208 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



; hallow, with two rows of shallow pits forming an arch across the top. Some- 

 times the pits are obscure, but the arch is evident. Neck of enclosure narrow. 

 Lateral faces of metathorax shining, smooth, or sometimes rough-looking, 

 with sparse round punctures and a few short hairs. Prothoracic spine short, 

 sharp. Mesopleura with very large round punctures, pubescence long, silvery 

 with black intermixed. Wings clouded, nervures and stigma black, or dark 

 brown. Tegulae dark, with golden hairs. 



Abdomen black, not very shiny ; base squarish ; densely punctured, except 

 first segment, which is less so at base and medially ; apical segments with black 

 and golden spines ; segments one to four with white pubescent fasciae, not 

 noticeable on the fifth ; first segment with considerable long white hair. Under 

 part of abdomen usually solid black, with no continuation of fasciae. 



Legs — Black, stout. Floccus on posterior femora sparse, white ; all rest 

 dark brown, almost black. Tibiae with more sparse but dark hair ; becoming 

 a little lighter at tips. Tarsi lighter, less dense, tinged with golden. Pos- 

 terior tibiae large, stout. First joint of posterior tarsi stout, rectangular, twice 

 as long as broad. Tibial spurs very stout, almost black on posterior legs, 

 lighter on others. All tarsal joints on posterior legs stout, all but first trian- 

 gular, about as broad as long. Claws reddish, medially toothed. Anterior 

 femora with long white hair. 



The legs, especially the hind ones, appear very stout and dark, almost 

 black, except for the brownish to ochraceous edges to some of the joints, caused 

 by the lighter tips to the hairs, or to the angle at which the light strikes. 



Described from four females. 



Type locality — Guadalajara, Mexico. 



This may prove to be C. griscus Siii., l)ut it is impossible to tell from the 

 meagre description of that species. 



