TENEBRIO TENEBROIDES BEAUV. 227 



Head about as long as wide, transversely impressed on the epistoma ; 

 front scarcely convex, densely punctate, punctures moderate in size. 

 Antennae moderately long and slender, outer joints compressed. 



Pronotum subquadrate, slightly wider than long; apex truncate; base 

 subtruncate, very feebly sinuate laterally; sides moderately arcuate in 

 anterior two-thirds, thence slightly convergent to base and more or less 

 sinuate to parallel before the angles ; disk moderately convex, declivous at 

 the apical angles and slightly flattened about the basal angles, densely 

 punctate, punctures moderate and just a little larger than those on the 

 head ; apical angles narrowly rounded ; basal angles rectangular. 



Propleura densely punctate. 



Elytra widest at the posterior third, a little more than one-half longer 

 than wide ; humeri small ; sides diverging and feebly arcuate to apical half, 

 thence more strongly and broadly arcuate to apex, the latter obtusely 

 rounded ; disk rather strongly convex posteriorly, less so anteriorly, evenly 

 and arcuately declivous posteriorly, densely ruguloso-punctate, striate, 

 striae fine and broken up into short lines by the rugulae, sometimes scarcely 

 evident. 



Male. Form somewhat narrower. Anterior tarsi moderately dilated. 



Measurements. Length, 12-20 mm. ; width, 5.2-7.75 mm. 



Habitat. Under bark. 



Holotype, female, and allotype, male, in my own collection. Para- 

 types in my own and Mr. F. W. Nunenmacher's collection. 



Type locality. Male taken at Sisson, and the female at Shasta 

 Retreat, Siskiyou County, California. 



Distribution. California (Humboldt County: Green Point Ranch, 

 elevation 1500 feet, June; Siskiyou County: Sisson, July; Shasta Retreat, 

 elevation 2416 feet, July; Shasta County, May). 



Remarks. Simulator appears to be absolutely distinct from opacus 

 Lee. The latter is apterous and the pronotum is much more strongly 

 convex. They may or may not inhabit the same territory. Opacus is 

 taken quite commonly in Calaveras County. As Horn states, the "winged 

 species has the elytra depressed, more elongate and less rounded on the 

 sides ; the thorax is also less convex, rather broader and with less rounded 

 sides." These remarks apply to simulator, which Dr. Horn considered a 

 form of opacus. 



Helops regulus, new species. Form elongate oval, slightly narrowed 

 anteriorly, convex. Color nigro-piceous, scarcely submetallic, shining; 

 legs and antennae more or less rufo-piceous ; beneath rather rufo-piceous. 



Head convex, more or less deeply and transversely impressed behind 

 the frontal suture, rather coarsely, strongly and moderately densely punc- 



