246 MEMOIRS ON THE COLEOPTERA 



obtuse apex, two-thirds longer than wide, fully a third wider than 

 the prothorax, finely, remotely punctate, rather coarsely and rugosely 

 though scarcely more closely toward the suture posteriorly, the 

 raised lines evident, the outer one obsolete; prosternum finely punc- 

 tate and pubescent, the metasternum conspicuously so throughout; 

 tarsi moderate, the channel obsolete on the second and third joints 

 of the intermediate. Length (9) 40.0 mm.; width 16.8 mm. 

 Mexico (Colonia Garcia, Chihuahua), C. H. T. Townsend. 



*townsendi n. sp. 



Basal angles of the prothorax not turned upward, right and more or 

 less blunt, not at all prominent 3 



3 Form much narrower, moderately shining, pale rufo-testaceous in 

 color throughout; head small, the eyes transverse, but slightly 

 convex, the inner part not much developed, about half divided by 

 the rounded emargination, separated by two-thirds their width in 

 both sexes, the tempora not more prominent (cf ), diverging toward 

 base (9); antennae (cf) stout, only very slightly tapering, barely 

 two-thirds as long as the body, the fifteenth joint simple, as long as 

 the preceding, much compressed, narrowing from the rounded apex 

 to the base, broad and with its surface moderately irregular, or ( 9 ) 

 slender, two-thirds as long as the body, with the fifteenth joint 

 composed of a basal part similar to the preceding joint though 

 smaller and a broad, obtusely truncate and abruptly narrowed pro- 

 longation without dividing suture; prothorax small, more than twice 

 as wide as long, nearly as in the preceding, except the basal angles 

 and in the less coarsely punctate lateral part of the surface; elytra 

 very moderately narrowed from base to apex, dehiscent near the 

 latter in the female, three-fifths longer than wide (cf ) to three- 

 fourths (9), with rather coarse and close, impressed, rugose punc- 

 tures, becoming fine and sparse basally, the raised lines feeble, more 

 distinct in the male; sterna densely pubescent though as usual more 

 conspicuously in the male; tarsi nearly as in the preceding. Length 

 (cf) 31.0, (9) 36.5 mm.; width (cf) 12.6, (9) 13.0 mm. Mexico 

 (Ciudad de Durango) *aztecus n. sp. 



Form very stout, oblong-subparallel, moderately convex, piceous-black, 

 * the abdomen piceo-rufous, strongly shining; head small, rather nar- 

 rower behind than across the eyes, the latter moderately convex, 

 separated by fully twice their width ; antennae (cf ) stout, dark brown, 

 tapering very gradually and but slightly, extending to apical third of 

 the elytra, the joints strongly biserrate from a dorsal viewpoint, the 

 oblique lower lobe sinuate only toward the inner side of the apex, the 

 outer oblique projection strong, the fifteenth joint twice as long as 

 wide, a little longer than the preceding, compressed, with a strong 

 projection on its inner face near the base; prothorax very short, 

 not quite three times as wide as long, the apex feebly, subevenly 

 sinuate, the base distinctly lobed medially, the teeth distinct, finely 

 acute, the punctures numerous, fine and strong, but little larger 

 laterally; scutellum semicircular; elytra barely one-half longer than 

 wide, the sides parallel, broadly arcuate, converging a little apically; 

 punctures fine, sparse, the surface becoming coarsely impresso- 



