REVISION OF TENEBRIONID SUBFAMILY CONIONTIN^ 59 



ceous ; head rather finely but strongly, moderately closely punc- 

 tured ; antennae rather slender, moderately dilated apically, the 

 third joint but little longer than the fourth ; prothorax about two and 

 a third times as wide as its median length, minutely and sparsely 

 punctured throughout, the punctures but little more distinct or 

 closer laterally, simple, the sides subexplanate, with the edges 

 heavily beaded, the bead extending entirely across the apex, but 

 becoming ver}'^ feeble medially; scutellum obsolete; elytra but 

 little longer than wide, nearly three times as long as the prothorax, 

 the sides arcuately converging in about apical half, the apex ob- 

 tusely ogival ; surface nearly smooth, minutely, remotely punctate, 

 the punctures slightly larger but only slightly less remote though 

 muricate laterally and apically, the interspaces toward apex be- 

 coming closely, evenly granulose and polished ; anterior tibiae 

 strongly produced and angulate externally at apex, the basal joint 

 of the anterior tarsi less elongate than usual, but little longer than 

 the next two joints combined; prosternum alutaceous, the process 

 thickly margined and impunctate. Length 1 6.0-1 6.5 mm. ; width 

 10.5-11.0 mm. Island of San Clemente robustus Lee. 



A — Form more oblong-subparallel and narrower than in robustus^ 

 similarly sculptured, the sides of the prothorax more rounded 

 and relatively more converging anteriorly and more parallel 

 behind the middle ; elytra more gradually and less obtusely sub- 

 ogival behind; antennae less slender; anterior tibize a little 

 shorter, relatively somewhat broader at tip ; marginal bead of 

 the prothorax not subequal in thickness throughout, as in 

 robustus^ hwX. still thicker apically than basally. Length 17.0 

 mm. ; width 10.5 mm. Island of San Clemente. 



postremus n. subsp. 



In the subspecies postremus, which is described from a single 

 female specimen, the form is obviously different from that of the 

 more evenly subelliptic and broader robustus and there are 

 several other minor differences as enumerated above ; it might 

 be added, also, that the hind angles of the prothorax are more 

 abruptly acute and more prolonged posteriorly. The abruptly 

 polished area on the posterior declivity of the otherwise sub- 

 opaque elytra is a rather remarkable character, peculiar to this 

 genus. 



Discodemus Lee. 



The components of this genus are moderately numerous but 

 so closely allied among themselves as inevitably to give rise to 

 discussion concerning their true status. I have given them spe- 

 cific rank, by no means confidently, although they are recog- 

 nizably definable and do not seem to intergrade, in fact consti- 



