AMERICAN HYMENOPTERA. 259 



pressions about ocelli as in S. vifis, the lower one very distinct ; be- 

 tween this and antennae is a deep, recurved cross channel almost ex- 

 tending to eyes; nasus wide, its edge straight, tips of mandibles sharp, 

 its inner tooth retracted; tegulas, collar and legs straw-yellow; inner 

 claw tooth small, near the base; abdomen compressed; wings faintly 

 clouded, marginal cross nervure curved, and touching the third sub- 

 marginal beyond the middle ; first submarginal rounded at base. 



Connecticut, New York, New Jersey. 



Common. By an error this was originally placed in Tribe 2 of Sec- 

 tion 3. 



26. Selandria ruficollis, n. sp. 



Black; the tegulas, prothorax and niesotliorax rufous; wings fuliginous. 

 Length 0.24—0.28. Br. wings 0.50—0.56 inch. 



% . Not very stout, compressed, apex of abdomen rounded ; first and 

 second joint of antenna? cup-shaped, remainder enlarged in middle; 

 the third joint long; head polished, lower ocellus in a basin ; nasus 

 hardly emarginate ; mouth black, palpi piceous ; tegulfe, prothorax, 

 mesothorax and scutel rufous, the lower half of prothorax black; legs 

 black, the anterior femora and tibia? yellow ; base of femora and apex 

 of tibia? black; apical half of medial femora and tibise obscure reddish. 

 Wings blackish subhyaline. 



Var. Venter at base pale, legs black, trochanters pale, base of first 

 joint of tarsi white. 



Mexico. (2 % .) Saussure. 



Species not Jcnoion. 



27. S. obtusa. 



Tenthredo (All) obtusa, Klug, Berl. Mag. viii, 1814, 55, 20, Tr. II, A. f. 

 "Body black fuscous; clypeus, collar, base of abdomen, legs before, and pos- 

 terior tibiee testaceous, wings hyaline, stigma yellowish. Length 4 lines. Exp. 

 wings 8^ lines. 



The abdomen thickens itself obtusely. Antennae of equal thickness 

 throughout. The anterior part of body is light pubescent whitish; 

 mandibles black, inner part of mouth yellowish. The back plates of 

 metathorax are white; upon the abdomen the first and second segments 

 are dirty white-yellow, the portions of the anus beneath are of the same 

 color; on the middle legs the under side of the shanks are brownish : 

 on the under legs the shanks, spurs of tibia? and tarsi are blackish ; 

 wings hyaline, with brown nerves, yellow costa and reddish outer 

 nerves; the second submarginal receives two recurrent nerves, of 

 which the second enters close to the third, wing scales yellow." 



Georgia. 



