256 RHYNCHOPHORA. 
angles, the hind margin subtruncate, produced at the suture ; surface cylindrico-convex to the posterior 
third, black cr fusco-piceous, shining, glabrous, subreticulate, and indistinctly punctured in rows; apex 
strongly deflexed, subimpressed near the suture, the margins of which are elevated, rather strongly 
punctured, and somewhat gibbous above at the sides, without setiferous tubercles. Underside piceous, 
the legs ferruginous. 
Hab. Mexico, Toxpam (Sal/é); GuateMaLa, San Gerénimo, Pantaleon (Champion) ; 
Panama, Boquete (Champion). 
Seven examples, three of which are from San Gerdnimo. I have another from 
tobacco-refuse. ‘The female of this species is allied to, and might be mistaken for, 
C. papulans, Hichh.; it is separated by the frontal fringe of hairs and the subtruncate 
declivity of the elytra, which is entirely glabrous and more strongly punctured, with 
the sutural margins distinctly elevated. A male specimen from Boquete is smaller and 
shorter; the elytra are rufescent behind, more diffusely punctured, less impressed on 
either side of the declivity, with the suture less strongly elevated. 
The two examples, both males, from Toxpam, also differ from the single male from 
San Gerdnimo, being larger and more robust, with the elytra more strongly punctured 
towards the base, more widely impressed behind, with the suture less strongly raised 
and the elevated sides perceptibly though feebly tuberculate, I have not observed any 
sensitive patch on the antennal club in the female of this species. 
3. Corthylus luridus, sp. n. (Tab. VIII. fig. 4, antenna, 2 .) 
Fem. Breviter oblonga, sordide fusca, prothoracis basi dilutiore ; fronte concava, pube brevi ornata; anten- 
narum clava transverse subovali, fimbriata ; prothorace semielliptico, supra posterius vix nitido, levi; 
elytris sat nitidis, sine ordine punctatis, apice fortiter declivi, subdeplanato, infra marginato, tuberculis 
sparsis ornato. 
Long. 2°4 millim. 
female. Short, oblong, subcylindric. Head fuscous-black, broadly hollowed in front to the level of the eyes, 
with fine erect pubescence, the median line indistinct, eyes small; antenne testaceous-brown, the 
flattened scape truncate at apex with the lower angle prominent, club transverse, suboval, its margin 
forming a continuous curve sinuate on the lower side above its attachment to the funiculus, the sutures 
curved, the outer face convex, apparently +-articulate, the joints separately convex and the terminal one 
with a superficial groove parallel to the last suture, the inner face concave, shining, its superior edge with 
a thin flagellum of fine cirri curving round the apex and a little longer than the club. Prothorax as 
long as wide, truncate and not margined at the base, slightly widened at the sides before the base, and 
rounded from behind the middle to the apex in an elliptic curve; surface infuscate, its posterior half 
and the extreme apex obscure testaceous, very gradually declivous in front, the median elevation scarcely 
traceable, its anterior third asperate, the asperities very weak from there to the middle, the posterior 
half somewhat dull, impunctate, slightly impressed on either side towards the margined hind angles. 
Scutellum triangular, fusco-testaceous. Llytra as wide as the prothorax and one-fourth longer, their 
sides gently rounded, but not narrowed posteriorly, inflexed behind in a rounded angle to form the 
sinuate apical margins which meet at the suture in a very obtuse angle; surface cylindrico-convex, the 
apical third declivous, dull brown-testaceous, darker along the sides, with fine irregular punctuation, 
the interspaces finely reticulate ; declivity slightly flattened, margined below, gibbous at the sides above, 
with three or four setiferous tubercles on each elevated sutural border and several towards the outer 
limb, Underside piceous, legs testaceous. 
Hab. Panama, Volcan de Chiriqui (Champion). 
