REVISION OF TENEBRIONID SUBFAMILY CONIONTIN^ II9 



nounced rugosity. Pubescence is frequently noticeable but is 

 always very short, sparse and decumbent and never so con- 

 spicuous as in the two preceding groups. The various forms in 

 my collection may be known by the following characters : — 



Elytral punctures bearing short decumbent and evident, though more 

 or less inconspicuous hairs 2 



Elytral punctures virtually nude or bearing very minute setaa, usually 

 not projecting beyond their limits 17 



2 — Larger and strongly convex species, seldom less tlian ii.omm. 



in length 3 



Smaller, less convex species, though rather more convex than in S7ib- 

 -pubescens and allies, never much more than 10. o mm. in length 

 and generally very much less 13 



3 — Species occurring in California, probably in all cases near San 



Francisco Bay; prosternal process strongly beaded throughout the 

 periphery in all the specimens at hand ; anterior canthus fully as 

 prominent as the posterior 4 



Species of Oregon; prosternal process margined feebly at the sides 

 but not at apex ; anterior canthus less prominent than the pos- 

 terior 12 



4 — Sides of the prothorax rounding and strongly converging anteri- 



orly, becoming parallel and almost straight in about basal half. ..5 



Sides of the prothorax evenly and moderately or subevenly arcuate from 



base to apex 10 



5 — Clypeal sinus only moderate in width, deep and parabolic 6 



Clypeal sinus broad, very shallow, evenly rounded in circular arc — 9 



6 — Prosternal process broadly and rather abruptly arcuato-truncate at 



apex 7 



Prosternal process narrower and evenly, semicircularly rounded at 

 apex 8 



7 — Form very broadly oblong, deep black, moderately shining, the 



anterior parts alutaceous ; head strongly but somewhat loosely and 

 irregularly punctured, the anterior canthus rounded though not 

 very broadly ; antennas slender, rufescent at tip as usual ; protho- 

 rax short, nearly four-fifths wider than long, the apex moderately 

 sinuate, two-thirds as wide as the base, the angles somewhat ob- 

 tuse and well rounded, the base ti*ansverse, not medially lobed, 

 becoming very feebly and posteriorly sinuato-oblique laterally; 

 surface finely but strongly, sparsely and somewhat unevenly punc- 

 tate, gradually quite coarsely and more closely so laterally, the 

 bead coarse and polished ; scutellum large, very transversely tri- 

 angular; elytra barely one-half longer than wide, parallel, the 

 sides very evenly rounded and converging in posterior two-fifths, 

 the apex obtusely ogival ; surface very coarsely, moderately closely 

 punctate and rugulose; prosternum strongly but rather sparsely 



