HlSTERID^ 243 



impressed in that species, although the inner are less so than the 

 outer as usual. The propygidium is less strongly or closely punctate 

 in nigra than in papagoana. 



Carcinops sobrina n. sp. Oblong, parallel, with feebly and evenly 

 arcuate sides, polished, black, the legs piceous; head extremely finely, 

 remotely punctulate, the fine superciliary lines feebly oblique anteriorly; 

 prothorax four-fifths wider than long, the sides broadly arcuate through- 

 out, but little more so anteriorly than posteriorly, where they become 

 subparallel; marginal bead fine; surface virtually smooth, having some 

 widely and unevenly spaced, extremely small punctules toward the sides; 

 elytra longer than wide, four-fifths longer than the prothorax, only very 

 moderately narrowed apically and with feebly, subevenly arcuate sides, 

 the six striae all fine, the two inner abbreviated before the middle and 

 also at apex; lateral surface with a very short basal humeral and an 

 extremely fine and feeble oblique humeral, generally not discoverable 

 however; prosternum as usual; mesosternum almost truncate; pygidium 

 convex, polished, wider than long, with a few minute scattered punctures 

 in about basal half; propygidium very finely, sparsely punctate. Length 

 1.8 mm.; width 1.05 mm. California (San Diego), Ricksecker. A 

 single example. 



Allied to gilensis but narrower, much more parallel, or with more 

 feebly arcuate sides, rather shorter prothorax, less impressed striae 

 and finer and much sparser propygidial punctures. 



Carcinops bisculpta n. sp. Broadly oblong-oval, moderately convex, 

 blackish-piceous with rufous legs, highly polished; head with a loose 

 mixture of fine and extremely minute punctulation; frontal margin finely 

 and strongly beaded; prothorax short, nearly twice as wide as long, 

 the moderately converging sides rather strongly, subevenly arcuate, the 

 marginal groove rather coarse; surface very minutely, rather closely 

 punctulate and, at each side, there is a broad, inwardly obtusely angulate, 

 sharply defined area, in which the punctures become abruptly relatively 

 coarse and conspicuous though sparse; elytra scarcely as long as wide, 

 four-fifths longer than the prothorax, the striae coarse, punctulate, the 

 fifth and sutural gradually fine, feeble and forming two series of fine 

 obsolete punctures anteriorly, united at base by an acute arc; humeral 

 stria entire and very coarse, the subhumeral wanting, the oblique humeral 

 extremely fine; surface smooth, punctured at apex, the inflexed sides 

 very coarsely striate and carinulate basally; propygidium coarsely, 

 rather closely punctate, the pygidium convex, with small but deep 

 close-set punctures, gradually finer and sparser apically; mesosternum 

 rather strongly sinuate. Length 2.3 mm.; width 1.4 mm. Arizona. 



This species is closely allied to opuntice, and with it and the 

 following, represents a very peculiar section of the genus, because 

 of the coarse, deep and entire humeral stria; it differs from opuntice 

 in its slightly shorter, relatively broader outline, in the sharply 



