320 SPECIES OF COELUS (COLEOPTERA; TENEBRIONIDAe) 



those on the middle anteriorly somewhat smaller; sinus deep, lobes very prom- 

 inent, semicircularly rounded, the surface rather deeply impressed next to the 

 sinus; sides arcuato-sinuate, obUque suture more or less distinct; punctures of 

 the front immediately behind the suture coarse, close, coalescing to a varying 

 degree and almost without hairs at the middle. Frontal plane commencing at 

 the suture and very feebly convex. 



Pronotum rather sparsely and more or less finely and deeply punctate, 

 these punctures uneven in distribution with large impunctate areas, becoming 

 closer and mingled with larger punctures on the expanded lateral margin; sides 

 broadly arcuate, converging anteriorly; apical angles more or less broadly 

 rounded. 



Mentuni large; apex deeply and broadly sinuated; sides more or less arcuate, 

 lobes rather broadly rounded; surface with a few coarse punctures in the 

 central area but otherwise smooth, deeply impressed and rough along the 

 sides and base. 



Prosternum coarsely punctato-rugose before the coxae; process coarsely 

 punctate throughout and rather broadly margined between the coxae. 



Elytral sculpturing rather strongly muricate. 



Male.- — Somewhat broader and rather less inflated. 



Female.- — More oblong and more or less strongly inflated. 



Measurements. — Length, 8.5 — 12 mm.; width, 5-7 mm. 



The chief characteristics of grossus are the large size, coarse 

 punctuation and the large impunctate areas of the pronotum. 



This variety is plainly related to glohosus by the deep epistomal 

 sinuation, shape and sculptming of the mentum, form, and 

 punctuation of the prosternal process. In extreme cases not 

 distinguishable from globosus. 



Coelus globosus var . grossus form saginatus Casey 



Size large. Form broad, oblong-oval. Pronotal punctures coarse, rather 

 closely and quite evenly placed. 



Apparently there is less difference in shape between the sexes 

 in this form than in grossns;the body is rather shorter in soginatus, 

 although in a large series from the same area this difference be- 

 comes evanescent. 



Casey gives the following measurements: Length, 7.6-9.6 mm. 



A large series collected at San Pedro, March 13th, 1910; Arch 

 Beach, April 4th, 1916, and Redondo, March 5th, 1898, quite 

 convincingly demonstrates that saginatus is a form of grossus. 

 They inhabit the same areas and behave like individuals of a 

 single species. 



