Genera and Species of Phytophaga. 235 
nigris; harum articulis duobus ultimis magnis, valde in- 
crassatis, difformibus. 
Long. 33 lin. 
Hab. Java. 
Head as in the last species ; antennz very robust, joints in- 
creasing in thickness from the fourth to the ninth, fourth to the 
eighth inclusive short, slightly compressed, subtrigonate, fur- 
nished, as in P. apicalis, with an acute ridge on their inner edge ; 
ninth rather thicker, equal in length to the fourth; tenth and 
eleventh large, greatly thickened, nearly equal, forming conjointly 
more than a third of the whole length of the antenna, the inner 
surface of each deeply excavated, the excavations smooth and 
shining, the one on the tenth irregular and armed with two coarse 
teeth; terminal joint acute. Thorax more narrowed in front 
than in P. apicalis; surface smooth, impressed in front with a 
longitudinal groove, and on either side, behind the middle, with a 
broad transverse depression. Elytra very minutely punctured ; 
basilar space bounded below by a curved depression, Hinder 
tibize armed on the inner edge, just before the apex, with a curved 
styliform process. 
Platyxantha ventralis. 
Elongata, modice convexa, parallela, fulva, nitida; pedibus 
antennisque pallidioribus; harum articulis duobus ultimis 
crassis, intus excavatis, concoloribus; oculis abdomineque 
piceo-nigris. 
Long. 33 lin. 
Hab. Mount Ophir, Singapore. 
Head shorter than in either of the two preceding species ; fore- 
head less depressed, the part above the insertion of the antenne 
between the upper portion of the eyes occupied by two indistinctly- 
raised subquadrate spaces ; antennz intermediate in size between 
those of P. apicalis and nigricornis, joints coarsely punctured, 
third to the eighth nearly equal both in length and thickness, the 
ninth much shorter than the eighth, tenth and eleventh much 
thickened, together nearly equal in length to a third part of the 
whole antenna, the eleventh half as long again as the tenth, its 
apex acute, both joints deeply excavated on their inner sides. 
Thorax distinctly but finely punctured; disc impressed on either 
side behind the middle with an oblique fovea; sides nearly straight 
and parallel, narrowed just behind the anterior angles. Elytra 
distinctly punctured; basilar space bounded beneath and laterally 
