AMERICAN COLEOPTERA. 149 



C.-^Antennal club short with outer joints compressed, and concave. 

 D. terebrans. ^/S'co/jy/M.s- terebrans Oliv. 78, 6; tab. 1, f. 6. — Long. 2i — 3J lin. 

 The color varies, from ferruginous yellow, though all shades of brown, to black, 

 but the club of the antennae and the tarsi are always ferruginous, and the whole 

 body is clothed with yellow hairs; front roughly granulated ; beak emarginate 

 at tip in the middle, and marked with two tubercles; prothorax shorter than 

 wide, narrowed in front, apical margin emarginate, thickly punctured on the 

 disk, sides roughly granulate; elytra short cylindrical, rounded behind, striate, 

 strife and intervals punctured and granulated; tibiae broad with large marginal 

 teeth. — Atlantic States. 



D. hontslis. ^Bostrinhus frontalis Fabr. Syst. El. II, 389. — Long. Ih lin. 

 Brown, head broad, punctured deeplj' channelled, and marked with two frontal 

 tubercles; prothorax broader than long, almost cylindrical, finely punctured, 

 slightly constricted in front, apical margin feebly emarginate: elytra emar- 

 ginate, behind obtusely rounded, strongly striate, intervals thickly and finely 

 granulate-punctured.— Carolina. 



HYLURGTJS Latr. 

 These insects diifer from those of the allied genus Dendrocfonm by 

 the more slender body, by the basal margin of the elytra being neither 

 acutely elevated nor serrate, and by the more distinctly developed beak. 

 The color is black, and only in freshly hatched individuals brown or 

 ferruginous; but the antennae, tarsi, extremity of the tibiae and the 

 front margin of the prothorax are generally ferruginous or brown. 

 The species are distinguished chiefly by the form of the prothorax and 

 the sculpture of the elytra. 



A. — Beak distinctly carinatocl. 



H. scabripennis Zimm. — Long. 2 — 2J lin. As long as the European IT. ater 

 but broader; upper surface glabrous; prothorax a little longer than wide, nar- 

 rower in front, shining, tolerably sparsely punctured, the punctures thicker 

 and finer in front than behind; elytra very deeply striate, the striae are less 

 evidently punctured, but the intervals are very deeply rugose. — Atlantic States. 

 [This species is perhaps S. carhonarius Fitch, Noxious Insects of New York, 

 4th Eeport, No. 249, and is certainly H, porculus Er. Wiegmann's Archiv. 

 1836, i, 49 ; the rostral carina is very indistinct in several of the specimens in 

 my collection. — Lec] 



H. cavernosus Zimm. — Long. 2 — 2i lin. Very similar to the preceding, and 

 of the same size, form and color, but the thorax is longer, more deeply punc- 

 tured, and marked with a distinct smooth dorsal line; elytra ])unctate-striate, 

 the punctures very deep and distinct, the intervals narrow, less deeply rugose. 

 Atlantic States. 



B. — Beak not caiinated. 



H. tenuis. [=ITi/lastes tenuis Blchh. Berl. Ent. Zeitschr. 1868, 147.] — Long. 1 — H 

 lin. Slender, dull black, tolerably thickly clothed with short yellow hairs; 

 prothorax longer than wide, thickly punctured, with a smooth slightly eleva- 

 ted dorsal line; elytra with broad flat striae thickly set with transverse punc- 

 tures, intervals very narrow and elevated. — Atlantic States. 



TRANS. AMER. ENT. SOC. (20) SEPTEMBER, 1868. 



