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CONOTRACHELUS. 425 
front; coarsely seriate-punctate, the punctures deep and rounded, the interstices densely rugulose, 
7 costate at the base and slightly raised thence to the apex, 5 and 9 also faintly subcostate posteriorly. 
Anterior coxe narrowly separated, subconical. Intermediate coxe distant, the mesosternum rather 
broadly depressed between them. Metasternum short. Ventral segments very sparsely punctate. Legs 
stout ; femora clavate, unidentate ; tarsal claws rather short, with a moderately long tooth. 
Length 61, breadth 34 millim. (9 ?) 
Hab. Panama, Bugaba (Champion). 
One specimen. A broad robust species, with triangular elytra, the alternate 
interstices of which (the seventh at the base excepted) are scarcely raised on the disc, 
the vestiture close and uniformly brownish, with short, fine, decumbent, intermixed 
sete, the mesosternum depressed. 
151. Conotrachelus humerosus. (Tab. XXI. figg. 11, 11a.) 
Conotrachelus humerosus, Fahr. in Schénh. Gen. Cure. iv. p. 422°. 
Var. The vestiture of the upper surface almost entirely greyish or whitish, a triangular space on the disc of 
the prothorax at the base excepted. 
Hab. Mexico, Alvarado in Vera Cruz (Chevrolat 1), Jalapa (Hoge, Smith); Panama, 
Volcan de Chiriqui (Champion). 
Of this species we have received six specimens from Mexico and five from Panama, 
varying from 34—54 millim. in length, some of them agreeing perfectly with the type. 
The latter has a large greyish-white, common, discoidal patch on the elytra, this colour 
extending in two of the Jalapa examples to nearly the whole of the upper surface, the 
rest of the fine vestiture being more or less ferruginous. The obliquely truncated 
elytral humeri are spiniform in some examples and rather obtuse in others; the 
broadly interrupted dorsal costs, too, vary in development. The carinate prominence 
on the middle of the disc of the prothorax is always conspicuous. The femora are 
unidentate. The intermediate coxe are widely separated. ‘The mesosternum is broad, 
and hollowed in the middle anteriorly. ‘The rostrum is rather elongate in both sexes, 
rugulose, and feebly unicarinate. 
The North-American C. crategi, Walsh, is an allied form. A specimen from 
Chiriqui is figured. 
152. Conotrachelus nodifrons, sp. n. 
Ovate, robust, moderately shining, black, the rostrum (except at the tip) and the legs in part rufo-piceous, the 
antenne obscure ferruginous ; the vestiture very sparse on the prothorax, rostrum, and under surface, 
closer elsewhere, fulvous, subfasciculate and slightly intermixed with whitish on the elytra, and condensed 
into a conspicuous patch at the base of the latter on each side of the scutellum, the prothorax with two 
small condensed fulvous spots at about the middle of the disc, the femora obsoletely annulate ; the upper 
surface also set with short, fine, scattered, semierect sete. Head closely punctate, transversely depressed 
in front, with a smooth raised space along the middle and a subtriangular smooth space on each side of 
it ; rostrum slender, curved, much longer than the head and prothorax, tricarinate at the base, the apical 
half very sparsely, finely punctate, the antenne inserted slightly beyond the middle, joints 1 and 2 of the 
funiculus subequal in length. Prothorax transverse, rounded at the sides, narrowed and feebly constricted 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 4, September 1904. 3 II 
