1/ 



318 .SERRICOBNIA. 



/*. Protliorax and elytra deep black. 



a\ Abdomen black Species 36. 



V. Abdomen rufous Species 37. 



c. Mesosternum with the sides of the cavity subhorizontally raised, somewhat 

 abruptly declivous in front ; prosternal sutures shallowly grooved in 



front. Body above and beneath deep black Species 38. 



B. Antennae with the third joint small, not or very little longer than the second, 

 the antennae themselves very little longer in the male than in the female ; 

 mesosternum with the sides of the cavity not or feebly raised ; prosternal 

 sutures grooved in front. 



c'. Elytra without distinct markings Species 39-43. 



d'. Elytra with a black marginal stripe on the anterior half Species 44. 



e'. Elytra bifasciate Species 45. 



1. IschiodontllS Carinicomis. (Tab. XIV. figg. 7, <S ; 7 a, antenna ; 7 b, 



genitalia, d 1 .) 



Elongate, broad, convex, shining ; piceous, pitchy-brown, or obscure ferruginous, the hind angles of the 

 prothorax more or less ferruginous within, the epipleurae, antennae, and legs ferruginous ; above and 

 beneath rather sparsely clothed with moderately long yellowish-cinereous hairs. Head closely, coarsely 

 punctate, triangularly flattened or depressed in front, the frontal carina very prominent, rounded 

 anteriorly ; antennae less than half the length of the body in the male, a little shorter in the female, the 

 joints from the third considerably widened, becoming narrower outwards, above and beneath distinctly 

 carinate along the middle, 3 and 4 equal. Prothorax convex, broader than long, gradually narrowing 

 from the base, the sides a little rounded anteriorly in the male, more strongly so in the female ; the hind 

 angles strongly produced, slightly divergent, sharply carinate above ; the surface closely, coarsely 

 punctate, usually with a smooth narrow space along the middle extending from the centre to the base 

 impunctate, deeply canaliculate behind. Elytra moderately long, in both sexes subparallel to the middle 

 and narrowing thence to the apex ; rather coarsely punctate-striate, the striae (the first excepted) shallow ; 

 the interstices feebly convex (convex on the basal declivity), flat on the disc, sparsely, finely punctate. 

 . Beneath closely punctured ; prosternal sutures deeply excavate in front ; mesosternum declivous ; posterior 

 coxal plates triangularly dilated opposite the point of insertion of the femora. 



Length 14|-17|, breadth 4-4i millim. ( d § .) 



Hal. Guatemala, Teleman and Panzos in Vera Paz (Champion) ; Nicaragua, Chon- 

 tales (Belt, E. M. Janson) ; Panama, Bugaba, Volcan de Chiriqui, Los Remedios 

 ( Champion) . 



Numerous examples. This species is intermediate, as it were, between the South- 

 American /. puncticollis and 1". inbrnatus, Cand., both of which have the third and 

 following antennal joints distinctly carinate, a character not mentioned by Candeze in 

 his descriptions. It is, however, nearest allied to I. inornatus, from which it differs in 

 its much larger size, more elongate elytra, more depressed front, more prominent 

 frontal carina, and slightly longer antennae in both sexes. In general shape it re- 

 sembles L puncticollis. I have examined nine specimens of /. inornatus determined 

 by Candeze, and also many others recently found by Mr. H. H. Smith in the island of 

 Grenada. A male of /. carinicomis from the Volcan de Chiriqui is figured on our 

 Plate. 



