178 CALIFORNIA ACADEMY OF SCIENCES. 



Mycterus. M. concoLor is not rare in the San Bernar- 

 dino and other ranges of the southern Sierras, in June 

 and July; the variety flavipennis occurs rarely with the 

 type: quadricollis is said by Crotch to occur on flowers 

 of Agave, at Temescal: canescens is found also in the 

 Sierras, but farther north. 



PYTHID^E. 



Priognathus. P. monilicornis, Tallac (Lake Tahoe), 

 under bark (Fenyes). 



Cononotus. G. macer, Owens Valley: punctatus, San 

 Jose: sericans, San Jose and San Diego. 



Salpingus. 8. alternatus is northern. 



Rhinosimus. R. ceneirostris, about San Francisco. 



(EDEMERID^E. 



Calopus. C. angustus, "Cal.," probably northern. 



Ditylus. D. quadricollis, from the northern and 

 middle Sierras. 



Nacerdes. N. melanurus, Long Beach; a single dead 

 specimen washed up by the waves. I have not thought 

 it wise to place this species in the foregoing list on so 

 slender a basis. 



Xanthochroa. X. calif ornica, middle Sierras: cen- 

 tralis, Sylvania (Ricksecker): 'marina, Marin County. 



Copidita. C. quadrimaculata is rather common, un- 

 der rubbish along the sea beaches at Santa Monica and 

 San Francisco: bicolor is northern: cyanipennis, "Coast 

 Range below San Francisco." 



Asclera. A. nigra, San Bernardino County: excavata, 

 foot-hills near Pomona, April and May: discolor is 

 northern. 



Chrysanthia. C. repanda, Yuma. 



