RKETLES OF THE GENUS RENOCIS BLACKMAX 397 



RENOCIS MEXICANUS, new species 



FiG-UKES 17, n; 18, fc 



Female. — Black, clothed with piceous-brown scales forming a varie- 

 gated color pattern with light cinereous, nearly white scales; 1.31 

 to 1.88 mm. long ; holotype 1.72 mm. long, 2.0 times as long as wide. 



Frons with a sharp median point on epistomal margin, and with 

 a dense fringe of moderately fine, yellow-cinereous setae extending 

 lialf way to tips of mandibles ; transversely impressed above epistoma, 

 with center of frons flattened, feebly concave, sides and vertex con- 

 vex ; surface black, feebly shining, very finely and densely granulate- 

 punctate; surface mostly concealed by coarse, rather short, fuscous 

 setae, only slightly longer at sides and above. Eye finely granulate, 

 about 3.3 times as long as wide, the inner line broadly and shallowly 

 emarginate. Antenna (fig. 17, n) with club very large, longer than 

 the scape and funicle combined, 2.19 times as long as wide, with three 

 nearly straight sutures, both annuli and setae reduced in median line 

 of outer face of club. 



Pronotum 1.47 times as wide as long, widest near base, which is 

 broadly procurved; sides strongly arcuate, nearly evenly narrowed 

 anteriorly with front margin very broadly rounded, feebly sinuate in 

 middle, with a very feeble, transverse impression just back of the 

 margin; surface piceous, feebly shining, finely and densely granu- 

 late-punctate; at each side with two very inconspicuous groups of 

 several slightly coarser granules (not sharp asperities as in other 

 species of Eenocis), almost entirely concealed except in abraded 

 specimens; surface largely concealed by numerous scales, some of 

 them narrow, recumbent ones and some wide and semierect, mostly 

 piceous except for a transverse, basal band and a lateral border of 

 light-cinereous scales; anterior margin with a sparse fringe of erect, 

 dark brown, spatulate setae, interrupted in the middle. 



Elytra 1.43 times as long as wide, slightly wider than pronotum; 

 sides straight and subparallel on anterior two-thirds, rather narrowly 

 rounded behind; basal margin strongly elevated from suture to 

 opposite sixth interspace, with 8 distinct teeth in a continuous line 

 on margin of each elytron, and with a second row of four coarse 

 teeth, two at each side of suture, just behind margin; striae, except 

 first, rather feebly impressed, punctures moderate in size, close ; inter- 

 spaces wider than striae, feebly convex, rugose, finely punctate, with 

 a few small granules; surface partly concealed by small recumbent 

 scales, most of them piceous, but with a narrow stripe of light- 

 cinereous scales in anterior half of sutural interspaces and continued 

 posteriorly as a single row of light scales next to suture, at each side 

 an irregular spot of light scales in anterior half of fifth to seventh 

 interspaces; in median line of each interspace a row of very broad. 



