SOMOLEPTUS. 495 
but they differ from it in the structure of the terminal joint of the maxillary palpi, 
which in Somoleptus does not depart to any extent of importance from what obtains in 
Leptacinus. Somoleptus is probably peculiar to the tropical regions of the New World: 
and no doubt Leptacinus clavicornis and L. subtilis, Ev., and possibly also L. dedilis, 
Er., all of which are Colombian species, belong to it, Kraatz having erroneously 
referred them to Mitomorphus when he established that genus (Wiegm. Arch. xxv. 
p. 106). JZ. nitidus, Sharp, also is a Somoleptus. 
1. Somoleptus znescens. (Tab. XIII. fig. 8.) 
Fuscus, supra enescens, nitidus; antennarum basi rufa, pedibus testaceis; parce obsoletissime punctatus ; 
capite oblongo; abdomine apicem versus latiore. 
Long. 6 millim. 
Hab. GuatTeMALA, near the city, San Gerdnimo, San Joaquin in Vera Paz 
(Champion). | 
Head longer than broad, only very sparingly punctate, shining brassy, subtruncate 
behind, the hind angles being rounded. Thorax elongate and narrow, slightly narrowed 
behind, like the head of a shining brassy colour, sparingly and only extremely finely 
punctured. Elytra scarcely so long as the thorax, very shining, almost impunctate. 
Hind body with the margins of the segments sordid testaceous. Colour beneath 
infuscate testaceous, the breast being darker, and the head brassy, very shining, and 
with only a few fine distant punctures. The terminal ventral plate is broadly emargi- 
nate; in one sex the segment of the armature is very large, and consists of two lobes 
separated by a very long fissure, while in the other sex this segment is terminated by a 
small circular orifice. 
This species was found in plenty at San Gerénimo, and the examples exhibit only 
very slight variation. Found beneath dead leaves &c. on the sandy banks of streams. 
2. Somoleptus bicolor. 
Rufescens, nitidus; capite, elytris abdominisque apice nigricantibus, pedibus testaceis; capite suboblongo 
cumque thorace crebre subtiliter punctato, medio longitudinaliter levigato. 
Long. 54 millim. 
Hab. GuateMata, Capetillo, Quezaltenango 7800 feet (Champion). 
Head not very elongate, oblong, but slightly narrowed in front, and the hind angles 
a little rounded ; the surface rather closely punctate and finely pubescent, with a smooth 
space along the middle. Thorax distinctly punctate and pubescent, the punctuation 
slightly more distant than that of the head; a broad space along the middle, smooth. 
Elytra scarcely so long as the thorax, very finely and sparingly punctate. Hind body 
very finely and rather closely punctate and pubescent, the two terminal segments 
blackish. 
