1104 ON THE CARENIDES, WITH DESCRIPTIONS OF NEW SPECIES, 
A. Elytra circular, or sub-circular, almost 
or quite as long as wide, with flattened 
space behind the humeral angles, usually 
emarginate at base. Anterior tibiae 
bidentate externally. 
Euryscaphus. 
B. Elytra ovate, at least a quarter longer 
than wide, without flattened space 
behind humeral angles. Anterior tibiae 
bi- or tridentate externally. Carenum. 
a. Anterior tibiae tridentate externally. 
b. Two supra-orbital punctures. 
Elytra costate near lateral margins Philoscaphus. 
Elytra foveate Laccopterum. 
Elytra smooth, bipunctate towards 
apex Calliscajjterus. 
bb. One supra-orbital puncture. 
Prothorax convex, posterior angles 
rounded, sinuate behind Chariscapterus. 
Prothorax rather flat, posterior angles 
square, ti’uucate behind Platythorax. 
aa. Anterior tibiae bidentate. 
c. Anterior femora with a puncture 
below and near the apex on inner side. 
d. Frontal sulci sub-parallel, or only 
slightly divergent behind. 
e. Clypeus truncate between the lateral 
teeth Carenum. 
dd. Frontal sulci linear, diverging con- 
tinuously behind. 
ee. Clypeus with slight median excavation. 
f. Antennae sub-moniliform, incrassate to- 
wards apex. 
Basal punctures in single row Carenoscaphus. 
Basal punctures placed irregularly near 
humeral angle Eutoma. 
