3o DIPTERA 
valve likea large hooked beak ; base of ovipositor strongly 
constricted in the middle. . . . - . « «E. GRYPHUS, nov. sp. (1). 
26. Apical process of ventral valve viglt-pobited, dis prong at 
middle of left side of ventral valve directed obliquely 
backward and broadly rounded at apex . . . . . . E. TRIPLEX, nov. var. sIMPLEX (2). 
Apical process more or less deeply furcate, the middle prong 
onleftside withacutetip. . . . . . . . .. . . E. TrRIPLEX, Walker, s. str. 
27. Body with cyaneoustinge . . . . . . . . . . . E. PiLosiFoRMis, Bezzi. 
Body black, without metallic lustre . . . darc doce qp deese 28. 
28. Mesonotal pile grayish in front; in specimens identified as 
this species the right valve of pygidium is tipped with a 
pencil of black sete . . . e. 5. 5 5. . o. E.swrrur Wheeler & Melander. 
Mesonotal pile brownish to black. Mus det hon à DOR MS IPLE rcp 29. 
29. Hind femora and tibize brown; in specimens identified as 
this species the hairs of the hind femora are dense and 
CÓNISS. . . . . 2. € . os 54). 520 Be BAERREW BBIUE A MDUEDUNC 
Hind tibiz and femora black ( yucatanus included here but 
in absence of type its location can not be more E 
given). . . $m Lue V cuia D M (o AGRO TN n NE 
3o. Veins thin, first DUAE cell peque as od as ssiind: : 
pygidial hairs short and sparse, middle prong of left or 
lower valve shifted apical to terminal one and ribbon-like, 
end-process of right valve very large and leaflike. . . E. LEPTONEURa, nov. sp. (3). 
(1) Euhybos gryphus, nov. sp. — Male. Length 4.5 mm. Black, tarsi yellowish, wings infumated, especially 
at base, no stigma. Third antennal joint conical, a little more than twice as long as wide, arista two and one-half times 
antennal length; occiput brownish cinereous, Notal hairs black, two pairs of scutellars, pollen above wings brown. Hairs 
of first segment of abdomen whitish, of remainder black or piceous; right valve of pygidium dusted with brownish, its apical 
half formed as a strong wide beak, its basal half quadrate when viewed from above, the inner distal angle bearing a strong 
spur directed to the left; left valve stout, its middle process located at the tip and rather small and acute, its articulate 
terminal process swollen near the base and thence curved and talon-like. Knees brownish, hind femora robust, slightly 
shorter than tibia and metatarsus together ; femoral hairs black, eight stout, spinous bristles arising from low tubercles along 
lower posterior face, two along middle of this face, one extensor toward knee, two along middle of anterior face and two 
full irregular rows at lowermost anterior face, spine on hind trochanters strong. The dark color of base of wings extends 
as far as apex of anal cell, not sharply distinguished from the scarcely lighter apical portion, fourth vein deeply bent at 
posterior crossvein, sections of fifth vein 5 : 1. 
Holotype, Tabernilla, Canal Zone, Panama, 20 June, 1907, August Busck, collector, in U. S. National Museum. 
(2) Euhybos triplex, var. simplex, nov. var, — Male. Differs from the familiar and widely distributed triplex 
Walker in the formation of the pygidium, whose left valve ends in a long, curved, pointed, simple, articulate process at the 
base of which the valve projects obliquely backward as a strong pointed prong. In frilex the terminal process is forked, 
the two parts either equal or the one to the left smaller. "The variety símplex represents that stage where the left furcation 
has disappeared. Normally in triplex the robust prong at the end of the left valve is more transversely directed. 
Type : Greenfield, Massachusetts, June r, rg14. Additional specimens from Lyndon, Vermont, Long Island, 
New York, Chester Co., Pennsylvania, Central Illinois, and Austin, Texas. 
(3| Euhybos leptoneura, nov. sp. — Male. Length 4 mm. Black, tibiae castaneous, base of tarsi yellowish, 
wings hyaline, brownish at base, Third antennal joint subulate, twice as long as wide, arista two and one-half times 
antennal length ; occipital pollen fulvous, Notal hairs yellow, one pair scutellars, pollen at edge of notum brown, | Abdo- 
minal hairs golden, base of pygidium globular and lightly dusted with brown, its hairs short and sparse, the right valve 
deeply emarginate at end above and continued as a large forked leaf-like process, the left valve ending above in an articulate 
conical process with deflexed tip. Sides of front tibi ciliate, middle tibiae with six extensor bristles, hind femora rather 
slender, hairs brown, underside with five very small thorn-bearing tubercles close to knee and with a small transverse ridge 
opposite apical fifth of tibizs, anterior face with two bristles near knee, one extensor, two on posterior face near apical third, 
