346 RHYNCHOPHORA. 
rostrum (2) shorter, less curved, and striate at the base ; the prothorax with a stout 
median carina; the elytra with the vestiture whitish and fasciculate on the alternate 
interstices. ‘The armature of the femora is different from that of any other species 
here described ; the anterior pair, however, are formed as in C. serratidens. 
6. Conotrachelus tetrastigma, sp.n. (Tab. XVIII. figg. 6, 6a, 3; 7, 2.) 
Oblong-ovate, rather dull, piceous or rufo-piceous ; the vestiture sparse, ochreous or whitish, here and there 
subfasciculate on the elytra, the prothorax with a sinuous, irregular line on each side of the disc, the 
elytra with an interrupted transverse patch at the shoulders and a small, rounded spot on the subapical 
callus, and the prosternum with a transverse patch in front of the anterior coxw, densely clothed with 
ochreous scales; the femora with a ring of whitish scales a little beyond the middle, the anterior pair 
with a dense line of fulvous or ochreous scales along their basal third above. Head densely punctate, 
foveate between the eyes; rostrum strongly curved, in the g moderately stout, about twice as long as 
the prothorax, depressed at the base above, and 5-carinate, in the Q much smoother, more slender, 
feebly carinate at the sides only, and fully as long as the elytra; antennw inserted considerably beyond 
the middle of the rostrum in the ¢, and at the middle in the Q, joint 2 of the funiculus elongate, 
a little longer than 1. Prothorax transverse, somewhat rounded at the sides anteriorly, subparallel 
behind, narrowed and constricted in front, and strongly bisinuate at the base ; densely, rugosely punctate, 
and usually with a fine median carina extending from the apex to about the middle. Elytra subparallel 
at the base, the sides rounded and converging thence to the apex, the humeri obtuse; coarsely seriate- 
punctate, the interstices rugulose, 3, 5, 7, and 9 moderately costate, the ridge on 3 twice depressed or 
interrupted, that on 5 and 7 entire. Ventral segments shining, with a few very minute scattered 
punctures only, 1 deeply depressed down the middle in the g¢. Mesosternum flat between the coxe, 
obsoletely bituberculate in front. Legs elongate; femora clavate, each with a large triangular tooth, that 
on the anterior pair not very prominent; tarsal claws with a long tooth. 
Length 6-71, breadth 3-33 millim. (¢ 2.) 
Hab. Mexico, Jalapa (Hége); Guatemaua, San Gerdénimo (Champion). 
Six females and three males, the former varying in the extent of the curvature 
of the rostrum. The very long, comparatively slender, almost smooth rostrum 
of the female, and the uninterrupted second elytral costa, separate this species from 
the other similarly-coloured Central-American forms. The inner tooth of the tarsal 
claw is longer than in C. inexplicatus. ‘This is one of several nearly allied species 
resembling C. quadrinotatus in general coloration. 
7. Conotrachelus quadrinotatus. 
Conotrachelus quadrinotatus, Fahr. in Schénh. Gen. Cure. iv. p. 4321. 
Very like C. tetrastigma, and differing as follows :—The rostrum relatively shorter and stouter, and 5-carinate, 
in both sexes, in the ¢ not much more than twice the length of the prothorax, the antenne in the 
2 inserted at or a little before the middle, the funiculus with joints 1 and 2 subequal in length; the 
dorsal costee of the elytra more raised and strongly undulate (when viewed in profile), that on the third - 
interstice twice interrupted, and often that on the fifth also. 
Length 44-7, breadth 24-33 millim. (¢ 9.) 
fab. Mexico, 'Toxpam (Sallé); Guatemaua, Sabo and San Gerdnimo in Vera Paz 
(Champion) ; Nicaragua, Chontales (Belt); Cosra Rica (Biolley), San José (coll. 
Schild-Burgdorf ); Panama, David, Bugaba, Volcan de Chiriqui (Champion). — 
Brazin}. 
