lxxxiv, (A), hft. 9, p. 65, 1920.
Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 125, 1920. Séguy, Gen. Insect., fase.

205, P- 54; 1937.

The species flavicans structurally is similar to quadrispinosa,
from which it differs in being paler in color, in having second an-
tennal segment and part of third reddish, and by the yellow palpi.
The species is known to me through the cotype series, two males
and a female taken in South Dakota. One male cotype is depos-
ited in the United States National Museum, the other two speci-
mens in the Zoological Museum of the University of Berlin.

H. C. HUCKETT 85

I am doubtful whether the male and female cotypes at Berlin
are conspecific owing to the fact that the female specimen lacks
the diagnostic characters of the mid femur and fore tibia, which I
regard to be of specific importance. A female specimen from
Manitoba, which I believe to be conspecific with the male cotypes,
has a bristle present on distal half of anteroventral surface of mid
femur and at apex of posterodorsal surface of fore tibia, as in male.

Pegomyia tarsata (van der Wulp) (Figs. 16, 43, 76.)
Anthomyia tarsata van der Wulp, Tijdschr. Ent., x, p. 151, 1867. Osten Sacken,
Misc. Coll. Smithsn. Inst., m1, p. 168, 1878. Aldrich, Misc. Coll. Smithsn. Inst.,

XLVI, no. 1444, p. 551, 1905.

The species tarsata was described by van der Wulp (1867) from
two female specimens taken in Wisconsin, which are preserved in
the ’S Rijks Museum at Leyden. One of the specimens is, in my
opinion, identical with Anthomyia lipsia Walker, and the other
belongs to a different species. There is little to indicate from the
material itself or from the description of tarsata as to which speci-
men may have been the chief source for the description. It seems
probable that both specimens were consulted for this purpose.
The specimen not ipsia differs from lipsia in having parafacials
and cheeks broader, mesonotum with no conspicuous blackish
streaks along declivities, fore tibia with a robust apical postero-
dorsal bristle, mid tibia with a weak mid anteroventral bristle.
This specimen I designate the lectotype of tarsata van der Wulp.

I have little doubt but that the series of females before me be-
long to this species, the chief apparent difference being that the
wings are more yellowish tinged than in lectotype. In addition,
the male is recorded from collections made in Wisconsin and
Manitoba. It differs from that of psza in that the processes are
entirely yellowish, fore tibia has a robust apical posterodorsal
bristle, and eyes are separated by a distance greater than diameter
of anterior ocellus.

In both anorufa Stein and subgrisea Malloch the processes are
yellowish as in tarsata, but the males of the two former species
differ from that of the latter in having a bristle on distal half of

MEM. AMER. ENT. SOC., 10

86 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

anteroventral surface of mid femur, second antennal segment
partly blackish, and eyes more widely separated at narrowest part
of frons.

ALASKA: 1 @, Nenana, June 27 1921, (J. M. Aldrich), [U.S. N. MJ]. 1 9,
Katmai, August 1917, (J. S. Hine), [Ohio State Univ.].

ALBERTA: I 9, Edmonton, June 7 1935;1 9, Elk Island, August 4 1923, (E. H.
Strickland); 1 «#, Cooking Lake, May 24 1937; 1 9, Wetaskiwin, June 6 1937,
(F. O. Morrison), [Univ. Alberta].

MANITOBA: I co’, Aweme, May 6 1925, (R. D. Bird); 1 &, Teulon, August 1
1924, [C. N. C].

NEw BRUNSWICK: I 9, Frederickton, September 24 1914, (F. M. McKenzie),
Ce INT Calk

Ontario: 1 9, Macdiarmid, Lake Nipigon, September 11 1923, (N. K. Bigelow),
[C. N. C.J]. 1 o@, Waubamick, June 1915, (H. S. Parish), [A. L. M.].

QUEBEC: I 9, Queens Park, Aylmer, July 14 1926, (C. B. Hutchings), [C. N. C.].

SASKATCHEWAN: I 9, Saskatoon, June 23 1926, (K. M. King), [C. N. C.].

SoutH Dakota: 1 9, Spearfish, August 2 1924, [H. C. H.].

WISCONSIN: I o', Madison, May 16 1938; 1 &, Dane County, July 7 1936, (F.
M. Snyder). 1 9, Racine, May 23 1932, [Univ. Wisc.].

Pegomyia cresca Huckett
Pegomyia cresca Huckett, Trans. Amer. Ent. Soc., LXV, p. 30, 1939.

The species cresca is related to tarsata, differing in that the male
processes are blackish and concolorous with abdomen, second and
third fore tarsal segments in female more restricted in size. Allied
forms include duplicata (Malloch) and longimana (Pokorny), in
both of which the second antennal segment is largely blackish and
fore tarsal segments in female are slender, as in mid tarsus.

ALASKA: I co’, Healey, June 24 1921, (J: M. Aldrich), [U. S. N. M.].

ALBERTA: I o’, Banff, June 9 1922; 1 9, Waterton Lakes, June 19 1923, (J.
McDunnough); 1 <1, I 9, Waterton, July 13 1923, (H. L. Seamans), [C. N. C.].
I o', Gull Lake, July 7 1932, (E. H. Strickland), paratype, [A. N.S. P.].

BriTISsH COLUMBIA: I o’, Cranbrook, June 3 1926, (A. A. Dennys), type; 1 9,
Keremeos, July 31 1923, (C. B. D. Garrett), allotype, [C. N. C.]. 1 &, Hedley,
July 20 1923. I 92, Carbonate to Columbia River, July 7-12 1908, 2600 ft. alt.,
(J. C. Bradley), [C. U.]. 1 9, Mount Cheam, August 15 1901, [H. C. H.].

CoLorapo: 1 9, Lake City, August 15 1936, 8700 ft. alt.; 1 «, Boulder County,
June 18-July 19 1933, 9500 ft. alt., (J. C. Jones), [Univ. Wisc.].

IpAHO: 1 9, Potlatch, May 28 1930, (J. M. Aldrich), [U. S. N. M.].

SoutH Dakora: 1 o, Spearfish, July 28 1924;1 9, Custer, July 19 1924, [South
Dakota State Col.].

H. C. HUCKETT 87

WASHINGTON: I o’, Asotin, May 11 1923, (A. L. Melander), [A. L. M.].

WYOMING: I o, Yellowstone National Park, Old Faithful, August 11 1927,
(J. M. Aldrich), [U. S. N. M.]. 1 &, Yellowstone National Park, Norris Basin,
July 26 1923, (A. L. Melander), [A. L. M.].

Pegomyia lipsia (Walker)

Anthomyia lipsia Walker, List Dipt. Brit. Museum, Iv, p. 928, 1849. Osten
Sacken, Misc. Coll. Smithsn. Inst., no. 270, p. 168, 1878.

Anthomyia substituta Walker, List Dipt. Brit. Museum, Iv, p. 971, 1849.

Hylemyia lipsia Slosson, Ent. News, VI, p. 6, 1895. Stein, Berl. Ent. Zeitschr.,
(1897), XLU, p. 209, 1898. Stein, Zeitschr. Hymn. Dipt., 11, p. 200, 1g01. Al-
drich, Misc. Coll. Smithsn. Inst., xLvi, no. 1444, p. 552, 1905. Smith, Ann.
Rept. N. J. State Museum, 1909, p. 791, 1910. Huckett, Ann. Ent. Soc. Amer.,
XIV, p. 309, 1921. Cole and Lovett, Proc. Cal. Acad. Sci., x1, p. 312, 1921.

Pegomyia lipsia Stein, Arch. f. Naturgesch., (1917), Lxxxin, (A), hft. 1, p. 148,
1919. Stein, Arch. f. Naturgesch., (1918), Lxxxiv, (A), hft. 9, p. 72, 1920.
Malloch, Bull. Brooklyn Ent. Soc., xv, p. 125, 1920. Huckett, Mem. 77, N. Y.
(Cornell) Agr. Exp. Station, (1923), p. 45, 1924. Johnson, Occ. Pap. Boston Soc.
Nat. Hist., vu, p. 232, 1925. Huckett, Mem. tor, N. Y. (Cornell) Agr. Exp.
Station, (1926), p. 840, 1928. Curran, Bull. Amer. Mus. Nat. Hist., Lx1, p. 85,
1930. Huckett, Can. Ent., LXvI, p. 137, 1934. Séguy, Gen. Insect., fasc. 205,
P. 59; 1937.

The species /zpsia has the second and base of third antennal seg-
ment and fore coxae broadly yellowish, palpi deeply infuscated
distad, fore tibia has no robust apical posterodorsal bristle. In
the male the ventral surface of abdomen is densely clothed with
uniformly fine erect setulae, and second and third sterna are sub-
quadrate in outline. In female the mesonotum when viewed from
behind has a prominent blackish streak along the declivities,
third and fourth fore tarsal segments greatly enlarged and mid
tibia has no mid anteroventral bristle. The species may be dis-
tinguished invariably from its closest relatives by the lack of a
robust apical posterodorsal bristle on fore tibia, and in the male
sex by the closely approximated eyes at narrowest part of froms
and by the fine denser vestiture on ventral surface of abdomen.

ALBERTA: I co’, Wabamun, June 27 1936; 1 9, Edmonton, September 1 1936,
(E. H. Strickland); 1 @, same locality, August 22 1937, (F. O. Morrison), [Univ.
Alberta].

ARIZONA: I oc’, Santa Rita Mountains, May 20 1898, (Schwarz), [U. S. N. M.].

CONNECTICUT: 10 co’, Woodbury, June 8 1931; I o, Redding, June 11 1929,
(A. L. Melander), [A. L. M.].

MEM. AMER. ENT. SOC., IO

88 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

ILLINOIS: I o', Algonquin, no date, [U. S. N. M.].

INDIANA: 1 o’, Lafayette, May 2 1917, [U. S. N. M.].

MARYLAND: I o, Plummers Island, April 22 1903, [U. S. N. M.].

MASSACHUSETTS: I o’, Barnstable, August 19 1926, (A. L. Melander), [A. L.
M.|}

MICHIGAN: I co’, South Haven, June 23 1938; 1 o’, Saint Joseph, May 30 1928,
(C. W. Sabrosky), [Mich. State Col.].

NEw BRUNSWICK: 1 9, Kentville, July 18 1923, (R. P. Gorham), [C. N. C.].

NEw HAMPSHIRE: I 9, White Mountains, no date, (Morrison), [U. S. N. M.].
1 o, Banton, July 6, (A. L. Melander), [A. L. M.].

NEw YorkK:1 a, Lake Placid, July 28 1929, (A. L. Melander), [A. L. M.]. 4 2
Taughanic Falls, near Ithaca, August 14 1928; 2 o, Coy Glen, near Ithaca, May
23 1922; 3 of’, Ithaca, May 28 1922; 1 9, Montezuma Marsh, Cayuga County,
July 1 1920; 1 o&, Lakeside Park, August 8 1921, (M. D. Leonard); 1 7, 1 2,
Ringwood, near Ithaca, August 17 1928, [H.C.H.]. 2 &,2 9, Onteora Mountains,
Greene County, 1929, (L. O. Howard), [U.S. N. M.]. 1 &, Poughkeepsie, May 12
1910; I o&, I 9, Riverhead, Long Island, August 20 1922; 1 &, Babylon, Long
Island, May 22 1935;1 9, West Hills, Long Island, June 1 1935; 1 9, Farmingdale,
Long Island, June 14 1935, (F. S. Blanton); 1 «, Yaphank, Long Island, August 8
1926, [H. C. H.].

Oxu10: 1 &, Amherst, July 1933, (H. J. Reinhard), [Texas A. & M. Col.]. 1 &,
Cuyhga Fls., August ro 1904, [U. S. N. M.].

ONTARIO: I o, Niagara Glen, June 15 1926, (G. S. Walley); 1 &, Spencerville,
June 10 1936, (G. E. Shewell); 1 9, Waubamick, June 1915, (H. S. Parish), [A.
L. M.].

PENNSYLVANIA: 5 co’, 1 9, Westmoor County, July; 1 9, Ohio Pyle, August 10
1905, (Carnegie Museum). 1 o’, Philadelphia, July 5 1934; 1 o& Broomall, May
13 1934, (D. E. Hardy), [Brigham Young University]. 2 co, Dubois, September 3
1927; 1 o, Mineral Spring, September 5 1927, (A. L. Melander), [A. L. M.]. 3 <,
Wernersville, August 15, [A. N.S. P.].

QUEBEC: I 9, Quebec, August 5 1930, (A. L. Melander), [A. L. M.]. 1 o,
Aylmer, August 16 1926, (C. H. Curran); 1 &, Abbotsford, June 1935, (G. E.
Shewell), [C. N. C.].

VIRGINIA: 2 o', Chain Bridge, September 11 1921; 2 o&, Turkey Run, October
1921 (J. R. Malloch), [U. S: N. M.].

WEST VIRGINIA: I 9, Cheat River, June, [Carnegie Museum].

WISCONSIN: 2 o, lowa County, August 25 1935; 6 o&, Dane County, May 16
1936;1 9, Devils Lake, May 30 1936; 2 o, Madison, May 13 1936, (F. M. Snyder),
[Univ. Wisc.]. 1 9, Salmo, Bayfield County, August 12 1919, [U. S. N. M.].

Pegomyia chrysida Huckett
Pegomyia chrysida Huckett, Trans. Amer. Ent. Soc., LXV, p. 27, 1939.

Bl, (Cy UG aTe 89

The species chrysida and fuscicauda evidently possess much the
same range in geographical distribution and they also have much
in common in general appearance. In chrysida the second antennal
segment, proximal area of third segment, fore coxae and greater
part of palpi are yellowish, whereas in fuscicauda these sclerites
are largely blackish or fuscous. In the keys chrysida and lipsia
are intimately associated. However the former species may be
readily distinguished from the latter by the clouded cross veins
and less intensively tinged wing membrane, and in the male by
the sparser vestiture on ventral surface of abdomen and narrower
sternal sclerites.

ARIZONA: I 9, Cave Creek Canyon, Chiricahua Mts., 5500 ft. alt., no date,
allotype, [A. N.S. P.]. 1 9, Huach Mountains, 1929, [H. C. H.].

CALIFORNIA: I o’, Forest Home, 5200 ft. alt., May 18 1934, (A. J. Basinger),
type, [A. N.S. P.]. I o, Falls, Forest Home, San Bernardino County, September
21 1935, (A. J. Basinger), [A. J. Basinger]. 1 9, Mill Creek Canyon, San Ber-
nardino Mountains, June 7 1924, (J. M. Aldrich), paratype, [U. S. N. M.].

OREGON: I a’, Alsea, May 25 1920, (Loring G. Hudson); 1 <, Corvallis, August
22 1924, (H. A. Scullen); 1 9, Kiger’s Island, May 23 1930;1 o&, Newport, August
20 1929, (R. E. Dimick), [Ore. State Col.].

UTAH: 1 o’, Deep Creek Mts., June 1928, (Vasco M. Tanner); 1 <, Provo, no.
date, (D. E. Hardy); 1 &, Orem, June 17, 2 &, Riverton, June 18 1937; 1 2,
Lindon, June 25 1937, (L. L. Hansen), [Utah Agr. Col.].

Wyominc: 1 o&, Yellowstone Park, July 22 1939, (Harvey Roberts), [F. M.
Snyder].

Pegomyia banffi Huckett
Pegomyia banffi Huckett, Trans. Amer. Ent. Soc., LXV, p. 33, 1939.

The species banffi may be distinguished from related forms by
the possession of the following combination of characters: Mid
femur with a bristle on distal half of anteroventral surface, hind
tibia with a bristle on proximal half of posterior surface, fore tibia
with apical posterodorsal bristle setulose. The eyes in male are
closely approximate and the cerci (upper forceps) are peculiarly
clothed with a dense pubescence.

ALBERTA: I o, Banff, June 28 1917. 2 o, Lake Louise, July 26 1917, [H. C. H.].
1 o’, Banff, July 30 1922, (C. B. D. Garrett), type, [C. N. C.].

WASHINGTON: I o', Mount Rainier, Yakima Park, July 26 1932, paratype; 1 &,
Mount Rainier, Whiite River, July 20 1924, (A. L. Melander), [A. L. M.].

MEM. AMER. ENT. SOC., 10

90 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

WyominG: 1 9, Larva Creek, Yellowstone Park, July 5 1923, (A. L. Melander),
allotype, [A. L. M.].

Pegomyia frigida (Zetterstedt) (Figs. 15, 46, 79.)

Anthomyia frigida Zetterstedt, Dipt. Scand., Iv, p. 1685, 1845. Siebke, Enum.
Insect. Norveg., Iv, p. 121, 1877.

Pegomyia bivitiata Stein, Wien. Entom. Zeitg., Xxv, p. 98, 1906. Stein, Arch. f.
Naturgesch., (1913), LXxIx, (A), hft. 8, p. 34, 1914. Stein, Arch. f. Naturgesch.,
(1915), LXxxI, (A), hft. 10, p. 124, 1916. Stein, Arch. f. Naturgesch., (1918),
LXXXIVv, (A), hft. 9 p. 65, 1920. Karl, Tierwelt Deutschlands, x11I, pt. 3, p. 131,
1928.

Pegomyia frigida Stein, Kat. Palaark. Dipt., m1, p. 702, 1907. Ringdahl, Arkiv.
Zool., Xx1, A, no. 20, p. 5, 1930. Ringdahl, Ent. Tidskr.,.Li, hft. 3, p. 174,
1931. Ringdahl, K. Svensk. Veten. Kap. Akad. Skrift. Naturskyddsarenden,
nr. 18, p. 21, 1931. Tiensuu, Acta Soc. Faun. Flor. Fennica, Lvmt, no. 4, p. 28,
1935. Séguy, Gen. Insect., fasc. 205, p. 55, 1937.

Pegomyia lativittata Malloch, Ohio Jour. Science, xx, p. 272, 1920. Malloch,
Bull. Brooklyn Ent. Soc., Xv, p. 125, 1920. Séguy, Gen. Insect., fasc. 205, p. 59,
1937.

Pegomyia (Pegomyza) frigida Ringdahl, Ent. Tidskr., LIx, p. 194, 1938.

The species frigida is related to banffi and caduca, the males of
which have the eyes closely approximate and costal setulae incon-
spicuously developed. In frigida the thorax and abdomen are
blacker and more highly shining, the mesonotum has well marked
streak along lateral declivities, as in ipsia, the hypopygium is
shining black, fore tibia has a robust apical posterodorsal bristle,
and hind tibia has no proximal bristle on posteroir surface. In the
specimens before me the fore tibiae are invariably distinctly darker
than mid or hind tibiae, and they possess two posteroventral
bristles. In female the second, third and fourth fore tarsal seg-
ments are narrowly broadened and bristles on posteroventral
surface of mid and hind femora are weakly developed.

