382 SEEKICOKNIA. 



it may be known by its opaque and more closely punctured thorax, the hind angles of 

 which are not divergent, and the more granulate elytral interstices. As in M. sobrinus, 

 there is an indication of a faint outer carina within the hind angles of the thorax. 

 M. asperatus has much the facies of a small Ludius. 



10. Megapenthes longitarsis. 



Elongate, rather narrow, feebly convex, subopaque, thickly pubescent ; black or brownish-black, the head in 

 front, and the prothorax with the base and the anterior and hind angles testaceous or ferruginous, the 

 scutellum ferruginous or pitchy-brown, the elytra pitchy-brown or obscure reddish-brown ; the under 

 surface in great part piceous ; the antennae fusco-ferruginous, the legs testaceous. Head convex, thickly, 

 finely punctate ; antenna? slender, in the male about half the length of the body, in the female extending 

 very little beyond the hind angles of the prothorax, joint 3 short, slightly longer than 2, the two together 

 not longer than 4. Prothorax much longer than broad, moderately convex, very gradually narrowing 

 from the base forwards, the sides a little rounded in front ; the hind angles acute, slightly divergent, 

 sharply unicarinate ; the surface very finely, rather sparsely punctate, with the interspaces minutely 

 reticulate and dull, obsoletely canaliculate behind. Elytra elongate, of the same width as the prothorax 

 at the base, and gradually narrowing thence to the apex, the sides a little rounded, the apices obtuse ; 

 finely and shallowly punctate-striate, the interstices almost flat, thickly punctured and subgranulate. 

 Beneath thickly punctured, the prosternum and propleurae more sparsely punctate ; posterior coxal plates 

 very broadly and angularly widened opposite the point of insertion of the femora. Legs elongate, slender, 

 the four hinder tarsi distinctly longer than the tibiae in the male. 



Length 7|-10|, breadth lf-2| millim. ( <$ $ .) 



Hab. Guatemala, Capetillo (Champion) ; Costa Rica, Volcan de Irazu (Rogers) ; 

 Panama, Volcan de Chiriqui (Champion). 



Found in numbers by myself at Capetillo. This insect varies a good deal in size and 

 colour. The thorax has the base and a large triangular patch on either side within 

 the hind angles testaceous, and sometimes there is a short median line of the same 

 colour behind. The elytra in one example are brownish-testaceous, with the sides and 

 suture darker. Some of the males are smaller, narrower, and more parallel than 

 others. M. longitarsis may chiefly be known from the allied forms by its elongate 

 shape and long legs. The insect is unknown to Dr. Candeze. 



11. Megapenthes melanotoides. (Tab. XVII. figg. 3, 2; 3«, antenna; 3b, 

 coxal plate.) 



Very elongate, rather narrow, shining, sparsely pubescent ; the head black, ferruginous in front, the prothorax 

 piceous, with the anterior angles, the base, and a short median line behind ferrugineo-testaceous, the 

 elytra obscure reddish-brown, with the epipleurae ferruginous ; the under surface in great part piceous ; 

 the antennae obscure ferruginous, the legs testaceous. Head convex, thickly punctured ; antennae ( $ ) 

 slender, extending to a little beyond the hind angles of the prothorax, joint 3 short, slightly longer than 

 2, the two together not so long as 4. Prothorax much longer than broad, very gradually narrowing 

 from the base forwards, the sides a little rounded in front ; the hind angles acute, slightly divergent, 

 sharply unicarinate ; the surface thickly, finely punctate, the punctures becoming still finer and more 

 scattered on the disc, the interspaces shining, distinctly canaliculate behind. Elytra slightly narrower 

 than the prothorax at the base, very elongate, gradually narrowing from the base, rounded at the apex ; 

 finely and lightly punctate-striate, the interstices almost flat, thickly punctured, and subgranulate. 



