300 
of the Anthribide. 
RHYNCHOPHORA. 
will, however, be found useful in determining the insects. 
Key to the Genera. 
A. Antennal groove lateral: PLEUROCERINE. 
a. 
h. 
. Antenna with long bristles 
Lateral carina of prothorax extending to apex . 
Lateral carina of prothorax not reaching apex . 
. Apex of rostrum with rounded mesial sinus . 
Apex of rostrum without mesial sinus. 
. Ventral edge of mandible with tooth . 
Only the dorsal edge with tooth . 
. Antennal groove open . 
Antennal groove covered . 
. Club of antenna consisting of three segments 
Club of antenna consisting of four segments . . . . 
Eye entire, often obliquely truncate in front, sometimes dorsal 
Eye distinctly sinuate, always lateral . 
. Eye lateral, truncate in front, broader than long, coarsely granu- 
lated ; 
almost open ; 
Eye rounded or oblique ; 
covered by the upper edge, which is carinate . . 
Rostrum subcylindrical at base, widened at apex, but not much 
flattened ; . 
Rostrum flat, at least at apex, often very short. 
antennal groove close to eye, triangular, widest above, 
prothoracic carina basal . 
antennal groove separate from eye or 
eye lateral . 
Eye nearly circular, subtruncate in front; three strong dorsal 
carine on rostrum See ee ee ee 
Eye nearly circular, subtruncate in front; one distinct dorsal 
carina on rostrum 2 oe re : 
Eye elliptical, coarsely granulated ; one distinet dorsal carina on 
rostrum . re 
Eye elliptical, lateral; rostrum spatulate . 
Eye obliquely truncate in front or dorsal . 
Antenna without bristles; elytra flattened at suture; frons tri- 
angular... 1 ee ee we ee eee le 
Antenna without bristles; elytra flattened at suture; frons not 
triangular we ee soe ee 
Antenna without bristles ; elytra not flattened at suture 
Tibiz very rough with long thick hairs 
Tibize not long-hairy . . 
. Eye finely granulated, oblique, dorsal or subdorsal, its upper + edge 
more or less distinctly incurved, the edge of the frons forming a 
kind of eyebrow 
Eye evenly rounded above 
b. 
C. 
Genus No. 
Genus No. 
Genus No. 
d. 
ée. 
f 
Genus No. 
Genus No. 
g. 
E 
Genus No. 
Genus No. 
Genus No. 
k. 
l. 
Genus No. 
Genus No. 
Genus No. 
Genus No. 
Genus No. 
m. 
The appended key to the genera represented in Central America 
XXII. 
XXIII. 
XXI. 
IV. 
XX. 
