﻿MELOLCWTHIDiE OF THE UNITED STATES, 283 



spurs ; posterior thighs very large, posterior tibiae like the middle ones, but much 

 thicker. Tarsi twice as long as the tibiae, slender, with verticillate hairs at the articu- 

 lations ; last joint with two long terminal hairs above ; ungues long, slender, diverging 

 onychium hardly visible, bisetose. 



I have given to this genus an unpublished name proposed by Dejean for Aclopus 

 Erichson, to which genus this seems to bear a remarkable resemblance in form. The 

 labrum and mandibles are however entirely invisible. I regret that I cannot give 

 the position of the abdominal stigmata, but conclude that they must be very much as 

 in the next genus. 



1. L. ferrugineus, valde elongatus ovalis, nitidus ferrugineus, capite punctato, clypeo parce punctato, 



thorace minus dense insequaliter punctato, ad basin laevi, antice subcanaliculato, lateribus longe fimbriatis, 



elytris parce punctatis, punctis subseriatis extrorsum confusis, breviter parce pilosis, margine fimbriatis ; 



subtus et pedibus parce longe pilosis. Long. -19. 



Ringgold Barracks, Texas. We owe this most interesting addition to our fauna to 



the scientific industry of Mr. H. Haldeman. The genus will be readily recognized 



by the narrow oval body, fringed with long hairs, and by the long hairs of the legs, 



and the thickness of the posterior femora and tibiae. 



Oncerus Lee. 



Clypeus duplex ; mentum trapezoideum barbatum ; pedes postici incrassati ; ungues fissi. 



The only species of this genus known to me is the smallest of the tribe that I have 

 seen, and presents such a curious assemblage of characters that I am at a loss which 

 to select. The form might be compared to a Hoplia, oblong and more narrowed in 

 front ; the body is shining, sparsely hairy, especially beneath. The head is narrow 

 with convex prominent eyes, the clypeus prolonged, flattened, parallel on the sides, 

 rounded slightly at the apex and incised each side, with a deep transverse concave 

 suture between the incisions ; the frontal suture is straight and deep, running between 

 the antennae which are short ; the first and second joints are thick and hairy ; then 

 follow four small joints, and then a small three-jointed club concave outwards ; the 

 mentum is large, flat, trapezoidal, wider in front, with long scattered hairs ; the bases 

 of the maxillae are long, slender and prominent each side of the mentum ; the maxil- 

 lary palpi are slender, penultimate joint small, last joint elongate, slightly oval ; labial 

 with the last joint longer than the preceding, slightly oval. Thorax wider than the 

 head, rounded on the sides, and gradually narrowed in front. Elytra a little wider 

 than the base of the thorax, oblong, slightly flattened on the disc, with the sutural 

 stria fine. Pygidium slightly exposed. Legs strong, hairy, anterior tibiae subbiden- 

 tate ; middle tibiae conical, moderately thick, with a crown of short spines at the 

 middle externally, and two apical spurs. Posterior thighs very large, tibiae thick 

 conical, with a crown of spines externally about one-third from the tip, and two apical 



