CONOTRACHELUS. 399 
One specimen. Smaller than C. gidbirostris, the elytra less dilated at the sides below 
the base, the median elevation on the third interstice relatively larger, the femora 
bidentate, the eyes narrowly separated, the rostrum less gibbous. Smaller than 
C. sulcicollis, the rostrum shorter, the elytra widening to some little distance below 
the base. 
104. Conotrachelus sulcicollis, sp. n. 
Subovate, shining, black, the legs distinctly, and the elytra very faintly, mottled with ferruginous, the antenne 
and tarsi wholly of that colour; the vestiture fine, very sparse, greyish, subfasciculate on the elytra, 
becoming closer and in great part fulvous on the base of the latter, and on the prothorax, head, and 
rostrum, the femora faintly biannulate, the anterior pair with a fulvous line at the base above. Head 
densely punctate, foveate between the narrowly separated eyes; rostrum very stout, arcuate, not longer 
than the head and prothorax, rugulosely punctate and 5-carinate to near the middle and thence to the 
apex sparsely punctured, the antenne inserted at one-third from the tip, joints 5-7 of the funiculus 
transverse, 2 much shorter than 1. Prothorax transverse, abruptly narrowed and strongly constricted 
in front, and deeply bisinuate at the base; coarsely, rugulosely punctate, except along the smooth, 
interrupted, median line, the disc obliquely binodose at about the middle (the two elevations united 
posteriorly and forming a V-shaped prominence) and sulcate on each side behind this, Elytra subtri- 
angular, narrowing from the base, deeply sinuate in front, the humeri obliquely truncated and subdentiform ; 
coarsely seriate-punctate, the punctures deep and subquadrate, the interstices slightly rugulose, 3, 5, 7, 
and 9 strongly and very sharply costate, the ridge on 3 and 7 twice, and that on 5 thrice, abruptly 
interrupted, the median elevation on 3 very large and lamelliform. Mesosternum flattened between the 
cox, somewhat protuberant and binodose in front. Ventral segments very sparsely, finely punctate. 
Femora strongly clavate, bidentate, the outer tooth small and distant from the other. Tarsal claws with 
a short tooth. 
Length 34-34, breadth 1{-2 millim. (2.) 
Hab, Panama, Bugaba, Volcan de Chiriqui (Champion). 
Two specimens. Near C. gibbirostris, but with the rostrum simply curved, the 
elytra not dilated below the base and with the median elevation on the third inter- 
stice larger, the femora bidentate, the eyes narrowly separated, &c. C. cordatus and 
C. cerulescens are more distantly related forms. 
105. Conotrachelus cavicrus, sp. n. (Tab. XX. fig. 11, hind leg of ¢.) 
Oblong-ovate, moderately shining, black, the rostrum, knees, and elytra mottled with rufo-piceous, the antennx 
and the tips of the tarsi ferruginous; the vestiture ochreous, slightly intermixed with whitish, very 
sparse on the prothorax and under surface, and closer elsewhere, subfasciculate on the elytra and 
condensed into a faint oblique line on each side of the disc of the prothorax (the two lines not connected 
in front), the femora incompletely biannulate, the anterior pair with a fulvous line at the base. Head 
closely punctate, shallowly foveate between the eyes; rostrum stout, cylindrical, arcuate, not longer than 
the head and prothorax, squamose, rugulose, and finely tricarinate, thickly punctate at the tip, the antennz 
inserted near the apex, joint 2 of the funiculus slightly shorter than 1. Prothorax transverse, rounded 
at the sides anteriorly, narrowed and feebly constricted in front, bisinuate at the base; densely, rugulosely 
punctate, obsoletely carinate anteriorly. Elytra narrowing from a little below the base, sinuate in front ; 
seriate-punctate, the interstices rugulose, 3, 5, 7, and 9 sharply costate, the ridge on 3 interrupted below 
the base and sinuous beyond the middle. Mesosternum flattened between the coxe, binodose in front. 
Ventral segments sparsely punctate. Femora clavate, unidentate, the anterior pair with a minute 
prominence placed at some distance from the tooth, Posterior tibie widened on the inner side from 
