GYMNOBARIS. 421 
Kirsch, from Bogota *, also belongs to it. They are all oblong, somewhat flattened, 
polished, subglabrous forms, with widely separated anterior coxe, finely striate elytra, 
a non-sulcate, convex or flattened prosternum (much as in Onychobaris), non-sulcate 
femora, and an elongate antennal club. ‘The sternal structure approaches that of the 
Madarides, but the mesosternum is in great part exposed. 
1. Gymnobaris brevidens, sp. n. (Tab. XXI. figg. 1, la, ¢.) 
Elongate, flattened above, very shining, black, the tarsi and the base of the antenne reddish or piceous ; the 
punctures of the under surface and legs each bearing a very minute scale. Head minutely punctate ; 
rostrum arcuate, moderately stout and about as long as the head and prothorax in the 9, a little shorter 
and thicker in the g, sparsely, finely punctate, smoother in the 9, the antenne inserted at (2) or 
beyond ( 3) the middle, the club long and stout. Prothorax subquadrate, constricted and much narrowed 
in front; sparsely, minutely punctate. Scutellum almost smooth. Elytra long, but little wider than 
the prothorax, very gradually narrowing from the rounded humeri; feebly striate, the striee 2-4 very faint 
or obsolete and each represented by a row of fine punctures, the sutural stria somewhat deeply impressed 
and conspicuously punctate from a little below the base to the apex, the interstices very broad, flat, and 
with excessively minute widely scattered punctures. Beneath sparsely punctate. Prosternum somewhat 
convex. Anterior femora deeply and abruptly excavate near the apex and armed with a short tooth. 
Length 33-42, breadth 13-2 millim. (¢ 9.) 
Hab. Nicaragua, Chontales (Janson: 3); Panama, Bugaba, Volcan de Chiriqui 
(Champion: 3 @). 
Four specimens. An elongate, flattened form, with a subquadrate prothorax and 
faint or almost obsolete dorsal strize on the elytra, the sutural stria from a little below 
the base conspicuously punctured and more deeply impressed than the adjacent strie. 
The anterior femoral tooth (which is wanting in G. planipectus and G. nigerrimus) is 
formed by the abrupt subapical excavation. 
2. Gymnobaris planipectus, sp. n. 
2. Oblong-ovate, flattened above, very shining, black, the punctures of the under surface and legs each 
bearing an extremely minute scale. Head minutely punctate; rostrum as long as the head and 
prothorax, moderately stout, finely punctate, the antenne inserted at the middle, the club long and stout. 
Prothorax transverse, gradually and obliquely narrowing from the base, constricted in front; sparsely, 
minutely punctate. Elytra oblong-subtriangular, very little wider than the prothorax; finely punctate-striate 
throughout, the interstices flat, with excessively minute scattered punctures, which become uniseriately 
arranged towards the sides. Prosternum broadly flattened, slightly depressed down the middle, but without 
trace of a definite sulcus. Anterior coxe separated by more than their own width. Femora unarmed. 
Length 3, breadth 12 millim. 
Hab. Guatemata, Volcan de Atitlan 3000 feet (Champion). 
One female, captured in Dec. 1880, in the vicinity of the coffee-plantations at San 
Agustin. Smaller and less elongate than G. brevidens, the elytra distinctly punctate- 
striate throughout, the anterior femora unarmed, the prosternum slightly depressed. 
G. nigerrimus (Kirsch), from Bogota, has a narrower prothorax, longer and more 
convex elytra, and less widely separated anterior coxe. 
* This insect is compared by Kirsch with Limnobaris T-album (L.), notwithstanding that the latter has 
the pygidium covered in both sexes. 
