ERETHISTES. | 311 
$1. Tibia feedly unguiculate at the outer apical angle. 
1. Erethistes cyanipes, sp.n. (Tab. XVI. figg. 21, 21a, 6, 2.) 
Subrhomboidal, robust, black, with an sneous or bluish lustre, this being particularly noticeable on the legs ; 
above and beneath with the spaces between the smooth elevations thickly clothed with small, oval or 
oblong-oval, whitish or brownish-white scales (which give a mottled appearance to the surface), the 
ventral segments similarly clothed, the vestiture of the legs piliform. Head closely, rugulosely punctate ; 
rostrum moderately curved, rather stout, longer than the prothorax, carinate and closely punctate at the 
base, almost smooth in its outer half, the antenne inserted at the middle. Prothorax broader than long, 
somewhat rounded at the sides, narrowing from a little before the base, feebly constricted in front, closely, 
rather coarsely granulate, with indications of a short ocular lobe. Scutellum oval. Elytra very little 
wider than the prothorax, oblong-cordate; seriate-punctate, the interstices with smooth, transverse, 
irregular elevations or granules separating the squamigerous depressions, which are here and there 
transversely confluent. Anterior and intermediate cox very widely separated, the mesosternum 
flattened between the coxe. Prosternum emarginate in front. Legs elongate, stout; femora each 
with an acute tooth, the hind pair reaching some distance beyond the apex of the abdomen ; tibise 
mucronate at the inner apical angle and with a short claw at the outer angle. 
Length 16-18, breadth 73-81 millim. ( 2.) 
Hab. Mexico, Ventanas in Durango (Hége); Nicaracua, Chontales (Janson). 
Two specimens, probably both of the female sex, differing inter se in the sculpture and 
vestiture of the elytra, the Mexican insect (which we figure) having the smooth spaces 
smaller and granuliform, and the squamosity longer and more abundant. LH. cyanipes 
may be known from Cholus cinctus and its allies by the elongate hind femora. 
§ 2. Tibicee unarmed at the outer apical angle. 
9. Erethistes triangularis, sp. n. (Tab. XVI. figg. 22, 22a, 6.) 
Rhomboidal, flattened above, black, shining ; clothed with small, scattered patches of coarse, oval, yellowish 
scales, those on the elytra placed in the larger depressions of the surface and seriately arranged, the 
under surface a little more densely squamose, except along a broad space down the middle of the ventral 
segments 2-5, the legs with white hairs, the femora also wth yellowish scales. Head densely, rugosely 
punctate, the eyes very large and prominent; rostrum reaching the anterior margin of the metasternum, 
moderately stout, curved, rugulosely punctate and carinate at the base, for the rest very sparsely punctured, 
the antenne inserted at the middle. Prothorax broader than long, subconical, constricted in front, rather 
coarsely granulate, the elevations becoming more crowded and transverse on the disc. Scutellum rounded. 
Elytra much wider than the prothorax, rapidly narrowing from the base, somewhat triangular, the humeri 
being laterally prominent, transversely depressed below the anterior margin, the apices obtuse; inter- 
ruptedly seriate-punctate, the alternate interstices with a series of subquadrate or rounded, and the others 
with a series of smaller, fovese, which are here and there transversely confluent, 7 and 9 subcostate. 
Anterior cox widely separated. Ventral segments with a broad, smooth, sparsely squamose space down 
the middle, 1 broadly depressed in the centre behind. Legs elongate; femora each with an acute tooth, 
the hind pair reaching a little beyond the apex of the abdomen ; tibise unarmed at the outer apical angle. 
Length 12, breadth 53 millim. 
Hab. Costa Rica, Rio Sucio (Rogers). 
One specimen, probably a male. The flattened, subtriangular, seriate-punctate and 
foveolate elytra, and the small, scattered, dense patches of coarse yellowish scales, which 
cover the larger depressions of their surface, distinguish this species at once from 
its allies. 
