69 
fulvous beneath and toward tip, somewhat infuscated above; poste- 
rior tibie and tarsi infuscated; wings hyaline; stigma and costa pale. 
Two females. Nevada and California. (Coll. Am. Ent. Soc.) 
What is possibly the male of this species is described from speci- 
mens received from Mr. H. G. Dyar, labeled “S. F.3H.” Cresson’s dor- 
sivittatus can not be distinguished from this species from the deserip- 
tion, and seems synonymous with it. The type of vertebratus is lost. 
According to Mr. H. G. Dyar, who describes the egg and the larval 
stages from specimens collected at Plattsburg, N. Y., this species is a 
solitary edge feeder on poplar. 
38. Pteronus integer Say. 
1836. Nematus integer Say. Bost. Journ. Nat. Hist., 1, p. 218. 
1859. Nematus integer Leconte. Say Ent., 11, p. 679. 
1861. Nematus integer Norton. Proc. Bost. Soc. Nat. Hist., viii, p. 158. 
1867. Nematus integer Norton. Trans. Am. Ent. Soc., 1, p. 216. (Cat., ete., p. 78.) 
1883. Nematus integer Packard. Rept. U.S. Ent., pp. 149-150. 
1890. Nematus integer Packard. Rept. U. 8S. Ent. Comm., v, pp. 838-840. 
Female.—Length 6 to 6.5 mm.; robust, shining; clypeus circularly 
emarginate, lobes small, rounded; ocellar basin distinctly limited; 
frontal crest large, slightly broken at middle; antennal fovea expand- 
ing basally; antennie very long, slender, distinctly tapering; stigma 
not very broad; venation normal; cerci robust, tapering; sheath rather 
narrow, slightly concave above, rounded at apex; claws not very deeply 
notched, inner ray distinctly shorter than outer. Color of spot on head, 
including ocelli and extending to bases of antennie, center of anterior 
lobes of mesonotum, metanotum, and central portion of abdomen dor- 
sally brownish black; antenne dark brown, reddish beneath and apie- 
ally; tibie and tarsi slightly infuscated; sheath narrowly tipped with 
brown; body otherwise’ pallid; veins, including costa, light yellowish 
brown; stigma yellowish hyaline. 
Two females. Colorado and New Jersey. (Coll. Am. Ent. Soc.) 
—39. Pteronus mendicus Walsh. — 
1866. Nematus mendicus Walsh. Proc. Ent. Soc. Phila., v1, p. 261. 
1867. Nematus trivittatus Norton. Trans. Am. Ent. Soc., 1, p. 218. (Cat., etce., 
p- 80.) 
1867. Nematus mendicus Norton. Trans. Am. Ent. Soe., 1, p. 220. (Cat., ete., 
p. 82.) 
1878. Nematus mendicus Provancher. Nat. Can. x, p. 58. 
1883. Nematus mendicus Provaneher. Faun. Ent. Can. Hym., p. 191. 
1895. Nematus mendicus Dyar. Trans. Am. Ent. Soc., xxu, p. 302. 
Female.—Length 5 to 6 mm.; not very robust, shining; clypeus 
broadly but not deeply notched, lobes rounded; ocellar basin with dis- 
tinetly defined but rounded lateral walls; frontal crest prominent, 
broken at middle, or strongly bituberculate; antennal fovea broad, 
shallow; antenne longer than head and thorax, very slender, tapering, 
