214 RHYNCHOPHORA. 
d’, Blytra explanate at the sides posteriorly; prothorax without 
tubercles. 
ce’, Postero-lateral dilatation of the elytra acutely produced outwards ; 
sutural elevations moderately prominent; abdomen black . . . #rigonus, sp. n. 
d'’, Postero-lateral dilatation of the elytra rounded externally ; sutural : 
elevations large, flattened, divergent; abdomen ferruginous . . @sopus, Fabr. 
1. Prionomerus mucidus. (Tab. XII. figg. 7, 7 a.) 
Prionomerus mucidus, Boh. in Schénh, Gen. Cure. vii. 2, p. 246°. 
Hab. Mxxico (coll. Chevrolat!), Teapa (H. H. Smith); Guaremata, Cubilguitz, 
Zapote (Champion); Panama, Volcan de Chiriqui (Champion). o 
We possess six specimens of this species, which, when fresh, is thickly coated with 
a whitish secretion. 
2. Prionomerus simplex, sp.n. (Tab. XII. figg. 8, 8 a.) 
Subovate, shining, black; the antenne rufo-testaceous, with the two basal joints of the club black; the legs 
rufo-testaceous, the femora at or beyond the middle (the anterior pair very broadly), and the anterior 
tibia towards the apex, infuscate or black; clothed with a very fine grey pubescence. Head minutely 
punctate; rostrum moderately stout, a little shorter than the prothorax, rugulose at the sides and feebly 
carinate in its basal half, for the rest very sparsely punctate; antenne elongate, the club somewhat 
loosely articulate and nearly as long as the funiculus ; eyes very large. Prothorax a little broader than 
long, subconical, slightly rounded at the sides towards the base ; densely, rugulosely punctate, except in 
front, where the surface is almost smooth, the disc faintly carinate in the middle posteriorly. Elytra 
fully one-half wider than the prothorax, subparallel in their basal half, the humeri swollen and obtuse, 
the apices separately rounded; coarsely punctate-striate, the interstices convex and faintly punctulate. 
Legs comparatively slender; anterior tibiee very obliquely truncate at the apex (the inner apical angle 
thus appearing acuminate), the inner edge finely serrate to near the middle. 
Length 24, breadth 13 millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
One specimen, probably a male. Near P. mucidus, but narrower, the anterior 
tibiz not so stout and more obliquely truncate at the apex, the prothorax smoother 
in front, the elytra not transversely gibbous before the middle, the femora each 
annulated with black, the antennal club a little longer. 
3, Prionomerus femoralis, sp. n. (Tab. XII. figg. 9, 9a, 6.) 
Broad, robust, shining, black, the elytra sometimes with a brassy lustre, the tarsi and antenne rufo-testaceous, 
the anterior and intermediate femora broadly rufous at the middle; clothed with a very fine brownish- 
grey pubescence, that of the under surface grey. Head almost smooth; rostrum very stout, shorter than 
the prothorax, a little shorter in the ¢ than in the 9, somewhat coarsely and closely punctured in its 
basal half, much smoother at the tip; antennw short, joints 2-7 of the funiculus closely articulated, 3-7 
strongly transverse, the club compact, about as long as the funiculus. Prothorax conical, nearly as long 
as broad, constricted towards the apex, and usually more or less distinctly sulcate down the middle 
posteriorly, finely, rather sparsely punctate. Elytra broadly subquadrate, almost as broad as long, 
trausversely gibbous immediately below the base, the humeri oblique in front and a little swollen, the 
