146 MEMOIRS ON THE COLEOPTERA 



subrugosely punctate at the sides, the edges unusually thick for 

 the present group; elytra but little wider behind the middle, ovoidal, 

 the sides broadly arcuate, rapidly rounding behind, the apical lobe 

 from above well denned and strong; base very minutely denticulate 

 at the sides, sinuate as usual; surface with the second costa but little 

 more distant from the side margin than from the first costa and with 

 but faint vestiges of a short intermediate costa posteriorly; concave 

 intervals decidedly shining and very evidently, though finely, 

 sparsely and submuricately punctate, also transversely creased; 

 side margin acutely cariniform, obsoletely uniting with the single 

 obsolescent prolongation of the united first and second costse far 

 down the/very steep declivity, and thence proceeding obsoletely to the 

 apical angles; abdomen shining, with very deep anastomosing creases, 

 punctate apically; legs short. Length (9 ) 16.8 mm.; width 7.4 mm. 

 California (Kern Co.) evanescens n. sp. 



3 Form (cf) very slender, the surface much smoother than in costipennis; 

 prothorax evenly rounded at the sides, as wide as the elytra, the 

 latter more than twice as long as wide, rather acute at apex, widest 

 near apical third, the costse of costipennis represented by very faint 

 longitudinal ridges; size apparently much smaller than in costi- 

 pennis. California (Tulare Valley, at the base of the hills). [Asida 

 compressa Horn] compressus Horn 



Form (cf) shorter and notably broader, deep black, highly polished; 

 head strongly, transversely impressed, very slightly alutaceous, 

 having a loose mixture of moderately large and very fine punctures; 

 antennae nearly as long as the prothorax, with the short stiff setee 

 dark fulvous in color; prothorax large, one-half wider than long, 

 equal in width to the elytra, subparallel and strongly rounded at 

 the sides, strongly convex, nearly even, with a feeble transverse basa! 

 impression medially, narrowly explanate laterally, the surface pol- 

 ished, with not very close-set punctures, which are deep and mod- 

 erately small mingled with still much smaller ones, becoming coarser 

 but not closer and with the surface alutaceous near the sides; median 

 impunctate line narrow but evident; elytra twice as long as wide, 

 but little broader behind the middle, the sides just visibly converging 

 and feebly arcuate thence to the dentiform sides of the base, the apex 

 from above with a relatively very large and feebly demarcated 

 parabolic lobe; surface polished throughout, feebly, subrugosely 

 creased transversely, extremely minutely, sparsely punctulate, the 

 suture and two costse on each feebly elevated, the three broadly 

 concave intervals equal, the third without trace of intermediate 

 ridge, the side margin elevated and costiform but obtuse and blunt, 

 becoming coarsely subcrenulate basally; prosternum and propleura 

 with deep and sparse perforate punctures, the abdomen alutaceous, 

 finely, unevenly creased, very finely punctate and extremely minutely, 

 closely punctulate; legs rather long, the tarsi well developed. Length 

 (c?) 17.0 mm.; width 6.6 mm. California, Morrison. 



neutralis n. sp. 



The name costipennis is preoccupied in Pelecyphorus, by LeConte 



