176 RHYNCHOPHORA. 
fulvous scales. The male has the fifth ventral segment slightly depressed in the middle 
and the intermediate tibie excavate on the inner side near the apex. ‘The var. marmo- 
ratus appears to be based on partially abraded examples. 
8. Peridinetus collaris, sp.n. (Tab. X. figg. 21, 21a, ¢.) 
Subovate, robust, opaque, black, the tarsi ferruginous ; the vestiture very fine, in great part fulvous, rather close 
on the head and prothorax, and sparse on the rest of the surface; the prothorax with a broad, oblique, dense, 
pale ochreous band on each side, extending downward on to the flanks posteriorly (not reaching the hind 
angles, as seen from above), and continued on to the mesothoracic epimera, the two bands becoming 
coalescent at the apex (in one specimen continued on to the vertex); the elytra mottled with black across 
the middle and towards the apex; the legs and ventral surface with scattered intermixed fulvous and 
white, hair-like scales, the tarsi with ochreous hairs. Head sulcate between the eyes; rostrum very 
stout, feebly arcuate, not longer than the prothorax, finely, very sparsely punctate; joint 1 of the 
funiculus much longer than 2. Prothorax broader than long, convex, rounded at the sides, abruptly 
narrowed in front, strongly bisinuate at the base; closely, minutely punctate. Elytra moderately long, 
broad, triangular, transversely depressed before and beyond the middle, the intervening portions of the 
interstices 3 and 5 somewhat swollen; finely punctate-striate, the interstices closely punctulate, flat, 
9 faintly, narrowly costate. Ventral segments sparsely punctate; 1 excavate down the middle pos- 
teriorly, and 5 also depressed at the apex and with its apical margin emarginate, in the ¢. 
Length 8, breadth 32 millim. (<¢.) 
Hab. Mexico, Toxpam (Sal/é), Cerro de Plumas (Hége). 
Two specimens. The uneven elytra, the anteriorly coalescent, downwardly-directed, 
dense ochreous lateral bands on the prothorax, &c., distinguish P. collaris. 
9. Peridinetus coccineifrons, sp.n. (Tab. X. figg. 22, 22a, ¢.) 
Hilongate, shining, black, the antennal scape and the legs in great part (the anterior femora excepted) 
ferruginous ; clothed with small hair-like scales: the head and the anterior lobe of the prothorax 
carmine-red, the sides of the metasternum with a broad oblique ochreous patch; the rest of the 
vestiture sparse, white along the middle and sides of the posterior lobe of the prothorax; at the base 
of the third interstice and at the apex of the elytra (where it is condensed into a narrow stripe on the 
third interstice), and at the sides of the abdomen, and brownish or ochreous elsewhere, that of the legs 
ochreous and white intermixed, the elytra each with an apical spot and the base almost bare. Head 
shallowly sulcate between the eyes ; rostrum very stout, feebly arcuate, depressed at the base, not longer 
than the prothorax, almost smooth ; joint 1 of the funiculus longer than 2. Prothorax nearly as long as 
broad, subconical, the short anterior lobe narrower and tubulate; closely, minutely punctate, with indica- 
tions of a smooth median line. Elytra much wider than the prothorax, elongate-triangular, each obliquely 
depressed on the disc below the base; finely punctate-striate, the interstices rugulose, becoming narrowly 
costate towards the apex. Ventral segments closely punctate and squamose at the sides only, for the 
rest bare and very sparsely punctured, 1 broadly flattened down the middle in the ¢. 
Length 53-54, breadth 23 millim. (¢ 2.) 
Hab. Panama, Bugaba, Volcan de Chiriqui (Champion). 
Two specimens, one somewhat immature. Amongst the species with the vestiture 
of the head and anterior portion of the prothorax carmine-red, the present insect is 
easily recognizable by its elongate shape and the costate apical interstices of the elytra. 
P. coccineifrons has the general facies (except that the elytral spines are wanting) and 
coloration of Pteracanthus smidti. 