ALASKA: I o’, Savonoski, Lake Naknek, July 1919, (J. S. Hine), [Ohio State
Univ.].

ee 1 2, Moscow Mountain, August 26 1923, (A. L. Melander), [A. L. M.].

New HAMPSHIRE: 2 9, Monadnock, June 11 1932, (A. L. Melander), [A. L. M.].

OnTARIO: 1 @, Macdiarmid, June 27 1922, (N. K. Bigelow), [C. N. C.].

WASHINGTON: I o’, Mount Rainier, White River Camp, September 11 1932; 1
9, Mount Rainier, Sunrise, August 28 1932, 6380 ft. alt., (J. Wilcox); 1 «&, Mount
Rainier, Shadow Lake, August 15 1932, 6500 ft. alt., (C. H. Martin), [H. C. H.].
2 9, Mount Rainier, Skyline Trail, August 10 1925, (A. L. Melander), [A. L. M.].

H. C. HUCKETT gI

Pegomyia caduca Huckett
Pegomyia caduca Huckett, Trans. Amer. Ent. Soc., LXV, p. 35, 1939.

The species caduca closely resembles frigida (Zetterstedt), from
which it may be distinguished by the absence of yellowish color-
ation to wings and calyptrae, lack of lustre or sheen to abdomen
and thorax, absence of lateral markings on mesonotum, and by
the pruinescence on hypopygium of male.

WASHINGTON: I o, Mount Rainier, Yakima Trail, July 22 1924, (A. L. Me-
lander), type, [A. L. M.].

WYoMING: I @, Yellowstone Park, Crescent Hill, July 5 1923, (A. L. Melander),
allotype, [A. L. M.].

Pegomyia anorufa Stein

Pegomyia anorufa Stein, Arch. f. Naturgesch., (1918), LXxxtv, (A), hft. 9, May p.
67, 1920. Séguy, Gen. Insect., fasc. 205, p. 52, 1937.

Pegomyia subgrisea Malloch, Trans. Amer. Ent. Soc., xLvi, p. 180, 1920. Malloch,
Bull. Brooklyn Ent. Soc., Xv, p. 125, 1920. Frison, Bull. Ill. Nat. Hist. Surv.,
XVI, p. 206, 1927.

Pogonomyia subgrisea Séguy, Gen. Insect., fasc. 205, p. 320, 1937.

I have not seen the type of anorufa Stein, but there seems to me
little doubt regarding the probable validity of the above synonymy.
The species, as indicated by the type of subgrisea, bears a relation-
ship to tarsata. It may be readily distinguished from the latter
species by the presence of a bristle on distal half of anteroventral
surface of mid femur, and by the blackish second antennal seg-
ment. In addition the male of subgrisea has the eyes more widely
separated across frons and the costal setulae more conspicuously
developed than in related species.

ALBERTA: 1 9, Waterton, June 19 1932, (H. L. Seamans), [C. N. C.].

MONTANA: I co’, Bozeman, June 14 1906, type of subgrisea Mall., [Ill. N. H. S.].

WYOMING: 1 9, Yellowstone Park, Crescent Hill, July 5 1923, (A. L. Melander),
[A. L. M]].

Pegomyia quadrispinosa Malloch (Figs. 11, 40, 72.)

Pegomyia quadrispinosa Malloch, Trans. Amer. Ent. Soc., XLVI, p. 181, 1920.
Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 125, 1920. Frison, Bull. Ill. Nat. Hist.
Surv., XVI, p. 206, 1927.

Pogonomyia quadrispinosa Séguy, Gen. Insect., fasc. 205, p. 319, 1937.

MEM. AMER, ENT. SOC., 10

92 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

The species quadrispinosa has the habitus of substrzatella, flavi-
cans and apicalis. It may be distinguished readily from flavicans
and substriatella by the blackish second antennal segment, and
from the male of apicalis by the entirely reddish mid and hind
femora. The females of guadrispinosa and apicalis are much alike,
both having mid and hind femora entirely reddish. However in
quadrispinosa the female may usually be distinguished from that
of apicalis by the intensive yellowish color of wing veins proximad,
and by the yellowish calyptrae. All the foregoing species and those
of frigida, anorufa and banffi are characterized by the possession of
a bristle on distal half of anteroventral surface of mid femur and
further by the absence of accessory setulae on notopleural callosity.
In the female of quadrispinosa, substriatella, flavicans and apicalis
the fore tarsal segments are slender, whereas in the female of
anorufa, frigida and banffi the third and fourth fore tarsal segments
are broadened.

ALBERTA: I o’, Waterton, July 22 1923, (H. L. Seamans), [C. N. C.]. 1 3,3 9,
same locality, July 14 1923; 1 9, Wabamun, August 2 1936, (E. H. Strickland),
[Univ. Alberta].

CALIFORNIA: I 9, Fallen Leaf, July 17 1917, 6500 ft. alt., (J. M. Aldrich),
[U.S. N. M.].

COLORADO: I o, Tennessee Pass, July 24 1917, 10240 ft. alt., (J. M. Aldrich),
{[U.S.N.M.]. 1 @, Pingree Park, August 20 1935, 9000 ft. alt., [Univ. Wisc.].

MONTANA: I <, Gallatin County, July 9 1900, 9400 ft. alt., (C. Koch), type,
(Ill. N.H.S.J. 1 9, Monida, June 27 1913, allotype, [IIl. Nat. Hist. Surv.].

OREGON: I 6’, 1 9, Anthomy Lake, Blue Mts., August 3 1929, 7100 ft. alt.,
(H. A. Scullen), [Ore. State Col.].

UTAH: 3 o’, Blue Lake, La Sal Mts., 9500 ft. alt., no date, (Vasco M. Tanner),
{Utah Agr. Col.].

WASHINGTON: 6 o, 2 2, Mount Rainier, Sunrise, August 13 1931, 6318 ft. alt.;
1 @, Mount Rainier, White River Entrance, August 4 1931, (J. Wilcox); 1 9,
Mount Rainier, Shadow Lake, August 24, 6500 ft. alt., (C. H. Martin), [H. C. H.].
6 &, 3 ¢, Mount Rainier, Yakima Park, July 22 1924; 1 @, 1 9, Mount Rainier,
Summerland, July 24 1924; 1 o, Mount Rainier, White River, July 23 1924; 2 0,
Swank Creek, June 28 1924, (A. L. Melander), [A. L. M.].

WYOMING: 1 @, Yellowstone Park, Old Faithful, September 30, 1924, (N.
Criddle), [C. N. C.]. 1 o, Yellowstone Park, 4 miles south of Thumb Station,
July 17 1923; 1 &, 1 9, Yellowstone Park, Beach Springs, July 19 1923; 1 &,
Yellowstone Park, Thumb Station, July 16 1923; 2 o, Yellowstone Park, North-

H. C. HUCKETT 93

west Entrance, July 27 1923; 1 &, Yellowstone Park, Swan Lake, July 10 1923;
I o', Yellowstone Park, Indian Creek, July 8 1923; 1 9, Yellowstone Park, Turbid
Lake, July 20 1923; 1 9, Yellowstone Park, lake, July 18 1923, (A. L. Melander),
[A. L. M.].

Pegomyia setiformis Huckett
Pegomyia setiformis Huckett, Trans. Amer. Ent. Soc., LXV, p. 32, 1939.

The species setzformis is undoubtedly closely allied to the coastal
and southern form fuscicauda. Because of the tendency for some
of the differentiating characters to vary in fuscicauda there may
be difficulties in distinguishing the two species if too much credence
is placed in the key for this purpose. However in setiformis all
the specimens before me possess a robust apical posterodorsal
bristle on hind tibia and a weak mid anteroventral bristle on mid
tibia, whereas in all specimens of fuscicauda that I have seen the
former character is weakly developed and the latter is not present.
The males of setzformis and fuscicauda may be distinguished from
those of such related forms as duplicata and longimana (Pokorny)
by the black subshining hypopygial sclerites which contrast
sharply with the pale tergal pruinescence, and by the addition of
accessory bristles on basal sclerite of hypopygium in addition to
those that encircle the puckered area on the dorsocentral plane.
In duplicata and longimana the hypopygium is grayish pruinescent
and concolorous with abdominal terga and there are no additional
bristles on basal sclerite beside the single semicircular series
bordering the puckered area.

In the female of setiformis and fuscicauda the second, third and
fourth fore tarsal segments are broadened, whereas in duplicata
and longimana these segments are uniformly slender as in mid
tarsus.

ALBERTA: 1 o, 1 9, Waterton, July 12 1923, (H. L. Seamans), type and allotype;
1 92, Banff, July 17 1922, (C. B. D. Garrett); 1 9, Moraine Lake, August 4 1923,
(J. McDunnough), [C. N. C.].

BRITISH COLUMBIA: I 9, Kamloops, May 23 1923, (E. R. Buckell), [C. N. C.].

IDAHO: 1 o’, Potlatch, May 28 1930, [H. C. H.].

WASHINGTON: I 9, Pullman, May 13 1923, (A. L. Melander), [A. L. M.].

WYOMING: 1 <’, Yellowstone Park, Crescent Hill, July 5 1923, (A. L. Melander),
[A.L. M].

MEM. AMER. ENT. SOC., 10

94 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Pegomyia duplicata (Malloch) (Figs. 14, 42, 75.)
Hylemyia duplicata Malloch, Trans. Amer. Ent. Soc., XLiv, p. 308, 1918. Frison,
Bull. Ill. Nat. Hist. Surv., XvI, p. 201, 1927. Séguy, Gen. Insect., fasc. 205,

Pp. 90, 1937.

Pegomyia fuscinervis Stein, Arch. f. Naturgesch., (1918), LXxx1v, (A), hft. 9, p. 69,

1920. Séguy, Gen. Insect., fasc. 205, p. 56, 1937.

The species duplicata is closely allied to longimana (Pokorny) in
that the sclerites of the hypopygium are grayish opaque, con-
colorous with abdomen, and the bristles on the basal sclerite of
hypopygium are in a single series around a puckered teneral area,
whereas in such related forms as fuscicauda and setiformis these
sclerites are blackish and subshining in contrast to the drab gray-
ish color of abdomen, and there are numerous accessory bristles on
the basal sclerite of hypopygium. In the female of duplicata and
longimana the fore tarsal segments are not broader than those of
mid tarsus. I have contrived to find characters that would sepa-
rate duplicata from longimana effectively, but the results have not
been entirely satisfactory owing to the variable nature of the
species. In nearly all specimens of duplicata that I have seen the
fore tibia has a robust apical posterodorsal bristle and there is
usually at least a trace of clouding along cross veins, and in the
male there is invariably present a bristle near base of anteroventral
surface of mid femur, whereas in longimana these characters are
seldom present or but weakly developed. The related forms
cresca and tarsata may be readily distinguished from duplicata and
longimana by the entirely yellow second antennal segment in the
former species.

ALBERTA: I o’, Edmonton, July 27 1936, (E. H. Strickland), [Univ. Alberta].

BriTIsH COLUMBIA: I 9, Keremeos, July 31 1923, (C. B. D. Garrett), [C. N. C.].

CALIFORNIA: I o', Yosemite Valley, May 22 1908, type of duplicata Mall.,
[A. N.S. P.]. 1 &@, 1 @, Berkeley Hills, Alameda County, April 20 1908, para-
types of duplicata Mall., [I]. N. H.S.]. 1 o&, Pasadena, April 2 1929, (F. Grinnell
Jr.); 1 &, 1 9, Mill Creek Canyon, San Bernardino Mts., June 9 1924, (J. M.
Aldrich), [(U.S. N. M.]. 1 #, Downey, November 27 1933;2 9, Forest Home, San
Bernardino County, Falls, November 21 1935, (A. J. Basinger), [A. J. Basinger].
1 o, Amona, San Diego County, August 15 1914; 5 9, Cuyamaca Mountains,
San Diego County, August 16 1914, (J. C. Bradley), [C. U.]. 1 #%,1 9, Berkeley,
March 26 1897; 1 <’, Palo Alto, April 27 1906; 1 &, Stanford University, February

H. C. HUCKETT 95

28 1906, cotypes of fuscinervis Stein, [Z. M. U. B.]. 1 @, Giant Forest, Sequoia
National Forest, August 22 1917, (R. C. Shannon), [H. C. H.]. 1 &, Elmonte,
February 17 1935, (M. W. Stone), [J. Wilcox]. 1 =, Santa Cruz, April 19 1937,
(R. Latta).

OREGON: I co’, Talent, September 30 1916, (C. A. McCormick); 1 ¢?, Vale,
August 15 1902. I 9, Salem, August 1923, (J. Wilcox), [Ore. State Col.]. 1 9,
4 miles south of Canyonville, Douglas County, May 4 1936, (Geo. Ferguson).

SoutH DAKOTA: I o, I 9, Spearfish, July 29 1924, (H. C. Severin), [South
Dakota State Col.].

UTAH: 1 @Q, Provo, no date, (D. E. Johnson). 1 9, North Beaver, May 3 1934,
(G. F. Knowlton), [Utah Agr. Col.].

WASHINGTON: 2 o”, North Dryden, April 23 1925; 1 &, Pullman, April 24 1924,
(A. L. Melander), [A. L. M.].

WYOMING: I co’, Yellowstone Park, Crescent Hill, July 5 1923;1 9, Yellowstone
Park, Beach Springs, July 19 1923; 1 9, Yellowstone Park, Thumb Station, July
16 1923; I 9, Yellowstone Park, Apollinaris, July 8 1923, (A. L. Melander),
[A. L. M.].

Pegomyia longimana (Pokorny) (Figs. 17, 44, 77.)

Chortophila longimana Pokorny, Verh. zool.-bot. Ges. Wien, XXXVII, p. 405, 1887.
Pegomyia longimana Stein, Wien. Ent. Zeitg., xxv, p. 96, 1906. Stein, Arch. f.
Naturgesch., (1913), Lxxrx, (A), hft. 8, p. 35, 1914. Stein, Arch. f. Naturgesch.,
(1915), LXxxI, (A), hft. 10, p. 124, 1916. Ringdahl, Trémso Museums Arshefter,
. (1926), XLIx, nr. 3, p. 34, 1928. Karl, Tierwelt Deutschlands, x1, pt. 3, p.
135, 1928. Ringdahl, K. Svensk. Vet. Kap. Akad. Skrift. Naturskyddsarenden,
nr. 18, p. 21, 1931. Tiensuu, Acta Soc. Faun. Flor. Fennica, Lviil, no. 4, p. 28,
1935. Séguy, Gen. Insect., fasc. 205, p. 50, 1937.
Pegomyia (Pegomyza) longimana Ringdahl, Ent. Tidskr., Lrx, hft. 3-4, p. 195, 1938.
I am of the opinion that the specimens listed below are referable
to this european species, the male from Quebec being typical as
indicated by the slender proportions of abdomen, legs and wings.
In the specimens from the western States these parts are compara-
tively broader and more robust. In addition there is a tendency
for the bristles on anteroventral surface of hind femur to be con-
tinued in series to near base, whereas in Quebec specimen the
bristles on anteroventral surface are largely confined to distal half.
The species longimana is closely related to duplicata, from which
it may invariably be distinguished by the absence of a robust
bristle at apex of posterodorsal surface of fore tibia. Further
differences and affinities between the species are discussed under
duplicata.

MEM. AMER. ENT. SOC., 10

96 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

ALBERTA: 9 <, Waterton, July 17 1923, (H. L. Seamans), [C. N. C.]. 1 o, Ed-
monton, June 2 1936, (E. H. Strickland), [Univ. Alberta].

CALIFORNIA: I o’, Tuolumne Meadows, 8600 ft. alt., August 15 1916, (G. R.
Pilate).

COLORADO: 1 <”, Pingree Park, August 24 1923, (R. C. Smith), [H. C. H.].

IDAHO: I o, Potlatch, May 28 1930, (J. M. Aldrich), [U. S. N. M.].

QUEBEC: I o’, Bonne Esperance, July 14 1929, (W. J. Brown), [C. N. C_].

SouTH DakoTa:1 9, Spearfish, July 26 1924;1 9, Cutler, July 19 1924, [South
Dakota State Col.].

UtaH: 1 o, Spanish Fork, May 21 1938, (G. F. Knowlton), [Utah Agr. Col.].

WASHINGTON: 3 o’, Mount Rainier, White River, July 23 1924; 1 o&, Mount
Rainier, Summerland, July 24 1924; 1 &@, Mount Rainier, Yakima Park, July 22
1924, (A. L. Melander), [A. L. M.].

WYOMING: I o’, Yellowstone Park, Beach Springs, July 19 1923; 1 @, Yellow-
stone Park, Clematis Creek, July 9 1923, (A. L. Melander), [A. L. M.].

Pegomyia solitaria Stein

Pegomyia solitaria Stein, Wien. Ent. Zeitg., xxv, p. 80, 1906. Stein, Arch. f.
Naturgesch., (1913), LxxIx, (A), hft. 8, p. 36, 1914 . Stein, Arch. f. Naturgesch.,
(1915), LXxxt, (A), hft. 10, p. 125, 1916. Karl, Tierwelt Deutschlands, x11,
pt. 3, p. 140, 1928. Ringdahl, Arkiv. Zool., xxi, (A), no. 20, p. 5, 1930. Tiensuu,
Acta Soc. Faun. Flor. Fennica, Lyit, no. 4, p. 28, 1935. Séguy, Gen. Insect.,
fasc. 205, p. 63, 1937.

Pegomyia (Pegomyia) solitaria Ringdahl, Ent. Tidskr., Lrx, hft. 3-4, p. 208, 1938.
The species solitaria may be readily recognized owing to the

unusual bristling of the hind tibiae. The true posterodorsal and
apical mid dorsal bristles are absent and the dorsal surface has a
bristle at middle. In general habitus the species may be linked to
the intersecta-subgroup. The processes in male appear as weakly
chitinized lamellate appendages, which are bare except for a fringe
of setulae along the greater part of inner border and a few bristles
at extreme base on outer border. In the female the caudal margin
of last segment of ovipositor has a series of stiff short bristles.

ALASKA: 4 o, Savonoski, Naknek Lake, July 1919, (J. S. Hine), [Ohio State
Univ.].

ALBERTA: I 9, Banff, August 12 1922, (C. B. D. Garrett), [C. N. C.].

BriTIsH COLUMBIA: I 9, Agassiz, May 1 1924, (R. Glendenning), [C. N. C.].

IDAHO: 1 2, Moscow Mountain, August 26 1923, (A. L. Melander), [A. L. M.].

MONTANA: I 9, Yellowstone National Park, August 25 1915, 8200 ft. alt.,
[Mont. Exp. Sta.]. 1 9, Gallatin County, August 15 1912, 5400 ft. alt.

