276 RHYNCHOPHORA. 
¢. Prosternum armed with two short upwardly-curved spines, and also slightly hollowed between them ; 
anterior tibiee strongly unguiculate, dilated on the inner side near the base and hollowed thence to the 
apex, sparsely ciliate within. 
Length 32, breadth 1,%—2 millim. (<¢.) 
Hab. Mexico, Juquila (Sailé); Guatemata, Capetillo (Champion). 
Three males, all a little worn. ‘Two females in better condition from Amula (//. /. 
Smith), with the apical half of the rostrum bare and sparsely punctate, may also 
belong here. Smaller, narrower, and more sparsely squamose than G. spiniger, the 
scutellum clothed with scales, the anterior tibie (¢) dilated near the base and 
clothed with shorter hairs, the femora without long hairs beneath. The bispinose 
prosternum separates G. sinuatipes from G. tonsilis, &c. 
30. Gerzeus gracilis, sp. n. 
Subrhomboidal, narrow, black, the antennze, mandibles, and tarsi obscure ferruginous; thickly clothed with 
narrow white or brownish-white scales, which are arranged in two or three rows down each interstice, the 
scales on the under surface pure white, larger, and more closely placed. Head sparsely punctate; 
rostrum arcuate, longer than the head and prothorax, moderately stout, closely punctate—the apical 
half in the 2 more slender, bare, flattened, and almost smooth,—the antenne inserted at ( ¢ ) or behind 
(2) the middle, the antennal club ovate. Prothorax transverse, subconical, densely punctate. Scutellum 
almost bare. LElytra subtriangular, finely punctate-striate, the interstices densely, rugulosely punctate. 
Beneath densely punctate. Anterior cox narrowly separated. 
g. Prosternum armed with two slender spines ; first ventral segment shallowly depressed down the middle, 
the fifth with a transverse, almost bare excavation; anterior tibis narrow, strongly unguiculate, sinuate 
within. 
Length 24-3}, breadth 14-13 millim. (¢ 2.) 
Hab. Mexico, Chilpancingo, Amula (H. H. Smith: 3 2), Temax in N. Yucatan 
(Gaumer: 3). 
Five males and one female. A small, narrow form with uniform whitish vestiture, 
the scutellum almost bare, the prosternum armed with two slender spines in the male. 
31. Gergzeus spinipectus, sp. n. 
Subrhomboidal, narrow, black or piceous ; above rather sparsely clothed with small, narrow, yellowish-white 
scales, which are arranged in two or three rows down each elytral interstice, the vestiture of the under 
surface coarser, denser, aud wholly whitish. Head finely punctate; rostrum arcuate, much longer than 
the head and prothorax, moderately stout, slightly thickened towards the base, closely punctate, the 
antennee inserted at about the middle. Prothorax short, subconical, constricted in front ; densely, finely 
punctate, with indications of a smooth median line. Elytra subtriangular, narrowly punctate-striate, the 
interstices rugulosely punctate. Beneath densely punctate ; first ventral segment broadly depressed down 
the middle, the fifth not excavate. Prosternum armed with two moderately long, slender, porrect spines. 
Anterior tibie narrow, unguiculate at the apex. 
Length 31-34, breadth 14-1§ millim. (¢.) 
Hab. Guatemaua, near the city (Salvin). 
Three specimens, one rather immature. Closely related to the Mexican G. gracilis, 
but with a relatively shorter prothorax and finer vestiture above, the fifth ventral 
segment of the male unimpressed, the prosternal spines longer. This last-mentioned 
character separates G, spinipectus from various other similar forms. 
