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31. Pteronus odoratus Dyar. 
1894. Nematus salicis odoratus Dyar. Can. Ent v xxvi, p. 187. 
Female. — Length 5.5 mm.; short, robust, shining; head nearly spherical 
viewed laterally; clypeus rather narrowly and deeply emarginate; 
ocellar basin distinctly defined, sides acute, finely raised; frontal crest 
broad, somewhat broken at middle; antennal fovea broad, circular, shal- 
low; antenna 1 longer than head and thorax, not very robust, tapering, 
joints 3 and 4 subequal; venation normal; stigma broadest at base, 
tapering regularly and acuminately to apex; sheath narrow, rounded 
at apex; cerci very short, robust; claws not deeply notched, rays sub- 
equal. Color of antennae, spot on vertex including ocelli extending 
back over occiput, mcsonotum, metanotum, abdomen dorsally except 
narrow lateral margin and apex, and apex of sheath black; scutellum 
basally and sutures of mesothorax inclined to reddish; posterior tibia 1 
and their tarsi slightly infuscated; antenna' inclined to ferruginous 
toward tip, especially beneath; entire venter and otherwise except as 
noted pallid; veins and stigma except extreme base of costa dark 
brown. 
Male. — Length 5 mm. ; moderately robust, shining; clypeus projecting, 
notch a complete semicircle, lobes long, rounded; ocellar basin distinctly 
defined; frontal crest not, or very slightly, notched; antennal fovea 
large, circular, deeply excavated; antennae very robust, flattened, taper- 
ing, joints 3 and 4 subequal; venation normal, except that the third 
cubital cell is nearly quadrangular; stigma elongate, regularly rounded 
on lower margin; procidentia short, narrow, rounded at apex; hypo- 
pygiuin liexed so as to appear strongly notched at apex; claws minutely 
notched, rays subequal. Color of antenna 1 , head above, frontal crest 
extending over occiput, mesonotum, metanotum, and abdomen except 
narrow lateral margin black; face, mouth parts, orbits, lateral dorsal 
margin of abdomen above, and entire venter light yellowish; posterior 
tibiae, particularly at apex, and their tarsi strongly infuscated; nagelluin 
rufous beneath; veins, including stigma and costa, the latter to base, 
dark brown. 
This well-marked species seems to be the one characterized by Dyar 
(1. c), who also describes the eggs and larval stages. The eggs and 
larvae were found at Woods Hole, Mass., on willow. 
Seven females, one collected in August in Maine (Coll. Am. Ent. Soc), 
three from Michigan, and three from Ithaca, N. Y. (Coll. Cornell Univ.). 
The male is characterized from a specimen (Coll. Am. Ent. Soc.) without 
locality label, evidently one of Walsh's judging from the pinning, and 
probably collected in Illinois. 
32. Pteronus cornelli new species. 
Female. — Length 7 mm.; moderately robust, shining; clypeus broadly, 
circularly emarginate, lobes rounded, not broad; ocellar basin deeply 
13449— No. 3 5 
