131 
15. Nematus inconspicuus Kirby. 
1882. Nematus inconspicuus Kirby. List Hym. Brit. Mus., i, p. 141. 
Exp. al. 8 lin. ; long, corp. 4 lin. 
Female. — Head, antennae, thorax, and pectus black; mouth and prothorax yellow- 
ish; abdomen black above and testaceous beneath, with a narrow border on the 
sides and at the back of each segment; legs testaceous; Wings hyaline; costa yel- 
lowish; three submarginal cells. 
New York. 
1G. Nematus longicornis Eschscholtz. 
1822. Nematus longicornis Eschscholtz. Entomogr., p. 98. 
1823. Nematus longicornis Eschscholtz. Nat. Abb. Dorp., i, p. 149. 
1867. Nematus longicornis'Sorton. Trans. Am. Ent. Soc, I, p. 202. (Cat., etc., p. 64.) 
Black, with the margin of tergum fuscous ; the venter and legs pale, posterior 
femora black, costa of wings pale, stigma brown, head black, labrum yellowish, 
eyes clear gray ; length 21 lines ; antennae longer than the moiety of body, setaceous, 
black; corselet black, its anterior border forming a yellowish collar; abdomen wide, 
flat ; back brownish ; lateral margins of a clear yellow ; venter yellow ; wings longer 
than the body, narrow, transparent ; costa yellow ; stigma and nervures brown ; three 
discoidal cells; legs yellow,* posterior femora black-brown in the middle. 
Isle of Unalaska, Russian America. 
17. Nematus neglectus Kirby. 
1882. Nematus neglectus Kirby. List Hym. Brit. Mus., i, p. 147. 
Exp. al. 8 lin. ; long. corp. 4 lin. 
Female. — Head and thorax black; mouth and prothorax pale; a more or less com- 
plete testaceous ring around the eyes; sides of pectus sometimes w r ith a dull rufous 
spot; abdomen testaceous, first two segments black at base above; legs testaceous; 
front femora black at base ; middle femora and hind legs black; hind tibi;e rufous 
beneath; wings hyaline, male with three and female with four submarginal cells; 
stigma yellowish. 
Hudson Bay, St. Martin's Falls. 
18. Nematus obscurus Xorton. 
1861. Nematus obscurus Norton. Proc. Bost. Soc. Nat. Hist., vm, p. 160. 
1867. Nematus obscurus Norton. Trans. Am. Ent. Soc, i, p. 203. (Cat., etc., p. 65. "> 
Dull black; teguhe, base of abdomen, and knees indistinctly ferruginous; length 
0.25; br. wings 0.58 inch. 
Female. — Black, pubescent; third joint of antennae a little longer than fourth; 
clypeuscrenate; labrum brownish red, shining; mandibles rufous at tip ; palpi pale; 
a longitudinal groove upon scutelluin; basal membrane, sides of tergum, knees, and 
front of tibia? indistinctly ferruginous; abdomen stout; wings faintly clouded; 
stigma dull fuscous; costa black. 
Massachusetts. 
19. Nematus obtusus Kirby. 
1822. Nematus crassus Eschscholtz. Entomogr., p. 213. 
1823. Nematus crassus Eschscholtz. Naturw. Abh. Dorp., I, p. 149. 
1867. Nematus crassus Norton. Trans. Am. Ent. Soc, i, p. 213. (Cat., etc., p. 75.) 
1882. Nematus obtusus Kirby. List Hym. Brit. Mus., i, p. 148. 
Black; sides of the head, lines on the thorax, scutellum, and pleura chestnut; 
tibwne pale; length 4 lines. 
Body thick; head black in the middle, of a nut brown on the sides; parts of the 
