COLEOPTKRA. 117 



strong ; surface j)olislie(l, inii)unctate ; first segment without dorsal earinae. 

 Legs slender, translucent ; tarsi short, basal half abruptly much more 

 robust than the apical joint ; claw minute. Length O.C-O.S mm. 



New Orleans, 1 ; Taoi pa, Florida, 2 ; Columbus, Texas, 4; Detroit, 

 Michigan, 5. 



The parallel sides of the protliorax and very small size will serve 

 to identify this species. The lateral impressions of the pronotum are 

 joined to the middle ones by what appear to be very narrow sharply 

 defined carinae, but these may be grooves, the optical appearance of 

 both being nearly the same. 



To this form I have united E. integer Lee. (Proc. Am, Phil. Soc. 

 XVII, p. 386) which was described from a unique, and which is pre- 

 cisely similar to the southern forms; the specimen is in much better 

 preservation than the unique type of rujiceps, and the pubescence is 

 much more abundant ; it appears to be easily rubbed from the surface 

 of the elytra. 



THESIIJIM n. gen. 



The principal characters of this genus have been given in the 

 table ; the subsidiary and more minute ones can be readily discovered 

 from the descriptions of the two species given below, and which may 

 be distinguished as follows : — 



Color reddish-brown ; median canalicular puncture of pronotum much 

 elongated 1, cavifrons. 



Color piceous-black, elytra reddish ; median puncture of proimtum very 

 small, near the apex, and very sliglitly elongated 2. laticolle* 



1. T. cavifrons (Lee.)— £•«. cm: Lee. N. Sp. Col. L 1863, p. 28.— Form 

 robust. Pubescence rather long, evenly distributed, coarse, very pale and 

 somewhat conspicuous ; color throughout dark reddish-brown, antennae and 

 legs but very slightly paler. Head rather small, broader than long ; eyes 

 large, coarsely granulated, moderately prominent, more convex behind ; 

 genae very small, nearly transverse, scarcely more than one-half as long as 

 the eyes and continuous in curvature with them ; frontal margin not one- 

 half as long as the width across the eyes ; interocular surface rather strongly 

 and abruptly elevated above the eyes, feebly convex above, highly polished 

 and impunctate, having at two-fifths the length from the base two very small 

 circular feebly impressed spongy-pubescent foveae, connected by a parabolic 

 channel shorter than the distance between them, and, in their vicinity, very 

 feeble but becoming just behind the frontal ridge very deeply impressed; 

 intermediate surface feebly and nearly evenly convex ; supra-antennal tuber- 

 culations strong, angulate externally, connected by the short transverse and 

 prominent frontal ridge ; labrum prominent, four times as wide as long, 

 nearly transversely truncate anteriorly, sides parallel and very strongly 



