292 RHYNCHOPHORA. 
Hab. GuateMa.a, Capetillo and Calderas on the slopes‘of the Volcan de Fuego 
(Champion). 
Three males and one female, two of them with the vestiture (? abraded) almost 
wanting on the scutellum. This insect is not unlike the N.-American Centrinus 
scutellum-album, Say, and C. salebrosus, Casey, and the Mexican C. larvatus, Boh. 
(here referred to Odontocorynus), but it differs from all of them in the sparse, fine 
vestiture of the upper surface (a character also separating G. albiventris from 
G. tectus), the under surface being densely clothed with rather large white scales ; the 
male, moreover, has the anterior tarsi dilated and the antennal club simply acuminate. 
The tip of the last dorsal segment is exposed, owing to the elytra being separately 
rounded at the apex. 
64. Gerzeus tectus, sp.n. (Tab. XVI. figg. 1, la, 2.) 
Subrhomboidal, broad, flattened above, black, the tarsi obscure ferruginous ; densely albo-squamose beneath, 
the upper surface (the base of the rostrum included) thickly clothed with rather coarse, narrow, yellowish- 
white scales, the scales on the prothorax long and transversely arranged, condensed into a small patch in 
front of the scutellum, those on the elytra arranged in a close double or treble series down each 
interstice, the first with one row only beyond the middle. Head closely punctate; rostrum curved 
downward from the base, a little longer than the head and prothorax, rather stout, the basal portion thickly 
punctate and finely carinate, the apical two-thirds much smoother, the antenne inserted at the middle, the 
antennal club short-ovate, stout. Prothorax transverse, rounded at the sides from near the base, much 
narrowed and feebly constricted in front; densely, rugulosely punctate. Scutellum depressed, transverse, 
almost bare. LElytra subtriangular, separately rounded at the tip, leaving the apex of the last dorsal 
segment exposed ; narrowly punctate-striate, the interstices densely asperato-punctate. Beneath densely, 
finely punctate, the sculpture hidden by the broad scales. Prosternum slightly depressed down the 
middle. Anterior coxe separated by about half their own width. 
Length 43, breadth 23 millim. (9.) 
Hab. Mexico, Oaxaca (Hége). 
One female. Very like Odontocorynus larvatus(Boh.)( 2 ), but with the scales on the 
upper surface much longer and less crowded, and condensed into a small, transverse, 
projecting patch on the median lobe of the prothorax (instead of on the scutellum), 
the prothorax without trace of a smooth median space, the rostrum less curved. The 
vestiture of the upper surface is longer and much coarser than in the N.-American 
C. (Odontocorynus) scutellum-album, Say *, and C. salebrosus, Casey, and the scutellum 
wants the white patch. 
65. Gereeus viridicans, sp. n. (Tab. XVI. figg. 2, 2a,b, 3.) 
Rhomboidal, narrow, shining, greenish-zeneous, the antenne fusco-ferruginous, the tip of the rostrum and the 
legs ferruginous; rather sparsely clothed with small, narrow, ochreous and whitish scales, which are 
arranged in a single or double line down each elytral interstice, the vestiture of the under surface close 
and whitish. Head finely punctate, transversely grooved between the eyes ; rostrum rather stout, 
arcuate, longer than the head and prothorax, sparsely punctate, the antenns (fig. 26) inserted at about 
* Also recorded from Brazil by Casey, but we have not received it from within our limits. 
