248 CALIFORNIA ACADEMY OF SCIENCES [P*oc. 4th Sn. 



283. Ploas nigripennis Loew 

 Several specimens from Hood River, V-5 to VI-24 

 (Cole); Mary's Peak, V-16 (Lovett) ; Corvallis, V-4; 

 Pamelia Lake, VII- 19. 



284. Lordotus apicula Coq. 

 Burns, VI- 19 (Thompson). 



285. Lordotus gibbus Loew 



Lakeview, VIII-24 (Thompson) ; Freewater, IX-28; Her- 

 miston, IX- 18 (Rockwood). 



286. Acreotrichus americanus Coq. 

 Hood River, V-10 (Cole). 



287. Eclimus celer Cole 



Parkdale, VI-18 (Cole). 1919, Proc. Cal. Acad. Sci., 

 Ser. 4, IX, p. 224. 



288. Eclimus lotus Will. 



Quite common at Hood River, VI-5 to X-l (Cole). 

 Females were collected around old burned logs and lumber 

 piles. Like many other bombylids they will alight in a cer- 

 tain place in the sunlight, and, if frightened, will keep return- 

 ing to the same spot. 



Apparently auratus Will, is the same as this species. Wil- 

 liston described both species on the same page (Kansas 

 Univ. Quarterly, vol. 2, No. 2), but lotus has at least para- 

 graph priority. The type of lotus was a male specimen from 

 California; auratus was described from two females from 

 the state of Washington, and might easily be thought 

 another species. The female is much brighter colored than 

 the male, unrubbed specimens being almost entirely covered 

 with golden tomentum on the dorsum of the thorax and 

 abdomen. There is considerable variation in size in the 

 species. 



289. Eclimus luctifer (O. S.) 

 Parkdale, VI-18 (Cole) ; Hood River, VII-5 and Forest 

 Grove, VII-8 (Cole); Joseph; Cascadia, VII-21. Several 



