449 RHYNCHOPHORA. 
Elytra nearly twice as wide as the prothorax, narrowing from about the basal fourth, transversely 
depressed a little below the base, the humeri rounded ; coarsely seriate-punctate, the interstices rugulose, 
3, 5, 7, and 9 costate, the ridge on 3 depressed or interrupted anteriorly, 10 also costate at the base. 
Intermediate coxe widely separated. Meso- and metasternum broadly hollowed down the middle, the 
cavity punctate. Ventral segments very sparsely, coarsely punctate. Femora clavate, acutely unidentate. 
Tarsal claws with a moderately long tooth. 
Length 43-52, breadth 23-3 millim. (d &.) 
Hab. Mexico, Tapachula in Chiapas (/ége); GUATEMALA, Panzos in Vera Paz 
(Champion); Costa Rica (Pittier, in Mus. Brit.). 
Eleven specimens, nine of which were found at Panzos. This species approaches 
C. subtilis, but has a relatively narrower, less rugose, bivittate prothorax, &c. ‘The 
oblique rusty-red vittee on the prothorax are very sharply defined in fresh examples, 
the flanks of the latter being almost bare. 
185. Conotrachelus costiferus. (Tab. XXI. figg. 26, 26 a.) 
Conotrachelus costiferus, Ros. in Schénh. Gen. Cure. iv. p. 452°. 
Hab. Mexico, Orizaba (Chevrolat1), Teapa (H. H. Smith), Tapachula (Hoge), 
Yucatan (Mus. Brit.); Brivis Honpuras, Rio Hondo (Blancaneauz). 
The type of the species, now before me, is abraded, and wants the fine, scattered, 
intermixed fulvous and white vestiture, which is subfascicularly arranged on the 
elytra, and the short, fine, pallid sete are also nearly all rubbed off. The transverse 
dense whitish patch on the front of the head is usually divided down the centre by a 
smooth raised line, and in the middle of each portion there is a small bare prominence. 
The prothorax is coarsely, rugosely punctate, and the median carina running down the 
anterior half is often dilated posteriorly into a smooth flattened space. The alternate 
elytral interstices are uninterruptedly costate. The femora are unidentate and faintly 
annulate, the anterior pair with a long fulvous streak at the base above. The rostral 
canal is rather deep and smooth, reaching to the anterior portion of the metasternum. 
The ventral segments are coarsely, closely punctate. The eight specimens seen vary 
from 55-7 millim. in length, and 24-4 millim. in breadth. 
186. Conotrachelus pluricostatus, sp. n. 
Subovate, shining, black, slightly mottled rufo-piceous, the tip of the rostrum, the basal half of the antenne, 
and the apices of the tarsi ferruginous ; the vestiture rather coarse, longer on the prothorax, moderately 
close, brownish, and uniformly distributed, the femora not annulate. Head densely punctate, transversely 
depressed and finely carinate in front ; rostrum rather slender, feebly curved, a little longer than the head 
and prothorax, 5-carinate at the base, sparsely, finely punctate in its outer half, the antenne inserted 
just before the middle, joints 1 and 2 of the funiculus elongate and subequal in length. Prothorax 
transverse, rounded at the sides, narrowed and feebly constricted in front, moderately bisinuate at the 
base; densely, rather finely punctate, the narrow intervening ruge becoming longitudinally confluent 
towards the apex, the disc with a fine median carina. Elytra subtriangular, comparatively short, the 
humeri rounded ; coarsely seriate-punctate, the interstices closely rugulose, 3, 5, 7, and 9 narrowly, very 
finely costate, and the others also finely costate from about the basal third onwards. Meso- and meta- 
