REVISION OF TENEBRIONID SUBFAMILY CONIOXTIN^E 9I 



Prosternal process strongly and unequivocally margined throughout its 

 contour 2 



Prosternal process not margined apically 7 



2 — Elytral punctures rather small and sparse but very distinct 3 



Elytral punctures excessively minute, observable with difficulty under 

 a hand lens 6 



3 — Elytral punctures not sensibly piliferous 4 



Elytral punctures each with a very small but evident decumbent hair.. 5 



4 — Body oblong, only moderately convex, deep black, rather shining 



throughout ; head somewhat finely but strongly, not densely 

 punctate, the lobes very feebly impressed, the anterior canthus 

 very broadly rounded, as prominent as the posterior; prothorax 

 not more than one-half wider than long, the sides just visibly 

 converging and nearly straight to about the middle, then rapidly 

 more rounded, then more strongly converging and but feebly 

 arcuate to the apex, which is nearly three-fourths as wide as the 

 base, circularly sinuate, with the angles right and but slightly 

 blunt; surface very finely, sparsely punctate, becoming much less 

 finely, more closely and rather strongly so laterally, the marginal 

 bead very fine; elytra parallel, not quite one-half longer than 

 wide, as wide as the prothorax, obtusely ogival at tip, nearly 

 smooth, the margins finely reflexed ; prosternum rather finely but 

 strongly, somewhat sparsely punctate, the process broad, ogival 

 at tip ; abdomen and hind femora finely, rather sparsely punctate. 

 Length 9.6 mm. ; width 4.5 mm. Arizona (probably the extreme 

 western part) histrio n. sp. 



Body rather stouter in outline and decidedly more convex, deep black, 

 duller in lustre, feebly alutaceous ; head more strongl}- and closely 

 punctate, not impressed at the apical lobes, the anterior canthus 

 more narrowly rounded, slightly less prominent than the posterior ; 

 antennte similarly slender; prothorax nearly similar but more 

 transverse, fully three-fifths wider than long, much duller, the 

 fine punctures stronger and less sparse medially, becoming much 

 larger, perforate and very close-set laterally ; scutellum rather 

 larger and more broadly triangular ; elytra scarcely more than 

 two-fifths longer than wide, as wide as the prothorax, very obtuse 

 at tip, the surface feebly undulato-rugose apically, elsewhere nearly 

 smooth but with very obsolete broadly convex lines, the punctures 

 rather stronger and more close-set than in histrio., very distinct, 

 although the surface is somewhat dull ; prosternum rather sparsely 

 and finely punctate, the process narrower, impressed along its 

 median line, the impression terminating in a deep discal fovea near 

 the apex — perhaps an accidental character ; abdomen and hind 

 femora very finely, sparsely punctate, polished. Length 9.5 

 mm.; width 4.65 mm. San Bernardino Co ancilla n. sp. 



5 — Form stout, rather convex, oblong, deep black, only very feebly 



alutaceous ; head unusually short and transverse, rather coarsely and 



