342 MEMOIRS ON THE COLEOPTERA 



body, the scape unusually bent at apex, with the external angle 

 acutely prominent ; last dorsal ( 9 ) gradually cuneiform, with the apex 

 more abruptly and broadly arcuate; fifth ventral (cf) as long as 

 the fourth, rather narrowly sinuato-truncate at apex, or ( 9 ) one-half 

 longer than the fourth, with the apex still more narrowly sinuato- 

 truncate. Length (cf 9 ) 8.0-10.0 mm.; width 2.2-2.8 mm. Penn- 

 sylvania (Harrisburg), A. B. Champlain. Abundant. 



spinosus Say 



Middle coxae equally and narrowly though distinctly separated in both 

 sexes; body small and notably slender (cf), or larger and stouter 

 (9), the humeri always having a small black spot; elytral apices 

 truncate, with the external angle still more sharply marked than 

 in the preceding; last dorsal segment (9 ) evenly and rather acutely 

 parabolic in form; body much smaller, the sexual characters nearly 

 similar, except that the fifth ventral (cf ) is distinctly longer than 

 the fourth and more narrowly truncate at tip; antennal scape some- 

 what similar. Length (cf 9 ) 6.5-8.0 mm.; width 1.75-2.25 mm. 

 Colorado, Montana and New Mexico. Abundant. . . .alticola n. sp. 



4 Integuments piceo-rufous in color; body stout; prothorax unusually 

 large, with a very stout oblique spine; humeri brown; elytral apices 

 transversely truncate but with the external angle not prominent 

 though evident; last dorsal segment (9 ) not projecting behind the 

 elytra, small, parabolic; mesosternum triangular, the coxae nar- 

 rowly though distinctly separated. Length (9) 8.2 mm.; width 

 2.4 mm. Arizona (probably southern) thoracicus n. sp. 



Integuments black; body stout, more abbreviated than in any other 

 species, the prothorax relatively less developed, with the usual 

 spines, the humeri black at base 5 



5 Elytral truncature subsinuate, the external angle notably prominent 

 posteriorly; middle coxae (cf) very narrowly, or ( 9 ) much more 

 widely, separated; fifth ventral (cf ) a little longer than the fourth, 

 rather narrowly truncate at apex; sides of the prothorax before the 

 spine only very feebly converging to the apex, sometimes subparallel. 

 Length (cf 9 ) 6.5-7.8 mm.; width 1.8-2.2 mm. Long Island 

 (Willets Point) and North Carolina (Southern Pines), Manee. 



brevis n. sp. 



Elytral truncature sharply marked, the external angle distinct but only 

 faintly subprominent; middle coxae (cf ) narrowly though distinctly 

 separated, the fifth ventral segment not longer than the fourth and 

 more broadly truncate at tip; sides of the prothorax more strongly 

 converging and nearly straight before the spine, which is not so 

 abruptly spiculiform as in the preceding. Length (cf) 7-5 mm.; 

 width 2.2 mm. Texas (Brownsville), Wickham. . .latitarsis n. sp. 



6 Middle coxae narrowly separated as usual 7 



Middle coxae subcontiguous in both sexes, the mesosternal process 

 abbreviated between them 8 



7 Elytral apices subevenly and rather strongly rounded; integuments 

 black; prothorax parallel in both sexes, equally and moderately 

 punctate; elytral punctures distinct and well separated, the erect 

 setae very short; body small in size and unusually slender; middle 



