BEETLES OF THE GENUS RENOCIS — BLACKMAN 389 



Both the males p.nd females show some degree of variation. The 

 size ranges from 1.5 to 2.4 mm. long. The color pattern varies con- 

 siderably, being dependent upon differently colored scales and setae 

 against the background of the actual body color and upon the 

 relative abundance and arrangement of the differently colored scales. 

 As is usually true in various species of Renocis, the pronotal asperi- 

 ties or teeth are better developed in the female than in the male, 

 but in each sex there is considerable variation. The type, a male, 

 shows little indication of frontal tubercles, although the frontal 

 hairs are partly abraded and if present the tubercles would be plainly 

 seen. This seems to be true of most of the specimens of both sexes, 

 although a few of each sex do show more or less feebly developed 

 tubercles or large granules. Usually, however, these structures, unless 

 exceptionally large, are well concealed by the frontal hairs. 



Ti/pe locality. — Reno, Nev. 



Type.— Casey collection, U.S.N.M. No. 37439. 



Specimens studied by the writer include the type from Reno, Nev., 

 specimens from Blacksmith Fork Canyon, Logan Canyon, Park City, 

 and Dixie National Forest, Utah; Bray, Calif.; and Neil Creek and 

 Ashland, Oreg. The recorded hosts are Amelanchier f.orida Lindley, 

 Cercocarpus hetuloides Nuttall, C. alnifollus Rydberg, C. ledlfoliwi 

 Nuttall, and Prunus virginiana melanocarpa (A. Nelson) Sargent. 



RENOCIS BRUNNEUS, new specif 



FiGTJBES 17, i; 18, 1 



Female. — Light reddish brown, clothed with cinnamon-brown and 

 with light-cinereous scales; 1.7 to 2.17 mm. long.; holotype 2.1 mm. 

 long, 1.96 times as long as wide. 



Frons with epistomal margin bearing a sharp point in median line, 

 with a fringe of moderately coarse, yellowish setae covering two- 

 thirds of the mandibles ; arcuately, transversely impressed above the 

 epistoma, the impression somewhat widened in median area to upper 

 angle of eyes (not extending dorsally as far as in most species) ; 

 surface reddish brown, shining, the concavity finely punctate, the 

 sides and dorsum densely, finely granulate-punctate; with a feeble 

 elevation (tubercle) at each side at level of upper angle of eye; 

 surface of concavity partly concealed by moderately short, coarse, 

 light-brown setae, that of the lateral and dorsal elevations almost 

 entirely concealed by more numerous longer ones. Ej^e approxi- 

 mately 3 times as long as wide, finely granulate, the inner line 

 broadly, shallowly sinuate. Antenna with club (fig. 17, ^) 2.25 times 

 as long as wide, as long as the remaining visible part of antenna, 

 with three sutures marked by annuli and rows of setae. 



