CYRIONYX, 199 
the antenn inserted beyond the middle. Prothorax transverse, somewhat convex, rounded at the 
sides, constricted in front; densely, finely punctate. Elytra subtriangular, constricted on each side 
below the rather prominent humeri, transversely depressed on the disc below the base; narrowly and 
deeply punctate-striate, the interstices flat and rugulose at the base, and sharply costate and almost 
smooth thence to the apex. Beneath closely punctate; ventral segment 1 depressed down the middle in 
the ¢. Legs long; femora sharply dentate ; anterior and intermediate tibie sharply, and the posterior 
tibie feebly, unguiculate. , 
Length 24-8, breadth 11-14 millim. (¢ 9.) 
Hab. Panama, Volcan de Chiriqui 2500-4000 feet (Champion). 
Three specimens. Nearly related to C. bilineatus, but wanting the continuous 
white submarginal stripe on the basal portion of the prothorax and elytra, the 
prothorax more transverse and not gibbous anteriorly, the elytral interstices rugulose 
at the base and not quite so sharply costate thence to the apex, the tibiee and the base 
of the femora rufous. 
21. Cyrionyx semicostatus, sp.n. (Tab. XI. fig. 25, var.) 
Very like C. apiatus (infra); black or piceous, the antenne and legs sometimes obscure ferruginous ; the 
prothorax with a complete median line, and an interrupted curved stripe on each side, white; the elytra 
each with four white spots—one on the sixth interstice at the base, one on the second a little lower down, 
one at the sides (transverse) below it, and one on the dise towards the apex,—the inner interstices (the 
first, or sutural one, excepted) narrowly costate from a little below the base, the others somewhat 
angular ; the vestiture of the under surface closer, white, dense along the lower parts of the flanks of the 
prothorax and on the metathoracic episterna. 
Length 13-2, breadth ;%-1,5 millim. (¢d Q.) 
Hab. Mexico, Teapa (H. H, Smith); British Honpuras, Belize (Blancaneauz) ; 
GuateMaLa, Cubilguitz and Chacoj in Vera Paz (Champion). 
Var. The prothorax with three uninterrupted white lines; the elytra with the white spot at the base of the 
sixth interstice extending downward to join the transverse mark below it. 
Hab. Panama, David (Champion). 
Eight specimens, the two from David (from one of which our figure is taken) being 
doubtless an extreme form of the same species. ‘The cariniform inner elytral interstices 
is a character still more emphasized in some other members of the genus. ‘The 
prothorax appears to be longer and broader in the male than in the female. 
22. Cyrionyx nitidipennis, sp. n. (Tab. XI. figg. 26, 26a.) 
Oblong-rhomboidal, rather convex, shining, black, the antenne, the base of the femora, and the tibiz in part, 
ferruginous; the prothorax with three lines of intermixed fulvous and white adpressed hairs ; the elytra 
with a few scattered pure white scales, which are clustered into a narrow oblique streak at the base, two 
minute spots below it, a transverse mark at the sides below the shoulder, and two oblong spots on the 
dise near the apex, the basal region also with scattered fulvous hairs ; the vestiture of the legs and under 
surface sparse and fine, fulvous and white intermixed. Rostrum considerably longer than the head and 
prothorax, strongly arcuate, rather stout, striate and faintly punctate in its basal two-thirds, much 
smoother at the apex, the antenne inserted at a little beyond the middle. Prothorax transverse, rounded 
at, the sides from near the base, constricted in front; densely, finely punctate. Elytra elongate- 
triangular, flattened near the suture, the humeri rounded ; deeply striate, the strie faintly punctate, the 
