376 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



' In the following key to the species of Renocis the chief considera- 

 tion has been to make it useful in the ready separation of the species, 

 rather than to attempt to express genetic relationships. If the latter 

 purpose were to be considered of primary importance, it is felt that 

 such species as heterodoxus^ commixtus^ brittaini, criddlei, and hrun- 

 neus should perhaps be placed closer together. With these probable 

 relationships ignored it is believed that a more workable key has 

 resulted. 



KEY TO THE SPECIES OF RENOCIS CASEY 



1. Frons of female feebly to moderately impressed or concave, that 



of male more strongly concave ; disk of elytra with median 

 row of long erect setae in each interspace; declivity im- 

 pressed or sulcate in sutural region 2 



Frons of female flat, that of male strongly, broadly concave: 

 elytra with median row of setae in each interspace erect, but 

 short, wide, and often scalelike ; declivity not impressed or 

 sulcate in sutural region 11 



2. Base of pronotum procurved or deeply, broadly emarginate; 



elytral declivity strongly sulcate between the elevated third 

 interspaces, with median rows of setae much reduced or lack- 

 ing in first and second interspaces 3 



Base of pronotum procurved or shallowly emarginate; elytral 

 declivity impressed or weakly sulcate in sutural area, with 

 median rows of setae present in all interspaces 5 



3. Large and stouter, about 1.7 times as long as wide; antennal 



club (fig. 17, 6, c) very large and slender, 3 times as long as 

 wide, distinctly longer than scape and funicle combined ; pro- 

 notum with 3 groups of small, slender asperities at each side ; 

 anterior margins of elytra strongly elevated and serrate with 

 median portion displaced posteriorly; declivity deeply and 

 broadly sulcate, with setae in Interspaces 3, 5, 7, and 9 more 

 numerous, very large, terete; foretibia (fig. 18, a, 6) with 



9-14 teeth parkinsoniae, new species (p. 378) 



Smaller and less stout, at least 1.8 times as long as wide; 

 antennal club (fig. 17, d) shorter than scape and funicle com- 

 bined, less than 2.5 times as long as wide ; pronotum with 2 

 groups of sharp asperities at each side ; anterior margins of 

 elytra strongly elevated and serrate, forming a continuous 

 line ; declivity broadly shallowly sulcate, with setae except 

 in interspaces 1 and 2 moderately larger, spatulate ; foretibia 

 with fewer, slender teeth (fig. 18, c) 4 



4. Frons with a low, granulate tubei'cle at each side of median 



line; pronotum with dark-brown scales forming a diamond- 

 shaped median marking and an oblong spot at each side of 

 disk; elytra with sutural light stripe and alternate fasciae 

 of brown and of white scales; body form twice as long as 



wide maclayi (Bruck) (p. 382) 



Frons with sides finely granulate-punctate, without tubercle; 

 pronotum with cinereous and light-brown scales, the latter 

 forming an oblong spot at each side of disk ; elytra with uni- 



