102 
Wings hyaline, or nearly so; veins light brown; stigma and costa pale, 
néarly hyaline. 
One female. Colorado. C. P. Gillette, collector. (Coll. U.S. Nat. 
Mus.) 
14. Pachynematus robustus lew species. 
Female.—Length 6 mm.; short, very stout; head dilated back of 
éyes; clypeus rather shallowly but distinetly emarginate; frontal crest 
well defined, unbroken; antennal fovea circular, deep; head very 
coarsely and rugosely punctured; antennie very slender, elongate, 
joints 3 and 4 subequal; intercostal more than twice its length anterior 
to basal vein; second recurrent interstitial or nearly so with second 
cubital, venation otherwise normal; stigma large, widest near base; 
Sheath robust, slightly acuminate toward apex; cerci long, filiform. 
Color black; labrum, angles of pronotum, tegul«, more or less of the 
ventral segments of abdomen, the apex of the last dorsal segment, and 
legs for the most part light yellowish brown; coxie basally strongly 
infuscated; femora, apices of tibize, and the tarsi dark brown; wings 
hyaline; veins and stigma brown; costa yellowish. 
One female. Montana. (Coll. Am. Ent. Soc.) 
15. Pachynematus clypeatus new species. 
Female.—Length 6.5 nm.; somewhat elongate, shining; head rather 
coarsely punctured, widening noticeably back of compound eyes; 
clypeus not very deeply emarginate, lobes short, rounded; pentagonal 
area (distinctly defined, walls not very sharply raised; fovea shallow; 
crest low, unbroken; antennie rather slender, fourth joint a little longer 
than third; sheath tapering, somewhat obliquely truncate toward tip; 
venation normal, except that the second recurrent is interstitial with 
second cubital; stigma broad, rounded on lower margin; claws with 
minute inner tooth. Color black; small spot beneath bases of antennee, 
tips of elypeus, labrum and other mouth parts, outer half of pronotum, 
tegulie, legs, and venter of abdomen yellowish; posterior margins of 
dorsal segments, especially basal ones, pale, together with all of the 
terminal segment; bases of coxie, extreme tips of posterior tibize, and 
the posterior tarsi brown; bases of femora slightly infusecated; sheath 
brown; wings nearly hyaline; veins and stigma light brownish; pos- 
terior orbits reddish, strongly infuseated. 
Two temales. Montana. (Coll. U. S. Nat. Mus.) 
16. Pachynematus ater McGillivray. 
1893. Messa atra McGillivray. Can. Ent., xxv, p. 238. 
Female.—Length 6 mm.; robust, shining, somewhat duller on head 
from rather dense punctuation; head dilated back of eyes; elypeus very 
broadly and shallowly notched; ocellar basin distinetly limited, walls 
