328 MEMOIRS ON THE COLEOPTERA 



Prothorax subparallel, widest at about the middle, the sides very evenly 

 and strongly rounded throughout; under surface black throughout, 

 except the inflexed sides of the prothorax (cf), or excepting the 

 entire prosternum before the coxae (9) 3 



3 Elytral punctures very dense and rather fine posteriorly, moderately 

 coarse and separated anteriorly, the pronotal punctures moderate 

 or rather small, sparse; color deep black, shining throughout, the 

 prothorax red above and beneath, with only the coxae, sternal 

 process and margins of the acetabula black; antennae (cf) as long 

 as the body, nearly as in the preceding, very slender, or ( 9 ) nearly 

 three-fourths as long as the body; prothorax more than two-fifths 

 wider than long, the apex much narrower than the base; surface 

 even; elytra a little less than two and one-half times as long as wide, 

 the humeri rather prominent; black area of prosternum (cf ) opaque 

 and strongly punctate, red and nearly smooth ( 9 ) Length (cf , 9 ) 

 11.0-12.0 mm.; width 3.0-3.2 mm. Montana to Texas; [sanguini- 

 collis Germ.] ignicollis Say 



Elytral punctures everywhere notably coarse, still larger basally; colora- 

 tion as in ignicollis, the under surface more piceous in the type; 

 body much smaller; antennae (9) dark piceo-rufous, slender, about 

 two-thirds as long as the body, nearly as in ignicollis but a little 

 shorter, the third joint barely more than three times as long as wide, 

 the tenth but very little longer than wide; prothorax nearly as in 

 ignicollis but less narrowed apically and with much coarser and less 

 numerous punctures, the erect hairs sparser; scutellum triangular, 

 wider than long, not very acute; elytra similar but shorter, only 

 slightly more than twice as long as wide; basal joint of the hind 

 tarsi a little shorter, not quite as long as the remainder. Length 

 (9) 8.0 mm.; width 2.2 mm. New Mexico (locality unrecorded). 



punctipennis n. sp. 



4 Colors and sexual characters as in ignicollis, except that the black and 

 strongly punctate area of the male prosternum extends further 

 upward anteriorly, so as to appear slightly on the upper surface at 

 the anterior angles; antennae (cf) similar, though a little shorter 

 and stouter throughout; prothorax nearly similar, being slightly 

 more transverse and rather more narrowed anteriorly, with the 

 punctures coarser and more numerous, the erect hairs paler; elytra 

 less parallel, slightly narrowed from base to apex, more elongate, 

 less evidently wider than the prothorax; legs longer, the hind femora 

 extending well beyond the elytra. Length (cf,9) 12.0-13.0 mm. ; 

 width 3.2-3.9 mm. New Mexico (Jemez Springs).. . acomana n. sp. 

 Colors and other general characters as in the preceding but shorter and 

 with the elytra parallel, not subcuneiform; antennae (9 ) still shorter 

 than in acomana, but little more than half as long as the body; 

 prothorax similar but still more narrowed at apex, with still coarser 

 punctures and less numerous erect hairs, the apex scarcely more than 

 two-thirds as wide as the base; elytra more evidently wider than the 

 prothorax and distinctly shorter, only a little more than twice as 

 long as wide, perfectly parallel, very broadly rounded at apex; legs 

 similarly much longer than in ignicollis, the hind femora extending 



