284 RHYNCHOPHORA. 
One male, with the elytra much abraded. This is the Mexican representative of 
the Guatemalan G. twmidirostris, differing from that insect in the regularly arcuate, 
non-tumid rostrum, the finely striate, unimpressed elytra, with densely rugulose 
interstices, the larger third tarsal joint, and the longer prosternal spines of the male. 
The conical, narrow prothorax, narrow prosternal sulcus, &c., separate G. scabripennis 
from worn G. senilis and allied forms. 
47. Gereus gentilis, sp.n. (Tab. XV. figg. 19,194, 3.) 
Rhomboidal, narrow, shining, nigro-piceous, the antennw, tip of the rostrum, prosternal spines, tibie, and 
tarsi more or less ferruginous ; very sparsely clothed with whitish, setiform scales, those on the elytra 
regularly arranged in a single row along each interstice, the metathoracic episterna closely albo-squamose. 
Head closely punctate, transversely grooved between the eyes; rostrum strongly arcuate, stout, as long 
as the elytra, seriate-punctate and feebly carinate, the antenne inserted at the middle, the antennal club 
ovate. Prothorax a little broader than long, conical; sparsely, obsoletely punctate on the disc, the 
punctuation becoming coarser and confluent at the sides. Scutellum subquadrate, narrow. LElytra 
triangular, deeply punctate-striate, the interstices narrow and uniseriate-punctate. Beneath closely 
punctate. Prosternum narrowly sulcate and armed with two long, slender, compressed spines. First 
ventral segment depressed down the middle. Anterior cox very narrowly separated. Legs rather long 
and slender ; anterior tibia strongly, the other tibiee more feebly, unguiculate. 
Length 24, breadth 1} millim. (¢.) 
Hab. Panama, Bugaba (Champion). 
One male. A small species, rhomboidal in form, with a conical prothorax, which 
is almost smooth along the middle of the disc, a strongly arcuate, stout rostrum, and 
a single regular line of whitish setiform scales down each elytral interstice, the pro- 
sternum armed with two long, narrowly separated spines, and the legs comparatively 
long and slender. G. gentilis has somewhat the facies of the N.-American Centrinus 
capillatus, Lec. 
48. Gerzus sculpticollis, sp.n. (Tab. XV. figg. 20, 20a, ¢.) 
Oblong-subrhomboidal, shining, black ; the upper surface set with a few scattered, coarse, oblong white scales 
intermixed on the elytra with fine, hair-like, fuscous scales, the larger scales condensed into small spots 
at the base and apex of the prothorax, and at the base of the elytra and also along their third interstice 
towards the tip; the under surface thickly, the legs more sparsely, albo-squamose, the tibise hairy within. 
Head finely punctate, transversely grooved between the eyes; rostrum strongly arcuate, rather stout, 
about as long as the elytra, thickened towards the base, coarsely punctate, the antenne inserted at the 
middle, the antennal club ovate. Prothorax broader than long, abruptly constricted and narrow in front, 
the sides rounded from near the base; rather coarsely, confluently punctate, the narrow interspaces 
raised into sinuous longitudinal ridges, and with a smooth raised median line. Elytra long, triangular, 
depressed along the suture; deeply punctate-striate, the interstices flat and irregularly biseriate-punctate. 
Beneath densely punctate. Prosternum sulcate and armed with two moderately long, slightly curved, 
downwardly-directed spines. First ventral segment broadly depressed down the middle, Anterior coxe 
narrowly separated. Legs rather elongate, the anterior pair especially ; anterior tibis curved, strongly 
unguiculate at the apex. 
Length 43-5, breadth 25-23 millim. (¢.) 
Hab. Mexico, Amula in Guerrero 6000 feet (H. Z. Smith). 
