PSILONISCUS. 403 



presternum, the inner part of the propleurse, and the middle of the metasternum and of the first two 

 ventral segments, blackish-aeneous, the antennae fusco-ferruginous ; above and beneath sparsely clothed 

 with rather coarse, long, decumbent, yellowish-cinereous pubescence, the pubescence closer along the sides 

 of the prothorax, and forming patches here and there on the elytra and abdomen. Head thickly punctured, 

 a small space on the middle of the vertex excepted, sharply margined in front ; antennae short, extending 

 slightly beyond the hind angles of the prothorax, rather stout, feebly carinate, joint 3 very little longer 

 than 2, the two together not nearly so long as 4. Prothorax much longer than broad, subconical ; the 

 hind angles strongly produced, divergent, slightly incurved at the tip, not carinate ; the surface thickly 

 and irregularly punctured at the sides, very sparsely so on the disc, down the centre of which is an 

 impunctate space, obsoletely canaliculate behind. Elytra very elongate, narrowing from the base, the 

 sides almost straight, the apices truncate, the outer angle dentiform ; with rows of coarse, somewhat 

 widely separated punctures placed in shallow striae, the interstices convex and very sparsely, irregularly 

 punctate. Beneath closely punctured. 

 Length 15, breadth 3 millim. ( $ .) 



Hab. Costa Rica, Volcan de Irazu 6000 feet {Rogers). 



One female example. Allied to P. apicalis, but paler, the apex of the elytra not 

 infuscate, the pubescence sparser, the thorax very sparsely punctured on the disc, down 

 the centre of which (as in P. sticticus) there is a smooth space, the elytral interstices 

 smoother. The non-carinate hind angles of the thorax, &c, distinguish it from 

 P. sticticus. The patches of pubescence are more distinct towards the sides of the 

 elytra than on the disc. 



3. Psiloniscus apicalis. (Tab. XVIII. fig. 9, <j .) 



Psiloniscus apicalis, Cand. Monogr. Elat. hi. p. 4, t. 1. figg. 1, 1 a-c 1 . 



Hab. Mexico 2 , Orizaba (Salle), Misantla in Vera Cruz (Edge) ; Guatemala, Cerro 

 Zunil (Champion) ; Panama, Volcan de Chiriqui (Champion). — Ecuador (coll, Janson). 



We have numerous examples of both sexes of this species. The antennae in the 

 male are nearly half the length of the body ; in the female they scarcely reach the hind 

 angles of the thorax. 



4. Psiloniscus borborurus. 



Psiloniscus borborurus, Cand. Monogr. Elat. iii. p. 5, t. 1. fig. 2 \ 

 Hab. Mexico, Cordova (Salle x ). 



The type (?) of this species is still unique in the Salle collection. 



5. Psiloniscus brunneus. (Tab. XVIII. fig. 10, $ .) 



Psiloniscus brunneus, Cand. Monogr. Elat. iii. p. 6\ 



Hab. Mexico, San Andres Chalchicomula (Salle l ), Jalapa (Hoge), Omilteme in 

 Guerrero (H. H. Smith); Guatemala, Tecpan (Conradt). 



I have seen six examples of this species, including the types. The specimens 



3F2 



