100 GEO. H. HORN, M. D. 



space, otherwise sparse. Elytra one-third wider than the thorax aad slightlv 

 longer, the punctuation equal to that of the thorax, deep, closely and regularly 

 placed. Abdomen rather coarsely and closely punctate the surface distinctly alu- 

 taceous. Legs rufo-testaceous. Length .34-.40 inch; 8.5-10 mm. 



Male. — Seventh ventral segment deeply emarginate, the emargination nearly 

 twice as deep as wide and rounded at bottom (PI. 2. fig. 13). 



Female. — Seventh ventral entire. 



This species is closely related to cali/oruicum, but differs in both sexes 

 by the form of the head. 



Occurs in California, Arizona and Utah. 



18. C californicuni Lee. — Piceous or nearly black, shining. Antennae 

 piceous, much shorter than the head and thorax. Head oval, sides parallel or 

 very slightly convergent behind, coarsely not closely punctate, smoother in front, 

 surface shining. Thorax narrower than the head, scarcely a fourth longer than 

 wide, slightly narrower posteriorly, median smooth space distinct, the punctures 

 on each side a little coarser than those on the head and not numerous. Elytra 

 one-fourth wider and a little longer than the thorax, punctuation finer than on 

 the thorax, densely placed, the surface shining. Abdomen rather coarsely and 

 moderately closely punctured, surface slightly iridescent. Legs pale rufo-testa- 

 ceous. Length .30-.34 inch ; 7.5-8.5 mm. 



Male. — Seventh ventral segment with a deep notch with nearly parallel sides 

 and rounded at bottom and prolonged in a shallow groove forward ; sixth segment 

 broadly and feebly emarginate at middle (PI. 2, fig. 14). 

 Female. — Ventral segments entire. 



While it superficially resembles fumidum. the present species is really 

 more nearly related to pallipes. 



Occurs in Vancouver, Nevada ivnd through California to the south. 



19. C pallipes Grav.— Piceous, nearly black, shining. Antennae rufo-tes- 

 taceous or brownish, nearly as long as the head and thorax. Head oval, punctua- 

 tion a little variable, either quite sparse or moderately close, sides nearly parallel 

 or slightly arcuate. Thorax a little narrower than the head, barely a fifth longer 

 than wide, median smooth space well defined, the punctures each side moderate 

 in size not closely but rather regularly placed over the entire surface. Elytra a 

 very little wider than the thorax and as long or a very little longer, the punctua- 

 tion finer than that of the thorax, rather densely placed and sometimes submuri- 

 cate towards the sides. Abdomen rather coarsely and closely punctate. Legs 

 rufo-testaceous. Length .30-. 44 inch; 7.5-11 mm. 



Male. — Last ventral triangularly emarginate, the notch as wide as deep; sixth 

 ventral entire (PI. 2, fig. 15). 



Female. — Ventral segments entire. 



In studying the material before me I find a certain amount of varia- 

 tion in the form of the head and its sculpture and the length of the 

 elytra as compared with the thorax. The head may have the sides either 

 slightly arcuate or nearly parallel, the former being usually but not always 

 in the male, and as nearly all the species exhibit a sirailer variation this 

 is passed without further notice. The variation of the elytra in length 



r 



