66 CASEY 



as long. Body oblong-elongate, very convex, shining to feebly 

 alutaceous, glabrous, the flanks sparsely puberulent ; head 

 strongly but not densely punctate, the apical margin only moder- 

 ately reflexed, sinuate at the middle, the lateral emarginations small 

 and feeble ; prothorax with the apex nearly three-fourths as wide 

 as the base, the angles slightly acute and but little blunted, the 

 surf ace convex, minutely, sparsely punctate medially, much more 

 coarsely but rather sparsely and non-muricately laterally, the sides 

 narrowly explanate and finely beaded; posterior angles small, not 

 greatly prolonged though acute ; scutellum wholly obsolete ; elytra 

 a fourth longer than wide, as wide at the middle as any part of 

 the prothorax ((^) or wider ( $ ), the sides feebly arcuate, the apex 

 obtuse; surface almost vertically declivous posteriorly, with 

 small impressed and very sparse but distinct simple punctures, be- 

 coming but little larger or closer and only very feebly muricate on 

 the flanks; hypomera ciliate; prosternum sparsely pubescent, the 

 process impunctate, pointed and unmargined at tip ; anterior 

 tibiae serrulate externally except apically, the external process long, 

 rather acute; epipleurae narrow. Length 6.3-7.9 mm.; width 

 3.3-4.7 mm. California (Kern Co.) nanus Csy. 



Color piceous-black to pale piceo-testaceous, the prothorax much more 

 transverse, always much more than twice as wide as long, much 

 wider than any part of the elytra ((J) or scarcely obviously so 

 (9 ), the sinuate apical margin of the head more strongly reflexed 

 and the lateral emarginations very distinct 5 



5 Body elongate, very convex, polished, glabrous though with a few 

 small hairs laterally ; head finely, sparsely punctate, densely near 

 the transverse suture, impunctate and polished in the apical con- 

 cavity behind the reflexed margin ; prothorax two and one-halt" 

 times as wide as its median length, the apex two-thirds as wide as 

 the base, the angles and side margins throughout nearly as in 

 nanus, the sides much more converging from base to apex, the 

 punctures very minute even laterally and much less distinct; 

 elytra narrower and more elongate, almost a third longer than wide, 

 the sides less arcuate, the apex obtuse, the punctures fine but dis- 

 tinct, sparse, feebly asperate medially, distinctly so laterally; pro- 

 sternum with only a few short hairs, the process impunctate, ob- 

 tusely rounded or subtruncate and unmargined at tip ; anterior 

 tibiae only feebly serrulate externally, the apical process moderate, 

 not so prolonged as in nanus. Length 7.9-8.5 mm.; width 

 4.3-4.8 mm. Arizona (southwestern) and California (Colorado 

 Desert) dubius Lee. 



Body nearly similar in form and size but less convex and less polished, 

 slightly alutaceous in lustre, rufo-piceous throughout ; head nearly 

 as in dubius but more angularly prominent at the sides before the 

 eyes, less strongly reflexed along the clypeal margin and more 

 coarsely and densely punctured toward the transverse suture, the 

 punctures also extending further anteriorly toward the reflexed 