QUEBEC: I 9, Hemmingford, October 15 1924; 1 9, “KK. Camns,” August 26
1931, (W. A. Reeks), [C. N. C.].

H. €; HUCKETT 97

Pegomyia abnormis Stein
Pegomyia abnormis Stein, Arch. f. Naturgesch., (1918), Lxxxiv, (A), hft. 9, p.

65, 1920. Séguy, Gen. Insect., fasc. 205, p. 51, 1937.

I have only been able to recognize this species from specimens
belonging to the original series, which was collected on Moscow
Mt., Idaho. The male has the vertex of head and parafrontals
bristled like the female, the interfrontalia is uniformly wide
throughout, being nearly equal in width to breadth of third anten-
nal segment. In both male and female the humeral callosities,
scutellum, thoracic pleura and caudal segments of abdomen are
yellowish testaceous, and the apical setulae of scutellum are hair-
like as those on ventral surface. Usually there are one or more
hairs to be found on caudal surface of hind coxae proximad, and
the costa is devoid of setulae on lower surface.

The processes in male resemble those of dissecta, the inner border
being densely clothed with short setulae from base to near apex.
In the female the terminal sclerites of ovipositor are armed with
stiff black setae, the cruciate bristles are robust, and ventral bristle
of caudal pair of sternopleurals is weakly developed.

IpAHo: 1 2, Moscow Mountain, August 23 1908; 1 9, July 22 1911, cotypes;

I o,1 2, nodata, [U.S.N.M.]. 3 &, same locality, July 22 1911, cotypes, [A. L.
M.].

Pegomyia unguiculata Malloch (Figs. 3, 32, 56.)
Pegomyia unguiculata Malloch, Trans. Amer. Ent. Soc., XLVI, p. 176, 1920. Mal-
loch, Bull. Brooklyn Ent. Soc., Xv, p. 122, 1920. Frison, Bull. Ill. Nat. Hist.

Surv., XVI, p. 206, 1927.

Pogonomyia unguiculata Séguy, Gen. Insect., fasc. 205, p. 320, 1937.

The species unguiculata has much in common with intersecta
(Meigen) and tacta Huckett. In the male this is notably apparent
owing to the peculiar structure and appearance of the hypopygium
and copulatory appendages, the former being shiny and the proc-
esses lamellate and horny, largely devoid of bristles. In intersecta
the abdomen and tibiae are black, in unguiculata the abdomen is
blackish and the tibiae yellow, whilst in tacta the abdomen and
tibiae are reddish.

MEM. AMER. ENT. SOC., 10

98 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

ALASKA: 3 o*, Camp 327, ‘‘Alaska Eng. Comm.,’’ July 13 1921, (J. M. Aldrich),
[U. S. N. M.]. :

ALBERTA: I 6’, Lake Louise, July 15 1908, (C. S. Minot), paratype, [A. N. S. P.].
24 o&, Lake Louise, July 27 1917, [Muséum National d’Histoire Naturelle]. 1 9,
Banff, August 7 1922, (C. B. D. Garrett), [C. N. C.].

- British COLUMBIA: I 9, Similkameen, July 24 1906, (Sherman).

Pegomyia pilosa Stein (Figs. 29, 49, 65.)
Pegomyia pilosa Stein, Ent. Nachr., XXvI, p. 322, 1900. Stein, Wien. Ent. Zeitg.,
XXV, p. 82, 1906. Stein, Arch. f. Naturgesch., (1913), Lxx1x, (A), hft. 8, p. 36,
1914. Stein, Arch. f. Naturgesch., (1915), Lxxx1, (A), hft. 10, p. 126, 1916.
Ringdahl, Trémso Museums Arshefter, xL1x, (1926), no. 3, p. 33, 1928. Ring-
dahl, K. Svensk. Vet. Kap. Akad. Skrift. Naturskyddsarenden, nr. 18, p. 21,
1931. Tiensuu, Acta Soc. Faun. Flor. Fennica, LVIIl, no. 4, p. 29, 1935. Séguy,
Gen. Insect., fasc. 205, p. 61, 1937.
Pegomyia flavipes Malloch (not Fallén), Rept. Canad. Arct. Exped., 1913-18, 11,
pt. C, p. 74C, 1919. Séguy, Gen. Insect., fasc. 205, p. 55, 1937.
Pegomyia (Pegomyia) pilosa Ringdahl, Ent. Tidskr., L1x, hft. 3-4, p. 208, 1938.
The specimens of pilosa before me exhibit a marked degree of
variation in color in both sexes. The male specimens from Nova
Scotia have a paler aspect, in which the palpi, second antennal
segments and humeral callosities are entirely yellowish; the male
from Bar Harbor, Maine, is darker and has the second antennal
segment rufous and the palpi fuscous at apex; the males from
Mount Rainier and Alaska have the antennae nearly entirely
black, in the former case the palpi are considerably infuscated.
All male specimens have the characteristic development of the
chaetotaxy on hind femora and hind tibiae, although in specimens
from Bar Harbor and Mount Monadnock this peculiarity is not so
sharply exhibited as in Nova Scotian and Alaskan specimens. In
addition all femora are broadly infuscated on dorsum towards the
apical region and hairs and bristles on ventral region of occiput
are golden tinged, less so in the darker forms and more highly so
in paler specimens. It is not improbable that males of this species
which have the hind femoral bristles and hind tibial setulae more
normally developed may be mistaken for those of the related form
Pegomyia tenera obscurior Collin.?® Such specimens of pilosa may

36 Collin, J. E. The Oxford University Expedition to Greenland, 1928. Diptera
(Orthorrhapha Brachycera and Cyclorrhapha) from Greenland. Ann. Mag. Nat.
Hist., ser. 10, VII pp. 84-85, 1931.

H. C. HUCKETT 99

be recognized more surely by the abnormally long bristles in the
posterior series of fore femur. .

The female specimen from Machias has the mesonotum con-
siderably darkened except on scutellum and humeral callosities,
and the frontal vitta is blackened on caudal half, whereas in the
remaining female specimens the thorax is largely yellowish, being
slightly grayish tinged on dorsum, and the frontal vitta is entirely
reddish. The palpi in the Machias specimen are nearly entirely
reddish, whereas in the remaining specimens they are rather de-
cidedly infuscated apicad. The ovipositor is compressed, strongly
chitinized, and seems fitted for piercing. The marginal bristles of
fifth abdominal sternum are robustly developed.

The female of pilosa is difficult to distinguish from those of
rufipes and tenera, all having the palpi infuscated at apex and the
presutural series of acrostical bristles not widely separated from
one another. In cases where female specimens of pilosa have yellow
palpi, the species approaches the characters defining the female of
flavipalpis. From the female of these three species that of pilosa
may usually be distinguished by having the proximal half of
anteroventral surface of hind femur bare, three bristles on antero-
dorsal surface of hind tibia and no cruciate bristles.

I have reexamined the specimens from Alaska which have been
recorded by Malloch?’ as flavipes, and am of the opinion that they
belong to the species pilosa, resembling in every important respect
the specimens from Nova Scotia. Thus flavipes (Fallén) so far
as I know has yet to be correctly recorded as occurring in North
America.

ALASKA: 1 go’, Bering Sea, July 1913;1 o&, Nome, August 21 1916, (F. Johansen),
[C. N. C.].

MAINE: I a, Salisbury Cove, July 24 1925; 1 o, Seal Harbor, July 29 1930,
(A. L. Melander), [A. L. M.]. 1 9, Machias, July 1922. 1 o&, Bar Harbor, June
15 1921.

NEw HAMPSHIRE: I 9, Mount Monadnock, July 26 1926, (A. L. Melander),
[A. L. M.].

NovA Scotia: I o’, Truro, July 13 1913, (R. Matheson); 2 <, Kentville, July
13 1924, (R. P. Gorham), [C. N. C.].

37 Malloch, J. R. The Diptera collected. by the Canadian Expedition, 1913-18
(excluding the Tipulidae and Culicidae). Rep. Can. Arctic Exped., 1913-18, 111, Ins.,
pt. C., p. 74C, 1919.

MEM. AMER. ENT. SOC., 10

IO0O0 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

ONTARIO: I Q, Sand Lake, July 1 1926, (F. P. Ide), [C. N. C.].

QUEBEC: I 9, Abbotsford, June 9 1936, (G. E. Shewell), [C. N. C.].

WASHINGTON: I co’, Mount Rainier, Summerland Trail, July 24 1924; 2 9,
Mount Rainier, White River, July 23 1924, (A. L. Melander), [A. L. M.].

Pegomyia unicolor Stein (Figs. 27, 51, 67.)

Pegomyia unicolor Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 236, 1898. Aldrich,
Misc. Coll. Smithsn. Inst., XLVI, no. 1444, p. 558, 1907. Smith, Ann. Rept. N. J.
State Museum 1909, p. 792, 1910. Stein, Arch. f. Naturgesch., (1917), LXXXIII,
(A), hft. 1, p. 149, 1919. Stein, Arch. f. Naturgesch., (1918), Lxxxtv, (A), hft.
9, p. 63, 1920. Malloch, Bull. Brooklyn Ent. Soc., xv, p. 122, 1920. Huckett,
Ann. Ent. Soc. Amer., XIV, p. 315, 1921. Huckett, Mem. 77, N. Y. (Cornell)
Agr. Exp. Station, (1923), p. 47, 1924. Johnson, Occ. Pap. Boston Soc. Nat.
Hist., vi, p. 233, 1925. Huckett, Mem. tor, N. Y. (Cornell) Agr. Exp. Station,
(1926), p. 841, 1928. Séguy, Gen. Insect., fasc. 205, p. 65, 1937.

Pogonomyia unicolor Séguy, Gen. Insect., fasc. 205, p. 320, 1937.

The species unicolor may be readily distinguished by its entirely
yellowish antennae (frequently in female specimens the third an-
tennal segment may appear tinged with fuscous), the yellowish
setulae on humeral callosities, sternopleura, coxae and ventral
region of occiput, the widely protruded lower calyptral scale and
widely separated series of acrostical bristles. The species genicu-
lata is of similar habitus, but the setulae are black and the calyptral
scales are subequal.

ILLINOIS: 2 o', I 9, no data. [Ill. N. H. S.J.

MICHIGAN: I o', East Lansing, May 24 1937, (C. W. Sabrosky), [Mich. State
Col.].

New York: 1 co, McLean, June 20 1904. 1 o', 1 9, Trenton Falls, June 5-8
1921, (Leonard & Forbes). I o, Ithaca, July. 1 9, Little Neck, Long Island,
July 2 1921, [H. C. H.]. 1 o&, Oswego, June 11 1897, [U. S. N. M.].

OHIO: 2 o’, 2 9, Ira, no date, (J. S. Hine), [Ohio State Univ.].

OKLAHOMA: I oc’, I 2, Broken Bow, June 17 1934, (J. Stankavitch), [Okla. Agr.
& Mech. Col.].

ONTARIO: 1 9, Miners Bay, May 26 1931, (G. S. Walley), [C. N. C.].

PENNSYLVANIA: I o’, Natrona, August 1 1895; 1 @, same locality, July 13 1895,
cotypes, [Field Museum]. 1 <, Castle Rock, June 9 1907, [U. S. N. M.].

Wisconsin: 1 9, Madison, May 21 1930, (R. Bushnell), [Univ. Wisc.].

Pegomyia rufina (Fallén)

Musca rufina Fallén, Muscides, p. 92, 1825.
Anthomyza nigriceps Zetterstedt, Dipt. Scand., XIv, p. 6300, 1860.

H. C. HUCKETT IOI

Pegomyia nigriceps Stein, Wien. Ent. Zeitg., xxi, hft. 2-3, p. 51, 1902.

Pegomyia squamifera Stein, Wien. Ent. Zeitg., xxv, p. 63, 1906. Stein, Arch. f.
Naturgesch., (1913), LXXIx, (A), hft. 8, p. 35, 1914. Stein, Arch. f. Naturgesch.,
(1915), LXXxI, (A), hft. 10, p. 125, 1916. Stein, Arch. f. Naturgesch., (1918)
LXXXIVv, (A), hft. 9, p. 72, 1920. Karl, Tierwelt Deutschlands, x11, pt. 3, p. 137,
1928. Séguy, Gen. Insect., fasc. 205, p. 64, 1937.

Pegomyia rufina Stein, Wien. Ent. Zeitg., XXv, p. 64, 1906. Stein, Arch. f. Natur-
gesch., (1913), LXxIx, (A), hft. 8, p. 35, 1914. Stein, Arch. f. Naturgesch., (1915),
LXXxI, (A), hft. 10, p. 125, 1916. Karl, Tierwelt Deutschlands, x11, (3), p. 138,
1928. Tiensuu, Acta Soc. Faun. Flor. Fennica, LVIm, no. 4, p. 28, 1935. Séguy,
Gen. Insect., fasc. 205, p. 64, 1937.

Pegomyia (Pegomyia) rufina Séguy, Faune de France, VI, p. 163, 1923. Ringdahl,
Ent. Tidskr., L1x, hft. 3-4, p. 202, 1938.

Pegomyia (Pegomyia) squamifera Séguy, Faune de France, VI, p. 165, 1923.

My knowledge of the species is based largely on a male specimen
collected in Sweden by Mr. Ringdahl, to which he had given the
name squamifera Stein. Recently Ringdahl has considered squa-
mifera a synonym of rufina (Fallén). Under the name squamzfera
Stein (1920) has recorded the species as occurring in Colorado from
material in the Vienna Museum. The species superficially re-
sembles winthemt, from which it differs by having the scutellum
and antennae entirely black and palpi fuscous.

Pegomyia mallochi Huckett

Pegomyia mallochi Huckett, Trans. Amer. Ent. Soc., LXV, p. 15, 1939.

Pegomyia winthemi Malloch (not Meigen), Trans. Amer. Ent. Soc., XLVI, p. 178,
1920. Malloch, Bull. Brooklyn Ent. Soc., xv, p. 122, 1920. Huckett, Mem. 77,
N. Y. (Cornell) Agr. Exp. Station, (1923), p. 48, 1924. Johnson, Occ. Pap.
Boston Soc. Nat. Hist., vi, p. 233, 1925. Johnson, Insect Fauna, Biol. Surv.
Mt. Desert Region, p. 210, 1927. Huckett, Mem. 1o1, N. Y. (Cornell) Agr.
Exp. Station, (1926), p. 841, 1928.

The species mallochi as indicated by the above synonymy has
been confused recently with the european species winthemt
(Meigen). The species mallocht may be distinguished from
winthemt by having the palpi fuscous, thorax bare where normally
the lower posthumeral bristle is situated, and scutellum largely
devoid of setulae on disc. The females of mallocht and winthemi
have the distal segments of mid and hind tarsi discoid in appear-
ance, but mallochi in addition to the above distinguishing characters
has no cruciate bristles.

MEM. AMER. ENT. SOC., IO

102 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

District OF COLUMBIA: I 9, Rock Creek Park, August 12 1923, [U. S. N. M.].

MASSACHUSETTS: I o’, Petersham, July 1926, (A. L. Melander), [A. L. M.].

New HAMPSHIRE: I o’, Franconia: July 18 1915, (C. H. T. Townsend), [U. S. N.
M.,].

NEw JERSEY: 2 o’, Lakehurst, June 26 1931, (A. L. Melander), [A.L. M.]. 1 9,
Trenton, July 25, [A. N.S. P.].

New York: 1 a, Ithaca, July 16 1903; 1 9, 6-mile Creek, Ithaca, August 4
1921. 1 9, Ringwood, near Ithaca, June 26 1920; 1 9, Taughanic Falls, August
141928. 1 o, Dix Hills, Long Island, June 15 1935, (F.S. Blanton); 1 9, Harmon,
July 5 1926; 1 9, Yaphank, Long Island, June 6 1928; 1 &, Selden, Long Island,
May 30 1930; 1 9, Southampton, Long Island, July 15 1923; 1 9, Long Pond,
Wading River, Long Island, June 30 1924; 1 <, Orient, Long Island, June 20 1936,
[H. C. H.]. 1 o, Riverhead, Long Island, July 11 1926; 1 9, same locality,
August 10 1927, type and allotype, [A. N. S. P.].

OKLAHOMA: 2 o, Broken Bow, June 19 1934, (J. Stankavitch), [Okla. A. & M.
Col.].

PENNSYLVANIA: I oo’, Ohio Pyle, August 8 1905, [Carnegie Museum]. 1 c’,
Roxborough, Philadelphia, June 20, [A. N. S. P.].

TEXAS: 3 2, College Station, July, [Texas A. & M. Col.].

VIRGINIA: I 9, Chain Bridge, June 23 1923, [U. S. N. M.].

WEST VIRGINIA: 3 9, Cheat Mountains, (H. H. Smith), [Carnegie Museum].

Pegomyia winthemi (Meigen)

Anthomyia winthemi Meigen, Syst. Beschr., v, p. 186, 1826.

Anthomyza wintheni Zetterstedt, Dipt. Scand., v, p. 1792, 1846.

Anthomyia latitarsis Schiner, Fauna Austr., 1, p. 635, 1862. Neuhaus, Diptera
Marchica, p. 226, 1886. Stein, Ent. Nachr., X1v, p. 375, 1888. Slosson, Ent.
News, vill, p. 237, 1897. Aldrich, Misc. Coll. Smithsn. Inst., XLv1, no. 1444, p.
558, 1905.

Anthomyia (Pegomyia) latitarsis Strobl, Verh. zool.-bot. Ges. Wien, XLII, p. 251,
1893.

Pegomyia winthemt Stein, Wien. Ent. Zeitg., XXv, p. 61, 1906. Schnabl, Hor. Soc.
Ent. Ross., XXXIX, p. 8, 1910. Schnabl, Deutsch. Entom. Zeitschr., hft. 6, p. 81,
1git. Stein, Arch. f. Naturgesch., (1913), LXxrx, (A), hft. 8, p. 33, 1914. Stein,
Arch, f. Naturgesch., (1915), LXxx1, (A), hft. 10 p. 127, 1916. Stein, Arch. f.
Naturgesch., (1918), LXxxiv, (A), hft. 9, p. 72, 1920. Britton, Bull. 31, Conn.
Geol. Nat. Hist. Surv., p. 199, 1920. Ringdahl, Trémso Museums Arshefter,
(1926), XLIX, nr. 3, p. 33, 1928. Karl, Tierwelt Deutschlands, x11, pt. 3, p. 123,
1928. Tiensuu, Acta Soc. Faun. Flor. Fennica, LVIII, no. 4, p. 30, 1935. Séguy,
Gen. Insect., fasc. 205, p. 66, 1937.

