450 SEEKICOKNIA. 



placed in almost obsolete striae, the striae deeply impressed on the basal declivity, the punctures fine, 

 becoming still finer at the apex and coarser at the sides ; the interstices almost flat, each with two very 

 irregular rows of fine punctures. Beneath sparsely punctured, the propleurse and the sides of the pro- 

 sternum more closely and very coarsely punctate ; fifth ventral segment in the male with a smooth oblong 

 depression on either side of the middle, limited inwards by a dense fringe of hairs. 



Var. The head, the disc of the prothorax in front, and the suture rather broadly from the base to the apex, 

 pitchy-black. 



Length lOf-13^, breadth 3-3| millim. (<?$.) 



Bob. Guatemala, EI Tumbador, Las Mercedes, Cerro Zunil, Capetillo (Champion) ; 

 Panama, Bugaba, Volcan de Chiriqui (Champion). 



Found in plenty at Cerro Zunil and Bugaba ; the variety is represented by a single 

 specimen from Cerro Zunil. The colour is rather variable, but the insect is always in 

 great part castaneous or rufo-castaneous. In some of the females from Bugaba the 

 third joint of the antennae is as long as the fourth, and the inner costa or plica in the 

 hind angles of the thorax is obliterated. The males differ from the females in the 

 sculpture and clothing of the fifth ventral segment, as well as in the length of the 

 antennae, &c. The localities for this species are all on the Pacific slope. 



4. Spheniscosomus cribrosus. (Tab. XX. fig. 6, j .) 



Moderately elongate, rather broad, shining, castaneous or piceous, sparsely clothed with decumbent yellowish- 

 cinereous hairs. Head very coarsely, closely umbilicate-punctate, the frontal carina rounded and 

 prominent ; antennae short, about reaching tbe hind angles of the prothorax in the male, shorter in the 

 female, ciliate on their inner edge in the male, the third joint almost as long as the iourth. Prothorax 

 broader than long, subparallel behind, the sides arcuately converging from the middle forwards ; the hind 

 angles considerably produced, sharply, longitudinally unicarinate, the carina long ; the basal sulci short ; 

 the surface coarsely, somewhat sparsely punctate — the punctuation becoming closer, coarser, and umbili- 

 cate towards the sides and apex, dense near the anterior angles, and fine on the basal declivity, — not or 

 feebly canaliculate behind, and with a space down the centre from the middle to the base impunctate. 

 Elytra two and three-fourtbs longer than the prothorax, and in front distinctly narrower than it, 

 narrowing from the base ; coarsely seriate-punctate, the punctures becoming much finer towards the apex, 

 and placed in almost obsolete striae, these becoming deeply impressed on the basal declivity, the interstices 

 flat, each with two irregular rows of fine, widely separated, punctures. Beneath thickly and very coarsely 

 umbilicate-punctate, the punctuation much finer along the middle of the metasternum and on tbe 

 abdomen. 



Length 10£-12|, breadth 3£-3f millim. ( rf $ .) 



Hah. Mexico, Jalapa (Hbge, Godman) ; Nicaragua, Chontales (Belt). 



Four specimens, three of which are from Mexico. This species is less elongate and 

 has a relatively wider thorax than any of the other Central-American forms. In both 

 sexes the thorax is subparallel behind, and the elytra are narrowed from the base. 

 The hind angles of the thorax are sharply, longitudinally unicarinate. The punctua- 

 tion is very coarse in the Mexican specimens, finer in the Nicaraguan example, 



