L893.] NATURAL SCIENCES OF PHILADELPHIA. 497 



and thorax united, setaceous, the first joint of flagellum but little 

 shorter than the second, dorsulum compactly punctured ; scutellum 

 impressed ; metathorax above rugose; or coarsely rugoso- granulated, 

 deeply and widely furrowed down the middle, meta pleurae and pos- 

 terior face granulated, the posterior face with a prominent, trans- 

 verse ridge near the top ; legs tolerably spinose ; abdomen finely 

 and closely punctured throughout, the last dorsal segment not keeled. 

 Black ; second abdominal segment red; tarsi obscurely testaceous ; 

 wings dark fuscous, iridescent; marginal cell truncate ; head, thorax 

 and abdomen without pubescence or pile. Length 10-14 mm. 



Var. Abdomen entirely black, more or less with silvery pile. 



Montana; New Mexico (Coll. Ashmead). The longer antenna? 

 will distinguish this species from the male of divisa and consimilis to 

 which it is related. 



11. — Ancistromma vegeta n. sp. 



9 . — Anterior margin of clypeus subtruncate, slightly emarginate 

 medially, and indistinctly dentate laterally ; front with fine even 

 punctures, becoming sparse medially ; vertex punctured somewhat 

 similarly to the sides of the front; space between the eyes at top, if 

 anything, greater than the length of autennal points 2-4 united ; an- 

 tennae very short, when stretched out about equal to the head and that 

 part of thorax preceding the hind margin of teguhe, not setaceous, 

 the first joint of the fiagellum in length about equal to the second ; 

 dorsulum with tolerably fine, distinct punctures, which are somewhat 

 sparse medially ; scutellum impressed; metathorax delicately and in- 

 distinctly striated, more strongly soon metapleurse and posterior face, 

 the upper surface distinctly, but not very strongly furrowed down the 

 middle ; legs strongly spinose ; pygidial area strongly and sparsely 

 punctured, one- half again longer than it is broad at base. Black ; 

 apical joints of tarsi testaceous ; wings dark fuscous, iridescent; 

 marginal cell obliquely truncate ; head, thorax and abdomen, with- 

 out pubescence. Length 15 mm. 



$ . — Anterior margin of clypeus rounded-out, slightly emarginate 

 medially ; front and vertex with tolerably strong, separated punc- 

 tures ; space between eyes at top greater by far than the length of 

 autennal joints 2-4 united ; antenna? about as long or a little longer 

 than in the 9 > the first joiut of the flagellum about one-quarter 

 shorter than the second ; legs tolerably spinose ; abdomen very finely 



