290 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



Elytra at humeri one-third to two-fifths wider than prothorax at base, 

 2.8 times as long as prothorax, length to width as 5:4; intervals 

 twice as wide as striae, nearly flat, with one or two rows of punctures 

 bearing fine scales; striae deep. Scutellum elongate-triangular, 

 0.06 by 0.02 mm. Front femora 3.75 times as long as wide. Claws 

 with acute basal tooth. 



Special male characters: Tibiae 2 and 3 armed with long, dentate 

 mucrones. 



Material examined : 200 specimens including types of A. proclive 

 (female, MCZ 365, with gold disc signifying California, No. 1775), 

 and A. crassinasum (male, MCZ 366, with dark blue disc signifying 

 Oregon, No. 1774), and material determined by Hans Wagner as 

 A. nunenmacheri. 



Known distribution: 



United States: Washington: Mt. Adams (USNM). Oregron. ■ Orenco (USNM); 

 15 miles southeast of Weston (GHN). Idaho: Cassia Co., City of Rocks (UC). 

 Wyoming: Yellow Stone National Park (USNM). Colorado: Mesa Verde 

 (AMNH); Raymonds (UK). Utah: Ogden (USNM); Pintura (UK); Wasatch 

 (USNM); Wellsville (UK). Nevada: Elko Co., Pequops Summit, 6,900 ft., 

 22 miles east of Wells (BVD, DGK). California: Many records throughout the 

 State. Arizona: Coconimo Co., 6 miles north of Jacobs Lake, 7,600 ft. (AMNH) ; 

 11 miles north of Jacobs Lake, 5,500-6,500 ft. (AMNH). Cochise Co., Chiricahua 

 Mts., Rustlers Park (AMNH). Flagstaff (USNM); Grand Canyon, 7,600 ft. 

 (AMNH); Phoenix (AMNH); Prescott (AMNH); Santa Rita Mts. (USNM). 



Mexico: Durango: Tepehuanes (TLCC). Mexico: 23 miles south of Toluca 

 (DGK). Puebla: 10 miles east of Puebla, 7,400 ft. (CIS). 



Biology: Material in the U. S. National Museum from Mt. Adams, 

 Wash., and Orenco, Oreg., was reared from lupine seed pods. In the 

 California Insect Survey Collection there is material associated with 

 Lupinus sp. 



The geographical distribution of this species may seem unusual. 

 Goldman (1951) classifies the Mexican localities as Upper Austral in 

 character. Fall (1898) suggests that this species may range northward 

 along the coast to Alaska but no material was seen from that area. 



A small series from near Jacobs Lake, Coconimo Co., Arizona, ex- 

 hibits an interesting aberration of the male secondary sexual charac- 

 ters. The front tibiae bear a minute but distinct mucro. While it is 

 possible that this series represents another species it does not seem to 

 because the principal characters of the male and female are those of 

 this species. 



Remarks: Regarding the synonymy, A. crassinasum has line pri- 

 ority over A. proclive; they were described on the same page. Fall 

 (1898) noted that the types represented male and female of the same 

 species and chose to use proclive instead of crassinasum because "I 

 have chosen to supress the latter name as being less characteristic of 



