COLEOPTERA OF SOUTHERN CALIFORNIA. 169 



San Nicolas islands: rufipes, pubescens and laticornis are 

 more or less common from San Diego north through 

 the western portions of our district, especially under 

 stones and rubbish in dry places in spring: crassicornis 

 is described from "So. Gal.," and must resemble the 

 preceding in habits: obscura is plentiful along the sea 

 beaches: bicarinata occurs in the San Joaquin Valley. 



Cerenopus. C. concolor and C. costulatus are taken in 

 the Colorado Desert; the former is moderately common 

 at Palm Springs, the latter is said by Blaisdell to be rare 

 in San Diego County. 



Argoporis. A. costipennis and A. bicolor, Colorado 

 Desert: inconstans, San Diego (Horn). 



Amphidora. A. littoralis is common everywhere west 

 of the mountains; found beneath logs, rocks, bark, 

 etc.; as remarked by Blaisdell, the name is not at all 

 appropriate: nigropilosa occurs along the seashore and 

 may usually be found in numbers about the roots of 

 plants on and adjacent to the sand-dunes, or concealed 

 beneath any object that will offer shelter. 



Cratidus. C. osculans is common and widely diffused: 

 fuscipilosus occurs, according to Blaisdell, on the sum- 

 mits of the mountains about Julian; it is, perhaps, not 

 specifically distinct from the preceding. 



Stenotrichus. 8. rufipes, San Diego, Kiverside, Po- 

 mona, Santa Monica; not very common. 



Alobates. A. pennsylvanicus is northern. 



Iphthimus. /. serratus and its variety, sublcevis, occur 

 under bark, in the Sierras; the latter has been taken in 

 the San Bernardino Mountains. 



Ccelocnemis. C. dilaticollis is found in the higher 

 parts of the southern Sierras, under bark, logs, etc.: 



