104 
posterior tarsi slightly infuscated; veins and stigma light brown; costa 
yellowish. 
One female. New Hampshire. (Coll. Am, Ent. Soc.) 
19. Pachynematus abdominalis new species. 
Femate.—Length, 6.5 mm.; robust, shining; head obseured by dense 
punctuation; elypeus nearly truncate, scarcely emarginate; ocellar 
basin indistinctly defined, lateral walls almost obsolete; frontal crest 
low; fovea oval (antennie wanting); sheath short, obliquely truncate 
at apex; stigma regularly rounded beneath, not very broad; venation 
normal; claw with large, prominent inner tooth near apex. Color 
black; elypeus whitish; pronotum, tegule, and legs reddish yellow; 
tarsi brown; spot on either side of tergum, extending over segments 
2 to 5, reddish yellow; venter of abdomen with yellowish central stripe 
and more or less yellow toward tip; tips of posterior tibize and the pos- 
terior tarsi infuscated; wings smoky; veins, including stigma, brown. 
One female. Skokomish River, Washington, May 14, 1892, Trevor 
Kineaid, collector. (Coli. Cornell Univ.) 
20. Pachynematus hoodii new species. 
Female.—Length 6.5 mm.; very short, robust; clypeus shallowly and 
broadly emarginate; frontal crest strongly developed, unbroken; anten- 
nal fovea circular; antennie long, slender, joints 3 and 4 subequal; vena- 
tion normal; stigma broad, evenly rounded; sheath broad, obliquely-trun- 
cate at apex; cerci rather robust; claw with minute inner tooth. Color 
black, shining; labrum, bases of mandibles, palpi, angles of pronotum, 
tegule, venter of abdomen, terminal dorsal segment, and the legs light 
yellowish; extreme bases of coxze and the sheath dark brown, almost 
black; hind tarsi dark brown; wings slightly infuseated, almost hyaline; 
veins, including stigma and costa, dark brown. 
Male.—Length 5 mm.; head narrowing back of compound eyes; 
antenne very large and long, compressed; procidentia narrow, not 
strongly produced, rounded at apex. Color as in female, except that 
the light areas are inciined to yellowish brown, with the venter of the 
abdomen decidedly brownish. 
One female and five males. Mount Hood, Oregon, and Washington. 
(Coll. Am. Ent. Soc.) 
21. Pachynematus corniger Norton. 
1861. Nematus corniger Norton. Proc. Bost. Soc. Nat. Hist., vit, p. 159. 
1867. Nematus corniger Norton. Trans. Am. Ent. Soc.,1,p.199. (Cat., ete., p. 61.) 
1878. Nematus corniger Provancher. Nat. Can., I, p. 55. 
1883. Nematus corniger Provancher. Faun. Ent. Can. Hym., p. 184 
Female.—Length 6 to 7 mm.; moderately robust; elypeus shallowly 
incised, approaching truncate; vertex finely tuberculate; lateral walls 
