234 Mr. J.S. Baly’s Descriptions of uncharacterized 
thorax, the dilated joints at the apex of the antennz, together 
with the peculiar lobe or process at the apex of the hinder tibie, 
will readily separate it at once from all other known genera. 
Although I possess three distinct species, all collected by Mr. 
Wallace, I unfortunately know apparently only the male sex. 
Platyxantha apicalis. 
Angustato-elongata, pallide fulva, nitida; antennarum articulis 
duobus ultimis, scutello, genubus, tibiis, tarsisque nigris. 
Long. 4 lin. 
Hab. Sumatra. 
Head flattened and strongly compressed, oblong-elongate ; epis- 
tome slightly thickened, triangular, truncate at the base, its sur- ; 
face smooth, the centre being traversed by a longitudinal ridge ; on 
the front, just above the insertion of the antenna, is a short per- 
pendicular groove, which is bounded above by a transverse im- 
pressed line; at the point of junction between the two is a 
single fovea. Antennee moderately robust; third and six follow- 
ing joints gradually decreasing in length, the ninth, tenth and 
eleventh joints moderately thickened, the tenth nearly equal in 
length to the ninth, the eleventh somewhat longer, its apex pointed; 
on the upper edge of each joint from the third to the ninth in- 
clusive is a raised ridge, this is replaced on the last two joints by 
an elevated, ovate, cup-like space. Thorax scarcely longer than 
broad ; sides nearly parallel, running slightly outwards from their 
base to beyond their middle, then curving slightly inwards to their 
apex ; upper surface deflexed on the sides, especially in front, 
remotely and finely punctured ; disc flattened and impressed with 
three large ill-defined fovea, the first larger than the others, 
broadly ovate and extending from the apex to below the middle, 
the two others smaller but more deeply impressed, placed trans- 
versely one on either side the hinder portion of the disc, just in 
front of the posterior margin. Scutellum triangular, its apex 
rounded. Elytra not depressed below the base, finely punctured. 
Hinder tibize produced on the inner edge, just before the apex, 
into a slightly curved lobiform process, the apex of which is armed 
with a small incurved tooth. 
Platyxantha nigricornis. 
Elongata, parallela, rufo-picea, nitida; capite thoraceque obscure 
fulvis; oculis, pedibus antennisque (articulo basali excepto) 
