150 CURCULIOXID^E. 



[LeConte. 



rather wider than iu C. coUaris, and the third joint is more distinctly bi- 

 lobed, with a portion of each lobe sjjongy beneath. The same character is 

 seen in C. tmittatus. 



4. O. frontalis, n. sp. 



Black, densely punctured, head sparsely, beak coarsely punctured, the 

 latter uniformly pubescent with yellowish-gray hair, cylindrical, obsolotely 

 carinate, broadly concave transversely at base ; prothorax not longer than 

 wide, gradually narrowed and feebly rounded from the base, which is bi- 

 sinuate, with the middle lobe acute, tip -not constricted, feebly impressed 

 at the sides ; disc with four broad stripes of pubescence, and with scattered 

 very coarse punctures, not distinctly carinate, basal impi'essions oval, not 

 very deep. Elytra with three broad basal impressions, humeri rounded, 

 sides parallel, striae composed of large distant punctures ; densely clothed 

 with moderately fine yellowish -gray pubescence, Avith a broad sutural and 

 another discoidal stripe more thinly pubescent, speckled with denser spots. 

 Beneath similarly pubescent, thickly speckled with black. Length 9 mm. ; 

 .86 inch. 



"Wyoming Territory, Dr. W. A. Hammond; Nevada, Dr. Horn. Smal- 

 ler and more slender than G. trwittatws, and quite distinct by the above 

 characters. The third joint of the hind tarsi is rather bilobed than emar- 

 ginate, and is spongy at the tip of the lobes. The frontal concavity is 

 broad and vague, and separates the head from the beak. 



One specimen has the beak distinctly carinate, and the frontal im]n'ession 

 much deeper, but does not otherwise differ. 



5. O. virgatus, n. sp. 



Black, densely punctured, head sparsely, beak coarsely punctured, tliinly 

 pubescent, sub-carinate, with a broad transverse frontal impression ; pro- 

 thorax a little longer than wide, 4-vittate with pubescence, gradually nar- 

 rowed from the base, scarcely rounded on the sides, very coarsely cribrate, 

 finely carinate, basal impression veiy feeble, base deeply bisinuate, middle 

 lobe acute. Elytra without impressions, striaj composed of large equal not 

 distant punctures, tolerably densely pubescent, with the second, sixth, and 

 eighth interspaces thinly pubescent, and therefore darker. Beneath rather 

 coarsely pubescent and speckled with black. Length 7 mm.; .28 inch. 



One specimen, Owen's Valley, California, Dr. Horn. The third joint of 

 the hind tarsi is bilobed, and spongy beneath, but is shorter than the second 

 joint. 



6. C. quadrilineatus. Apleitrusqjuidr. Chevrolat, Mem. Acad. Liege, 

 2d ser. v. 80. 



Texas. In this species the pubescence is fine, the beak stouter and shorter, 

 feebly carinate, with a small frontal fovea, the upper surface densely luibes- 

 cent, the sides black. The prothorax very coarsely and sparsely punctured, 

 the interspaces finely punctulate; the disc is dark, Avith the sides and two nar- 

 row lines converging in front cinereous; base broadly impressed at the mid- 

 dle, oblique each side, not acute at thescutellum. Elytra rather finely punc- 



