STEREODERMUS. 15 
the antenne by two shining processes which nearly meet, the part above these short 
and rather obsolete; eyes extending towards the base of the head. ‘Thorax more 
cylindric than in S. pygmeus, and shining at the sides as well as above, deeply constricted 
near the front and deeply sulcate along the middle; finely and distinctly punctured. 
Elytra with the second and third strie much as in 8. pygmeus, the fifth more distinctly 
carinate; the outer portion very shining, the punctures subobsolete and rather 
distant. Head beneath with a circlet of small scales at the extreme base, and with a 
small fovea in the middle just in front of them; perfectly polished and shining, and 
without serial sete; the pterygia bearing a series of erect scales, which, being continued 
forwards, become visible from above as previously described ; two short channels on 
the middle of the pterygia. Metasternum feebly, abdomen deeply depressed; the 
latter with the apical segments quite shining. Front tibie with the notch very 
indistinct, the process above this almost absent. 
Two specimens. 
14. Stereodermus calvus, sp.n. (Tab. I. fig. 11, head, rostrum, and antenna.) 
Elongatus, dilute piceus, nitidus; antennis crassis, articulis 9° et 10° quadratis; capite utrinque post oculos 
haud barbato; prothorace vix punctulato, antrorsum angustato; elytris fortiter punctatis, intervallis 
nullis carinatis. 
Long. 54-74 millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
Joints 2 to 8 of the antenne transverse, ninth and tenth each almost square, terminal 
joint distinctly longer. Head rather narrow; eyes elongate, but not very convex, no 
setee visible between them and the hind margin; groove deep, connected with the back 
of the head by a channel; the hind angles projecting somewhat backwards and, as it 
were, free; the sides of the groove shining throughout, divided in front so as to form 
four very definite carinules between the insertions of the antenne. ‘Thorax much 
narrowed in front, the transverse constriction deep and definite, the surface very 
shining. Elytra quite shining; the third interstice not in the least dull, the fourth 
indistinct, the fifth slightly more raised than the cvarse series of punctures between it 
and the fourth, but not at all carina-like; the punctures on the outer part of the 
elytra large. Front tibie with only a shallow, but distinct emargination. Under surface 
of the head shining, with only a feeble groove along the middle; the pterygia scantily 
setigerous. 
Five specimens. 
15. Stereodermus nigriceps, sp. n. (Tab. I. fig. 12, antenna.) 
Gracilis, rufescens, nitidus, vertice nigro; rostro longiore ; oculis haud prominulis; thorace subtiliter punctato ; 
elytris nitidis, subtiliter punctatis, intervallo quinto nullo modo carinato. 
Long. 5 millim. 
Hab. Guatamata, Capetillo (Champion). 
