H. C. FALL. 91 



and about T \ wider than the prothorax ; a little wider at apical third, 

 more noticeably so in the female ; elytral series of punctures unim- 

 pressed, very fine, becoming subobsolete on the declivity, connected 

 by transverse impressed lines in basal third, except near the suture ; 

 the interstitial punctures on intervals 4, 8, 12, fine but discernible. 

 Legs moderate. Length 21-24 mm. 



Southern California (San Bernardino, Riverside and Pasa- 

 dena). 



Parvicollis is closely allied to prominens, from which it 

 differs most obviously in its more finely punctured head and 

 relatively small prothorax. Careful measurements of the 

 specimens in my collection show that the relative width of 

 elytra to thorax varies in prominens from 1.39 to 1.58 (ave. 

 1.48) and in parvicollis from 1.64 to 1.73 (ave. 1.69). The 

 difference is quite conspicuous when series are compared. 

 Prominens is also a larger species ; it is common in Arizona, 

 but whether it occurs in California is uncertain, the speci- 

 mens recorded under this name in my Southern California 

 list being the one here described. 



C. eremicola n. sp. 



Form of peregrinator , black throughout, without trace of metallic 

 lustre. Head finely punctate, and subrugulose ; sides of prothorax 

 narrowly rounded or subangulate, nearly as in peregrin ator. Elytra 

 about | longer than wide, the punctured series feebly impressed basally, 

 the punctures rather coarse in basal two-fifths, thence becoming rapidlv 

 smaller, very minute apically ; sides near the humeri with a few rather 

 faint transverse rugae. Length, 17-19 mm. ; width, 8-10.3 mm. 



San Clemente Island, Southern California. 



Described from a single pair collected and given me by 

 Air. Don Ross of Pasadena, California. 



The above very brief description is sufficient when the dif- 

 ferences between it and peregrinator have been pointed out. 

 The size is very much smaller in eremicola, the sides of the 

 prothorax a little less evidently angulate, the elytra relatively 

 shorter, the ratio of length to width being 1.44 in the male 

 and 1.40 in the female ; while in peregrinator the length 

 ranges from 1.60 to 1.75 times the width. The strial punc- 

 tures of the elytra are much coarser basally in eremicola, and 

 the last ventral of the female is unmodified. In peregri/ia- 



TRANS. AM. ENT. SOC, XXXVI. MAY, 1910. 