Pegomyia (Pegomyia) winthemt Schnabl and Dziedzicki, Abh. K. Leop.-Carol.
Deutsch. Akad. Naturforsch., XCv, nr. 2, p. 112, 1911. Séguy, Faune de France,
VI, p. 166, 1923. Ringdahl, Ent. Tidskr., Lrx, hft. 3-4, p. 202, 1938.

Pegomyia fuscofasciata Malloch, Trans. Amer. Ent. Soc., XLVI, p. 178, 1920.
Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 123, 1920. Huckett, Mem. 77, N. Y.

H. C. HUCKETT 103

(Cornell) Agr. Exp. Station, (1923), p. 44, 1924. Johnson, Occ. Pap. Boston
Soc. Nat. Hist., vil, p. 232, 1925. Hallock and Parker, Circ. 103, N. J. Dept.
Agr., p. 17, 1926. Johnson, Insect Fauna, Biol. Surv. Mt. Desert Region, p.
209, 1927. Frison, Bull. Ill. Nat. Hist. Surv., Xvi, p. 206, 1927. Huckett, Mem.
101, N. Y. (Cornell) Agr. Exp. Station, (1926), p. 840, 1928. Johnson, Psyche,
XXXVI, p. 143, 1929.

Pogonomyia fuscofasciata Séguy, Gen. Insect., fasc. 205, p. 319, 1937.

The species winthemz has yellow palpi, numerous setulae on disc
of scutellum, duplicated posthumeral bristle, and in the female
cruciate bristles are well developed and distal segments of mid and
hind tarsi discoid in appearance. The species has recently been
recorded in North American literature as fuscofasciata Malloch,
with which it is identical.

ALASKA: 3 o’, Hurricane, July 15 1921, (J. M. Aldrich), [U. S. N. M.].

BritIsH COLUMBIA: I o, Victoria, May 3 1919, (W. B. Anderson), [C. N. C.].

MAINE: I 9, Seal Harbor, July 29 1930, (A. L. Melander), [A. L. M.].

MANITOBA: I <, Victoria Beach, July 8-9 1928, (N. Criddle), [C. N. C.].

MASSACHUSETTS: I co’, Petersham, July 1926, (A. L. Melander), [A. L. M.].

New HAMPSHIRE: 1 9, Franconia, July 20 1915, (C. H. T. Townsend), [U. S. N.
M.]. 1 9, Alpine Garden, Mount Washington, July 11 1931, (A. L. Melander),
[A. L. M.].

NEw JERSEY: 1 o’, Lakehurst, May 29 1927, (A. L. Melander), [A. L. M.].

New York: 1 9, Wilmington Notch, Adirondacks, July 2 1922, (J. M. Aldrich);
1 &, Whiteface Mountain, Adirondacks, July 4 1922, 3300 ft. alt., (U.S. N. M.].
I 2, Pearl Point, Lake George, August 21 1920;1 9, Juanita Island, Lake George,
August 29 1920, (M. D. Leonard); 1 o&, Taughanic Falls, near Ithaca, August 14
1928; I 9, Ringwood, near Ithaca, June 26 1920; 2 o, Bear Mountain, April 23
1936, (F. S. Blanton); 1 9, Babylon, Long Island, July 7 1933; 1 <, Islip, Long
Island, July 4 1933; 1 9, Yaphank, Long Island, August 8 1926; 3 o, Southold,
Long Island, June 13 1926; 1 &, Selden, Long Island, May 30 1930; 7 o, River-
head, Long Island, June 26 1927, (H. C. Huckett), [H. C. H.].

ONTARIO: 1 9, Mer Bleue, June 22 1916; 1 9, Fewagami Forest Reserve, no date,
[H. C. H.].

QUEBEC: I o’, Abbotsford, August 30 1936, (G. E. Shewell); 1 o, Covey Hill,
June 15 1927, (W. J. Brown), [C. N. C.].

VERMONT: I o*, Mount Equinox, July 15 1935, (F. S. Blanton), [H. C. H.].

WASHINGTON: I 2, Mount Rainier, August 14 1931; 1 9, Stabler, July 3 1926,
(K. Gray), [H. C. H.].

WISCONSIN: I 2, Dane County, August 6 1936, (F. M. Snyder), [Univ. Wisc.].

Pegomyia vittigera (Zetterstedt)

Anthomyza vittigera Zetterstedt, Ins. Lapponica, p. 697, 1838. Siebke, Enum.
Insect. Norveg., Iv, p. 128, 1877.

MEM. AMER. ENT. SOC., 10

104 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Anthomyia vittigera Schiner, Faun. Austr., 1, p. 641, 1862.

Pegomyia vittigera Stein, Wien. Ent. Zeitg., xxv, p. 68, 1906. Stein, Arch. f.
Naturgesch., (1913), LXxXIx, (A), hft. 8, p. 34, 1914. Stein, Arch. f. Naturgesch.
(1915), Lxxx1, (A), hft. 10, p. 127, 1916. Britton, Bull. 31, Conn. Geol. Nat.
Hist. Surv., p. 199, 1920. Malloch, Bull. Brooklyn Ent. Soc., xv, p. 123, 1920.
Johnson, Occ. Pap. Boston Soc. Nat. Hist., vit, p. 233, 1925. Johnson, Insect
Fauna, Biol. Surv. Mt. Desert Region, p. 210, 1927. Ringdahl, Trémso Muse-
ums Arshefter, (1926), XLIX, no. 3, p. 33, 1928. Huckett, Mem. tor, N. Y.
(Cornell) Agr. Exp. Station, (1926), p. 841, 1928. Karl, Tierwelt Deutschlands,
XIII, pt. 3, p. 128, 1928. Ringdahl, Arkiv. Zool., xx1, (A), no. 20, p. 5, 1930.
Curran, Bull. Amer. Mus. Nat. Hist., Lx1, p. 85, 1930. Ringdahl, K. Svensk.
Veten. Kap. Akad. Skrift. Naturskyddsarenden, nr. 18, p. 21, 1931. Tiensuu,
Acta Soc. Faun. Flor. Fennica, Lvl, no. 4, p. 29, 1935. Séguy, Gen. Insect.,
fasc. 205, p. 66, 1937.

Pegomyia (Pegomyia) vittigera Séguy, Faune de France, VI, p. 166, 1923, Ringdahl,
Ent. Tidskr., Lx, hft. 3-4, p. 204, 1938.

The species viitigera resembles gilva Zetterstedt in that the
thorax is largely yellowish and the series of presutural acrostical
bristles are slightly closer to one another than to their respective
series of dorsocentral bristles. In vittigera the mesonotum and to
a lesser extent abdominal terga are slightly more shiny than in
gilva, approaching in character the glossy nature of proboscis, and
the ocellar triangle is shining. In the male of vttigera the mid
anterodorsal bristle of mid tibia is more robust and prealar bristle
slightly longer than in gzlva. In the female of vittzgera the fore
femur has no comparatively stronger bristle developed apicad
among the posterior median series, as is invariably present in
gulva.

ALBERTA: 1 9, Nordegg, July 5 1921, (J. McDunnough), [C. N. C.J]. 1 9,
Edmonton, August 18 1936, (E. H. Strickland), [Univ. Alberta].

BRITISH COLUMBIA: 2 9, Carbonate to Columbia River, July 7-12 1908, 2600
ft. alt., (J. C. Bradley), [C. U.]. 1 9, Saint Mary’s, July 12 1926, (A. A. Dennys),
[C. N. Cl].

NEw HAMPSHIRE: I 9, Benton, July 6 1931; 1 9, Dolly Copp, White Moun-
tains, July 13 1931, (A. L. Melander), [A. L. M.].

New York: 1 9, Avalanche Trail, Adirondacks, July 30 1929, (A. L. Melander),
[A. L. M.].

Nova Scotia: 1 @, Truro, July 13 1913, (R. Matheson), [H. C. H.].

ONTARIO: I Q, Orillia, June 26 1926, (C. H. Curran), [C. N. C.].

QUEBEC: I 9, Ile de Montreal, July 14 1906, (Beaulieu), [C. N. C.]. 1 9,
Montreal, August 8 1930, (A. L. Melander), [A. L. M.].

H. C. HUCKETT 105

Pegomyia gilva (Zetterstedt)

Anthomyza gilva Zetterstedt, Dipt. Scand., v, p. 1789, 1846. Siebke, Enum.
Insect. Norveg., Iv, p. 128, 1877.

Pegomyia gilva Stein, Wien. Ent. Zeitg., XXv, p. 69, 1906. Stein, Arch. f. Natur-
gesch., (1913), LXXIx, (A), hft. 8, p. 34, 1914. Stein, Arch. f. Naturgesch., (1915),
LXXxXI, (A), hft. 10, p. 127, 1916. Stein, Arch. f. Naturgesch., (1918), LXXXIVv,
(A), hft. 9, p. 72, 1920. Ringdahl, Tr¢émso Museums Arshefter, (1926), XLIX,
no. 3, p. 34, 1928. Karl, Tierwelt Deutschlands, x11, pt. 3, p. 129, 1928. Ring-
dahl, K. Svensk. Veten. Kap. Akad. Skrift, Naturskyddsarenden, nr. 18, p. 21,
1931. Tiensuu, Acta Soc. Faun. Flor. Fennica, Lvmil, no. 4, p. 29, 1935. Séguy,
Gen. Insect., fasc. 205, p. 56, 1937.

Pegomyia pallida Stein, Wien. Ent. Zeitg., XXv, p. 69, 1906. Stein, Arch. f. Natur-
gesch., (1913), Lxxrx, (A), hft. 8, p. 34, 1914. Stein, Arch. f. Naturgesch.,
(1y15), LXxxI, (A), hft. 10, p. 127, 1916. Karl, Tierwelt Deutschlands, x11,
pt. 3, p. 128, 1928. Tiensuu, Acta Soc. Faun. Flor. Fennica, Lvl, no. 4, p. 29,
1935. Séguy, Gen. Insect., fasc. 205, p. 61, 1937.

Pegomyia luteola Malloch, Trans. Amer. Ent. Soc., XLVI, p. 175, 1920. Malloch,
Bull. Brooklyn Ent. Soc., Xv, p. 122, 1920. Huckett, Mem. 77, N. Y. (Cornell)
Agr. Exp. Station, (1923), p. 46, 1924. Johnson, Occ. Pap. Boston Soc. Nat.
Hist., vil, p. 232, 1925. Johnson, Insect Fauna, Biol. Surv. Mt. Desert Region,
p. 210, 1927. Huckett, Mem. tor, N. Y. (Cornell) Agr. Exp. Station, (1926), p.
840; 1928. Curran, Bull. Amer. Mus. Nat. Hist., LxI, p. 85, 1930.

Pogonomyia luteola Séguy, Gen. Insect., fasc. 205, p. 319, 1937.

Pegomyia (Pegomyia) gilua Ringdahl, Ent. Tidskr., tix, hft. 3-4, p. 204, 1938.

I have tentatively come to the conclusion that gilva (Zetter-
stedt), pallida Stein and Juteola Malloch represent the same
species. Nearly all of the North American specimens that I have
seen are typical of pallida, with the important exception that there
is no consistency in the coloring of the occipital setulae. These
setae may be yellowish or blackish, or some yellowish and some
blackish. According to Stein (1906) (1914) (1916) and Karl (1928)
gilua may be partly distinguished from pallida by the possession of
a longer prealar bristle. The few european specimens that I have
seen possessing such a character and named gilva were, in my
opinion, representative of vittigera.

There is in the North American specimens of gilva a considerable
variation in the extent of infuscation on thorax, abdomen and
femora. The abdomen in both sexes may or may not have a
blackish incisure across caudal margins of terga, and femora may
or may not have a fuscous apical spot. In the female of pallida

MEM. AMER. ENT. SOC., 10

106 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

the fore femur has a comparatively stronger bristle developed
apicad among the posterior median series of bristles, and the
ocellar triangle is pruinescent, not shining as in vitizgera.

In the study of this species I have received the generous aid and
advice of Mr. Ringdahl and Mr. Tiensuu. Mr. Ringdahl in ex-
amining a representative series of North American specimens
regarded them as belonging to pallida Stein, gilva (Zetterstedt)
not being definitely known to him. Mr. Tiensuu has kindly pro-
vided me with Finnish specimens for comparative study.

ALBERTA: I 9, Wabamun, July 1 1927, (E. H. Strickland), [Univ. Alberta].

BRITISH COLUMBIA: 1 9, Osogoos Valley, August 12 1920, (E. Hearle), [C. N. C.].

COLORADO: 1 @, Pingree Park, August 14 1934, (C. W. Sabrosky), [Mich.
State Col.].

MAINE: I <, Eastport, July 14 1909, (C. W. Johnson), type of luteola Mall.
[N. E. M.N.H.]. 1 9, Bar Harbor, July 21 1919; 1 9, Machias, July 1921, (C. W.
Johnson).

MANITOBA: I 9, Aweme, July 22 1922, (R. M. White), [C. N. C.].

MASSACHUSETTS: I o’, Petersham, July 26 1926, (A. L. Melander), [A. L. M.].

NEw HAMPSHIRE: I Go’, Franconia, July 9 1915, (C. H. T. Townsend), [U. S. N.
M.]. 2 &, Benton, July 6 1931, (A. L. Melander), [A. L. M.].

NEw JERSEY: 1 @, Trenton, June 13, [A. N.S. P.].

NEw YorK: 2 3, I 2, Whiteface Mountain, Adirondacks, July 4 1922; 2 &,
1 2, Wilmington Notch, Adirondacks, July 2 1922, (J. M. Aldrich), [U. S. N. M.].
1 3, Adirondacks, Avalanche Trail, July 30 1929, (A. L. Melander), [A. L. M.].
1 9, Pearl Point, Lake George, August 31 1920; 2 92, Wild Flower Preserve,
Slaterville, August 16 1928; 1 9, Ithaca, June (R. C. Shannon); 3 <7, 1 9, River-
head, Long Island, August 10 1927, [H. C. H.].

Nova Scotta: 1 9, Kentville, July 9 1924, (R. P. Gorham), [C. N. C_].

OnTARIO: I 9, Sand Lake, June 28 1926, (F. P. Ide), [Univ. Alberta].

PENNSYLVANIA: I o’, Pocono Lake, July 10;1 @, Glenside, June 15, [A. N.S. P.].

Pegomyia incisiva Stein (Figs. 28, 50, 64.)

Pegomyia incisiva Stein, Wien. Ent. Zeitg., XXv, p. 73, 1906. Stein, Arch. f.
Naturgesch., (1915) Lxxx1, (A), hft. 10, p. 127, 1916. Karl, Tierwelt Deutsch-
lands, XII, p. 126, 1928. Ringdahl, K. Svensk. Veten. Kap. Akad. Skrift.
Naturskyddsarenden, nr. 18, p. 30, 1931. Tiensuu, Acta Soc. Faun. Flor.
Fennica, LVIII, no. 4, p. 29, 1935. Séguy, Gen. Insect., fasc. 205, p. 59, 1937.

Pegomyia (Pegomyia) incisiva Séguy, Faune de France, VI, p. 162, 1923. Ring-
dahl, Ent. Tidskr., L1x, hft. 3-4, p. 204, 1938.

The species zncisiva has the habitus of the european form flavipes
(Fallén), from which it differs in the male by the shorter bristles on
anteroventral surface of hind femur and by the possession of a

H. C. HUCKETT 107

series of fine erect hairs on proximal half of posteroventral surface.
In addition the third antennal segment is yellowish proximad and
scutellum yellowish apicad, the bristles on lower region of occiput
are blackish.

I have regarded the large series of female specimens listed below
as belonging to this species. In them the frontal vitta, second
antennal segment, cephalic half of parafrontals, parafacials and
cheeks, are entirely reddish, cruciate bristles present, humeral
callosities yellowish, scutellum at least inconspicuously tinged
with yellow apicad, presutural series of acrostical bristles slightly
nearer one another than to their respective series of dorsocentral
bristles, ventral bristle of caudal pair of sternopleurals short, ab-
domen reddish or brownish tinged, hind tibia with three or four
short stout anterodorsal bristles.

ALASKA: I @, Anchorage, July 19 1921, (J. M. Aldrich), [U. S. N. M.].

ALBERTA: 2 9, Edmonton, July 22 1931, (E. H. Strickland); 1 ¢@, Lethbridge,
June 7 1924, (H. E. Gray), [Univ. Alberta]. 1 o, Banff, July 21 1908, (N. B.
Sanson); 5 @, same locality, June 23 1922; 4 @, July 6 1922; 2 Q, July 10 1922,
(C. B. D. Garrett), [C. N. C.].

COLORADO: I 9, Florissant, July 8 1907.

SASKATCHEWAN: I @, Saskatoon, June 9 1923, (N. J. Atkinson), [C. N. C.].

VERMONT: I 2, Manchester, June 5 1910, [U. S. N. M.].

Pegomyia tenera (Zetterstedt)

Anthomyza tenera Zetterstedt, Ins. Lapponica, p. 697, 1838. Siebke, Enum.
Insect. Norveg., IV, p. 126, 1877.

Anthomyia conformis Lundbeck, Vidensk. Medd. naturh. Foren. Kbh., p. 287, 1900.

Pegomyia tenera Stein, Wien. Ent. Zeitg., xxv, p. 82, 1906. Stein, Arch. f. Natur-
gesch., (1913), LxxIx, (A), hft. 8, p. 36, 1914. Stein, Arch. f. Naturgesch.,
(1915), LXxxt, (A), hft. 10, p. 127, 1916. Karl, Tierwelt Deutschlands, x1,
pt. 3, p. 125, 1928. Ringdahl, K. Svensk. Veten. Kap. Akad. Skrift. Naturskydd-
sdrenden, nr. 18, p. 21, 1931. Tiensuu, Acta Soc. Faun. Flor, Fennica, Lv,
no. 4, p. 31, 1935. Séguy, Gen. Insect., fasc. 205, p. 64, 1937.

Pegomyia (Pegomyia) tenera Séguy, Faune de France, VI, p. 165, 1923. Ringdahl,
Ent. Tidskr., L1x, hft. 3-4, p. 205, 1938.

Pegomyia tenera obscurior Collin, Ann. Mag. Nat. Hist., ser. 10, Vil, p. 84, 1931.
Séguy, Gen. Insect., fasc. 205, p. 64, 1937.

The species tenera has the typical male hypopygial structure of
the flavipes-subgroup. There is a considerable degree of variation
in extent of infuscation on thorax, abdomen and femora, as is the

MEM. AMER. ENT. SOC., IO

108 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

tendency in most species belonging to this group. The palpi may
be almost entirely yellowish or infuscated apicad; usually the
scutellum is yellowish tinged at apex. The species resembles most
closely rufipes and incisiva; in the male it may be distinguished
from rufipes by the absence of a series of stout setulae on postero-
ventral surface of hind femur, and from incisiva by the weaker
series of bristles on proximal half of anteroventral surface of hind
femur, and by the entirely black third antennal segment and
partly infuscated femora. The female of tenera differs from those
of rufipes and incisiva by having the basal tergum of ovipositor
yellowish and armed with a series of robust marginal bristles, as in
flavipalpis.

