218 RHYNCHOPHORA. 
CAMPTOCHIRUS. 
Camptocheirus, Lacordaire, Gen. Col. vi. p. 599 (1863). 
Camptochirus, Gemminger and Harold, Cat. Col. viii. p. 2511; Pascoe, Journ. Linn. Soc.,' Zool. 
xi. p. 33. 
A Tropical-American genus including several remarkable species, the six known or 
described being from the southern continent. The four now added from our region 
may be regarded as modified forms of the S.-American C. chiragra (Fabr.); they are 
separable thus :— 
a. Elytra each with a long spine at the apex ; anterior tibie abruptly truncate at 
the tip, the inner apical angle sharply mucronate ; posterior femora unarmed. spinicauda, sp. 0. 
b. Elytra lamellate near the apex; anterior tibie very obliquely truncate at the 
tip, the inner apical angle truncate or pointed. 
a’, Elytra with the subapical dilatation broad, rounded externally, the interstices 
dull and flat, the humeri angularly raised; posterior femora dentate. . explanatus, sp.n. 
b’. Elytra with the subapical dilatation triangular or rectangular, the inter- 
stices convex and more or less shining, the humeri less prominent ; 
posterior femora unarmed. 
a’. Disc of the elytra here and there nodose 
angulatus, sp. De 
b’. Disc of the elytra flat . 
deplanatus, sp. n. 
1. Camptochirus spinicauda, sp. n. (Tab. XII. figg. 15, 15a.) 
Elongate, rather broad, dull, black, the tip of the rostrum, the front of the prothorax, the apical margin of the ~ 
elytra, the antenne (the club excepted), the intermediate and hind legs, and the anterior tibie and tarsi, 
more or less ferruginous ; the slightly raised portions of the surface with velvety-black pubescence, which 
is condensed into a large patch on each elytron, and the other parts with grey or brownish hairs, the vestiture 
of the sctitellum white. Head closely punctate, the eyes moderately large and somewhat widely separated 
above; rostrum short and stout, shorter than the prothorax, shining, rugosely punctate at the base, 
sparsely so at the tip, the antenne inserted before the middle, short, joint 2 of the funiculus shorter than 1, 
3-7 transverse and closely articulated (the club injured). Prothorax broader than long, abruptly narrowed 
and constricted in front, and also a little narrowed at the base, densely, finely punctate, the dise quadri- 
nodose and grooved down the middle. Elytra much wider than the prothorax, oblong-quadrate, flattened 
on the disc, the humeri swollen and subangular, the apices broadly and separately rounded ; punctate- 
striate, the interstices broad, flat, densely rugulose, 3 nodose at the base and 5 produced into a long spine 
at its point of termination. Tibie strongly unguiculate; the anterior pair comparatively short, strongly 
mucronate at the inner apical angle, and also mucronate and ciliate at the outer angle, the claw long. 
Intermediate femora toothed, the posterior pair unarmed. 
Length 53, breadth 23 millim. (¢ ?) 
Hab. Mexico, Toxpam (Sal/é). 
One example. Differs from the other Central-American forms in having the fifth 
elytral interstice produced into a long spine at the apex. The elytra, as in C. expla- 
natus, have each a large, oblong, velvety-black patch at the middle of the disc. 
2. Camptochirus explanatus, sp.n. (Tab. XII. figg. 16, 16 a.) 
Elongate, rather broad, dull, black, the apical margin of the elytra, the tarsi, and the knees more or less, 
ferruginous or rufo-testaceous, the antenne similarly coloured, but with joints 1 and 2 of the club 
