BATRISINI 255 



communicating laterally with a pair of posterior sulci which curve 

 between occiput and antennal tubercles, each posterior sulcus termi- 

 nating basally in a deep glabrous fovea; 2.88 mm liljebladi 



Vertex not canaliculated as described 2 



2. Antennal segments IX and X oblong, longer than wide; no small 



pore-like foveae on sides of head behind eyes 3 



Antennal segments IX and X transverse ; each side of head with two 

 approximate, minute, pore-like foveae behind each eye; 1.6 mm. 

 panamensis 



3. Base of each elytron trifoveate; 2 mm globipennis 



Base of each elytron quadrifoveate 4 



4. Antennal segments II to VIII subquadrate to quadrate; 2 mm 



humeralis 



Antennal segments elongate; 2.25 mm rugipes 



Group III 



Only one species known in this group, fasciculatus Raffray 1.6 mm. 

 long from Bahia, Brazil, described on a male specimen with each elytron 

 trifoveate, simply convex pronotal disc and the pronotum distinctly longer 

 than wide. 



Group IV 



This is the largest, least understood group of the genus, containing ten 

 species. It is possible that centralis Sharp and reitteri Sharp belong in 

 Group II. Raffray (1904, p. 63) stated that he was unfamiliar with centralis 

 and (p. 104) placed Sharp's species in Group IV with simply convex pronotal 

 disc. I have followed Raffray in this designation although Sharp's figure of 

 reitteri might be construed as gibbous, in which case both Sharp's species 

 would have to be placed in Group II. A second suggestion for this transfer 

 is the parallel development of vertexal sulci between reitteri and liljebladi; 

 although the two species differ in numerous details one cannot help feeling 

 that Sharp's species are out of place with such forms as cavifrons, dentipes 

 and tibialis. Until Sharp's types can be examined I have left the original Raffray 

 list unchanged save for integration of new work. 



The following partial key to the species of this group follows: 

 Anterior part of vertex and front abruptly depressed, this depression 

 holding three large foveaform impressions arranged so that each 



impression forms one angle of a triangle; 1.5 mm cavifrons 



Anterior part of vertex and front not as described 2 



2. Base of each elytron with three foveae 3 



Base of each elytron with four foveae 4 



3. Intermediate femur not spined; 1.4 mm tibialis 



Intermediate femur with a curved spine near base on ventral face; 



1.5 mm ovipennis 



