GERAUS. 267 
of the suture; the prosternum with a transverse subapical fovea and another fovea on each side of it, 
the spines and excavation of the male varying in development, the spines in fully-developed examples 
curved upward at the tip and as long as the elytra, in the undeveloped form reduced to two tubercles. 
Length 3j—-4, breadth 12-2 millim. (¢ 9.) 
Hab. Mexico, Toxpam (Sallé), Teapa (H. H. Smith); Guatemata, Chacoj, Cahabon, 
and Chiacam in Vera Paz (Champion), Coban (Conradt) ; Panama, Bugaba (Champion). 
Twelve specimens, varying in the extent of the elytral markings, but apparently 
distinct from G. trinotatus. Five males have been received—two with very long 
prosternal spines, one of these being shown on our Plate. 
11. Gereeus cemas. (Tab. XIV. figg. 29, 29a, 2, var.) 
Cenitrinus cemas, Boh. in Schénh. Gen. Cure. iii. p. 738 (¢)*; vill. 1, p. 212 (8 9)”. 
Subrhomboidal, rather narrow, piceous, the rostrum, antennaw, legs, and base of the elytra more or less 
ferruginous, the rest of the elytra black; thickly clothed with rather coarse pale ochraceous scales, the 
elytra (an oblique streak on the outer part of the disc near the tip, and a few scattered scales along the 
third and fifth interstices, and some others at the sides and apex, excepted) black from about the basal 
fourth, the prothorax faintly trilineate with whitish and with the scales transversely arranged; the 
vestiture of the under surface dense, yellowish-white. Head closely punctate, foveate between the eyes ; 
rostrum arcuate, rather slender, not longer than the elytra, sparsely, finely punctate, thickened and 
rougher at the base, the antennew inserted at about the basal third, the antennal club acuminate-ovate. 
Prothorax transverse, rounded at the sides anteriorly, much narrowed in front; densely, finely punctate. 
Elytra subtriangular; narrowly punctate-striate, the interstices asperato-punctate. Beneath densely 
punctate. Prosternum with a transverse subapical impression and the subapical groove deeply impressed 
behind each of the eyes. 
Length 2°, breadth 13 millim. (¢@.) 
Hab. Panama, Bugaba (Champion).—Braziu t. 
This insect appears to be a small form of Centrinus cemas, Boh., and there are two 
specimens in the series of that species in the British Museum very similar to the one 
here described; the true C. cemas, however, has the elytra black to near the base. 
Females only have been seen by me. The more extended black vestiture of the elytra 
separates G. cemas from G. tenuispinis, both species having the prosternum bispinose 
in the male. 
12. Gereeus trilineatus, sp.n. (Tab. XIV. figg. 30, 30a, 3.) 
Rhomboid-ovate, piceous, the prosternal spines, antenne, rostrum, and legs more or less ferruginous; thickly 
clothed with rather coarse pale ochreous scales, the prothorax faintly trilineate with whitish, these lines 
being continued along the suture and fifth elytral interstice, the elytra each with a transverse, rounded, 
interrupted, blackish patch on the disc before the middle and a short oblique blackish streak near the 
suture before the apex; the vestiture of the under surface white and dense. Head closely punctate, 
foveate between the eyes; rostrum strongly arcuate, very long, thickened towards the base, striate- 
punctate, the antenne inserted far behind the middle. Prothorax transverse, rounded at the sides 
anteriorly, much narrowed in front; densely, finely punctate. Llytra subtriangular, narrowly punctate- 
striate, the interstices asperato-punctate. Prosternum armed with two very long porrect spines, and also 
with a broad smooth excavation between them extending forward to the transverse subapical fovea. 
Louth 31-4, breadth 17-2 millim. (<¢.) 
2MM 2 
