AMERICAN HYMENOPTERA. 205 



transform, for out of fifty galls all but three were bored, and in those, 

 when opened, larvfB which had perished when immature were found." 



Hock Island, 111. 



Two S , three 9 . April 27 — June 9. This is apparently the same 

 with a species from Connecticut and Illinois previously named by me 

 A^. Ivjirimnn but the description not published. 



22. N. brunneus. 



XematuH brunneus, Norton, Proc. Ent. Soc. Phil, iv, 1864, 8, 10, 9- 



Head and thorax brown; abdomen and legs yellowish, wings hyaline. 

 Long 0.26. Br. wings 0.62 inch. 



9 . Color ochre-brown ; antenna? black, about half the lenirth of bo- 

 dy, second joint a little longer than fourth ; a sort of W-shaped depres- 

 sion above ocelli ; lower ocellus in a flat, distinctly enclosed, obovate 

 space, separated from the groove on ridge between antenna;, which is 

 slender ; nasus incurved, edge of labrum almost S(juare ; head and tho- 

 rax dark ochre brown 5 mouth, tegula?, anterior angle, basal plates, ab- 

 domen and most part of legs yellowish; tips of posterior tibi;ie and 

 their tarsi fuscous; wings faintly smoky ; stigma and costa pale ; se- 

 cond submarginal with two angles beneath. 



Rocky Mountains, Colorado, (Coll. Am- Ent. Soc.) One specimen. 



2-'!. Nematus rufo-fasciatus, n. sp. 



Bhxck ; a band on middle of abdomen and most part of legs rufous; wings 

 smoky-hyaline. Length 0.34. Br. wings 0.70 inch. 



9- Black; body long and moderately stout; antennae about two- 

 thirds the length of body, slender, cylindrical, third joint but little 

 longer than fourth; head dull, with coarse, confluent punctures; nasus 

 coarsely punctured, deeply channelled across the middle, angulate, 

 emarginate; edge of labrum incurved; outer orbit and a spot opposite 

 ocelli on each side, labrum and palpi rufous ; upper half of anterior 

 angle and basin on each side of scutel ruRms ; abdomen, except the 

 basal plates and three apical segments, chestnut-red; legs the same co- 

 lor; coxa3, except at tip, black; anterior inner tibial spur stout, appa- 

 rently bitid ; inner claw tooth large. Wings smoky-hyaline, uervures 

 piceous, stigma and costa pale. 



Mackenzie River, Hudson's Bay Territory, (R. Kennicott). 



24. N. erythrogaster. 



Nematus erythrogastcr, Norton, Proc. Ent. Soc. Phil, iii, 1804, S, 12, 9- 

 Blaek ; the collar and abdomen, except at base, rufous; wings hyaline. 

 Length 0.28. Br. wings 0.60 inch. 



9 . Body moderately stout; antennas more than half the length of 

 body, slender, joints not enlarged at tips, third longer than fourth ; 

 liead rugose, with a trilobate basin, enclosing ocelli; nasus moderately 