Collin (1931) has concluded that tenera was probably the
species that Lundbeck recorded from Greenland as conformis
(Fallén) and later as hyoscyami (Panzer).

ALBERTA: I o’, Nordegg, July 5 1921, (J. McDunnough), [C. N. C.].

QUEBEC: 1 <, East Coast, James Bay, August 1920, (F. Johansen), [C. N. C.].

WYOMING: 1 2, Yellowstone National Park, Spring Creek, July 15 1923, (A. L.
Melander), [A. L. M.].

Pegomyia rectifrons Huckett
Pegomyia rectifrons Huckett, Trans. Amer. Ent. Soc., LXV, p. 19, 1939.
Pegomyia abnormis var. Stein, Arch. f. Naturgesch, (1918), Lxxxiv, (A), hft. 9,

p. 67, 1920.

Stein (1920) regarded this species as a variant of the described
form abnormis, in which the eyes of male are abnormally widely
separated for a species belonging to this genus. In the male of
rectifrons the eyes are not unusually widely separated, appearing
more normal in this respect than abnormis. Under the circum-
stances it seems to me possible that the male of abnormis may
represent the true variant, a point that cannot be satisfactorily
verified with the limited material at present available for study.

The form rectifrons, which I know only in the male sex, may be
distinguished from Stein’s abnormis by the structure and bristling
of the head and by the uniform, grayish black color of the abdomen.
Another allied species is anabnormis, which resembles rectifrons
but differs in that the humeral callosities and scutellum in male
are blackish, concolorous with mesonotum, third antennal seg-

H. C. HUCKETT 109

ment entirely blackish, and hind coxae have no hairs on caudal
surface.

IDAHO: 1 ~&, Mountains, Moscow, July 10, (R. C. Shannon), type, [A. N. S. P.].

Pegomyia tacta Huckett
Pegomyia tacta Huckett, Trans. Amer. Ent. Soc., LXV, p. 16, 1939.

I have placed tacta tentatively in the intersecta-subgroup, in
which I believe it finds its closest affinities. The male of tacta
may be readily recognized by the peculiar horny appearance of
copulatory appendages and by the soft fine bristling on basal
sclerite of hypopygium. The prosternum in all specimens that I
have seen has a pair of bristles, a character which may occasionally
appear in the subfamily as an aberration. The palpi in the male
may or may not be tinged with fuscous distad, and in the female
sex 1t is weakly bristled and narrowly spatulate in outline.

ALBERTA: I oc’, Edmonton, July 9 1929, (E. H. Strickland), type, [C. N. C.].

I o’, same locality, June 13 1936, (E. H. Strickland), paratype, [A. N.S. P.].
MANITOBA: I 9, Birtle, August 20 1928, (R. D. Bird), Allotype, [C. N. C.].

Pegomyia flavipalpis (Zetterstedt) (Figs. 25, 52, 68.)

Anthomyza flavipalpis Zetterstedt, Dipt. Scand., Iv, p. 1707, 1845. Siebke, Enum.
Insect. Norveg., Iv, p. 122, 1877. ‘

Pegomyia flavipalpis Stein, Wien. Ent. Zeitg., xxv, p. 72, 1906. Stein, Arch. f.
Naturgesch., (1913), Lxx1x, (A), hft. 8, p. 33, 1914. Stein, Arch. f. Naturgesch.,
(1915), LXXxI, (A), hft. 10, p. 127, 1916. Ringdahl, Trémso Museums Arshefter,
(1926), XLIX, nr. 3, p. 33, 1928. Karl, Tierwelt Deutschlands, xin, (3), p. 126,
1928. Ringdahl, K. Svensk. Vetenskapsakad. Skrift. Naturskyddsarenden, nr.
18, p. 30, 1931. Tiensuu, Acta Soc. Faun. Flor. Fennica, LVI, no. 4, p. 30,
1935. Séguy, Gen. Insect., fasc. 205, p. 54, 1937.

Pegomyia (Pegomyia) flavipalpis Ringdahl, Ent. Tidskr., yrx, hft. 3-4, p. 209,
1938.

The male specimens in the following record agree in every re-
spect with european specimens of flavzpalpis, but I am not so sure
that the females are conspecific. The latter have the humeral
callosities and scutellum partly yellowish as in specimens taken in
Swedish Lappland in conjunction with a large series of males of
flavipalpis, but these characters contradict those cited by Stein
(1906) in his diagnosis of the species. In addition it may be men-
tioned that the female fore femur of the above specimens has a

MEM. AMER. ENT. SOC., IO

II1O NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

comparatively stronger bristle developed apicad among the pos-
terior median series of bristles, hind tibia has two anterodorsal
bristles and the wing membrane is nearly clear. The caudal
sclerites of the ovipositor are strongly chitinized and appressed as
if for piercing, the basal tergal sclerite of ovipositor (segments
6 + 7) has a series of well developed marginal bristles.

ALBERTA: I o”, Banff, June 17 1922, (C. B. D. Garrett), [C. N. C.]. 1 #,1 @,
Lake Louise, July 27 1917, [Muséum National d’Histoire Naturelle].

COLORADO: I o’, Tennessee Pass, July 7, 10240 ft. alt., (J. M. Aldrich), [U. S. N.
M.].

Nova Scotia: 1 9, Kentville, July 13 1924, (R. P. Gorham), [C. N. C.].

ONTARIO: 1 @, Ghost River, Lake Abitibi, July 4 1925, (N. K. Bigelow). [C.
N. C.].

QUEBEC: 1 9, Laniel, July 7 1931, (H. S. Fleming), [C. N. C.].

Pegomyia pollinosa Ringdahl
Pegomyia (Pegomyia) pollinosa Ringdahl, Ent. Tidskr., Lx, hft. 3-4, p. 209, 1938.
Pegomyia pollinosa Huckett, Trans. Amer. Ent. Soc., LXv, p. 12, 1939.

The following specimens of pollinosa were submitted, among
others belonging to Pegomyia, to Mr. Ringdahl for comparative
study. Ringdahl recognized the specimens as being identical with
some that he had recently captured near Halsingborg, Sweden, and
to which he later gave the name pollinosa. The North American
specimens of pollinosa that I have seen differ slightly from the
male description of european forms in having the antennae,
humeral callosities, thoracic pleura and scutellum yellowish tinged,
and abdominal terga lacking the dark transverse incisures. The
species pollinosa structurally resembles flavipalpis, from which it
differs in the male by having the abdomen largely reddish yellow
and marked with a deeper reddish linear dorsocentral stripe, all
femora and tibiae entirely yellowish. The female of pollinosa
differs from that of flavipalpis by having three anterodorsal
bristles on hind tibia, by the lack of a comparatively stronger de-
veloped preapical bristle in the median posterior series of fore
femur, and by the yellowish tinge possessed by the wings.

ALASKA: 1 <, Anchorage, July 19 1921, (J. M. Aldrich), [U. S. N. M.].

ALBERTA: I o', Wabamun, July 1 1931, (E. H. Strickland), [C. N. C.].

New York: I <, Babylon, Long Island, June 15 1936, (Blanton & Borders);
I Q, Cranberry Lake, July 21 1920, [H. C. H.].

H. C. HUCKETT II!

Nova ScoTiIA: I o, Truro, July 12 1913, (R. Matheson), [H. C. H.].
ONTARIO: I o, Ottawa, June 18 1916, (W. T. M. Forbes), [A. N.S. P.].
QUEBEC: I 2, Abbotsford, June 15 1936, (G. E. Shewell), [C. N. C.].
SoutH Dakota: 1 9, Custer, July 19 1924, [South Dakota State Col.].

Pegomyia univittata (von Roser) (Figs. 26, 53, 69.)

Anthomyia univittata von Roser, Correspondenzbl. Wiirttemb. Ver., I, p. 59, 1840.

Pegomyia univittata Stein, Wien. Ent. Zeitg., xxv, p. 71, 1906. Carter, Ent.
Month. Mag., XLIv, p. 129, 1908. Stein, Arch. f. Naturgesch., (1913), LXXIX,
(A), hft. 8, p. 33, 1914. Stein, Arch. f. Naturgesch., (1915), Lxxx1, (A), hft. 10,
p. 127, 131, 1916. Karl, Tierwelt Deutschlands, x11, pt. 3, p. 126, 1928. Tien-
suu, Acta Soc. Faun. Flor. Fennica, LVI, no. 4, p. 30, 1935. Séguy, Gen.

Insect., fasc. 205, p. 65, 1937.

Pegomyia (Pegomyia) univittata Séguy, Faune de France, VI, p. 165, 1923. Ring-

dahl, Ent. Tidskr., L1x, p. 205, 1938.

The species univitiata is closely related to geniculata, from which
it may be distinguished by the darker coloration in male and pres-
ence of dark abdominal incisures in both sexes. In the female the
caudal half of frontal vitta is blackened and conjunctival membrane
between tergal sclerites of abdomen frequently marked by a stiff-
ening of the chitin, giving the appearance of a smooth narrow plate
along the caudal margin, whereas in geniculata the frontal vitta
is entirely yellowish or at most darkly suffused caudad and inter-
tergal conjunctival membrane is not stiffly chitinized. Further
comparisons between the two species may be found in the treat-
ment of geniculata.

BRITISH COLUMBIA: I <, Jordan Meadows, July 12 1928, (W. Downes); 1 &,
Saint Marys, July 12 1926, (A. A. Dennys), [C. N. C.].

CALIFORNIA: I co’, I 9, Smith River, Rowdy Creek, July 11 1930, (J. M. Ald-
rich), [U. S. N. M.].

IDAHO: 1 9, Moscow Mount, Aug. 10 1924, (A. L. Melander), [A. L. M.].

MASSACHUSETTS: 1c’, Washington, August 1; 2 o, 5 ?, Petersham, July 1926,
(A. L. Melander), [A. L. M.]. -

NEw BRUNSWICK: 1 Go’, Frederickton, July 5 1913, [C. N. C.].

NEw HAMPSHIRE: 1 <’, Milford, June 23 1917; 1 o, Mount Washington, July 12
1931, 3500 ft. alt.; 1 9, White Mountains, Dolly Copp, July 13 1931, (A. L.
Melander), [A. L. M.].

NEw York: I &, Trenton Falls, June 5-8 1921, (Leonard & Forbes); 1 9,
Shelving Rock Bridge, Lake George, September 2 1920, (M. D. Leonard), [H. C. H.].
1 9, Whiteface Mountain, Adirondacks, July 4 1922, 3800 ft. alt., (J. M. Aldrich),

MEM. AMER. ENT. SOC., 10

II2 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

[U. S. N. MJ. 2 9, Slaterville, Wild Flower Preserve, August 16 1928; 1 9,
McLean Bogs, Tompkins County, August 29 1921; 2 9, McLean, September 11
1920; 2 2, Ringwood, near Ithaca, August 17 1928; 1 o, Ithaca, July 9 1921,
[H. C. H.]. 2 o&, Adirondacks, Avalanche Trail, July 30 1929, (A. L. Melander),
[A. L. M.].

Nova Scotia: I o’, Kentville, July 9 1927, (R. P. Gorham); 1 9, Truro, Sep-
tember 19 1913, [C. N. C.].

OnTARIO: 1 9, Niagara Glen, July 1 1926, (G. S. Walley), [C. N. C.].

PENNSYLVANIA: 2 9, Dubois, September 3 1927, (A. L. Melander), [A. L. M.].

QUEBEC: I 9, Hull, September 25 1923; 1 9, Aylmer, August 16 1925, (C. H.
Curran); 1 9, Lake Edward Camp, Laurnetide Limits, September 14 1918; 1 <,
Queens Park, Aylmer, August 1 1924, (A. R. Graham), [C. N. C.].

SoutH DaKoTA:1 o, Spearfish, July 28 1924, [South Dakota State Col.].

VERMONT: 30 o’, Mount Equinox, July 15 1935, (Blanton & Borders), [H. C. H.].

WASHINGTON: I <’, 8 miles west of Snoqualmie Pass, June 29 1924; 2 9, Mount
Baker, Nooksack River, August 11 1925; 1 9, Canyon Creek, July 26 1925,
(A. L. Melander), [A. L. M.].

WyominG: 1 2, Yellowstone Park, Clematis Creek, July 9 1923, (A. L. Me-
lander), [A. L. M.].

Pegomyia geniculata (Bouché)

Anthomyia geniculata Bouché, Naturgesch. d. Ins., 1, p. 81, 1834.

Anthomyia ephippiwm Siebke, Enum. Insect. Norveg., Iv, p. 128, 1877.

Pegomyia geniculata Stein, Wien. Ent. Zeitg., XXv, p. 74, 1906. Schnabl, Hor. Soc.
Ent. Ross., XXXIX, p. 8, 9, 1910. Stein, Arch. f. Naturgesch., (1913), LXXIx,
(A), hft. 8, p. 33, 1914. Stein, Arch. f. Naturgesch., (1915), Lxxx1, (A), hft. 10,
p. 127, 1916. Stein, Arch. f. Naturgesch., (1918), Lxxxiv, (A), hft. 9, p. 72,
1920. Malloch, Bull. Brooklyn Ent. Soc., xv, p. 123, 1920. Huckett, Mem. 77,
N. Y. (Cornell) Agr. Exp. Station, (1923), p. 44, 1924. Johnson, Occ. Pap.
Boston Soc. Nat. Hist., vil, p. 232, 1925. Johnson, Proc. Boston Soc. Nat.
Hist., XXXVIII, no. 2, p. 93, 1925. Johnson, Insect Fauna, Biol. Surv. Mt.
Desert Region, p. 209, 1927. Karl, Tierwelt Deutschlands, x1m, pt. 3, p. 128,
1928. Huckett, Mem. 1o1, N. Y. (Cornell) Agr. Exp. Station, (1926), p. 840,
1928. Tiensuu, Acta Soc. Faun. Flor. Fennica, LVIII, no. 4, p. 29, 1935. Séguy,
Gen. Insect., fasc. 205, p. 56, 1937.

Pegomyia (Pegomyia) geniculata Schnabl and Dziedzicki, Abh. K. Leop.-Carol.
Deutsch. Akad. Naturforsch., Xcv, nr. 2, p. 112, 1911. Séguy, Faune de France,
VI, p. 160, 1923. Ringdahl, Ent. Tidskr., L1x, hft. 3-4, p. 203, 1938.

The species geniculata is pale yellowish in color as in unicolor
and gilva. Occasional specimens may have abdomen more or less
blackened and thorax brownish tinged. In general habitus the

H. C. HUCKETT 113

species closely resembles wnivittata, having the antennae large and
prominently set in profile, reaching ventrad to oral margin, face
is flattish ventrad, anterior margin of eye viewed in profile almost
extended to a level with facial margin, presutural series of acrosti-
cal bristles are very widely set apart, having a few setulae between
the series, in the male the processes are inconspicuous. In the
female of geniculata and univittata the fore femur has a compara-
tively stronger developed bristle apicad among the median series
on posterior surface, cruciate bristles are seldom present, caudal
pair of ocellar bristles is comparatively short and directed forward,
and caudal segments of ovipositor are weakly chitinized and bear
tufts of short black setulae laterad.

The male of geniculata differs from that of univittata in having
the thoracic pleura pale yellow, with at most one or two restricted
brownish suffusions, and abdominal terga usually pale yellow, if
blackish suffused the caudal margin of each tergum remains pale
yellow; whereas in the male of unzvittata the pleura are largely
brownish suffused or fuscous, and the terga have dark incisures
along caudal margin or are extensively blackish tinged. In the
female the tergal color and markings of geniculata differ from those
of univittata as in male, and in addition there is no stiffening of the
intertergal conjunctival membrane as is frequently apparent in
univitiata.

ALBERTA: 1 o’, I 9, Wabamun, July 9 1936;1 ¢, Gull Lake, June 28 1929; 2 <%,
Edmonton, June 10 1937, (E. H. Strickland), [Univ. Alberta].

BRITISH COLUMBIA: 3 o’, 4 2, Keremeos, June 22 1923, (C. B. D. Garrett);
I #,1I 9, Saint Marys, July 12 1926, (A. A. Dennys), [C. N. C.]. 1 9, Carbonate
to Columbia River, July 7-12 1908, 2600 ft. alt., (J. C. Bradley). [C. U.].

MASSACHUSETTS: I 92, Brookline, July 7 1903; 1 o, Petersham, June 6 1932,
(A. L. Melander), [A. L. M.].

MICHIGAN: 2 9, Isle Royale, August 3-7 1936, (C. W. Sabrosky); 1 9, Grand
Rapids, July 1 1937, (Hansens), [Mich. State Col.].

New BRUNSWICK: 1 9, Frederickton, July 5 1913, [C. N. C.].

NEw YorK:1 oo’, 1 9, Herkimer, August 8 1921, (M. D. Leonard); 1 «, Pond
at foot of Mount Redfield, Essex County, July 25 1920, 2500 ft. alt.; 1 #, I 9,
Ringwood, near Ithaca, June 13 1920, [H. C. H.]. 1 o, Peekskill, June 11 1927,
(A. L. Melander), [A. L. M.].

ONTARIO: I o’, Ottawa, June 2 1927; 1 Q, Lyn, June 7 1926, (C. H. Curran);

MEM. AMER. ENT. SOC., IO

114 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

1 @, Niagara Glen, July 1 1926, (G. S. Walley); 1 <, Orillia, June 20 1927, [C. N.
C.]. 3 3,2 2, Waubamick, June 1915, (H. S. Parish), [A. L. M.].

QUEBEC: 2 o,1 9, Covey Hill, June 25 1927, (W. J. Brown), [C. N. C.].

SoutH DaKora: 1 <, Custer, July 22 1924, [South Dakota State Col.].

VERMONT: I 9, Burlington, June 23 1906.

WASHINGTON: 2 ’, Big Four Mountain, July 5 1924;1 9@, Nasel, July 2 1925;
1 2, Mount Vernon, July 3 1924;1 9, 8 miles West of Snoqualmie Pass, June 29
1924, (A. L. Melander), [A. L. M.].

Wisconsin: 1 o’, Madison, June 4 1930;1 9, Racine, July 18 1929, (R. Bush-
nell), [Univ. Wisc.].

