COLEOPTERA OF SOUTHERN CALIFORNIA. 107 



In its earlier stages, Placonycha is found on rocks 

 under water; the insect rests in a limpet-like covering 

 till the pupa is developed, after which time the beetle 

 leaves the cover and lives out of water (Fuchs). 



RHIPICERID.E. 



Sandalus. S. californicus, " California and Nevada;" 

 occurs at San Diego and Los Angeles (fide Fuchs). 



ELATERID^E. 



Melasis. M. rufipennis, Sonoma County; probably 

 confined to the redwood belt (Ricksecker in litt.). 



Eucnemis. E. americana occurs near Mt. Shasta. 



Dromaeolus. D. californicus, " California:" nitens, 

 northern: basalis, Lake Tahoe and in the mountains of 

 the more northern portions of the State. 



Xylobius. X. cylindriformis, " California and Ne- 

 vada" (Horn); Mendocino County (Van Dyke). 



Sarpedon. S. scabrosus, one example, Pasadena (Fen- 

 yes). 



Palaeoxenus. P. dohrnii, a species said to have been 

 found near San Diego, but this is probably an error, as 

 is suspected by Horn; the species is quite surely tropical. 



Anelastes. A. druryii is common in the higher parts 

 of the Sierras; frequently taken on the wing about 

 camp-fires, in the San Bernardino Mountains, July and 

 August. 



Adelocera. A. sparsa, rather rare in Los Angeles 

 County: profusa and rorulenta occur in the Lake Tahoe 

 region, under bark. 



