Coleopterological Notices, III 27 



a large series ; the body is more robust, the femora more clavate, 

 and the antennal joints much more elongate. 



CIIBOTOHA n. gen. 



Body elongate, densely pubescent, the elytra with small denuded spots. 

 Head not quite vertical, the front feebly concave between the antenna?, longi- 

 tudinally and finely sulcate, divided from the epistoma by a rather fine but 

 distinct sulcus ; eyes deeply emarginate, large, coarsely faceted ; palpi slightly 

 unequal, elongate, slender, the last joint elongate, nearly parallel, the apex 

 minutely, transversely truncate ; antennal tubercles slightly and obtusely 

 prominent ; antennae (female) two-thirds as long as the body, the third joint 

 very long, slender, slightly enlarged near the apex, three-fourths longer than 

 the fourth, the latter slightly shorter than the fifth, joints five to eleven sub- 

 equal in length, compressed, the edges very acute, the flat sides feebly swollen 

 along the middle, the apex acutely angulate and very prominent but not 

 spinose internally, tenth joint slightly shorter than the ninth or eleventh, the 

 latter with a small conical apical process. Prothorax without lateral spine 

 and with five dorsal callosities. Scutellum acutely triangular. Elytra with 

 a stout acute sutural spine. Front coxal cavities angulate externally, sepa- 

 rated by a narrow but distinct prosternal lamina. Middle coxae distinctly 

 separated, the cavities open externally. Metathoracic episterna moderate in 

 width, scarcely visibly narrowed from base to apex. Legs short, slender, the 

 basal joint of the hind tarsi rather longer than the two following combined. 



This genus, together with Brothylus and Osmidus of LeConte 

 and Perilasius Bates, constitutes a group of species which is very 

 difficult to treat; they are all allied to the European Hesperophanes. 

 Chrotoma differs from Brothylus and Osmidus in the peculiar elon- 

 gate subparallel form of the last joint of both palpi, and from Peri- 

 lasius, to which it is probably more closely allied, in the slender, 

 almost parallel femora, absence of lateral thoracic spine in the 

 female, and very different disposition of the dorsal callosities, appa- 

 rently also in the form of the terminal palpal joints. 



C dunniana n. sp. — Parallel, moderately, evenly and cylindrically 

 convex, piceous-black throughout, the antennae and legs concolorous, the 

 elytra with a marginal and discal vitta of pale rufo-testaceous, feebly evident 

 through the dense vestiture and which become more distinct toward base ; 

 pubescence moderate in length, coarse, recumbent, very dense throughout the 

 body and legs, pale grayish-white, the small elytral denudations bearing long 

 erect flying hairs, the latter also present rather densely on the prothorax and 

 sparsely on the legs and toward the base of the antennae. Head three-fourths 

 as wide as the prothorax, the antennae clothed with fine recumbent ashy 

 pubescence toward base, which becomes slightly darker and excessively minute 



