150 E. T. CRESSON. 



punctured and shining; first segment gradually, not broadly dilated at tip 

 which is finely longitudinally aciculated; gastrocoeli snaall and deep. Length 

 .40 inch. 



Hah. — Can., Mass. DiiFers from suhcyanevs by the more slender 

 form, by the black and more closely and finely punctured abdomen, 

 and by the narrower and finely aciculated postpetiole. 



38. bimembris, Prov. Nat. Can. ix, p. 8, 9 . 



Hah. — Canada. A medium sized, robust, dull black species, with 

 no pale markings on body except the scutellum and two spots at 

 apex of abdomen ; the antennae have each a brotid yellowish-white 

 annulus, and the wings are uniformly pale yellowish-fuscous. Length 

 9 .50 inch. 



39. truculentus, n. sp. 



9. — Opaque black, strongly and confluently punctured; upper anterior 

 orbits, annulus on antennse, short line before and one beneath tegulse, scu- 

 tellum entirely and large spot on disc of three apical segments of abdomen, 

 white; antennse robust, strongly involute, third joint scarcely twice longer 

 than broad, and longer than the fourth which is nearly square; cheeks con- 

 fluently punctured and flattened; scutellum broad, flat, sparsely punctured, 

 rapidly narrowed to tip which is truncate; metathorax deeply excavated be- 

 hind, central area long, subquadrate; wings uniformly yellowish-fuliginous; 

 legs robust, tarsi rufo- fuscous, four anterior tibise tinged with brown, the an- 

 terior pair and tips of femora pale rufo-fuscous in front, posterior coxse nude 

 beneath and strongly punctured; abdomen closely and strongly punctured on 

 segments two and three, confluently soon middle and base of third segment, 

 apical segments gradually less strongly punctured ; first segment broadly dilated 

 at tip and longitudinally aciculated; gastrocoeli rather large and very deep. 

 Length .45 inch. 



Hah. — White Mts., N. H., (Austin). Stouter and more coarsely 

 sculptured than brevicinctor which it somewhat resembles. 



40. brevicinctor, Say, Am. Ent. pi. 22. 



Hah. — Can., iMass., N. J., Del., Md., Col. A small, slender, dull 

 black species with pale annulus on antennae, white scutellum and two 

 white spots at apex of abdomen ; wings subhyaline. Closely allied to 

 extrematatis which has the basal joint of posterior trochanters white; 

 in this species it is black. Length .35 — .50 inch. 



41. extrematatis, Cress. Proc. Ent. Soc. Phil, iii, p. 149, 9 . 



PhyyaJeuon niger, Prov. Nat. Can. vi, p. 280, 9 . 

 Hah. — Can., N. H., Mass., 111., La. A small dull black species, 

 with annulus on antennas, scutellum, hasal joint of posterior trochan- 

 ters, and spot at tip of abdomen, white ; wings smoky ; coxal scopa 9 

 distinct. Length % 9 .38 — .48 inch. 



