io8 MEMOIRS ON THE COLEOPTERA 



thirds longer than wide, widest at the middle, with evenly arcuate 

 sides, the surface notably convex, flat between the broadly, feebly 

 and obtusely elevated suture and the costa, which is strong; rugae 

 fine, slightly shining, well separated, transversely tortuous laterally, 

 the edge not at all thickened or reflexed, the depressions very opaque, 

 with close and very feeble small tumidulous rugulosity; abdomen 

 alutaceous, finely, moderately closely punctulate, the last segment 

 strongly and closely, each puncture with a minute pale glistening 

 hair. Length (9) 20.0 mm.; width 9.6 mm. Arizona. 



reptans n. sp. 



First costa evident though vestigial and sometimes only formed by a 

 succession of more pronounced or more longitudinal detached rugae. 4 



4 First costa very oblique, joining the suture at about the middle of 

 the length. Form rather narrow and elongate, moderately convex, 

 black, opaque, the elytral rugae slightly shining; head only very 

 slightly impressed, the small pale hairs very coarse; prothorax 

 three-fifths as wide as the elytra, about a third wider than long, 

 widest near the middle, the sides serrulate, rounded, converging and 

 less arcuate to the blunt and subeverted apical angles and less con- 

 vergent posteriorly and rounding to the parallel and straight por- 

 tion before the basal angles, the latter right and not very blunt; 

 surface medially convex, coarsely, very densely and confluently 

 punctate, broadly concavo-explanate and transversely rugose 

 laterally; elytra three-fourths longer than wide, elongate-oval, 

 with rounded sides, widest at the middle, the surface sharply and 

 not densely, transversely plicate, the medial costa rather strong, the 

 short oblique one feeble but distinct; depressed parts opaque, feebly 

 and finely, tumidularly punctate, each puncture bearing a very 

 minute and suberect pale and obvious hair; abdomen alutaceous, 

 strongly micro-reticulate, finely, not densely punctate and with 

 small pale hairs, the terminal segments more coarsely but not densely 

 punctate. Length (9 ) 17.7 mm.; width 8.4 mm. Without locality 

 label but probably from southern Arizona socer n. sp. 



First costa not oblique, gradually approaching the suture but separated 

 therefrom, and, when more distinct, evidently uniting with the 

 median costa near the summit of the declivity 5 



5 Discal costa unusually strong, the space between them and across the 

 sutural regions nearly flat 6 



Discal costa more or less feeble, the surface of the elytra almost evenly 

 convex from side to side 7 



6 Body rather narrow and elongate, unusually flat above, dark rufo- 

 piceous, dull, the elevations shining; head densely opaque as usual, 

 the sparse pale hairs distinct; prothorax about a fifth wider than 

 long, the converging sides basally becoming parallel or even feebly 

 everted near the basal angles; base transversely rectilinear through- 

 out; surface coarsely, deeply, closely and irregularly punctate, 

 gradually deplanate but punctured and scarcely at all transversely 

 rugose laterally, each puncture bearing a small yellowish hair which 

 is unusually evident; elytra elongate-oval, one-half wider than the 



