BEETLES OF THE GENUS RENOCIS BLACKINIAN 393 



with a dense fringe of longer, erect, brown, spatulate setae, shorter 

 in the median line and much longer at each side. 



Elytra 1.4 times as long as wide, slightly wider than pronotum; 

 sides straight and subparallel on basal two-thirds, moderately 

 broadly rounded behind (more narrowly than in heterodoxus) ; basal 

 margins strongly elevated in scutellar region, gradually becoming 

 lower from suture to fifth interspace on each elytron, usually with 6 

 rounded serrations at each side, in a continuous line; striae narrow, 

 impressed, the first more strongly than the others, punctures small and 

 close; interspaces feebly convex, rugose, very finely punctured, each 

 with a median row of larger punctures often accompanying small 

 blunt granules; surface masked by small recumbent scales (not so 

 numerous as in heterodoxus), most of these in type, brown except for 

 a light-colored median stripe in sutural interspaces, while the third, 

 fifth, and seventh interspaces contain many light-cinereous scales in 

 their anterior thirds (some specimens have throughout a "pepper- 

 and-salt" mixture of dark and light scales) ; each interspace with a 

 median row of erect, rather short, coarse setae, most of them brown 

 but a few pale ; each elytron with a dense group of coarse, dark-brown 

 setae just behind the elevated anterior margin. Declivity steeper 

 than in heterodoxus, the first striae impressed but first and second 

 interspaces normal, feebly convex. 



Ventral pubescence light cinerous except on last 3 abdominal seg- 

 ments, most of scales bifurcate or trif urcate ; 3 posterior abdominal 

 segments with entire, coarse, brown, suberect setae ; last segment with 

 erect setae, with posterior margin but little narrower in middle. 

 Foretibia (fig. 18, h, i) with 9-11 teeth on outer margin. 



Male.— ^ma\?iv in habitus to female, with the antennal club (fig. 

 17, h) slightly longer and more slender; frons more strongly concave; 

 pronotal asperities more feebly developed; last abdominal sternite 

 with posterior rim very feebly emarginate and the setae parted in the 

 median line. 



This species shows a considerable range of variation in size (1.6 to 

 2.2 mm. long) , in arrangement of the light and dark scales and setae, 

 and in sculpture, the pronotal asperities especially varying both in 

 number and in coarseness. 



Type locality. — ^Williams, Ariz. 



Additional localities.— Colorndo Springs and North Cheyenne 

 Canyon, Colo. 



Host. — Goioania mexicana D. Don. 



Additional hosts.— Prunus americana Marshall, apple, wild 



currant. 



Type material.— Roloi^^^Q, allotype, and 162 paratypes, U.S.N.M. 



No. 52954. 



