354 MEMOIRS ON THE COLEOPTERA 



prothorax; striae not coarse but deeply impressed, rather strongly 

 loosely punctate anteriorly; intervals conspicuously convex. Female 

 differing considerably, being stouter, with the elytra broader, opaque 

 and with the intervals nearly flat; ruguliform lines of the pronotum 

 deeper. Length (cf 9 ) 17.0-18.5 mm.; width 6.5-7.3 mni. New 

 Mexico (Las Vegas) sexualis n. sp. 



Body broader, moderately convex, deep black throughout, shining, the 

 elytra dull in the female; head three-fifths as wide as the prothorax, 

 parallel basally, the neck scarcely at all constricted behind the eyes, 

 which are but feebly convex; sulci coarse, parallel, slightly arcuate; 

 antennae well developed, black, ferruginous distally, the gray pubes- 

 cence conspicuous; prothorax shorter and more transverse than in 

 the preceding, one-half wider than long; base scarcely as wide as 

 the apex, sinuato-truncate; apex distinctly sinuate, the margination 

 delimited by a strong incised line; sides strongly, evenly arcuate and 

 coarsely reflexed to the stricture, which is less broadly rounded than 

 in the preceding and a little further from the basal angles; surface 

 with impressions and rugulosity nearly as in the preceding, the 

 double foveae also almost similar, except that the inner is more 

 regularly and sinuously continuous with the outer along the basal 

 margin; elytra barely one-half longer than wide, a fifth wider than 

 the prothorax; striae fine, feebly impressed, the punctures small but 

 distinct, widely and irregularly separated, obsolete apically, the in- 

 tervals about flat; marginal stria midway, it and the eighth distinctly 

 punctate; ocellate series as usual, uninterrupted. Length (9) 17.8 

 mm.; width 7.35 mm. Colorado (Akron), Shantz. .inflatula n. sp. 



6 Form very stout, oblong-suboval, moderately convex and shining, 

 the elytra subequally so in the two sexes; body and legs deep black; 

 head four-sevenths as wide as the prothorax, slightly elongate; eyes 

 rather large and somewhat prominent, the sulci coarse and deep; 

 antennae well developed, slightly thickened basally, black, ferru- 

 ginous apically; prothorax one-half wider than long; base broadly 

 sinuate, except laterally, and wider than the deeply sinuate apex, 

 the margination of the latter defined by an evenly and deeply in- 

 cised line; sides coarsely reflexed, rounded, gradually and broadly 

 sinuate basally, the angles right; anterior impression obsolete, the 

 posterior deep and distinct; ruguliform lines feeble, more evident 

 basally; inner fovea long, deeply impressed, acute at bottom, not 

 attaining the base, the outer three-fourths as long, less sharply im- 

 pressed, attaining and sometimes curving inward along the base, the 

 carina high but obtuse; elytra a third to two-fifths longer than wide, 

 only a fifth wider than the prothorax, obtusely ogival in about api- 

 cal third, the sinus broad and barely traceable; striae rather fine but 

 well impressed, the punctures comparatively coarse, crenulating 

 the broadly convex intervals, obsolete apically. Length (cf 9 ) 19.5 

 20. 8 mm.; width 8.3-8.7 mm. Texas. Three examples. 



gravida Hald. 



7 Sides of the prothorax behind the constriction long, usually diverging 

 basally, the constriction deep and abrupt, the basal angles right.. .8 