Pegomyia spinosissima Stein
Pegomyia spinosissima Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 242, 1898.
Stein, Arch. f. Naturgesch., (1917), Lxxxut, (A), hft. 1, p. 149, 1919. Stein,
Arch. f. Naturgesch., (1918), Lxxxtv, (A), hft., 9, p. 72, 1920. Malloch, Bull.
Brooklyn Ent. Soc., Xv, p. 124, 1920. Séguy, Gen. Insect., fasc. 205, p. 63, 1937.
In the male of spinosissima and spinigerella the costal vein has
strongly developed setulae, which in spinosissima are placed sparse-
ly or intermittently along the vein and are conspicuously long,
whilst in spinigerella they are in close serial arrangement and are
slightly shorter. In both male and female of spinosissima the
third antennal segment is largely yellowish, cheeks and inter-
frontalia are yellowish and concolorous with palpi, mid femur has
no bristle on distal half of anteroventral surface; whereas in spiniger-
ella the third antennal segment is largely blackish, interfrontalia
and cheeks deep reddish, and mid femur has a bristle on distal
half of anteroventral surface. In both species the apical postero-
dorsal bristle on fore and hind tibiae is well developed. Malloch
(1920) in his key to males of Pegomyza credits both species with
having a bristle on distal half of anteroventral surface of mid
femur. I am informed by Mr. Gerhard that this is not so in the
type specimen of spinosissima in the Hough Collection at the Field
Museum, and the specimens before me agree with the type in this
respect.
KANSAS: I o’, Lawrence, cotype, [Field Museum]. 1 o, 1927, on alfalfa, (R. C.
Smith), [U. S. N. M.].
NortH DakoTA: I <o, University, June 1896, (R. P. Currie), [U. S. N. M.].
OKLAHOMA: I Q, Stillwater, July 6 1935, (J. Stankavitch), [Okla. A. & M. Col.].

H. C. HUCKETT II5

TEXAS: I o”, College Station, May 9 1934;1 9, May 22 1917, (H. J. Reinhard),
[Texas A. & M. Col.].

Pegomyia gopheri Johnson (Figs. 19, 48, 80.)
Pegomyia gophert Johnson, Bull. Amer. Mus. Nat. Hist., XxxII, p. 77, 1913. Stein,

Arch. f. Naturgesch., (1917), Lxxxin, (A), hft. 1, p. 148, 1919. Malloch, Bull.
Brooklyn Ent. Soc., Xv, p. 124, 1920. Séguy, Gen. Insect., fasc. 205, p. 56, 1937.

The species gopheri closely resembles fimitima Stein, differing in
that the third antennal segment is more extensively yellowish
tinged, and the mid tibia has no mid anteroventral bristle.

GEORGIA: 5 9, Blythe, Richmond County, April 26 1932, from gopher burrows,
(F. Harper), [H. C. H.].

ILLINOIS: I o', Dubois, May to 1916, [Ill. N. H. S.].

KKANSAS: 2 9, Riley County, September 22.

NEw YorkK: 1 <’, Riverhead, Long Island, June 10 1926; 1 9, Ithaca, May 28
1922, [H. C. H.].

OHIO: I o', Sandusky, Cedar Point, July 15 1903, [Ohio State Univ.].

PENNSYLVANIA: I o', Montgomery County, September 11 1897.

TExaAs: 1 92, Brownsville, June 8 1904, [Texas A. & M. Col.].

WISCONSIN: I o?, Dane County, July 7 1936 (F. M. Snyder), [Univ. Wisc.].

Pegomyia finitima Stein

Pegomyia finitima Stein, Berl. Ent. Zeitschr., (1897), XLII, p. 241, 1898. Aldrich,
Mise. Coll. Smithsn. Inst., XLVI, no. 1444, p. 558, 1905. Stein, Arch. f. Natur-
gesch., (1917), LXxxmI, (A), hft. 1, p. 148, 1919. Stein, Arch. f. Naturgesch.,
(1918), LXxxIv, (A), hft. 9, p. 72, 1920. Malloch, Bull. Brooklyn Ent. Soc.,
XV, p. 124, 1920. Johnson, Occ. Pap. Boston Soc. Nat. Hist., vi, p. 232, 1925.
Séguy, Gen. Insect., fasc. 205, p. 54, 1937.

The species finttuma and gopheri are very similar in many re-
spects. Both species usually possess one or more pteropleural
setulae near the caudal pair of sternopleural bristles; these setulae
are absent in affinis. In finitima the mid tibia has a mid antero-
ventral bristle, and the third antennal segment is more deeply
tinged with black than in gophert. The genitalia of the two species
are structurally identical.

ILLinoIs:1 9, Algonquin, August 21 1894, cotype, [Ill. N.H.S.]. 1 #, McHenry,
August 21 1927, (A. L. Melander), [A. L. M.].

Iowa: 1 9, Sioux City, August 17 1927.

KANSAS: I 9, Riley County, July 10; 1 o, Onaga, [U.S. N. M.]. 1 9, Man-
hattan, April 25 1934, (C. W. Sabrosky), [Mich. State Col.].

MASSACHUSETTS: I co’, Southampton, July 9, [A. N. S. P.].

MEM. AMER. ENT. SOC., 10

I16 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

MIcHIGAN: I 9, Cheboygan County, August 7 1931, (C. W. Sabrosky), [Mich.
State Col.].

SoutH Dakota: 1 <, Brookings, cotype, [Field Museum].

WISCONSIN: 2 o, Dane County, July 10 1936, (F. M. Snyder), [Univ. Wisc.].

Pegomyia cedrica Huckett
Pegomyia cedrica Huckett, Trans. Amer. Ent. Soc., LXv, p. 21, 1939.

This robust species is not to be readily associated with others
belonging to the genus. I have included it in the rubzvora-group on
account of similarities in character of male and female copulatory
appendages and owing to the fact that the prebasal sclerite of
hypopygium is bristled. In contrast to other species of the group
cedrica has the legs, abdomen and scutellum entirely yellow.

OHIO: I #, I 9, Sandusky, Cedar Point, May 30 1903, (J. S. Hine), type and
allotype, [Ohio State Univ.].

Pegomyia pertusa Huckett
Pegomyia pertusa Huckett, Trans. Amer. Ent. Soc., LXV, p. 8, 1939.

The male of pertusa superficially resembles the species belonging
to the hyoscyami-subgroup, differing from many of such species by
having the eyes almost contiguous in male. The processes are
robust and clothed along greater part of inner border with a dense
series of longish setulae, the apical region is bare and tapering.
The type specimen is slightly teneral, hence it seems possible that
in mature specimens the yellowish areas on abdomen and scutellum
may be greatly subdued or become entirely grayish drab.

ALBERTA: I o?, Edmonton, May 8 1937, (F. O. Morrison), type, [A. N.S. P.].

Pegomyia bicolor. (Wiedemann)

Anthomyia bicolor Wiedemann, Zool. Mag., I, p. 77, 1817.

Pegomyia bicolor Macquart, Hist. Nat. Ins. Dipt., 11, p. 351, 1835. Stein, Berl.
Ent. Zeitschr., (1897), XLU, p. 239, 1898. Aldrich, Misc. Coll. Smithsn. Inst.,
XLVI, no. 1444, p. 558, 1905. Stein, Wien. Ent. Zeitg., XxXv, p. 75, 1906. Schnabl,
Hor. Soc. Ent. Ross., XXXIX, p. 8, 9, 1910. Schnabl, Deutsch. Ent. Zeitschr.,
hft. 6, p. 81, 1911. Stein, Arch. f. Naturgesch., (1913), LXxrx, (A), hft. 8, p. 33,
1914. Stein, Zool. Jahrbiichern, xxx1x, hft. 1, p. 137, 1915. Stein, Arch. f.
Naturgesch., (1915), Lxxx1, (A), hft. 10, p. 127, 1916. Malloch, Trans. Amer.
Ent. Soc., XLIV, p. 303, 1918. Stein, Arch. f. Naturgesch., (1918), Lxxxtv, (A),

H. C. HUCKETT 117

hft. 9, p. 72, 1920. Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 123, 1920. Cole
and Lovett, Proc. Cal. Acad. Sci., XI, p. 313, 1921. Huckett, Mem. 77, N. Y.
(Cornell) Agr. Exp. Station, (1923), p. 43, 1924. Hering, Zeitschr. Morph.
Okolog. Tiere, 11, hft. 2, p. 247, 1924. Frost, Mem. 78, N. Y. (Cornell) Agr. Exp.
Station, (1923), p. 100, 1924. Johnson, Occ. Pap. Boston Soc. Nat. Hist., vu, p.
232, 1925. Johnson, Insect Fauna, Biol. Surv. Mt. Desert Region, p. 209, 1927.
Karl, Tierwelt Deutschlands, x11, pt. 3, p. 124, 1928. Huckett, Mem. tor, N.
Y. (Cornell) Agr. Exp. Station, (1926), p. 840, 1928. Ringdahl, K. Svensk.
Veten. Kap. Akad. Skrift. Naturskyddsarenden, nr. 18, p. 21, 1931. Tiensuu,
Acta Soc. Faun. Flor. Fennica, LVII, no. 4, p. 30, 1935. Séguy, Gen. Insect.,
fasc. 205, p. 52, 1937.

Anthomyia (Pegomyia) bicolor Strobl, Verh. zool.-bot. Ges. Wien, XLI, p. 251,
1893.

Pegomyia (Pegomyia) bicolor Schnabl and Dziedzicki, Abh. K. Leop.-Carol. Deutsch.
Akad. Naturforsch., XCV, nr. 2, p. 112, 1911. Séguy, Faune de France, VI, p.
158, 1923. Ringdahl, Ent. Tidskr., Lrx, hft. 3-4, p. 198, 1938.

Hylemyia bicolor Hallock and Parker, Circ. 103, N. J. Dept. Agr., p. 16, 1926.

The species bicolor is typical of a small group of pegomyian flies
which may invariably be associated with each other on account of
the common characteristic form of the male processes (fig. 90).
Such a group includes the North American species ériseta and
jacobt and the european form airitarsis (Zetterstedt). In bicolor
the third antennal segment and scutellum are invariably entirely
blackish, second segment may be entirely reddish, brownish or
black. In trzseta these parts are usually partly yellowish.

ALASKA: 5 o’, I @, Katmai, June 1917, (J. S. Hine), [Ohio State Univ.].

BriTIsH COLUMBIA: I 9, Royal Oak, May 20 1917, (R. C. Treherne); 1 o,
Victoria, May 1924, (W. Downes), [C. N. C.].

IDAHO: I 9, Sweetwater, June 19 1930, [U.S. N. M.]. 1 9, Waha, August 12
1923, (A. L. Melander), [A. L. M.].

NEw BRUNSWICK: 2 @, Greys Mills, September 8 1922, (R. P. Gorham),
[C. N. C.].

NeEw York: 1 o’, Coy Glen, near Ithaca, May 14 1922; 4 o, Ithaca, May 28
1922; 1 o, Wild Flower Preserve, Slaterville, August 16 1928; 2 o&, 1 9, Harmon,
July 5 1926; 1 &, Taughanic Falls, August 18 1928; 1 co, Riverhead, Long Island,
August 6 1922; 1 9, Orient, Long Island, May 14 1936; 1 9, Southampton, Long
Island, July 15 1923; 1 <&, Greenlawn, Long Island, August 15 1922; 2 o, 1 @,
Aquebogue, Long Island, June 8 1936, (ex Rumex acetosa); 1 #, 1 9, Babylon,
Long Island, May 10 1923, (F. S. Blanton), [H. C. H.].

OuI0: 1 co, Amherst, July 1933, [Texas A. & M. Col.].

ONTARIO: 1 co’, Whitby, July 6 1926, (C. H. Curran), [C. N. C.].

MEM, AMER. ENT. SOC., IO

118 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

OREGON: 1 9, Bellefountain, May 27 1922, (A. L. Lovett); 3 #, 5 9, no data,
[Ore. State Col.].

PENNSYLVANIA: I o', Lake Leboeuf, Erie County, August 19 1924, (H. Kahl),
[Carnegie Museum]. 1 o, Mineral Spring, September 5 1927; 1 o’, I 2, Dubois,
September 3 1927, (A. L. Melander), [A. L. M.].

QUEBEC: I o’, Knowlton, June 20 1927, (G. S. Walley), [C. N. C.].

VERMONT: I o, Peru, July 15 1931, (A. L. Melander), [A. L. M.].

WASHINGTON: I o’, Cascade Lake, Orcas Island, August 17 1925; 1 9, Nooksack
River, Mount Baker, Aug. r1 1925, (A. L. Melander), [A. L. M.].

WYOMING: 1 o, Turbid Lake, Yellowstone Park, July 20 1923, (A. L. Melander),
[A. L. M.].

Pegomyia triseta Malloch (Figs. 24, 86, 91)

Pegomyia calyptrata Stein not Zetterstedt, Berl. Ent. Zeitschr., (1897), XLU, p. 237,

1898.
pace triseta Malloch, Trans. Amer. Ent. Soc., XLVI, p. 177, 1920. Malloch,

Bull. Brooklyn Ent. Soc., xv, p. 123, 1920. Johnson, Occ. Pap. Boston Soc. Nat.

Hist., VII, p. 233, 1925.

Pogonomyia triseta Séguy, Gen. Insect., fasc. 205, p. 320, 1937.

The species tviseta resembles bicolor, from which it differs by
having third antennal segment and scutellum partly yellowish.
In both species the apical posterodorsal bristle on hind tibia is
strongly developed and in male the processes are typically short
and weakly bristled, being rounded and bare on apical region.

Stein (1898) described the species as calypirata (Zetterstedt), as
indicated by the specimens in the Illinois Natural History Survey
and Field Museum collections. According to Ringdahl (1938)
calyptrata is identical with Stein’s species Pegomyia iniqua (1906),
a proposal which if accepted would provide a tangible means of
evaluating the relationship between friseta and calyptrata. I have
regarded the two species as probably distinct, since calyptrata and
iniqua evidently possess more the characteristics of winthemi than
of bicolor.

ALBERTA: I o’, Lethbridge, May 6 1923, [C. N. C.].

BRITISH COLUMBIA: I 9, Oliver, May 8 1923, (C. B. C. Garrett); 1 9, Royal
Oak, July 31 1917, (W. Downes), [C. N. C.].

ILLINOIS: I o’, White Heath, June 24 1916; 1 9, Urbana, August 4 1916, [IIl.
N. H. S.].

MANITOBA: I o?, Aweme, October 4 1923, (N. Criddle), [C. N. C.].

NEw YorK: 1 a’, Ithaca, June 1 1916, [H. C. H.].

H. C. HUCKETT 119

Ou10: 1 2, Columbus, June 1 1904, (J. S. Hine), [Ohio State Univ.].

ONTARIO: I 2, Sudbury, July 13 1889; 1 9, Trenton, August 13 1901, (vans):
1 &, Cornwall, June 27 1925, (F. Ide), [C. N. C.].

PENNSYLVANIA: I o’, Tinicum Island, April 25 1900, (C. T. Greene), [U. S. N. M.].

SoutH Dakota: 1 &, Custer, July 15 1924; 1 ¢, Big Stone, August 18 1924,
[South Dakota State Col.].

WISCONSIN: I o', Dane County, July 6 1936, (F. M. Snyder), [Univ. Wisc.].

Pegomyia rufipes (Fallén)

Musca rufipes Fallén, Muscides, p. 85, 1825.

Pegomyia rufipes Stein, Ent. Nachr., Xvi, p. 331, 1892. Stein, Wien. Ent. Zeitg.,
XXV, p. 81, 1906. Schnabl, Hor. Soc. Ent. Ross., XXxIx, p. 107, 1910. Stein,
Arch. f. Naturgesch., (1913), Lxx1x, (A), hft. 8, p. 36, 1914. Stein, Arch. f.
Naturgesch., (1915), LXxx1, (A), hft. 10, p. 125, 1916. Ringdahl, Trémso
Museums Arshefter, (1926), XLIX, no. 3, p. 33, 1928. Karl, Tierwelt Deutsch-
lands, XII, p. 138, 1928. Collin, Ann. Mag. Nat. Hist., ser. 10, VII, p. 67, 1931.
Ringdahl, K. Svensk. Veten. Kap. Akad. Skrift. Naturskyddsarenden, nr. 18,
p. 21, 1931. Tiensuu, Acta Soc. Faun. Flor. Fennica, LviitI, no. 4, p. 29, 1935.
Séguy, Gen. Insect., fasc. 205, p. 62, 1937.

Pegomyia crassicauda Stein, Entom. Nachr., XXVI, p. 320, 1900.

Hylemyia pedestris Malloch, Can. Ent., Li, p. 274, 1919. Frison, Bull. Ill. Nat.
Hist. Surv., XVI, p. 202, 1927. Séguy, Gen. Insect., fasc. 205, p. 106, 1937.

Pegomyia pedestris Malloch, Bull. Brooklyn Ent. Soc., xv, p. 126, 1920.

Pegomyia (Pegomyia) rufipes Séguy, Faune de France, vi, p. 163, 1923, Ringdahl,
Ent. Tidskr., L1x, hft. 3-4, p. 204, 1938.

The male of rufipes may be readily identified by the series of ten
or more closely set stout setulae along posteroventral surface of
hind femur. The female has palpi infuscated apicad, third antennal
segment entirely black, mesonotum grayish black, opaque, with
considerable areas adjoining and including scutellum and humeral
callosities yellowish, pleura are more or less blackish with more or
less yellowish tinge, fore femur has a comparatively stronger
bristle developed apicad among posterior median series of bristles,
series of presutural acrosticals slightly nearer to one another than
to their respective series of dorsocentral bristles, ovipositor strong-
ly chitinized and compressed as if for piercing, marginal bristles on
abdominal terga well developed on ventral aspect. In most of the
foregoing characters the female of rufipes resembles that of tenera,
differing only in that the series of presutural acrostical bristles are
more closely approximated in rufipes.

MEM. AMER. ENT. SOC., 10

120 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

Malloch (1920) has in error used the name rufipes to denote his
flavipes in the key to males of Pegomyia. There has also crept in
an error in Collin’s (1931) discussion of the differences between
males of the two species rujipes and flavipes, which may prove con-
fusing to the student. It is evident from the text that in the
comparison between male characters of the two species the names
rufipes and flavipes have been wrongly applied and should be
interchanged to put a proper construction on the statements.

BRITISH COLUMBIA: I 9, Agassiz, May 7 1926, (R. Glendenning), [C. N. C.].

MASSACHUSETTS: I @, Petersham, July 1926, (A. L. Melander), [A. L. M.].

ONTARIO: I @, Orillia, July 1923, (C. H. Curran), [C. N. C.],

QUEBEC: I o’, Godbout, July 25 1918, (E. M. Walker), paratype of pedestris
Mall. [Il]. N. H. S.].

