19, 5 Heller: New Philippine Coleoptera 583 
In judging the sculpture of Mecistocerus, the state of pres- 
ervation of the squamosity must be considered. If it is in 
perfect condition, then the punctures of the elytral strize 
Seem to be round, small, and remote; but when it is scraped 
off, they appear to be quadrate or rectangular-oblong, separated 
only by a narrow cross-bridge. 
Key to the Philippine species of the genus Mecistocerus including 
Rhadinomerus. 
a’. Rostral canal extending backward at least to hind border of inter- 
TUCO CORN og cg ae ce M. marci Boh. 
a’. Rostral canal not extending backward as far as hind border of inter- 
mediate coxe. 
b*. Sides of prothorax set with a series of longer diverging bristles. 
M. sollicitus Faust. 
6°. Sides of prothorax without such bristles. 
ce’, Prothorax with a distinct smooth central carina. ‘ 
d’. Posterior femora not strikingly compressed at base; prothorax 
without a pale lateral stripe. 
e’. Elytra with a more or less extended pale humeral spot. 
f’. Elytra depressed" along suture, shoulders obliquely truncate 
and distinctly broader there than base of thorax; posterior 
femora extending beyond apex of elytra; third and fourth 
sternites blackish scaled except for a subquadraie pale 
lateral spot M. ingenuus Faust. 
f’. Elytra not depressed along suture, moderately broader at 
shoulders than base of thorax. 
g’. The coarse punctures of first and second sternites bearing 
a fine seta, those on femora a strong bristle; posterior 
femora pale with a dark median band. 
M. nigrostriatus Chevr. 
g’. The coarse punctures of first and second sternites, like | 
those of femora, set with similar setiform scales, pos- 
terior femora chiefly blackish scaled with a subapical 
white spot M. montanus sp. nov. 
e’. Elytra without a pale humeral spot. 
h*. Strie of elytra narrower than the intervals. 
i. Thorax globose, subtransverse, slightly constricted toward 
base, densely and deeply, moderately coarsely punctate; 
intervals of elytra flat. 
M. setosipes sp. nov. (Rhadinomerus). 
. Thorax nes globose, transverse (6.6 : 9), coarsely punctate; 
intervals of elytra subconvex, partly subgranulose. 
; ' MM. modestus sp. nov. 
h*?. Striw of elytra as broad as intervals; thorax somewhat flat- 
tened, very coarsely punctate............ M. latiuseulus sp. nov. 
“Easy to decide by a view from behind toward the front along the 
suture, 
