155 
These differences of larve and pupx may be thrown, for con- 
venience, into a table as follows: 
SYNOPSIS OF LARVAE. 
1. Mandibles bifid at tip. 
a. Inner edge of mandibles excavated before tip, anal see- 
ments shorter than preceding, ventral tubercles not prom- 
inent. Paria. 
b. Inner edge of mandibles not excavated, anal segments more 
developed than preceding, ventral tubercles prominent, 
with long hairs. Colaspis. 
2. Mandibles entire at tip, inner edge excavated, anal segment short, 
ventral tubercles not prominent. Scelodonta. 
SYNOFSIS OF PUPA. 
1. Anal hooks simple, incurved. Colaspis. 
2. Anal hooks recurved. 
a. Hooks short and stout with strong erect tooth at upper 
side of base and two long hairs on posterior margin.— 
Scelodonta. 
b. Hooks slighter, simple, or with slender hair at upper side 
of base, no haus on margin. Paria. 
The beetles may be very easily distinguished, the Colaspis being 
usually of a pale clay-yellow, ranging to a yellowish brown, smooth 
but not shining, concolorous throughout, cr occasionally with the 
head and thorax green; while Paria is shining black above, varying 
to brown with four black blotches upon the wing covers, but always 
with pale legs; and Scelodonta is purple or green, with a bronzed 
metallic lustre, and covered with a gray pubescence, of which both 
the other species are destitute. 
I propose now to give the literature, descriptions and life histories 
of each of the species separately, as far as is necessary for the 
present purpose, and afterwards to treat of the injuries to vegetation 
and of measures for the control of all three of the species together. 
