SCIOPORUS. 563 
Closely allied to S. stgnatus, but with a different punctuation of the head and 
thorax, especially the former, where the punctures leave the disc quite shining, and 
become scanty towards this smooth spot, the hind angles being, however, densely and 
rugosely punctate. The thoracic punctuation is coarse but subobsolete, the smooth 
space down the middle is finely canaliculate behind. The fuscous mark on the wing- 
cases is ill-defined. ‘The unique example was not labelled with the locality. 
5. Scioporus apicipennis. 
Niger, nitidus, antennis, pedibus elytrorumque apice testaceis; capite prothoraceque fortiter punctatis, hoc 
medio linea angusta levigata. 
Long. 4 millim. 
Hab. Panama, Bugaba (Champion). 
Antenne rather short and slender, slightly thicker at the apex; second and third 
joints equal in size, the seventh to the tenth each not so long as broad. Head rather 
short, quadrate, very slightly narrowed behind, the eyes a little convex, occupying one 
half the length of the side, the surface shining, very coarsely punctate. Thorax slightly 
transverse, very slightly narrowed behind, very coarsely but somewhat obsoletely and 
not densely punctate, with a rather indefinite smooth space along the middle. Elytra 
elongate, rather shining, somewhat sparingly and finely punctate, black, with the apical 
margin yellow. Front tarsi rather strongly dilated. On the right mandible the two 
upper teeth are very small, on the left the upper tooth is very minute. Unique. 
6. Scioporus obsoletus. 
Fuscus, capite nigro, prothorace piceo, antennis, pedibus elytrisque ferrugineis, his disco infuscato; capite sat 
fortiter disperse punctato, prothorace obsolete punctato. 
Long. 43 millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
This species is very closely allied to S. signatus, but is readily distinguished by the 
absence of coarse punctuation on the head and thorax. The head is shining, has no 
very large punctures, and the moderately large punctures are very scanty on the middle 
and front, but on the vertex, especially at the sides, form a very dense confluent 
punctuation, while the thoracic punctuation is rather fine and obsolete; the large 
fuscous mark on the wing-cases is rather indefinite. Unique. 
7. Scioporus chontalenus. 
Piceus, nitidus, antennis pedibusque testaceis, elytris ferrugineis, apicem versus obscuratis ; capite prothorace- 
que parce obsolete punctatis. 
Long. 43 millim. 
Hab. Nicaragua, Chontales (Janson). 
Antenne rather long. Head with the hind angles well marked, the surface only 
4 CC 2 
