322 SEKKICORNIA. 



intermediate joints slightly infuscate in one specimen, the epipleurae and legs ferruginous; above and 

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

 punctate, deeply transversely depressed in front in the male, feebly so in the female, the frontal carina 

 prominent, rounded anteriorly ; antennae half the length of the body in the male, much shorter in the 

 female, the joints from the third considerably widened, becoming narrower outwards, 3 and 4 equal. 

 Prothorax broader than long, convex, the sides gradually converging from the base, a little rounded 

 anteriorly ; the hind angles moderately produced, slightly divergent, carinate above ; the surface very 

 sparsely, finely punctate, canaliculate behind. Elytra nearly four times as long as the prothorax, parallel 

 to the middle and gradually narrowing beyond, the apices conjointly rounded ; with rows of rather fine 

 scattered punctures placed upon almost obsolete striae ; the interstices flat on the disc, feebly convex at 

 the sides, and convex on the basal declivity, very sparsely punctate. Beneath sparsely punctured ; pro- 

 sternal sutures deeply excavate in front ; mesosternum declivous ; posterior coxal plates triangularly 

 widened opposite the point of insertion of the femora. 

 Length 10^-12, breadth 2|-3 millim. ( tf $ .) 



Hob. Costa Rica, Volcan de Irazu (Rogers). 



Two females and one male. Closely allied to I. anceps, Cand., but differing from 

 that insect in its narrow subparallel shape in both sexes, the antennae less elongate in 

 the male, the elytra relatively more elongate. 



11. Ischiodontus atricornis. 



Elongate, rather convex, shining ; extremely variable in colour — usually brown or reddish-brown, with the 

 head black, and the apical third of the elytra indeterminately, and often the sides also, more or less 

 infuscate ; the prothorax obscure rufous, often with an infuscate patch on the anterior part of the disc, 

 sometimes entirely rufous, or piceous with the hind angles only lighter ; the elytra sometimes piceous, with 

 the suture brownish or ferruginous ; the antennas black or infuscate ; the legs and under surface ferru- 

 ginous or fusco-ferruginous ; above and beneath thickly clothed with long yellowish-cinereous hairs. 

 Head coarsely, closely punctate, triangularly depressed in front, deeply so in the male ; the frontal carina 

 prominent, rounded anteriorly ; antennae about half the length of the body in the male, shorter in the 

 female, the joints from the third considerably widened, becoming slightly narrower outwards, 3 and 

 4 equal. Prothorax broader than long, the sides converging from the base, a little rounded ante- 

 riorly ; the hind angles strongly produced, sharp, carinate above ; the surface rather sparsely, coarsely 

 punctate, the punctuation denser at the sides, canaliculate behind, and with a narrow smooth space down 

 the middle. Elytra moderately elongate, gradually narrowing from the base in the male, more parallel 

 in the female ; rather coarsely punctate-striate ; the interstices feebly convex at the sides, flatter on the 

 disc, convex on the basal declivity, and sparsely punctured. Beneath somewhat thickly punctured • 

 prosternal sutures deeply excavate in front ; mesosternum declivous ; posterior coxal plates trian°Tilarly 

 dilated opposite the point of insertion of the femora. 



Length 8|-13|, breadth 2-3| millim. ( J $ .) 



Hab. Mexico, Tapachula in Chiapas (Edge) ; Guatemala (Salle, Rodriguez), near 

 the city (Salvin), Las Mercedes, San Isidro, Zapote, Capetillo (Champion) ; Panama 

 Bugaba, Volcan de Chiriqui (Champion). 



Collected in abundance by myself at Capetillo. Closely allied to /. anceps, Cand., 

 but with the antennae infuscate or black, and less elongate in the male, the joints from 

 the third not so sharply serrate and more equal in width, the elytra more gradually 

 narrowed in this sex ; the thorax is usually in part, or entirely, pitchy-red, and 

 the elytra are brown or reddish-brown, with the apex and sides indeterminately 



