1()4 
posterior tarsi slightly infiiscated ; veins and stigma light brown; eosta 
yellowish. 
One female. New Hampshire. (Coll. Am. Bnt. Soc.) 
19. Pachynematns abdominalis new species. 
Female. — Length, 6.5 mm. ; robust, shining; head obscured by dense 
punctuation; clypeus nearly truncate, scarcely emarginate; ocellar 
basin indistinctly defined, lateral walls almost obsolete; frontal crest 
low; fovea oval antenna' 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; clypeus whitish; pronotum, tegulae, and legs reddish yellow; 
tarsi brown: spot on either side of tergum, extending over segments 
2 to o. reddish yellow: venter of abdomen with yellowish central stripe 
and more or less yellow toward tip: tips of posterior tibia* and the pos- 
terior tarsi infuscated; wings smoky; veins, including stigma, brown. 
One female. Skokomish River, Washington, May 11. 1892, Trevor 
Kincaid, collector. (Coll. Cornell Univ. 
20. Pachynematus hoodii new species. 
Female, — Length 6.5 mm.; very slant, robust; clypeus shallowlyand 
broadly emarginate: frontal crest strongly developed, unbroken : anten- 
na! fovea circular; antennae long, slender, joints.' I and I 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: labium, bases of mandibles, palpi, angles of pronotum, 
tegulse, venter of abdomen, terminal (basal segment, and the legs light 
yellowish; extreme bases of coxa- and the sheath dark brown, almost 
black: hind tarsi dark brown: wings slightly infuscated, almost hyaline; 
veins, including stigma and eosta, dark brown. 
Male. — Length 5 mm.; head narrowing back of compound eyes; 
antennae very large and long, compressed; procidentia narrow, not 
strongly produced, rounded at apex. Color as in female, except that 
the light areas are inclined to yellowish brown, with the venter of the 
abdomen decidedly brownish. 
One female and five males. Mount Hood, Oregon, and Washington. 
(Coll. Am. Knt. Soc.) 
21. Pachynematus corniger Norton. 
1861. Nematus corniger Norton. Proc. Boat. Soc. Nat. Hist., vin. p. 159. 
1867. Nematus corniger Norton. Trans. Am. Knt. Soc. I, p. 199. (Cat., etc., p. 61.) 
187s. Nematus corniger Provancher. Nat. Can., i, p. 55. 
1883. Nematus cot niger Provancher. Faun. Ent. Can. Hym., p. 184 
Female. — Length C> to 7 mm.: moderately robust ; clypeus shallowly 
incised, approaching truncate; vertex finely tnberculate; lateral walls 
