294 RHYNCHOPHORA. 
One specimen. Near G. scitus and G. viridicans, the prothorax shorter, less 
constricted in front, and with the raised lines on the disc less crowded, the antennal 
club smaller, the prosternum longitudinally sulcate anteriorly ; the vestiture is long 
and hair-like on the prothorax and uniseriately arranged on the elytra. 
68. Gerzus suberatus, sp. n. 
Rhomboidal, rather narrow, black, with a slight brassy lustre ; somewhat thickly clothed with small, narrow, 
brownish-white scales, which are arranged in about two rows down each elytral interstice ; the vestiture 
of the under surface and legs whitish. Head finely punctate, transversely grooved between the eyes ; 
rostrum abruptly bowed from the base, moderately stout, reaching the apex of the metasternum in 
the °, closely punctate-striate in the ¢, much smoother in the 9, the antenne inserted at or near the 
middle, the antennal club stout,.oblong-ovate. Prothorax transverse, arcuately narrowing from the 
base, strongly constricted in front; densely, finely, confluently punctate, the narrow interstices rugiform. 
Elytra subtriangular, rather convex, sharply punctate-striate, the interstices densely rugulose. Beneath 
densely punctate ; first ventral segment deeply excavate down the middle in the ¢. Prosternum sulcate 
anteriorly. Anterior tibie strongly, in the 9 more feebly, unguiculate, somewhat widened at the apex 
in the ¢. 
Length 33-34, breadth 14-12 millim. (¢ @.) 
Hab. GUATEMALA, Calderas on the slope of the Volcan de Fuego 7000 feet 
(Champion). | 
Two specimens, both in worn condition. Near the Mexican G. scitus, but with the 
elytra more rugose and rapidly narrowed from the base, the vestiture finer, the legs 
and antenne infuscate, the antennal club more elongate and with longer basal joint, 
the prosternum (as in G. orichalceus) sulcate anteriorly. The unarmed prosternum in 
the male, the much longer rostrum, the longer antennal club, &c., separate G. suberatus 
from G, furcifer. 
69. Gerzeus bifurcatus, sp.n. (Tab. XVI. figg. 4, 4a, 9 .) 
Subrhomboidal, rather narrow, piceous, the apical half of the rostrum, antenne, tibie, and tarsi more or less 
ferruginous ; densely clothed with narrow whitish and ochreous scales, which are clustered on the elytra 
into three or four close series down each interstice, the prothorax with two partially denuded longitudinal 
spaces on the disc, the elytra each with a sharply-defined, transverse, oblique, interiorly bifurcate, 
blackish-brown fascia at about the middle of the disc; the vestiture of the under surface and legs rather 
sparse and fine, closer on the front of the prosternum. Head finely punctate ; rostrum strongly arcuate, 
slightly longer than the head and prothorax, thickened, punctured, and Squamose at the base, the outer 
half flattened and almost smooth, the antenne inserted at a little behind the middle, the club stout and 
ovate. Prothorax transverse, narrowing from the base, constricted jin front, densely, finely punctate. 
Scutellum small, transverse, almost bare. Elytra subtriangular, rather long, flattened on the disc at the 
base, and with prominent subapical callosities ; finely punctate-striate, the interstices densely punctulate. 
Beneath closely punctate, the sides of the metasternum smoother. Prosternum slightly hollowed down 
the middle. Anterior coxe narrowly separated. 
Length 34, breadth 12 millim. (9@.) 
Hab. Mrxico, Chilpancingo (H. H. Smith). 
One specimen, in very fresh condition. Closely related to @. tuberculifer, but with 
a large, oblique, bifurcate, sharply-defined, dark patch on the disc of each elytron, the 
