256 RHYNCHOPHORA. 
male and the obliquely truncated humeri (which are therefore less prominent); the fifth 
-ventral segment of the male, moreover, is transversely flattened or depressed at the apex 
only, instead of being shallowly sulcate down the middle. Compared with O. mexicanus, 
the present species is more elongate and has a longer antennal club. 
49. Otidocephalus tenuirostris, sp. n. 
Elongate, shining, black, the antenne ferruginous; the head and rostrum clothed with short blackish, and 
the prothorax with a few, very fine, long, white, hairs, the elytra with a scattered row of long, erect, 
blackish sete: on each of the dorsal interstices, these being intermixed with some white hairs at the tip, 
the vestiture of the scutellum and under surface white, the legs with intermixed white and blackish 
hairs. Head rather coarsely punctate, longitudinally wrinkled between the eyes, which are moderately 
large, widely separated, and not prominent; rostrum distinctly longer than the prothorax, not very stout, 
smooth along the middle, punctato-sulcate at the sides; antenne long and slender, joint 2 of the funiculus 
slightly shorter than 1, 2-6 longer than broad, 7 much stouter than 6, as broad as long, the club ovate. 
Prothorax long, subcylindrical, narrowed behind, sparsely, irregularly punctate, a space on the flanks 
impunctate. Elytra elongate, much wider than the prothorax, widening to beyond the middle, moderately 
convex, compressed at the sides, flattened on the disc anteriorly and depressed near the suture, truncate 
at the base, the humeri obliquely cut off in front; very finely seriate-punctate, the setiferous interstitial 
punctures very minute. Legs long; femora each with a small triangular tooth; anterior tibiv strongly 
sinuate within. 
Length 72, breadth 2? millim. (Q.) 
Hab. Mexico, Playa Vicente (Sadlé). 
One female specimen. A close ally of O. vicinus, differing from the corresponding 
sex of that species in the long rostrum, slender funiculus, with thickened seventh 
joint, &c. The thickened terminal joint of the funiculus distinguishes 0. tenuirostris 
from the same sex of the still more nearly related O. apioniformis. 
50. Otidocephalus compressus, sp. n. 
Moderately elongate, black, shining ; clothed with long, erect, blackish setee, which on the elytra are arranged 
in a single row along each interstice, the base of the prothorax with a few fine white hairs, the vestiture 
of the scutellum and under surface white, the legs with intermixed white and blackish hairs. Head 
sparsely punctate, obsoletely foveate between the eyes, which are moderately large, not prominent, and 
widely separated ; rostrum stout, much shorter than the prothorax, punctato-sulcate at the sides, smooth 
along the middle; antenne with joint 2 of the funiculus very little longer than 3, the club oblong-ovate. 
Prothorax long, subcylindrical, slightly narrowed behind, sparsely punctate, a space on the flanks impunc- 
tate. Elytra moderately long, much wider than the prothorax, compressed at the sides, somewhat gibbous 
posteriorly, gradually widening to the middle, subtruncate at the base, the humeri rounded externally ; 
finely seriate-punctate, the interstices cach with a row of fine scattered punctures. Fifth ventral segment 
emarginate at the apex. Femora each with a small triangular tooth. Anterior tibiee feebly sinuate within. 
Length 52-64, breadth 2;4,-23 millim. (<.) 
Hab. Nicaragua, Chontales (Belt). 
Two specimens. This insect agrees in many respects with the male of 0. apioniformis, 
but has both the rostrum and elytra much shorter, and the fifth ventral segment unim- 
pressed along the middle. The elytra are less widened at the base and more convex 
than in O. oculatus, and the humeri are a little more prominent and less obliquely 
truncated than in O. mexicanus and O. similis. 
