28 DIPTERA : 
Terminal filament slender, pointed, middle process of left 
valve broad and rounded; metatarsal spines absent in 
female. 0 eL e. o. RN o. ed a oen cO Ca] o RES OMEDRRUS OT ERU 
1r. Tarsi entirely black, their spongy pubescence dark gray, 
puilidüsky . . . . . . . «4... 4 1 272 224EÀ, NIGRIPES, BOV. 6p (2)- 
Hind metatarsi yellow, their spongy pubescence concolor- 
ous, all pulvilli whitish . . 0€ n DR eo rus iie MREATARSALIS, HOV. L3 ; 
12. Pile of mesonotum black; wings usually quite dark toward 
base; ovipositor cylindrical; metatarsal spines present 
miemse.-. . 7. . . . . 2.5. ola Pa 0 I MN SUBIECTOR, VETE. 
Pile of mesonotum yellow; wings uniformly subhyaline; 
base of ovipositor greatly swollen and deformed; hind de 
metatarsi of female not spinose. . . . . . . . . E.GENITIVUS, nov. sp. (4). 
(1) Euhybos sordipes, nov.sp. — Male. Length 3.5 mm. Black, including nearly all of legs, base of wings 
infumated, hind metatarsi of maletrispinose. Third antennal joint elliptical, twice as long as wide, arista two and one-half 
times antennal length ; occiput fulvo-pollinose. Notal hairs long, sparse and blackish, four lateral hairs on scutellum, dust 
at back of mesonotum fulvous. Abdomen bronzed, hairs whitish, pygidium subglobose, black hairy, the flat elliptical 
piece of the left side between the upper and lower valves large, extending fully half-way to the end of the pygidium, left 
valve with lobe above at apex, terminal filament very thin, sharply pointed, hairy, its base abruptly deformed and expanded, 
right valve sharply excised at apex. Legs mostly black, base of anterior tarsi piceous, base of hind tarsi brown, hairs 
mostly black, those of anterior tibiae and tarsi brown, of hind tarsi reddish, of hind coxz yellow, hind trochanters with 
single spine, hind femora robust and spinose, with nine spines in front below, two anterior and three dorsal, none on middle 
posterior face, flexor spines irregular, arising from small tubercles, geniculation of the simple, curved hind tibize dark 
castaneous, pulvilli gray. Wings normal, the basal darkening merging with the hyaline apex, stigma dark but almost 
continuous with the basal darkening, sections of fourth vein 2 : 1. 
Female. Hind femora relatively slender, less spinose, no dorsal, one anterior spine; apical segments of abdomen 
simple. 
Four specimens, Mer Bleue, Ottawa, 11 August, 1923, F. Ide, Type and allotype in Canadian National Museum, 
two male paratypes retained. 
(2) Euhybos nigripes, nov. sp. — Length 3.5 mm. Shining jet black with entirely black legs, the hind metatarsi 
with two or three spinous' black bristles on the outer side, wings fuliginous toward the base. Eyes narrowly separated 
below the antennze, the face long and linear; third joint of the antennze twice as long as wide, the arista less than twice as 
long as the antenna, Mesonotal hairs long, rather abundant and black, scutellum with two bristles and about five pairs of 
hairs, pile of the abdomen long and whitish. Upper valve of the pygidium but slightly convex, loosely hairy, shining only 
at the truncated tip and without a subapical tooth on the right side, terminal filament obliquely truncated at the end : 
ovipositor more or less conical, usually showing a Y-shaped carina and polished trapezoidal basal piece, and pollinose 
below. Knees black like the remainder of the legs, middle tibize with about six extensor bristles, the apical bristles long and 
black, bristles of the tarsi black, but the shorter hairs of the anterior tibize and tarsi pale, hind femora moderately clavate and 
spinose beneath, hind metatarsi bearing a couple of long slender extensor bristles and two or three stout bristles on the 
outer side, one or two of the latter located near the base and one at thetip; pulvilli dusky. In the female the spines are less 
pronounced, the spur of the hind trochanters absent, the spinous bristles of the hind femora reduced and the spines of the 
hind metatarsi present only as finer bristles, Wings smoky to beyond the middle, passing gradually into the gray tip, 
stigma weak, filling the marginal cell, costal cell not bowed. 
Numerous specimens : Vermont, Massachusetts (G. de N. Hough and C. W. Johnson), New York (C. T. Brues and 
O. A, Johannsen), New Jersey (C. T. Greene), Pennsylvania (E. T. Cresson, Jr.), Virginia (N. Banks), Illinois, Missouri 
(C. F. Adams). 
(3) Euhybos metatarsalis, nov. sp. — A series of specimens from the Okefenokee Swamp, Georgia, collected by 
J.€ Bradley, and also from Tifton, Georgia, received from Dr Hough, Sumter, South Carolina (Sturtevant) and Kushla 
and Saraland, Alabama (Sturtevant), differ from nigripes, in their smaller size, measuring three millimeters or less, and in 
having the hind metatarsi and more or less of the soles of the following joints yellow. "The pubescence of the sole is yellow 
and not grayish as in the black-footed form. The pulvilli are yellowish. In addition, the notal hairs are shorter and less 
dense, the slender bristles of the anterior tibiae and tarsi are shorter, the hind metatarsi are a little stouter and their spines 
stronger, The metatarsal spines are evident in the female also, as in nigripes. 
(4) Euhybos genitivus, nov.sp. — Length 3.5 mm. This species is essentially distinct in its curious ovipositor ; 
in other respects it closely resembles subjectus, as identified by Coquillett. Eyes contiguous except for a small subantennal 
.triangular spaces; third joint of the antennze two and one-half times as long as wide, the arista slightly more than twice the 
