94 
INDEX TO SPECIES OF PACHYNEMATUS—continued. 
minutus mn. 8p; f\->--=---<+-----2----.102 | punctulatus n.sp.-9 -26- 225 eeeepeen- 18 
MONPLVAOUS MSP: Ques eesee ease a eeee 12)} robustusm, Sp. -Oe---e.e eee eee 14 
NEVAdensismMaSpeaGieoseae ee ease eee = Jo) eRULehis! Cresson) 9 2a--- eee eeseeee 27 
nigropectus Cresson 9 -....----.----- 17 | suadus Cresson 9 -..-1-- 22 -eaeee 7 
occidentalismmusps quese--) === ease 99 | isubalbatus: Norton ¢) Q 2222-222. 42 22 
ocreatus Harrington 9 -.....--..--.-- 3 thoracicus n. BP diss =. aee ee seers eee 27 
palliventris Cresson 9 -.-.----..----- 23 | WPBUAKE HM Uonne) eoee Bade SaaS Seonidoo. se 24 
plearicus; Norton /Oi) -5--- ec cece 10 | wrangeli n. sp. f'-.-.---------+--+-- Bi 
— OWUSECeMI IN, Bids DY ossesocosoeso sss5cc JUL | 
1. Pachynematus dimmockii Cresson. 
1880. Nematus dimmockii Cresson. Trans. Am. Ent. Soc., VIII, p. 6. 
Female.-—Length 8 inm.; exp. al. 18 mm.; rather robust, elongate, 
shining; clypeus deeply emarginate, lobes triangular, rounded, and with 
labrum clothed with long hairs; frontal crest and lateral walls of ocel- 
lar basin distinctly but not strongly elevated, former slightly broken at 
middle; antennal fovea shallow, indistinct; antennie slender, as long as 
head and thorax, fourth joint much longer than third: second recurrent 
vein interstitial with second transverse cubital; cuter veins of discal 
cells of hind wings interstitial; stigma rather broad, ovate or some- 
what tapering; sheath very long, rounded at apex, projecting free one- 
half its length, blades thin and closely applied; cerci long, very slen. 
der, filiform; inner tooth of claw near apex rather broad. Color brown- 
ish black; abdomen lighter, inclined to fulvous; face below antenne, 
upper and posterior orbits, pronotum, tegule, and legs except bases of 
coxie, reddish yellow, strongly infuscated, particularly posterior tibive 
and all the tarsi; veins, including stigma, dark brown. 
One female, Cresson’s type. Collected by Mr. George Dimmock near 
the summit of Mount Washington, New Hampshire. (Coll. Am. Ent. 
Soc.) 
2. Pachynematus ruralis Cresson. 
1880. Nematus ruralis Cresson. Trans. Am. Ent. Soc., VI, p. 5. 
Female.—Length 8 mm.; head strongly developed back of compound 
eyes; clypeus angularly incised, lobes broad and rounded; ridges 
about anterior ocellus wanting; pentagonal area smooth, not depressed ; 
antennal fovea sharply defined anteriorly; antenne short, slender, 
joints 4 and 5 subequal and slightly longer than 3; intercostal vein 
nearly interstitial with basal; second cubital and second recurrent 
interstitial or nearly so, as also the outer veins of discal cells of hind 
wings; Sheath very prominent, elongate, projecting free one-half its 
length, regularly tapering on both margins to rounded apex, blades 
thin, closely applied; cerci very slender, filiform; inner tooth of claw 
very minute. Color brownish black; orbits except narrow inner mar- 
gins, face below base of antennie, pronotum, tegule, abdomen beneath, 