YUKON TERRITORY: I o’, Selkirk, June 13 1909, (H. G. Dyar), [U. S. N. M.].

Pegomyia variegata Huckett

Pegomyia variegata Huckett, Trans. Amer. Ent. Soc., LXV, p. II, 1939.

I have included the species variegata in the bicolor-subgroup
largely on account of resemblances in the structure of processes in
male. The species has the palpi largely fuscous, third antennal
segment yellowish tinged proximad, apical posterodorsal bristle on
fore and hind tibiae well developed. The parafrontals of the male
may be contiguous or slightly separate, and the fore femur may be
yellow or tinged with fuscous. The female allotype specimen has
cruciate bristles present.

MARYLAND: I <, College Park, September 7 1912, mining Chenopodium am-

brosioides, 1 9; same locality, September 2 1912, type and allotype, [U. S. N. M.].
NortH CAROLINA: I o’, Wilmington, August 4 1919, [H. C. H.].

Pegomyia marginata Huckett
Pegomyia marginata Huckett, Trans. Amer. Ent. Soc., LXV, p. 7, 1939.

The male of marginata may be distinguished by the pronounced
lamellate fold extending from inner margin of processes mesad
and by the accompanying series of slender setulae from base to
apex. This type of process is also present in the european species
strigipes (Zetterstedt). The female of marginata has the palpi en-
larged and flattened, cruciate bristles absent, caudal pair of ocellar

H. C. HUCKETT 121

bristles short and directed forward, and m-—cu cross vein erect.
The scutellum is entirely blackish in both sexes.

BritisH COLUMBIA: I o’, Vancouver, August 25 1926, (J. Stanley), [C. N. C.].

IDAHO: I co’, Lake Waha, July 22 1927; 1 9, Newman Lake, May 16 1925, (A.
L. Melander), allotype, [A. L. M.].

WASHINGTON: I o’, Orcas Island, above Mt. Lake, August 8 1925, (A. L. Me-
lander), type, [A. L. M.].

Pegomyia setaria (Meigen) (Figs. 23, 85, 92.)

Anthomyia setaria Meigen, Syst. Beschr., v, p. 178, 1826. Neuhaus, Diptera
Marchica, p. 227, 1886.

Pegomyia setaria Stein, Wien. Ent. Zeitg., xxv, p. 99, 1906. Stein, Arch. f. Natur-
gesch., (1913), LXXIX, (A), hft. 8, p. 35, 1914. Stein, Arch. f. Naturgesch., (1915),
LXXXI, (A), hft. 10, p. 124, 1916. Hering, Zeitschr. Morph. Okolog. Tiere, 1,
p. 250, 1924. Karl, Tierwelt Deutschlands, xu, pt. 3, p. 135, 1928. Tiensuu,
Acta Soc. Faun. Flor. Fennica, Lviit, no. 4, p. 28, 1935. Séguy, Gen. Insect.,
fasc. 205, p. 62, 1937.

Pegomyia (Pegomyia) setaria Séguy, Faune de France, VI, p. 164, 1923.

Pegomyia polygoni Seamans, Can. Ent., LXv, p. 221, 1923. Séguy, Gen. Insect.,
fasc. 205, p. 61, 1937.

Pegomyia (Chaetopegomyia) setaria Ringdahl, Ent. Tidskr., Lxv, p. 196, 1938.
The species was first recorded by Seamans (1923) from Manitoba

under the name polygont, the larvae of which were found to mine

the leaves of Polygonum convolvulus L. I have compared speci-
mens of polygoni with the european species setaria (Meigen),
which is also reported as a leaf-miner of P. convolvulus by Hering

(1924), and find that there does not appear to be sufficient differ-

ence between the two forms to warrant their recognition as sepa-

rate species. I find it difficult to associate the species with any
particular grouping within the genus. Stein (1906) compares the
species with longimana (Pokorny) belonging to the psia-group;

Ringdahl (1938) has placed the species in a special subgenus,

Chaetopegomyia. I am inclined to believe that setaria may be

more closely linked to the bzcolor-group as indicated by the charac-

ter of the cross veins, acrostical series, and caudal pair of ocellar
bristles in female. In setarza the processes are more pliant and
slender than in bicolor, but essentially the form and bristling have
much in common in the two species. Moreover the vestiture on
ventral surface of tibiae in both species seems to be accentuated

MEM. AMER, ENT. SOC., 10

122 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

by the slightly greater length of setulae. The species setaria may
be readily distinguished from allied forms by having the thorax
and abdomen grayish black; in addition the palpi are entirely
fuscous, fore femora entirely yellowish, fore tibia has a robust
apical posterodorsal bristle, and caudal intraalar bristle is excep-
tionally long, being about equal to length of caudal dorsocentral
bristle.

BritTisH COLUMBIA: I 9, Agassiz, May 29 1922, (R. Glendenning), [C. N. C.].

MANITOBA: I co’, Aweme, May 25 1921; 1 9, same locality, May 24 1921, (N.
Criddle), type and allotype of polygoni Seamans, [C. N. C.].

MASSACHUSETTS: I 2, Chester, August 3 1911, [H. C. H.].

ONTARIO: I o', Port Hope, May 25 1925, (N. K. Bigelow), [C. N. C.].

SASKATCHEWAN: I @, Saskatoon, June 17 1924, (K. M. King), [C. N. C.].

Pegomyia vicaria Huckett
Pegomyia vicaria Huckett, Trans. Amer. Ent. Soc., LXV, p. 6, 1939.

The species vicaria conforms closely to the structure and chae-
totaxy of ruficeps, rufescens and striata in the hyoscyamt-group.
In the male of vicarza the antennae and palpi are blackish, prealar
bristle absent, fore and mid tibiae lack a mid anterodorsal bristle
and mid femora have no proximal series of bristles nor preapical
bristle on anterior surface. There is at least a trace of yellowish
suffusion on humeral callosities and scutellum. In the paratypes
the abdominal terga are almost entirely grayish black, and the
fore femora entirely yellowish or partly infuscated. In the holo-
type the abdominal terga are characterized by the presence of
considerable areas of paler (clay) color.

WASHINGTON: I co’, Lind, August 18 1919, (F. W. Carlson), type, [A. N. S. P.].
2 o, same locality and date as type, paratypes, [A. L. M.].

Pegomyia tinctisquama Huckett
Pegomyia tinctisquama Huckett, Trans. Amer. Ent. Soc., LXV, p. 26, 1939.

The male of tinctisquama has the thorax mostly deep black,
calyptrae infuscated and abdomen reddish. The palpi are entirely
fuscous and processes largely shining and bare and with setulae
only along proximal half of inner margin. Superficially the male
has the appearance of marginata in that the thorax is deep blackish

H. C. HUCKETT 123

and calyptrae infuscated, but the two species may be separated on
characters pertaining to fifth sternum. The female may be readily
distinguished on account of the abnormally large palpi, which are
broader than proboscis and protrude conspicuously beyond oral
margin, abdomen largely grayish drab with an inconspicuous red-
dish tinge, calyptrae are intensively yellowish and caudal pair of
ocellar bristles longish and directed outward.

ALBERTA: I 9, Banff, July to 1922, (C. B. D. Garrett), allotype, [C. N. C.].

BRITISH COLUMBIA: I o, Keremeos, June 20 1923, (C. B. D. Garrett), type

[C. N. C.].
WASHINGTON: I o’, Puyallup, July 30 1933, (Wm. Baker), [H. C. H.].

Pegomyia palpata Stein
Pegomyia palpata Stein, Wien. Ent. Zeitg., XXv, p. 101, 1906. Stein, Arch. f.

Naturgesch., (1913), Lxx1x, (A), hft. 8, p. 36, 1914. Séguy, Faune de France,

VI, p. 163, 1923. Karl, Tierwelt Deutschlands, x11, pt. 3, p. 141, 1928. Séguy,

Gen. Insect., fasc. 205, p. 61, 1937.

The specimen from Vermont agrees in every important respect
with Stein’s (1906) and Karl’s (1928) description of the species.
There is little doubt in my mind regarding its identity as palpata
Stein not Schnabl. Stein (1916) has pointed out that Schnabl
(1911) in error has used this name to denote Stein’s species palposa.
The female of palpata in common with that of marginata and
tinctisquama has extra large flat palpi which are sparsely clothed
with fine setulae and which are considerably infuscated. The fe-
male of palpata may be distinguished from that of marginata by
the strongly developed cruciate bristles and caudal pair of ocellar
bristles, and from that of tinctisquama by the reddish abdomen and
darker colored fore and mid tibiae. In the specimens before me
the abdomen of females of marginata and tinctisquama is grayish or
brownish drab and noticeably subshining.

VERMONT: 1 2, Mount Ascutney, July 11 1908, 2500 ft. alt.

Pegomyia sitiens Huckett
Pegomyia sitiens Huckett, Trans. Amer. Ent. Soc., LXV, p. 9, 1939.

The species sztiens structurally resembles the european form
esurtens (Meigen), differing only in the general color of second

MEM. AMER. ENT. SOC., IO

I24 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

antennal segment and abdomen, which is reddish, and in the con-
trasting paler and darker regions of the palpi. In esurziens these
parts are entirely blackish or brownish. In the series of specimens
before me there is a wide degree of variation in extent to which
the abdomen is tinged with fuscous. In two specimens, male and
female, the abdomen appears extensively grayish black with
fuscous dorsocentral vitta. In the male the frontal vitta may be
continuous or interrupted at middle by approximation of para-
frontals, mid and hind femora may be entirely yellowish or have
a fuscous area on dorsal surface apicad, and in one or two specimens
the wings appear slightly brownish tinged. I consider the species
to be more closely linked to the albimargo-subgroup than to that
of bicolor or hyoscyami chiefly on account of the interserial mark-
ings on male mesonotum.

ALASKA: I 9, Fairbanks, June 31 1921, [U. S. N. M.].

ALBERTA: I o’, Lethbridge, June 6 1923, (H. L. Seamans); 1 9, Banff, July 16
1922, (C. B. D. Garrett), type and allotype, [C. N. C.]. 1 &, Brooks, May 20 1923
(Walter Carter); 1 2, Tilley, June 11 1923, [C. N. C.]. 1 @, Edmonton, May 15
1937, paratype, [A. N. S. P.]. 1 &, Wetaskiwin, May 6 1937, (F. O. Morrison),
[Univ. Alberta].

BritisH CoLuMBIA: 1 @, Oliver, June 6 1923, (C. B. D. Garrett), [C. N. C.].

CONNECTICUT: I <o, Watertown, June 5 1931, (A. L. Melander), paratype,
[A. L. M.].

MANITOBA: I 9, Treesbank, June 3 1925, (R. M. White), [C. N. C.].

New York: 1 oc, Montezuma Marshes, Cayuga County, July I 1920; 1 &,
Valley Stream, Long Island, April 27 1921, [H. C. H.].

ONTARIO: I 9, Port Hope, May 25 1925, (N. K. Bigelow), [C. N. C.].

SASKATCHEWAN: 2 <7, Regina, June 5 1904, (T. N. Willing), [C. N. C.].

SoutH DaKoTA: 1 <’, Brookings, July 19 1925, (H. C. Severin), [South Dakota
State Col.].

WIsconsIN: I ?, Dane County, July 1o 1936, (F. M. Snyder), [Univ. Wisc.].

Wyominc: 1 9, Yellowstone Canyon, July 12 1922; 1 9, Yellowstone Park,
Clematis Creek, July 9 1923, (A. L. Melander), paratypes, [A. L. M.].

Pegomyia carduorum Huckett
Pegomyia carduorum Huckett, Trans. Amer. Ent. Soc., LXV, p. I, 1939.
The species carduorum belongs to the hyoscyami-subgroup. In

the male it may be distinguished by the yellowish bare truncated
processes, absence of bristle at middle of anterodorsal surface of

H. C. HUCKETT 125

mid tibia, faintly yellowish tinge to scutellum and decidedly yel-
lowish calyptrae, yellowish to reddish abdomen. The female of
carduorum has no mid anterodorsal bristle on fore tibia, marginal
bristles on tergum 5 and ventral bristle of caudal pair of sterno-
pleurals are weakly developed, and scutellum and calyptrae, as in
male, have a yellowish tinge.

Adults have been reared from larvae mining the leaves of
Cirstum discolor,*® and in this respect the species displays habits
similar to that of the european form P. steznz Hendel,*® the larvae
of which are known to mine the leaves of several species of Cirsium.
I have been able to examine the male of steznz through the courtesy
of Dr. Martin Hering, and find that the two species differ in many
respects as indicated by the structure of the copulatory append-
ages, color of palpi and breadth of frons.

ALBERTA: I o', Edmonton, July 13 1936, (E. H. Strickland), [C. N. C.].

NEw YORK: 1 o’,1 9, Riverhead, Long Island, July 3 1937, ex Cirsium discolor,
{H. C. H.].

PENNSYLVANIA: I @, Arendtsville, July 6 1927, (S. W. Frost), allotype, [A. N.
S.P.]. 1 o, same locality, July 3 1927, ex Cirsium, [H. C. H.].

SoutH DaAKoTA: 1 <, Elk Point, June 19 1924, [South Dakota State Col.].

WASHINGTON: I 9, Mount Rainier, White River, July 20 1924, (A. L. Me-
lander), [A. L. M.].

WISCONSIN: I o?, Madison, May 14 1936, (F. M. Snyder), type, [Univ. Wisc.].

Pegomyia caesia Stein
Pegomyia caesia Stein, Wien. Ent. Zeitg., 1906, XXv, p. 78. Stein, Arch. f. Natur-
gesch., (1913), Lxx1x, (A), hft. 8, p. 36, 1914. Stein, Arch. f. Naturgesch.,

(1915), LXXxI, (A), hft. 10, p. 126, 1916. Karl, Tierwelt Deutschlands, x11,

pt. 3, p. 140, 1928. Séguy, Gen. Insect., fasc. 205, p. 53, 1937.

Pegomyia (Pegomyia) caesia Séguy, Faune de France, VI, p. 158, 1923. Ringdahl,

Ent. Tidskr., L1x, hft. 3-4, p. 200, 1938.

I have tentatively concluded that the series of female specimens
listed below belong to P. caesia Stein, a male specimen of which
was kindly furnished me by Mr. Ringdahl for comparative study.

38 Kindly identified by Dr. K. M. Wiegand, Cornell University,

39 Hendel F. Neue europidische Minierfliegen. (8. Beitrag zur Blattminenkunde
Europas). Konowia, Iv, heft 5, p. 304, 1925.

MEM. AMER. ENT. SOC., IO

126 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

The species does not fall readily into any of the lesser segregates
into which I have divided the genus. The male has the habitus of
the hyoscyamt-subgroup, but this is apparently not so in the female
which has a strong pair of cruciate bristles and stiffly chitinized
polished sclerites on ovipositor. The species has three pairs of
well developed presutural acrostical bristles in series which are not
close to one another. The middle pair of presutural acrostical
bristles is nearly as long as the first pair of dorsocentral bristles.
The thorax is entirely blackish and abdomen reddish yellow, in-
cluding the processes of male. Parafacials and cheeks are not
extensively broadened when viewed in profile, the latter being
slightly narrower caudad.

ALBERTA: I 9, Banff, June 24 1922; 1 9, July 6 1922, (C. B. D. Garrett),
[C. N. C.]. 1 9, Edmonton, June 10 1937, (E. H. Strickland), [Univ. Alberta].

BRITISH COLUMBIA: I Q, Keremeos, June 17 1923; 3 9, June 21 1923; 2 9,
June 25 1923, (C. B. D. Garrett), [C. N. C.].

Pegomyia alticola Huckett
Pegomyia alticola Huckett, Trans. Amer. Ent. Soc., LXV, p. 25, 1939.

The species alticola differs from any known to me as belonging
to the genus on account of the peculiar pair of accessory sclerites
adjoining the fifth sternum in male, from which arise a prominent
series of curved bristles. In the female the fore tibiae are con-
spicuously infuscated and each has two fine posteroventral bristles.

ALASKA: 1 9, Savonoski, Naknek Lake, June 1919, (J. S. Hine), allotype, [A. N.
Sb IIb
Ura: 1 o, Uintah Mountains, Mirror Lake, no date, type, [A. N.S. P.].

Pegomyia hyoscyami (Panzer)

Musca hyoscyami Panzer, Faun. Germ., CVII, p. 13, 1809.

Pegomyia hyoscyami Robineau-Desvoidy, Essai Myod., p. 598, 1830. Stein»
Wien. Ent. Zeitg., xxv, p. 94, 1906. Schnabl, Hor. Soc. Ent. Ross., XXXIX, p.
8,9, 1910. Schnabl, Deutsch. Ent. Zeitschr., hft. 6, p. 82, 1911. Stein, Arch. f.
Naturgesch., (1913), LXx1x, (A), hft. 8, p. 35, 1914. Stein, Arch. f. Naturgesch.,
(1915), Lxxx1, (A), hft. 10, p. 124, 1916. Malloch, Trans. Amer. Ent. Soc.,
XLIV, p. 300, 1918. Britton, Bull. 31, Conn. Geol. Nat. Hist. Surv., p. 199, 1920.
Malloch, Bull. Brooklyn Ent. Soc., Xv, p. 123, 1920. Cole and Lovett, Proc.
Cal. Acad. Sci., x1, p. 313, 1921. Huckett, Ann. Ent. Soc. Amer., XIv, p. 313,

H,. C. HUCKETT 127

1921. Huckett, Mem. 77, N. Y. (Cornell) Agr. Exp. Station, (1923), p. I10,

1924. Johnson, Occ. Pap. Boston Soc. Nat. Hist., vu, p. 232,.1925. Johnson,

Insect. Fauna, Biol. Surv. Mt. Desert Region, p. 209, 1927. Ringdahl, Tr¢émso

Museums Arshefter, (1926), XLIX, no. 3, p. 32, 1928. Huckett, Mem. 1o1, N. Y.

(Cornell) Agr. Exp. Station, (1926), p. 840, 1928. Karl, Tierwelt Deutschlands,

XIII, pt. 3, p. 133, 1928. Séguy, Encycl. Entom., Dipt., vi, p. 80, 1932. Tiensuu,

Acta Soc. Faun. Flor. Fennica, LVItI, no. 4, p. 28, 1935. Séguy, Gen. Insect.,

fasc. 205, p. 56, 1937.

Anthomyza conformis Zetterstedt, Dipt. Scand., Iv, p. 1704, 1845. Siebke, Enum.
Insect. Norveg., IV, p. 121, 1877.

Pegomyia vicina Lintner, st Ann. Rept. N. Y. State Ent., (1882), p. 209, 1883.
Slosson, Ent. News, VIII, p. 239, 1897. Aldrich, Misc. Coll. Smithsn. Inst.,
XLVI, no. 1444, p. 558, 1905. Smith, Ann. Rept. N. J. State Museum 19009, p.
792, 1910. Stein, Arch. f. Naturgesch., (1917), Lxxxull, (A), hft. 1, p. 149, 1919.

