March, I9i8.] LeNG : A Nf.W PiEZOCORYNUS. 11 



DESCRIPTION OF A NEW SPECIES OF 

 PIEZOCORYNUS. 



By Charles W. Leng, 

 New York, N. Y. 



Piezocorynus virginicus new species. 



Oblong, thorax narrower in front, as wide as the elytra at base, sides 

 straight and oblique, body rounded behind with parallel sides ; dark brown, 

 legs and antenna; with paler bands, pubescence irregularly condensed in pale 

 spots especially towards sides of elytra. Head nearly black, finely confluently 

 punctured, punctures forming fine transverse rugae on the occiput ; irregularly 

 and sparsely clothed with short yellow hairs. Antenna shorter than the body 

 in the female (male not seen), slender with a loose, three-jointed, flattened 

 club; basal joint short and stout, pale; second joint longer, elongate, conical; 

 joints three to seven very slender but each thickened apically ; joint eight 

 elongate, triangular; joints nine to eleven wider and fringed with hairs, nine 

 strongly triangular, black, emarginate at apex, ten wider than long, black, 

 obliquely emarginate at apex, eleven elongate-oval, pale. The joints two to 

 eight are each paler apically. Thorax as long as its basal width, tapering 

 obliquely to about half as wide at apex, finely granulate, the basal ridge 

 finely elevated, forming an acute angle at its extremities with the acute 

 lateral margin, which extends nearly to the apex ; disk without elevations or 

 channels; a few yellow hairs are seen above, sometimes feebly condensed 

 into spots, more at the sides, and enough beneath to clothe the surface fairly 

 thickly. Elytra parallel, with rows of distant punctures, punctuation how- 

 ever obscured by dense pubescence, of which the yellow hairs are usually 

 concentrated at the sides and apex, leaving the disk darker. The elytra are 

 conjointly rounded at apex. Body beneath and abdomen clothed rather 

 sparsely with pale hairs. Length 3.25-5.00 mm. 



Btickingham county, near Wingina, Virginia. 



Described from fifteen specimens collected by Col. Wirt Rol)inson, 

 July 12, 1917, ovipositing on a recently killed black oak, and four 

 specimens collected from the same tree by Wm. T. Davis. 



This species resembles P. dispar in the oblique emargination of 

 the joints of the antenna! clul), but differs in the more strongly tri- 

 angular form of the joints of the club and in their marginal hairs. It 

 also lacks the thoracic elevations of dispar; the yellow pubescence of 

 the elytra is differently arranged, being concentrated on the disk in 

 dispar, on the sides in z'irgiiiiciis. ^Tr. Davis has pointed out further 



