276 CUKCULIONIDJE. 



[LeConte. 



channeled, lateral tubercles large, obtuse. Elytra striate, interspaces flat, 

 wide, granulate, slightly mottled with white hairs; an elongate, snow-white 

 sutiiral spot extends from the base for one-third the length. Thighs 

 toothed, claws armed with a small basal tooth. Length 2 mm. ; .08 inch. 



One <j\ Calaveras, California; Mr. Crotch. The last ventral segment is 

 deeply aud widely impressed. A very beautiful and easily recognized 

 species. 



7. O. convexicollis, n. sp. 



Oblong, black, beneath clothed with gray scales, above uniformly densely 

 covered with coarse dirt-colored pubescence. Head densely punctured, 

 beak (9) long, slender, slightly curved, shining; punctured towards the 

 base. Prothorax wider than long, narrowed in front, strongly rounded on 

 the sides, constricted near the tip, apical margin elevated, postocular lobes 

 very feeble; disc coarsely punctured, deeply channeled. Elytra with deep 

 punctured striae, interspaces wide, flat, finely alutaceous. Antennae testa- 

 ceous, funicle slender, second joint longer and more slender than the 

 first. Legs brown, thighs not toothed, claws with a long acute tooth. 

 Length 2 mm.; .08 inch. 



Texas, Belfrage, two $ . Of the same general form as C. rapce, but much 

 smaller, and with a quite different prothorax. 



9. C. pusillus, n. sp. 



Oblong, depressed, dark brown, or ferruginous, clothed beneath with 

 rather small gray scales, above with short rigid pubescence, mixed 

 with similar scales. Head densely punctured, occiput finely carinate; 

 beak slender, punctured, striate at the base. Prothorax wider than 

 long, sides more obliquely rounded behind, suddenly narrowed and 

 constricted in front, apical margin elevated; disc densely punctured, less 

 deeply channeled, with a dorsal line of pale scales; posterior tubercles 

 large, rather acute. Elytra with deep striae, interspaces somewhat wider, 

 slightly convex, sparsely rugose; a basal whitish spot, occupying the space 

 from the suture to second stria. Funicle slender, 7 -jointed; first and 

 second joints longer, the first stouter; club moderate, oval pointed. Legs 

 ferruginous, thighs not toothed, claws with an acute basal tooth. Length 

 2 nun. ; .08 inch. 



(j\ Last ventral segment with a deep, round impression. 



California and Oregon; not rare. Allied to C. convexicollis; differs 

 chiefly by the sides of the prothorax less rounded, the dorsal channel less 

 deep, and the lateral tubercles more acute. The whitish basal spot of the 

 elytra is frequently indistinct; and I have indeed some specimens which 

 have lost the scales of the upper surface, while retaining the pubescence. 

 These present a very deceptive appearance, and look almost as if they be- 

 longed to a different species. 



C a. 



9. O. pusio Mann., Bull. Mosc., 1852, ii, 355. 

 Oblong, depressed, dark brown, beneath densely clothed with small, 