Pegomyia (Pegomyia) hyoscyami Schnabl and Dziedzicki, Abh. K. Leop.-Carol.
Deutsch. Akad. Naturforsch., Xcv, nr. 2, p. 112, 1911. Séguy, Faune de France,
VI, p. 160, 1923. Ringdahl, Ent. Tidskr., L1x, hft. 3-4, p. 198, 1938.

The larvae of the species hyoscyami are commonly found mining
the leaves of spinach, beets, swiss chard, mangolds, Dianthus, and
several weeds including Arctium lappa, Chenopodium album,
Atriplex hastata. Color differences in the adults emerging from
larval rearings from various host plants have given rise to numer-
ous varietal names, but I have as yet been unable to recognize
these forms from specimens occurring in North America. It is
most probable that all species to be included in the subgroup
hyoscyami will be found eventually to be leaf-miners. The adults
of the species in this segregate are characterized by having the
parafacials, parafrontals and cheeks boldly developed and main-
tained, the lower portion of occiput swollen, frequently the an-
tennae are reduced in size and oral margin between vibrissae
constricted, prealar bristle is weak or absent, and lower sterno-
pleural bristle of caudal pair short, processes are weakly bristled
and taper distad, in the female the ventral sclerites of ovipositor
are broadly extended and densely clothed with minute setulae,
hind tibia often with more than the customary pair of bristles on
antero- and posterodorsal surfaces, costa bare on proximal half of
lower surface.

The species hyoscyami resembles carduorum, indicta and con-
vergens. In the two latter species all the femora are extensively

MEM. AMER. ENT. SOC., IO

128 NORTH AMERICAN GENUS PEGOMYIA (DIPTERA: MUSCIDAE)

infuscated, and in carduorum the scutellum and calyptrae are
yellowish tinged.

ALASKA: 1 Q, Fairbanks, June 29 1921;1 9, Seward, July 24 1921, [U. S. N. M.]-

ALBERTA: 2 o’, Lake Newell, June 9 1923, (Walter Carter); 1 &, Chin, June 7
1923, (H. L. Seamans), [C. N. C.]. 1 &, Lethbridge, August 7 1923; 2 9, Wetaski-
win, June 6 1937, (F. O. Morrison); I o,St. Paul, June 21 1938, (E. H. Strickland),
[Univ. Alberta].

BRITISH COLUMBIA: I o&, Keremeos, June 30 1923, (C. B. D. Garrett), [C. N. C.].

CALIFORNIA: I 9, Downey, September 27 1933; 1 o, Millbrae, San Mateo
County, February 20, [A. N. S. P.].

INDIANA: 2 o', 4 9, Lafayette, reared from Chenopodium, (J. J. Davis), [U.S.
N. M.].

MASSACHUSETTS: I o', Edgartown, June 29 1912.

MINNESOTA: I o’, St. Paul, April 24 1921, (P. Keene).

NEw YorK:4 o, 2 2, Elmont, Long Island, May 16 1921;4 &, 3 9, Riverhead,
Long Island, July 4 1935, ex Chenopodium album: 2 #, 2 9, Orient, Long Island,
June 6 1936, ex Atriplex hastata: 1 9, Ithaca, August 25 1920, ex beet leaves,
[H. C H.].

ONTARIO: I 9, Burlington, August 9 1919, [H. C. H.]. 1 9, Binville, July 30
1913, (W. A. Ross), [C. N. C.].

QUEBEC: I <o, Lake Lachine, June 10 1926, (F. P. Ide), [C. N. C.].

UTAH: I o, Saratoga, July 23 1929; 1 9, Hooper, April 23 1934, (G. F. Knowl-
ton); 1 o, Fort Duchesne, July 9 1931, (R. L. Jane), [Utah Agr. Col.].

INDEX.

Names quoted in synonymy are given in ttalics.

ADNOKMIS TPs esis eo OL Shes els 97
acutipennis.................... 67
BVO OUOVISI. bse so ue eateries 66, 75
Alloeostylus (see diaphanus)

alticolammurr. sctics ona ae ae. 126
anabnonmiseece hn Atiae ee 68
Anlalisnes Meer tes tte Fhe ee 51
aninotataeeenn a eek see ee 72
AnOnutane yas wes eae gI
ANTM OTNINAE Ye cle digtele ees. cra eiatete oe &

(See also ephippium, flavo-
scullata, lenis, praepotens, sila-
cea, substituta, tunicata, vir-
ginea)

Anthomyza (see conformis)

BpIGAlismereteen ert te. sears: 63
apicalis, Eremomyia............ 62
artica, Wylemyia............... 52
AsSimMilishin wake mine mac aacacuks 62
ALLAN Stace cane Oe a oer oe Thi
balms eerie ton ye ote sentecwes oe. Se 89
ICOLOT er ey we eee ts 116
Divitiatary Pew erty coe eae 9o
brassicae, Hylemia............. 10
buceulentaren gees ck ee uae 10
CAdUCAR arate RISC ie aac gI
CACSIA en eee Seen ener 125
Caly ptrataen few ecnins ani susicanien 10
Cardone rear 124
GCedicay oe respi entree 116
(OMAGH Ue hcch rare hay Cae epee 5
Chortop ioe ee 5
(See also quintilis, sepia)

Ghipyisid agp aa eee Aten es oe dees oie 88
Coenosia (see substituta)

Conformist <7) att neste oe eas 107
conformis, Anthomyza..........127
CORTICAL remy ste atee ct 73

MEM. AMER. ENT. SOC., 10

COMNERA anne an Cpe ere ae een 78
CONVERZENSIa Caen eae te 75
COnPUP tar Gesinlesenn cee ete eo
COStANS ee et yy, Cone eee > oS
COSSUOBUED so ccccccccscvcvvcve 119
GRESCaNS ant eek ene ee 86
CULICOMIS wee ars eS 54
diaphanus, Alloeostylus.......... 8
dissecta was asada nce ae eee 55
duplicatans 7 on cee soe 94
| Sed KSeraem tees aaa ero t one Hea sone d che 6
(See also tunica)
EMIMESIAzs ac: seen eae Oe 79
ephippium, Anthomyia......... 112

Eremomyia (see apicalis)

AMAIA 6 oe 6 ee eae ee 115
Hawa CANS 2c; cayceare eat oeah ree ee 84
favatronS a... eae eee Ne ee 71
Mavipalpistycs.tm.a eee eee 109
SLOUUDOS som cn or ee 98
flavoscutellata, Anthomyia....... 9
Pa gidaie.s pace Aa ee 90
SUI OUG eae ee ee ee ee ee 71
Ul SENS ices cg Pe EO 5
TUVTMOSNWVIS oo gosacnaaccas eaten: 58
fuscicaudayc necator te ore oe 64
PLUS CUCU US Monica: oe pe eee 94
fuscofasciata, 4),.j4 4050. 8 acaeeos 102
genticulataiy, «ce seen ee 112
GilvViae ators Seema ee era 104
Slab rane seo Lee ee 61
SOPH ETA asa sare Merce eeew Ree a 115
haemorrhoadeeeene errr 58

Hydrophoria (see orientalis)

130

Hylemyia (see artica, brassicae)

hy OSCY AMAL. 25.0: ineieyehe codes aoe eee 126
PCLERICAL. en jancnace eee ee 58
TMICISIVASS = acanccds cae eee 106
INCOMPletal. +s. onan eee Re 62
INGICtA... ci: dee ee ee ee ee 77
INteKSeCta. ac oe jase 52, 50
JaACODL.oe a4 eee ee eee ae 76
juventlisy S..7..0a as oe eee Wal
labrad orensisne eter 80
latipalpis.2c aoe eae 56
LGHIGESIS. 22: ee ee 102
lativiligia eo eee ene 90
lenisayAntthomiyialeee ine 8
lipsia.. 2k cor ome eo e 87
littoraliss2.:: cad ary eo eee 53
lividiventriss ere coe eee 80
longiconnlisaenenee eee ee 70
longimana=... eee ye 95
lunatifronss A sersene omc oie 69
Luteolas 33 none ee 105
IMA OL sc yei steerer eer 61
mialllO@ht) cae eae See Oe Oe IOI
Mavginata <2) eos severed are ere 120
MANU a i ee 69
TTI Cal -< cera eae eee oe 74
neglecta, Phorbia............... 52
MUSTACEDS kin ee oe 100
MIGUItALSIS:: o/s ciara eee ete 83
nigroscutellata................. 57
mutet hula ee ak een ee 10, 12
INUGGIIG geste Coen 5
INGDUDEDIO 8s ee) cod ee 5
ODN OTIS his Ante eee 108
ODSCURIOI Ry sade hoecenen ee 98, 107
Qnvenialisi AG neces yee eee 51
DOL Rrary, erica aia Romine Ae 105

Palpatamerrnciorte cet c oes 51, 123

PalpOsaly pence eae 51
DAR Gltaye sees wearageek eee en eee 80
pedestrisy ty se eee 119
Pegoplata'y... 430 cen eee 6
pertusats pS ee oe eee 116
PROVES Lh oe on oe 5
Phorbiainc. tats ote eee 6
(See also neglecta)

pildsar.is Aso: Gets ee 98
POllin@sa® .A 7. ashe eee ees eee 110
DOU COND a Nae ee ee 121
praepotens, Anthomyia........... 8
pseudodissecta................. 54
Quadnispinosay.. 4540-4 eee gI
quintilis, Chortophila........... 52
FECtUTONS 52 soins eo aie) Wee 108
RUDIVOLaz aca seca aes ee 60
TUleScenSiea cc sn acre ee 74
TUMICE DS). fs, oo ey ee WB
Huda, Se aes ee ee 100
is1D0 Oh OS urna” cane Meta ease Ativan) 2 119
rumicifoliae (Huckett).......... 81
sepia, Chortophila.............. 10
sepiellay Maciviicne sin Saran ate 53
Setanlar ae ant natant eee 121
silacea, Anthomyia.............. 8
SILIEHS ha phere aie ete 123
SCHLORMIS A> <2 eam tee ee 93
SOLE an sauce ee eee II, I2
SCtOSal Ree. yt erent eee 10
SIOSSONGCrm is ene ee ee ee 57
socialis, Spilogaster............. 10
Solitaria. “hen csc ees ee Oe ee 96
Spilogaster (see socialis)

spimigrellai ne oisc ue es eee 65
spinosissima.................. 114
SCULCINA CL mara eee 100
Stlembainc5 Scheer oe ee 12
SUHlatA ce; crsamus ts cet cance eee 76
SUD ENUSE Dae ee ROL eee eee gI
substituta, Anthomyia........... 87
substituta, Coenosia............. 9
Sulbstiiatte] aaa ene 84

INDEX nan

CATSatay wees aca ewioite ieeeares 85 UNICOLOG Meters eee ee te eee owe 100
PEMERA vee Miro aeioci nad Deca 98, 107 univittata........ LL Ee III
Chrixiawetesee eerie eee cee os 62
{OUNCHIG|UNT a onan conagesasaoa: 122 VIROL WASE ss oop cosas ceraaccuecy 75
transversalis@a ssn aes once 58 Walle aitalrn cm t at ee rane 120
RUNMOEN a aacvocanccoceosuge 10, 12 WACAT I 27 aren cg ce een 122
GhiSC Laer treee tes cae eam ee 118 CUR oy no 06000 bed 08RD osl08 66, 127
thivittatal ne cen ccis ne cee Awe 10 virginea, Anthomyia.......... 7, 12
tundrica, Egle.................. 55 VALE C2 eee 103
tunicata, Anthomyia............. 8 : :

WaAmthemias. son au was eee IOI, 102
unguiculataseene same aaa oer 97 LEDUC IIA aeRO 5

MEM. AMER. ENT. SOC., 10

JIL AS)

PVA
Dorsal or caudal aspect of male copulatory appendages

Fig. 1.—Pegomyia palposa (Stein)

Fig. 2.—Pegomyia intersecta (Meigen)

Fig. 3.—Pegomyia unguiculata Malloch

Fig. 4.—Pegomyia littoralis Malloch

Fig. 5.—Pegomyia nigroscutellata (Stein)
Fig. 6.—Pegomyia pseudodissecta (Ringdahl)
Fig. 7.—Pegomyia glabra (Stein)

Fig. 8.—Pegomyia incompleta (Stein)

Fig. 9.—Pegomyia acutipennis Malloch

Fig. 10.—Pegomyia major (Malloch)

PuaTE I.

Mem. AMER. ENT. Soc., No. Io.

HUCKETT—PEGOMYIA

PLATE II
Dorsal or caudal aspect of male copulatory appendages.

Fig. 11.—Pegomyia quadrispinosa (Malloch)
Fig. 12—Pegomyia substriatella (Malloch)
Fig. 13.—Pegomyia apicalis (Stein)

Fig. 14.—Pegomyia duplicata (Malloch)
Fig. 15.—Pegomyia frigida (Zetterstedt)
Fig. 16.—Pegomyia tarsata (van der Wulp)
Fig. 17.—Pegomyia longimana (Pokorny)
Fig. 18.—Pegomyia spinigerella Malloch
Fig. 19.—Pegomyia gopheri Johnson

PLATE II.

Mem. Amemr. ENT. Soc., No. 10.

PEGOMYIA

sO 0

PLATE III

Dorsal or caudal aspect of male copulatory appendages.

Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

20.—Pegomyia flavifrons (Walker)
21.—Pegomyia cognata Stein
22.—Pegomyia ruficeps Stein
23.—Pegomyia setaria (Meigen)
24.—Pegomyia triseta Malloch
25.—Pegomyia flavipalpis (Zetterstedt)
26.—Pegomyia univittata (von Roser)
27.—Pegomyia unicolor Stein
28.—Pegomyia incisiva Stein

29.—Pegomyia pilosa Stein

PLATE III.

Mem. AMER. ENT. Soc., No. 10.

HUCKETT—PEGOMYIA

PLATE IV

Lateral aspect of male copulatory appendages.

Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

30.—Pegomyia palposa (Stein)
31.—Pegomyia intersecta (Meigen)
32.—Pegomyia unguiculata Malloch
33.—Pegomyia littoralis Malloch
34.—Pegomyia pseudodissecta (Ringdahl)
35.—Pegomyia glabra (Stein)
36.—Pegomyia nigroscutellata (Stein)
37.—Pegomyia incompleta (Stein)
38.—Pegomyia acutipennis Malloch
39.—Pegomyia major (Malloch)

Mem. AMER. ENT. Soc., No. Io. PLATE IV.

HUCKETT—PEGOMYIA

PLATE V

Lateral aspect of male copulatory appendages.

Fig. 40.—Pegomyia quadrispinosa (Malloch)
Fig. 41.—Pegomyia apicalis (Stein)

Fig. 42.—Pegomyia duplicata (Malloch)

Fig. 43.—Pegomyia tarsata (van der Wulp)
Fig. 44.—Pegomyia longimana (Pokorny)
Fig. 45.—Pegomyia substriatella (Malloch)

Mem. AMER. Ent. Soc., No. 10. PLATE V.

HUCKETT—PEGOMYIA

PLATE VI

Lateral aspect of male copulatory appendages.

Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

46.—Pegomyia frigida (Zetterstedt)
47.—Pegomyia spinigerella Malloch
48.—Pegomyia gopher Johnson
49.—Pegomyia pilosa Stein
50.—Pegomyia incisiva Stein
51.—Pegomyia unicolor Stein
52.—Pegomyia flavipalpis (Zetterstedt)

53.—Pegomyia univittata (von Roser)

PLATE VI.

Mem. AMER. Ent. Soc., No. Io.

HUCKETT—PEGOMYIA

PLATE VII

Ventral aspect of fifth abdominal sternum in male.

Fig. 54.—Pegomyia palposa (Stein)

Fig. 55.—Pegomyia intersecta (Meigen)

Fig. 56.—Pegomyia ungurculata Malloch
Fig. 57.—Pegomyiu littoralis Malloch

Fig. 58.—Pegomyia glabra (Stein)

Fig. 59.—Pegomyia acutipennis Malloch
Fig. 60.—Pegomyia nigroscutellata (Stein)
Fig. 61.—Pegomyia dissecta (Meigen)

Fig. 62.—Pegomyia pseudodissecta (Ringdahl)
Fig. 63.—Pegomyia vanduzeei Malloch

Fig. 64.—Pegomyia incisiva Stein

Fig. 65.—Pegomyia pilosa Stein

Fig. 66.—Pegomyia gilva (Zetterstedt)

Fig. 67.—Pegomyia unicolor Stein

Fig. 68.—Pegomyia flavipalpis (Zetterstedt)

Fig. 69.—Pegomyia umivittata (von Roser)

Mem. Ame_er. Ent. Soc., No. Io. PLATE VII.

HUCKETT—PEGOMYIA

PLATE VIII

Ventral aspect of fifth abdominal sternum in male.

Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

70.—Pegomyia incompleta (Stein)
71.—Pegomyia major (Malloch)
72.—Pegomyia quadrispinosa (Malloch)
73.—Pegomyia subsiriatella (Malloch)
74.—Pegomyia apicalis (Stein)
75.—Pegomyia duplicata (Malloch)
76.—Pegomyia tarsata (van der Wulp)
77.—Pegomyia longimana (Pokorny)
78.— Pegomyia lipsia (Walker)
79.—Pegomyia frigida (Zetterstedt)
80.—Pegomyia gopheri Johnson

81.—Pegomyia spinigerella Malloch

Mem. Amer. Ent. Soc., No. 10. Piate VIII.

HUCKETT—PEGOMYIA

PLATE IX
Lateral aspect of male copulatory appendages.

Fig. 82.—Pegomyia cognata Stein

Fig. 83.—Pegomyia flavifrons (Walker)
Fig. 84.—Pegomyia ruficeps Stein

Fig. 85.—Pegomyia setaria (Meigen)
Fig. 86.—Pegomyia triseta Malloch

Ventral aspect of fifth abdominal sternum in male.

Fig. 87.—Pegomyia flavifrons (Walker)
Fig. 88.—Pegomyia ruficeps Stein

Fig. 89.—Pegomyia cognata Stein

Fig. 90.—Pegomyia bicolor (Wiedemann)
Fig. 91.—Pegomyia triseta Malloch

Fig. 92.—Pegomyia setaria (Meigen)

Lateral aspect of male head.

Fig. 93.—Pegomyia hyoscyami (Panzer)
Fig. 94.—Pegomyia geniculata (Bouché)

Mem. Ame_r. ENT. Soc., No. Io. PLATE [X.

HUCKETT—PEGOMYIA

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