TENEBRIONID^E 211 



wide, moderately obtuse posteriorly, the apex rather prominent and 

 ogival; sides feebly converging and slightly arcuate to the obtuse 

 and rather rounded humeral angles; surface polished, with the tu- 

 bercles unusually numerous and strong, mingled with many others 

 which are smaller and feebler, the side margins only very moderately 

 elevated, very uneven and granose; erect setae rather long; abdomen 

 with small, strong, imbricate reticulations, with a minute acute 

 puncture at the posterior end of each imbrication, shining, the pale 

 hairs very short; prosternum coarsely, tubercularly rugose. Length 

 (cf ) 11.5 mm.; width 7.0 mm. Southern California, Sanford. 



pertinax n. sp. 



Body less stout and duller, dark blackish-brown to ferruginous in color; 

 head moderately impressed transversely and on the vertex, dull, 

 coarsely and very densely punctate throughout; prothorax moder- 

 ate, one-half wider than long, nearly as in pertinax in outline, except 

 that the apex is much less deeply though circularly sinuate and less 

 greatly narrower than the base, and that the basal angles are ex- 

 tremely feebly everted though right, the surface much more strongly 

 tumid transversely at basal third, impressed just behind the middle 

 at each side of the moderate anterior convexity, rather coarsely, 

 perforately and densely but not coalescently cribrate throughout, 

 the side margins broadly and gradually but much less strongly 

 reflexed, coarsely and densely punctato-rugose, the edge strongly 

 serrulate; elytra four-fifths longer than wide (9), a little shorter 

 (cf), nearly a fourth to fully a third wider than the prothorax, 

 parallel (c?) or slightly posteriorly enlarged (9), the sides moder- 

 ately and evenly arcuate, the apex obtuse, very steeply declivous, 

 the apical lobe moderate though evidently differentiated; surface 

 of each with traces of two obtuse discal ridges, shining when clean 

 but usually with a thin opaque indument, the tubercles rather 

 sparse, strong and fine intermingled, the erect setae moderate, the 

 margins moderately elevated and feebly serrulate; abdomen nearly 

 smooth, finely, asperulately punctulate ( 9 ) or strongly so medially, 

 becoming nearly smooth laterally (cf). Length (cf, 9) 13.0- 

 16.0 mm.; width 5.6-6.6 mm. California. [Pelccyphorus muri- 



catulus Lee.] muricatula Lee. 



A Much more slender and parallel than muricatula, though very 

 similar otherwise, except that the elytra (cf ) are only between 

 a third and fourth wider than the prothorax and, instead of being 

 limited at the sides of the upper surface by a definite reflexed 

 cariniform line as is usually the case, this marginal line becomes 

 obsolescent and is represented only by a series of small irregular 

 tubercles along the summit of the acutely subprominent margin. 

 Length (cf) 13.5 mm.; width 5.4 mm. Southern California. 



languida n. subsp. 



5 Sides of the prothorax strongly oblique and converging posteriorly; 

 side margins of the elytra simply acute, bearing isolated irregular 

 tubercles somewhat as in languida. Form moderately stout, some- 

 what ventricose, very convex, dull in lustre, black throughout; 



