298 RHYNCHOPHORA. 
down the middle anteriorly. Anterior coxe narrowly separated. ‘Tibi strongly unguiculate, the 
anterior and intermediate pairs dilated at the apex. ; 
Length 4—5, breadth 1,%,-24 millim. (<.) 
Hab. Mexico, Omilteme, Xucumanatlan and Chilpancingo in Guerrero, 4600- 
8000 feet (H. H. Smith). 
Three specimens, apparently all males. An oblong, rather convex form, with a 
confluently punctate prothorax (except along the smooth median line), convex, shining 
elytral interstices, and coarse, scattered, setiform vestiture. GG. iners somewhat 
resembles G. coarctatus, these two species being more elongate than usual in this 
genus, approaching Micentrus. 
77. Gerzeus tonsilis. (Tab. XVI. figg. 12, 12a, }, 3.) 
Centrinus tonsilis, Boh. in Schénh. Gen. Cure. vill. 1, p. 218°. 
Centrinus (Odontocorynus) tonsilis, Casey, Aun. N. York Acad. Sci. vi. p. 577, nota’. 
Hab. Mexico!? (Dupont and Truqui, in Mus. Brit.), Toxpam, Orizaba, Parada, 
Yolos (Sallé), Cordova, Jalapa, Oaxaca (Hége), Cuernavaca (U.S. Nat. Mus.), 
Chilpancingo (Hége, H. H. Smith), Amula (H#. H. Smith), Temax in N. Yucatan 
(Gaumer); Costa Rica (Van Patten). 
A common insect in Mexico*. Distinguished by its oblong shape, the rather long, 
close, uniform, cinereous vestiture of the upper surface (arranged in two or three 
lines down each elytral interstice), and the unarmed prosternum and simple anterior 
tibie of the male. The rostrum is rather stout, sparsely squamose to the tip in the 
male, a little smoother and flattened towards the apex in the female. ‘The prosternum 
is slightly depressed down the middle. ‘The intermediate and posterior tibie are 
dilated at the apex, both strongly unguiculate in the male, the anterior pair with the 
claw almost obsolete in both sexes. The first ventral segment is excavate down the 
middle in the male. The mandibles are rather long, hollowed at the sides beneath, 
and meeting in a straight line above. ‘The antennal club is small and ovate, not in 
the least modified in the male. 
78. Gereeus gaumeri, sp.n. (Tab. XVI. figg. 13, 13a, ¢.) 
Oblong. rhomboidal, shining, black ; above sparsely clothed with narrow, ‘adpressed, setiform, cinereous scales, 
the scales on the prothorax transversely arranged and those on the elytra condensed into one or two 
lines down each interstice, the prothorax with a faint vitta of coarser scales (those on the dise being 
tine and hair-like) on each side near the outer margin and the elytra with the vestiture a little more 
condensed at the base of the second and third interstices; the under surface somewhat thickly albo- 
squamose. Head finely punctate, shallowly foveate between the eyes; rostrum arcuate, about as long as 
the head and prothorax, rather stout, slightly thickened towards the base, striate-punctate, smoother 
at the apex in the 9, the antenne inserted at (¢ ) or a little beyond ( ¢) the middle, the antennal club 
ovate. Prothorax broader than long, narrowing from the base, constricted in front 3 Closely, rather 
coarsely punctate, except along the smooth median line. Elytra subtriangular, narrowly punctate-striate, 
* Since these pages have been in type I have seen an allied form with finer vestiture, &., from Mexico city 
and Guanajuato, which must be dealt with in the Supplement. 
