LeContc.] 



HYLURGLNT. 375 



Head but slightly prolonged in front of the eyes, which are large Iran-- 

 verse, rather finely granulated, slightly eniargiuatc at the insertion of tlie 

 antennae. Antenna; inserted at the sides, scape long, slender, curved, 

 funicle 5-joiiited, first joint stouter, a little longer than wide ; 2-5 slender, 

 closely united, attached to the side of the club, which is very large and 

 strongly compressed, pubescent on bo 111 sides, not marked with sutures ; 

 the lower edge is nearly straight, the upper is curved and sinuate, and 

 each end is obtusely rounded. Ventral surface moderately convex, sutures 

 straight, well impressed, first and second segments a little longer. Til>i;t- 

 dilated, finely serrate on the outer side and at the tip, which is broadly 

 rounded; apical spine at the inner angle short ; tarsi with joints 1-3 short, 

 fourth small, but distinct ; fifth as long as the others united, with large 

 simple divergent claws. 



Bristles long, scales of elytra sparse 1 . icorise. 



Bristles short, scales dense 2. Chapuisii. 



1. O. icoriae Lee., Tr. Am. Ent. Soc. 1868, 168; Rhopalopleurus Le- 

 contei Chapuis, Mem. Soc. Roy. Sc. Liege, 1869. 



(5\ Head deeply concave. 



9 . Head flattened, with a feeble curved impression. 



Middle and Western States, in hickory twigs. The present is an excel- 

 lent example of the uncertainty of entomological descriptions. In the 

 memoir above cited, I described the funicle as having but one distinct 

 joint, "the remaining joints are obsolete, and visible only as a corneous 

 ridge on the upper edge of the base of the club," which, in fac:, was the 

 appearance presented by all ths specimens in my cabinet. But on receiv- 

 ing the memoir of my friend, Dr. Chapuis, suspecting that I might have 

 made an error by neglecting to observe the antennae in all directions, I re- 

 laxed some specimens, and was greatly pleased to find that the very extra- 

 ordinary character upon which he had founded Rhopalopleurus really 

 exisied in my species. The other characters given in my detailed descrip- 

 tion above cited are, however, so characteristic, that the genus might have 

 been recognized, without reference to the antennal funick-; apart of the 

 body, which, as I have said above, I believe to ba of but little valuj in t'.ie 

 classification of these insects. Length 1.5 mm.; .06 inch. 



2. O. Chapuisii n. sp. 



Oval, robust, convex, black, with the antennse testaceous, precisely as in 

 G. icoricB, and differing from it only by the interspaces of the elytra being 

 densely clothed with small thick scales, and single rows of rather short 

 bristles, and by tli3 striae being narrower and finely crenulate, instead of 

 coarsely punctured. Length 1.5 mm.; .06 inch. 



One ^ Louisiana. The front is triangularly flattened and marked with 

 a fine curved line, at the middle of which is a small transverse fovea. 



POLYGRAPHUS Er. 



In this genus the body is less robust, and of the usual cylindrical form, 

 narrowed in front, and rounded behind, as seen in Ilyleiinui. The 



