328 SPECIES OF coELus (coleoptera; tenebrionidae) 



Coelus arenarius Casey 



This species was described from specimens collected at San 

 Pedro, Los Angeles County, 'California, and was founded on two 

 examples. Specimens have been identified by the author from 

 "Southern California" and Arch Rock, Los Angeles County. 



Size varying, usually, between that of debilis and saginatus. Form more or 

 less broadly oblong-oval and moderately convex. 



Labrimi with two to four punctules scattered on the apical third, otherwise 

 smooth. 



Epistoma arising abruptly at base from the frontal suture. Base on the 

 vertical edge coarsely punctured and more or less transversely rugose; median 

 area less coarsely and sparsely punctate; laterally the punctures are large, 

 coalesce to a varying degree and are more or less dense; apex broadly and very 

 feebly sinuate, the sinus more or less evenly rounded; lobes not at all prominent, 

 broadly rounded to the arcuato-subsinuate sides of the front, the latter quite 

 broadly and transversely impressed behind the suture, there more or less 

 densely punctate, the punctures varying greatly in size and more or less coales- 

 cent, each with a yellow hair, these irregularly directed. 



Mentum strongly sculptured, sides straight and divergent, apex feebly and 

 broadly sinuate; angles moderately rounded; surface coarsely punctato- 

 scabrous, more or less flatly impressed each side of a more or less distinct median 

 carina. 



Pronolum widest slightly before the base in the type form; sides quite strongly 

 arcuate and convergent; disk liroadly and not strongly convex transversely, 

 sparsely and more or less regularly punctate; punctures rather dense at the 

 sides where also they are more or less intermingled with coarser punctures; 

 sides more or less decUvo-explanate. 



Prosternum not very coarsely punctate, these punctures not strongly im- 

 pressed, subasperate. Process distinctly impunctate along the middle and on 

 the central area of the dilated apex; punctures rather strong at the periphery, 

 each with a long yellow hair; marginal bead rather strong and usually extending 

 beyond the coxae. 



Elytra about as wide as the pronotum; moderately inflated, more or less 

 coarsely and asperately punctate, punctures more strongly graiuilose toward 

 the apex. 



Ahdoinen rather more than sparsely punctate, puiujturcs rather strong and 

 moderate in size. 



Sexes less differentiated than in globosus and ciliatus. In the female the 

 pronotum may be as wide as in the male, or less so and the form more elongate. 



Measurements. — Length, 8.4 mm.; width, 5.1 mm. The two specimens that 

 served as a basis for the original description measured G..^ and S.5 mm. in length. 



Type locality. — San Pedro, California. 



Coelus arenarius variety sternalis Casey 



A small series recently collected at Santa Barbara by Mr. Van 

 Duzee is referaVjle to this variety. The distinguishing character 



