NORTH AMERICAN RUPRESTID BEETLES 147 



Male. — Usually more slender than female, front of head slightly 

 flatter, narrower, bronzy green, becoming brownish cupreous on occi- 

 put, about equal in width at top and bottom, lateral margins more 

 arcuately expanded at middle, and the surface vaguely granulose; 

 ej^es more broadly elongate ; first abdominal segment feebly flattened 

 at middle, and the second with a broad, feebly depressed, smooth 

 groove on anterior half; last segment broadly subtruncate at apex; 

 tibiae with a small tooth on inner margin at apex, those on posterior 

 pair often indistinct; posterior tarsi slightly shorter than tibiae, and 

 the first joint about equal in length to the following three joints 

 united ; tarsal claws on anterior and middle feet cleft one-third from 

 tip, and the teeth nearly equal in length, those on the posterior feet 

 cleft near middle, the inner tooth shorter than outer one, feebly 

 turned inward, but the tips distant. 



Redescribed from the female lectotype No. 3480 in the Academy of 

 Natural Sciences of Philadelphia. 



Type locality. — Los Angeles, Calif. 



DISTRIBUTION 



Material examined: 



Arizona: Near Yuma ( ). 



California: Los Angeles County (Coquillett). 



Ventura County, May 31 (A. D. Hopkins). 



Colton, April 22, 1879 (Riley collection). 



Gilroy (L. S. S'-evin). 



Pomona (Stromberg collection). 

 Nevada : No definite locality. 

 Utah: Bellevue, June, and Zion Canyon, June (W. Knaus). 



Variations. — This species is rather uniform in color, but some ex- 

 amples are slightly more shining and have a slightly more purplish 

 tinge on the elytra. The pubescent spots on the elytra are indistinct, 

 in most cases only the preapical spot is present, and frequently there 

 are a few hairs extending along the sutural margin near the apex. 

 In carefully collected specimens the sides of the pronotum have a 

 white efflorescence, and the sides of the body beneath seem very 

 densely pubescent due to this efflorescence between the hairs. This is, 

 however, so easily lost, that in most examples it is missing. The tooth 

 on the tibiae is quite variable in length, sometimes it is quite distinct, 

 and again scarcely noticeable, and sometimes it is feebly indicated on 

 the anterior tibiae of the females. In most cases the prosternal lobe 

 is broadry rounded in front, but occasionally a specimen is found 

 in which it is feebly, arcuately emarginate. Length 6.5 to 10 

 millimeters. 



Hosts. — Reared from dead Western Black Willow (Salix lasiandra, 

 Bentham) in California by A. D. Hopkins. The adults were found 



