290 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



ver Island but I have taken it at Salamanca, N. Y., in July, 

 and have seen specimens taken at Lake Temagami, Ont., in 

 August. This evidently is a boreal form that follows dawn 

 the Sierra from British Columbia. 



213. Idiocerus nervatus Van D. Niles Canyon, May, 1916; 

 Crystal Springs, June 25, 1916. This species is as widely dis- 

 tributed in the west as in the east. Immature individuals are 

 more yellowish and hardly show the dark nervures through 

 the elytra. 



214. Idiocerus verticis (Say). Niles Canyon, July 24, 

 1916; Redwood Canyon, August 6, 1916. The identity of 

 this species is in some doubt. 



215. Idiocerus musteus Ball. San Francisco, July 26, 1916; 

 Niles Canyon, May, 1916; Crystal Springs, San Mateo Co., 

 June 25, 1916. 



216. Idiocerus morosus Ball. Redwood Canyon, August 6, 

 1916; Wawona, June, 1916. 



217. Idiocerus verrucosus Ball. Fallen Leaf Lake, August 

 21, 1916; Placer Co., 4500 feet, August 20, 1916; Summit, 

 Placer Co., 7000 feet, August 24, 1916. Mr. Giffard seems to 

 have found this species abundant as he brought home long 

 series from these localities. 



218. Idiocerus ensiger Ball. Summit, Placer Co., August 

 24, 1916. This species is quite distinct by its fulvous color 

 and the long oviduct of the female. 



219. Idiocerus feniorafus Ball. Donner Lake, August 24, 

 1916. 



220. Idiocerus snowi G. & B. Hoberg's Resort, Lake Co., 

 August 2, 1916; Hamilton Station, Tuolumne Co., June 16, 

 1916; Los Altos, July 26, 1916; Walnut Creek, August 10, 

 1916. I have found this species well distributed in San 

 Diego Co. 



221. Idiocerus pallidus Fh. Crystal Springs, San Mateo 

 Co., June 25, 1916; Fallen Leaf Lake, August 21, 1916. I 

 have taken this species at Berkeley, in September and at 

 Clear Lake, Lake Co., August 2, 1916. Our western material 

 agrees in every respect with that taken in the east. 



222. Macropsis occidentalis Van D. Niles Canyon, May, 

 1916. Contra Costa Co., May 30, 1917. 



