109 
29. Pachynematus occidentalis new species. 
Male. — Length 6 mm. ; rather slender, elongate; head slightly narrow- 
ing back of compound eyes; clypens broadly and shallowly eniarginate; 
antennae short, stont, strongly compressed; crest rounded, unbroken; 
fovea deep, oblong, somewbat constricted medially; procidentia broad, 
rounded; venation normal, except that the third cubital cell is quite 
elongate, the sides but slightly divaricating; stigma robust; autenme 
very broad, flattened, and not much longer than head and thorax. 
Color black, shining; extreme apex of clypeus, labrum, part of angles 
of pronotum, teguhe, and legs light reddish brown; coxa*, except 
extreme tips, black; tips of posterior tarsi brownish; wings slightly 
infuscated; veins and stigma dark brown. 
Two males. Washington. (Coll. Am. Ent. Soc.) 
30. Pachynematus carolinensis new species. 
Male. — Length 5 mm.; head much narrowed back of compound eyes; 
clypeus broadly, circularly eniarginate, lobes triangular; ocellar basin 
with distinctly defined limiting ridges; frontal crest strong, unbroken; 
fovea oval, shallow; antenna' elongate, tapering, slightly compressed 
basally; procidentia narrow, i>roduced, truncate at apex; third cubital 
cell very short, quadrate; outer cross veins of discal cells of hind wings 
interstitial; stigma regularly rounded on lower margin. Color black; 
orbits, face beneath antenna 4 , mouth parts, pronotum, teguhe, large 
spot on upper half of mesepimera, venter, and legs yellowish resinous; 
posterior tarsi slightly iufuscated; wings hyaline; veins, including 
stigma, brown. 
Three males. Xorth Carolina. (Coll. Am. Ent. Soc.) 
31. Pachynematus wrangeli new species. 
Male. — Length G mm. ; rather slender; head distinctly narrowed back 
of compound eyes; clypeus rather deeply incised, lobes medium, 
rounded at apices; vertex shining; walls about ocellar basin distinctly 
but not strongly raised,, rounded; frontal crest slightly broken; anten- 
nal fovea very distinct, clearly defined, circular ; antenna' long, tapering, 
slightly compressed basally, fourth joint distinctly longer than third ; 
upper discal cell of hind wings very slightly exceeding lower; prociden- 
tia scarcely projecting, nearly squarely truncate at apex, slightly con- 
stricted basally; hypopygium distinctly notched at tip; inner tooth of 
claw large, remote from apex. Color black, shining; triangular spot 
beneath antenna^, lower orbits, mouth parts, angles of pronotum, teguhe, 
coxai, trochanters, all of anterior legs, more or less of underside of pos- 
terior femora, and the venter yellowish white, more or less infuscated, 
giving a grayish aspect to the lighter-colored parts; veins, stigma, and 
costa to base dark brown. 
