290 RHYNCHOPHORA. 
subquadrate, the eyes not prominent ; antenne short. Prothorax at the base twice as broad as long 
rapidly narrowing from about the middle forwards and feebly constricted in front ; the surface coarsely, 
somewhat closely punctate, the flanks granulate. Scutellum transverse, almost smooth. Elytra broadly 
explanate at the sides, the expanded margin obliquely truncate in front and rapidly narrowing posteriorly, 
the humeri rounded; the disc coarsely and deeply punctate-striate, the interstices smooth and convex. 
Anterior femoral teeth short. Anterior tibiw very stout, sparsely ciliate within, truncate and sharply 
bimucronate at the apex, the external hook long. 
Length 4, breadth 32 millim. 
Hab. British Honpuras, Rio Sarstoon (Blancaneauz). 
One specimen. This insect approaches the South-American C. cassidoides, Gyll., 
and C. marginalis, Imhoff, but it is rufo-ferruginous in colour and the elytral margin 
is less expanded anteriorly, the humeri being more rounded. 
9. Camarotus dilatatus, sp.n. (Tab. XV. figg. 3, 3a, 0.) 
Broad, depressed, shining, testaceous, the eyes, scutellum, and under surface (the head excepted) black, very 
finely pubescent. Head finely punctate, the punctures becoming coarser and longitudinally confiuent on 
each side of the carina between the eyes, the rostrum almost smooth at the tip, the eyes large and not 
prominent; antenne a little longer than the anterior tibie. Prothorax short, nearly two and one-half 
times as broad as long, abruptly narrowed and feebly constricted in front; the surface closely and rather 
coarsely punctate, the flanks granulate. Elytra broadly explanate at the sides, the expanded margin 
abruptly and obliquely sinuato-truncate in front and rapidly narrowing posteriorly, the humeri obtusely 
angulate; the disc coarsely punctate-striate, the interstices convex and almost smooth. Anterior femoral 
teeth long. Anterior tibie strongly curved, broad, sparsely ciliate within, very obliquely truncate and 
sharply mucronate at the apex, the external hook moderately long. , 
Length 33, breadth 33 millim. 
Hab. Guatemata, Cerro Zunil, Pacific slope, 4000 feet (Champion). 
One example. More depressed than C. singularis, testaceous above and black 
beneath, the explanate margin of the elytra more hollowed in front (the intermediate 
legs thus being visible from above), the anterior femoral teeth longer, the anterior 
tibiee very obliquely truncate at the apex and armed with a single long tooth only at 
the inner angle. . 
Group CHOLINA. 
The species of this group are all Tropical-American and of similar habits to Hilipus 
(being found about the branches of fallen timber in forest-clearings), from which they 
are separable by the non-contiguous anterior cox *, the more feebly developed femoral 
tooth, the less divergent tarsal claws, &c. Numerous genera have been adopted by 
Lacordaire, Pascoe, and Chevrolat, but the discovery of new forms shows that several 
of them cannot stand. Rhinastus and Homalonotus are not represented in the Central- 
American fauna. 
* Tn a new species of Hilipus, from Nicaragua, placed with Cholus when our collections were sorted, the 
anterior cox are narrowly separated. 
