288 RHYNCHOPHORA. 
55. Gergzeus pexus. (Tab. XV. figg. 27, 27a, 3.) 
9. Centrinus pexus, Boh. in Schénh. Gen. Cure. viii. 1, p. 209°. 
g. Prosternum armed with two stout, upturned, short or moderately long, connate, granulate spines. Rostrum 
multicarinate to the tip, the compressed basal portion rugosely punctate as in the 2. First ventral 
segment flattened down the middle. 
Hab. Mxxico! (Mus. Brit.), Tonilain Colima (Hége); GuaTemata, Aceytuno (Salvin), 
San Gerénimo and Sinanja in Vera Paz (Champion); Nicaragua, Managua (Solar?). 
I have seen ten specimens of this species, including the (2?) type. The densely 
squamose surface, the comparatively stout, strongly arcuate, compressed, rugose, carinate 
rostrum, and the completely connate prosternal spines of the male (which, at most, 
are less than half the length of the rostrum), readily distinguish G. perus. The 
prosternum is shallowly sulcate down the middle. ‘The antennal club is ovate and 
rather small. The mandibles are toothed on the under side at the base externally. 
56. Gereeus unicornis, sp.n. (Tab. XV. figg. 28, 28a, 3.) 
Rhomboidal, narrow, shining, nigro-piceous, the antenne, rostrum, and legs (and in one specimen the prosternal 
spine also) more or less ferruginous; somewhat thickly clothed with small whitish and pale brown 
scales, which are clustered into one, two, or three lines along each elytral interstice, the whitish scales 
condensed into three narrow vitte on the prothorax, a streak down the basal half of the interstices 2 
and 6, another on 4 beyond the middle, and a shorter one at the apex of 2; the vestiture of the under 
surface wholly whitish. Head closely punctate; rostrum strongly arcuate, considerably longer than the 
head and prothorax, slender, slightly thickened at the base and flattened at the tip, finely striate-punctate 
in its basal half, smoother in the 9, the antenne inserted at the middle, the antennal club oblong-ovate. 
Prothorax transverse, conical, constricted in front; finely, confluently punctate, the narrow interspaces 
raised into longitudinal ruge. Elytra triangular, sharply striate, the interstices flat and closely 
punctulate. Beneath closely punctate. Prosternum unimpressed behind the transverse subapical groove. 
Anterior coxe separated by less than half their own width. Legs rather long and slender. 
¢. Prosternum armed with a long porrect spine ; first ventral segment slightly depressed down the middle. 
Length 3-31, breadth 12-1} millim. (¢ 2.) 
Hab. Guatemata, Purula (Champion) and Coban (Conradt) in Alta Vera Paz. 
A pair, worn, from Purula, and a male, in fresh condition, from Coban. The slender 
prosternal spines in this species are completely fused, as in G@. pexus (Boh.), though 
the two insects are not otherwise very nearly related. The conical, trivittate prothorax 
and the interruptedly albo-lineate elytra are also characteristic. 
57. Gerzeus tuberculifer, sp.n. (Tab. XV. figg. 29, 29a, 3.) 
Rhomboidal, narrow, black, the antenne, apical half of the rostrum, tibiee, and tarsi more or less ferruginous, 
the femora also sometimes reddish ; densely clothed with brown and whitish scales (those on the elytra 
rather broad), the latter in great part condensed into a median vitta on the prothorax, which extends 
backward over the scutellum to about the median third of the suture, and a large apical patch on the 
elytra; the under surface densely albo-squamose. Head densely punctate; rostrum arcuate, stout, 
becoming more slender towards the tip, distinctly longer than the head and prothorax, closely punctate, 
the apical half in the @ flattened and much smoother, the antenne in the ¢ inserted at a little beyond, 
and in the 9 slightly behind, the middle, the antennal club ovate. Prothorax transverse, conical, feebly 
constricted in front ; densely, finely punctate, with an abbreviated smooth median line. Elytra rather 
