OTIDOCEPHALUS. 261 
moderately long, convex, much wider than the prothorax, widening to the middle, the humeri obliquely 
truncated in front; very finely seriate-punctate, the punctures (except those of the first row) widely 
separated from each other, the interstices flat and each excessively minutely uniseriate-punctate. Legs 
elongate; femora each with a narrow, acute tooth; anterior tibize sinuate within. 
Length 34-5, breadth 14-2 millim. (¢ 2.) 
Hab, Panama, Bugaba, Caldera (Champion). 
Amongst its nearest allies the present species may be identified by the large and very 
prominent eyes in the male, the smooth, deeply foveate head, the suberect, long, white 
hairs of the upper surface, the somewhat widely separated seriate punctures on the 
elytra, and the slender femoral tooth. Nine specimens, varying greatly in size. 
60. Otidocephalus similis, sp. n. 
Moderately elongate, black, shining; clothed with scattered, long, erect, blackish sete, which on the elytra are 
arranged in a single row along each interstice, the elytra with a few white hairs at the extreme tip, the 
vestiture of the scutellum and under surface white, the legs with long intermixed white and blackish 
hairs. Head almost smooth, slightly constricted behind the eyes, and deeply foveate between them, the 
eyes prominent, moderately large, and somewhat narrowly separated; rostrum much shorter than 
the prothorax, punctato-sulcate, subcarinate along the middle. Prothorax long, globose in front, much 
narrowed and constricted behind, the surface with a few minute widely scattered punctures. FElytra as 
in O. megalops; obsoletely seriate-punctate, the interstitial punctures very minute. Femora each with 
a long, narrow, acute tooth. Anterior tibie strongly sinuate within. 
Length 33, breadth 13 millim. (2 ?) 
Hab. GuatemaLa, Panima and Chacoj in Vera Paz (Champion). 
This is the Guatemalan form of O. megalops, differing from it in the less abundant 
and blackish setosity of the upper surface, the smaller and less prominent eyes, and the 
longer and stouter femoral tooth. The almost smooth elytra separates O. similis from - 
the other allied species with deep frontal fovea; and the presence of the latter distin- 
guishes it from 0. levipennis and O. longipilis, the femoral tooth also being smaller 
than in the last-named insect. 
61. Otidocephalus albomarginatus. 
Otidocephalus albomarginatus, Chevr. Ann. Soc. Ent. Fr. 1877, p. 177°. 
Moderately elongate, shining, black, the antenne (the club excepted) and tarsi often more or less testaceous ; 
sparsely clothed with long hairs, which on the elytra are white and bristly, intermixed with blackish sete 
on the disc, and arranged in a single series on each interstice, the vestiture of the scutellum and under 
surface white, the legs with intermixed white and blackish hairs. Head sparsely punctate, more or less 
foveate or sulcate between the eyes, which are moderately large and not very widely separated ; rostrum 
stout, shorter than the prothorax, punctato-sulcate at the sides, smooth along the middle. Prothorax 
long, gibbose in front, narrowed and constricted behind, very sparsely punctate. Elytra comparatively 
~ short, much wider than the prothorax, widening to the middle, convex, flattened on the disc at the base, 
the latter subtruncate, the humeri obliquely truncated in front; seriate-punctate, striate towards the 
suture, the interstices flat, and each with a scattered series of very minute punctures. Femora each with 
a small, narrow, spiniform tooth. Anterior tibiee feebly sinuate within. 
Length 3-4, breadth 15-1} millim. 
Hab. Mexico, Toxpam (Sallé), Jalapa, Oaxaca 1, Tapachula in Chiapas (fHége), 
Motzorongo (Flohr), Atoyac (H. H. Smith), Amatan, Tlacotalpam (coll. Becker) ; 
