314 RHYNCHOPHORA. 
from Cryptaspis, Pasc., by the presence of a scutellum. The suture of the elytra 
is quite straight at the apex, and the species are probably apterous or incapable 
of flight. 
1. Sclerosomus laticauda, sp. n. (Tab. XVI. figg. 26, 26 a.) 
Broad, oval, black, the antenne (the club excepted) ferruginous, opaque, the minute granules shining ; some- 
what thickly clothed with small, oval, brownish-ochreous scales, the prothorax with a faint oblique line 
on each side of the disc and a minute spot on the flanks, and the elytra with a narrow transverse fascia 
on the outer part of the disc at about the middle, two minute spots at the base (one near the scutellum 
and the other at the shoulder) and another near the apex, white; the vestiture of the under surface a little 
coarser, that of the legs sparse. Head rugosely punctate and granulate, the eyes very widely separated ; 
rostrum exceedingly stout, strongly curved, longer than the prothorax, rugosely punctate and subcarinate, 
almost smooth at the tip, the antenn inserted far before the middle. Prothorax strongly transverse, 
rounded at the sides, sinuate at the apex, narrowing from the middle forwards and also a little narrowed 
behind, and slightly constricted in front, closely, finely granulate. Scutellum transverse. Elytra con- 
siderably wider than, and about two and one-fourth times the length of, the prothorax, truncate at the 
base, broadly flattened along the suture anteriorly, parallel in their basal third and rapidly narrowing 
thence to the apex, the apices broadly, separately caudate ; somewhat closely, finely granulate, the seriate 
punctures scarcely visible. Prosternum emarginate in front. Anterior coxe rather narrowly separated. 
Mesosternum flattened between the cox. Legs short and stout, rugose and granulate ; femora each with 
a narrow tooth. 
Length 93, breadth 41 millim. (? d.) 
Hab. Mexico, Toxpam (Sal/é). 
One specimen. ‘This insect is quite unlike any of the other Cholina here described, 
and has much the facies of a Cryptorrhynchid. 
Group CRYPTORRHYNCHINA. 
This group is represented by a very large number of species within our limits, 
Conotrachelus, Cryptorrhynchus, Coclosternus, &c., being especially abundant throughout 
the forest-clad regions of Tropical America. These insects are mostly obtained by 
beating the branches of recently felled deciduous trees in new clearings. 
Sect. ITHYPORIDES. 
Ithyporides, Lacordaire ; Ithypori, Leconte. 
CLEOGONUS. 
Cleogonus, Schonherr, Cure. Disp. Meth. p. 315 (1826) ; Lacordaire, Gen. Col. vii. p. 67. 
A genus including a few Tropical-American species, two occurring within our limits. 
They are superficially very like various Barids, and are easily recognizable by their 
oval shape, glabrous upper surface, laterally sulcate elytra, grooved femora, broad 
rostral canal, &c. In repose, the tibie are received into the grooves beneath the 
femora, and the basal portion of the latter fits into cavities in the sternum, so that 
the legs can only be opened at a particular angle. 
