194 RHYNCHOPHORA. 
One specimen, in beautifully fresh condition. Distinguishable by the setigerous 
prominences on the prothorax and elytra, the one at the middle of the third interstice 
long, stout, and acutely produced behind. C. cristatus approaches C. gibbicollis. It 
has somewhat the facies of Phacelobarus singularis from Madagascar. 
9. Cyrionyx nigrosellatus, sp.n. (Tab. XI. figg. 16, 164, ¢.) 
Subovate, black, the legs in part and the antenne ferruginous ; variegated above with a dense clothing of 
small, fulvous, whitish and black scales, the whitish scales on the prothorax clustered into a median line 
and various oblique streaks at the sides and those on the elytra into a very large apical patch, the black 
ones on the elytra condensed into a common, transverse, interrupted, rhomboidal median patch and a 
spot on the third and fifth interstices about midway between it and the base; the under surface and 
legs with intermixed fulvous and white scales. Rostrum strongly arcuate, stout, not longer than the 
head and prothorax, striato-punctate, the antenne inserted at the middle. Prothorax transverse, gradually 
narrowing from the base, strongly constricted in front; densely, finely punctate, binodose on the disc. 
Scutellum small, triangular. Elytra subtriangular, slightly sinuate at the sides; very finely punctate- 
striate, the interstices densely rugulose, 3 (strongly) and 5 (feebly) nodose and nigro-squamose at about 
the middle, 5 produced into a conical tubercle at its point of termination. Beneath closely punctate ; 
intercoxal portion of the metasternum broad and somewhat depressed; ventral segments 1 and 2 
depressed down the middle. Legs rather short ; femora strongly dentate. 
Length 3, breadth 12 millim. (<.) 
Hab. Panama, Los Remedios near the Pacific coast (Champion). 
One specimen. This species has wholly the facies of a Cryptorrhynchid (Cono- 
trachelus, &c.), and may be known by its binodose prothorax and tuberculate elytra. 
‘The elytral interstices are flat and densely clothed with whitish scales behind the black 
squamigerous elevations at the middle of the disc; the conical tubercle at the apex of 
the fifth is very prominent. 
10. Cyrionyx balaninoides, sp.n. (Tab. XI. figg. 17, 17a, 2.) 
Rhomboidal, robust, nigro-piceous, the rostrum reddish ; somewhat thickly clothed with minute, narrow, 
fulvous scales, the under surface and legs with afew whitish scales intermixed. Rostrum feebly arcuate, 
long, rather slender, sparsely, finely punctate, striato-punctate and carinate at the base, the carina 
running upwards between the eyes, the scrobes in great part visible from the sides, the antenne inserted 
far behind the middle, the club large, acuminate-ovate. Prothorax broader than long, rapidly, arcuately 
narrowing from the base, strongly constricted in front; densely, finely, confluently punctate and also 
carinate, the carina not reaching the base and prominent in front. Elytra broad at the base, triangular ; 
finely punctate-striate, the interstices almost flat, densely rugulose, each very finely costate down the 
middle, the ridges becoming more distinct towards the sides and obsolete towards the suture. Beneath 
closely punctate. Legs rather stout ; femora strongly dentate ; tarsal claws subconnate. 
Length 43, breadth 2? millim. ( 2.) 
Hab. Panama, Caldera in Chiriqui (Champion). 
One specimen. This insect somewhat resembles Optatus tnornatus (the vestiture 
being similar in the two species), but it is smaller and Jess elongate, the rostrum is 
more slender, the elytral interstices are faintly costate, the scutellum is less transverse, 
&c. The rostral carina extends upward and nearly meets the median ridge of the 
prothorax, and the scrobes are in great part visible from the sides. 
