OTIDOCEPHALUS. 247 
somewhat coarsely punctate-striate elytra, the erect blackish setosity intermixed with 
rather coarse scattered white hairs, the latter becoming more numerous on the apical 
declivity ; the frontal fovea is small or absent; and the femoral tooth is large and 
triangular. The absence of the deep frontal fovea separates it at once from 0. fover- 
frons and O. cavifrons, which are otherwise very similar. Six specimens from 
Chilpancingo and two from Navarrete, the latter much larger than the rest. 
31. Otidocephalus cavifrons, sp. n. 
Moderately elongate, shining, black, the antenne and tarsi piceous or rufo-piceous; sparsely clothed with 
long, suberect, white hairs, the elytra with a few long, erect, serially arranged, blackish sete intermixed 
with numerous scattered, bristly, white hairs, which are a little more closely placed towards the apex, 
the vestiture of the scutellum and under surface white, the legs with intermixed white and blackish 
hairs. Head very sparsely punctate, deeply foveate between the eyes above, and slightly constricted 
behind them, the eyes moderately large and widely separated ; rostrum much shorter than the prothorax, 
punctato-sulcate at the sides, smooth along the middle, depressed at the base above. Prothorax long, 
convex, narrowed in front and behind, coarsely, sparsely punctate. Elytra moderately long, convex, 
much wider than the prothorax, widening to the middle, subtruncate at the base, the humeri obtuse : 
coarsely punctate-striate, the interstices flat or feebly convex, minutely uniseriate-punctate. Fifth 
ventral segment obsoletely emarginate at the apex in the ¢. Femora each with a large triangular tooth. 
Anterior tibiz strongly sinuate within. 
Length 4-5, breadth 13-2 millim. 
Hab. Mexico, Misantla, Oaxaca (Hoge), Cuesta de Misantla (Flohr, in Mus. Berol.), 
Playa Vicente, Parada (Sal/é); Guatemata, Panzos (Conradt), Cahabon, Capetillo 
(Champion). 
Separable from O. foveifrons by the less numerous white hairs on the elytra and 
the erect setosity ; and from O. setiger by the deeply foveate head and the sparser 
setosity. ‘Thirteen specimens. 
32. Otidocephalus canus. 
Otidocephalus canus, Chevr. Aun. Soc. Ent. Fr. 1877, p. 176°. 
Hab. Mexico, Toxpam, Juquila (Sallé), Oaxaca (coll. Chevrolat 1), Motzorongo 
(coll. Becker), Cuesta de Misantla (Mohr, in Mus. Berol.). 
This small species may be recognized by the inflated, comparatively short, broad 
elytra, which are obsoletely or finely seriate-punctate, and clothed with long, erect, 
scattered, rather coarse, white hairs, intermixed with long blackish sete on the disc, 
the hairs becoming much more numerous on the apical declivity; the almost smooth 
supra-ocular portion of the head; the basally depressed rostrum; and the large, acute, 
triangular, femoral tooth. 
The specimens from Motzorongo, in Mr. Becker's collection, agree with the type, 
now before me, and three others in the Sallé collection and one in the Berlin Museum 
probably belong to it, but they have the elytra very distinctly seriate-punctate. The 
femoral tooth is larger than in O. senew, and the prothorax and elytra are smoother 
than in O. setiger. 
