260 



U. S. NATIONAL MUSEUM BULLETEST 20 9 



This is very close to C. bipunctata and has allopatric distribution. It 

 is rated as a full species rather than as a subspecies of bipunctata be- 

 cause there are several distinctive color differences, the male genitalia 

 nre slightly different, and no intergrading specimens are at hand. 



Specimens (35 cf, 339): From British Columbia (Osoyoos); Cali- 

 fornia (Berkeley, Dos Palos, Los Angeles County, Newport Bay, San 

 Francisco, and Telsa) ; Colorado (Colorado Springs, Sterling, and Two 

 Buttes); Idaho (Lewiston and Payette); Kansas (Cloud County, 

 Dickinson, Hamilton County, Kiowa County, Logan County, Man- 

 hattan, Morton County, Reno County, Trego County, Wallace 

 County, and Wichita County); Nebraska (Bartley and Cambridge); 

 New Mexico (Albuquerque, Broadview, Las Vegas, 20 miles north of 

 Las Vegas at 6,650 ft., and Ship Rock); Oregon (Juntura, The Dalles, 

 and La Grande); Texas (Fort Davis); Utah (Utah Lake); Washington 

 (Almota and Wawawai) ; Wyoming (Newcastle and Weston County) ; 

 and Mexico (Canutillo in Durango and 15 km. east of Sombrerete in 

 Zacatecas). 



Figure 152. — Localities for Ceropales nigripes. 



Most collection dates are in July and August. Those outside these 

 two months are: June 25 at Sterling, Colo. ; June 29 at Payette, Idaho; 

 June 30 at Cambridge, Nebr., "June" in Morton County, Kans. ; 

 Sept. 2 at Dos Palos, Calif.; Sept. 16 at Manhattan, Kans.; and Sept. 

 25 at Telsa, Calif. Flower records comprise Tamarix gallica, Melilotus 

 alba (2 collections), Sphaeralcea angustifolia, Eriogonum sp., Asclepias 

 verticillata, and Asclepias sp. 



This species occurs in the Upper and Lower Sonoran faunas. Adults 

 fly mostly in July and August. 



7. Ceropales bipunctata Say 



Forewing of male 10 to 16 mm. long, of female 11 to 16 mm. long; 

 frons, mesoscutum, and mesopleiu-on with very fine and dense small 



