250 RHYNCHOPHORA. 
and apex, a space on the flanks impunctate. Elytra convex, somewhat flattened on the disc towards the 
base, nearly three times the length of, and much wider than, the prothorax, widening to the middle, 
and there twice its width, the humeri rounded externally and obliquely truncated in front ; very finely 
seriate-punctate, the dorsal interstices each with a scattered row of fine punctures, Fifth ventral segment 
flattened and closely punctate atthe apex, and also with the apical margin emarginate in the middle, in 
the ¢. Femora each with an exceedingly large, broad, triangular tooth. Anterior tibiee strongly sinuate. 
within. 
Length 8, breadth 3-34 millim. (¢ 2.) 
Hab. Muxico, Sierra de Durango? [2] (ex coll. Flohr); Costa Rica [6] (Van 
Patten ; Wagner, in Mus. Berol.). | 
Two males and one female. In this species the femoral tooth reaches the maximum 
development. The elongate elytra separates O. lonyipennis from most of its allies 
with a large femoral tooth, the general shape being like that of O. apioniformis. 
38. Otidocephalus tonsilis, sp. n. 
Elongate, narrow, subconical, black, shining ; clothed with scattered, long, erect, blackish sete, which on the 
elytra are arranged in a single series along each interstice, the base of the prothorax with a few long 
white hairs, the vestiture of the scutellam and under surface white, the legs with intermixed white: and 
blackish hairs. Head sparsely punctate, the eyes moderately large and widely separated; rostrum 
shorter than the prothorax, closely punctato-suleate (3), or punctato-sulcate at the sides and smooth 
along the middle (@); antenne with joint 2 of the funiculus slightly longer than 3, 3-7 short, the club 
ovate. Prothorax long, convex, narrowed in front and behind, sparsely punctate, the punctuation 
becoming closer at the base and apex, a space on the flanks almost or quite smooth. LElytra elongate, a 
little wider than the prothorax, moderately convex, flattened on the dise at the base, gradually widening 
to the middle, the humeri obtuse; finely seriate-punctate, the interstices each with a scattered series of 
minute punctures. Legs moderately long; femora each with an exceedingly large, triangular, acute 
tooth ; anterior tibia in the ¢ curved externally and strongly sinuate within, straighter in the 2. 
Length 53-6, breadth 2 millim. (d 2.) 
Hab. Guatemata (Sallé, in Mus. Dresden), Capetillo (Champion). 
Very like 0. prolongatus, but with the prothorax less cylindrical and smoother, the 
‘second joint of the funiculus shorter, the elytral interstices each with a row of sete, 
the anterior tibis more curved in the male. The male has the head, rostrum, and 
prothorax more coarsely punctured than in the female, and the fifth ventral segment 
unemarginate at the tip. Three specimens. 
39. Otidocephalus dentipes, sp. n. 
Moderately elongate, robust, black, shining; clothed with widely scattered, long, erect, blackish sete, which 
on the elytra are arranged in a single series along each of the alternate dorsal interstices, the base of the 
prothorax, the scutellum, legs, and under surface with white hairs, the legs with a few blackish ones 
intermixed. Head sparsely punctate, almost smooth and faintly suleate between the eyes, which are 
moderately large and widely separated ; rostrum stout, curved, much shorter than the prothorax, a little 
longer and smoother in the 2, punctato-sulcate at the sides and sparsely punctate or smooth along the 
middle. Prothorax long, convex, narrowed in front and behind, very sparsely punctate, the flanks almost 
smooth. Elytra much wider than the prothorax, very convex, flattened on the dise at the base, rapidly 
widening to the middle, the humeri obliquely truncated in front; very finely seriate-punctate, the 
alternate dorsal interstices each with a row of scattered minute punctures. Fifth ventral segment feebly 
