1893.] NATURAL SCIENCES OF PHILADELPHIA. 495 



than in the 9 , the metapleurse and posterior face coarsely granulated; 



colored like the 9 ; front, face, clypeus, and thorax more or less, 

 with silvery pubescence ; abdomen with silvery pile, not distinctly 

 punctured. Length 8-11 mm. 



Montana; Kansas. A specimen from San Diego, California, 

 which I take to be simply a variety, has the abdomen entirely red 

 and its sculpture a little finer. 



8. — Ancistromma divisa 1'att. 

 Larra divisa Patt., Bull. U. S. Geol. Survey, V, p. 368. 9 . 1879. 



9 • — Anterior margin of clypeus rounded-out, bidentate laterally; 

 front rather coarsely and closely punctured, more sparsely so medial- 

 ly ; vertex more distinctly punctured than the sides of the front ; 

 space between the eyes at top about equal to the length of antennal 

 joints 2-4; antennae scarcely as long as the head and thorax united, 

 at any rate not longer, setaceous, the first joint of the flagellum a 

 little more than one-quarter shorter than the second ; dorsulum com- 

 pactly punctured ; scutellum impressed, more distinctly punctured 

 than the dorsulum ; metathorax above and posteriorly coarsely and 

 transversely striated, the upper surface strongly sulcate medially, 

 metapleurse granulated ; legs tolerably spinose ; pygidial area strongly 

 and sparsely punctured, in length nearly twice longer than its width 

 at the base. Black ; abdomen varying from red and black to en- 

 tirely red ; tarsi testaceous; wings dark fuscous, iridescent; marginal 

 cell truncate; face, clypeus and abdomen with a sparse sericeous 

 pile ; metathorax with sparse, fuscous pubescence. Length 

 14-16 mm. 



$ . — Anterior margin of clypeus rounded-out, not dentate lateral- 

 ly ; front and vertex more coarsely sculptured than in the 9 ; space 

 between eyes at top somewhat greater than the length of antennal 

 joints 2-4 united ; antenna? much shorter than the head and thorax 

 united, the first joint of flagellum about one-quarter shorter than the 

 second ; dorsulum with the punctures distinct ; scutellum likewise, 

 impressed; metathorax above transversely rugose; legs feebly 

 spinose ; abdomen closely and distinctly punctured ; last dorsal seg- 

 ment not keeled laterally; first three segments of abdomen red ; 

 front, face, clypeus and thorax more or less, with sparse silvery 

 pubescence ; abdomen with silvery pile. Length 12-13 mm. 



Kansas ; Nebraska ; Texas. 



