XV, 3 
Banks: Two Philippine Bupresticls 
293 
to 25 millimeters more, and spread out as a blotch covering 
nearly the entire space between midrib and margin (Plate I, 
fig. 2). 
The tendency of the larva in mining is to proceed from the 
base to the apex of the leaf, but this is not the invariable course 
(Plate I, fig. 1). After it has made the main blotch mine, it 
invariably makes a second, very much smaller, chamber at a 
distance of from 10 to 15 millimeters, connected with the first 
by a gallery of an almost uniform width of 3 millimeters in 
nearly every instance. A third chamber may be made (Plate 
I, fig. 7), and even as many as four subsidiary chambers may 
be mined out by a single larva (Plate I, fig. 1) before it decides 
to pupate. It closes the entrance to this chamber by a lunate 
mass of compacted excrement (Plate I, figs. 2 and 3). Occa- 
sionally larvae mining in opposite directions will cross each 
other’s connecting galleries and continue in their determined 
direction. 
The thin epidermis of the leaf soon dries and becomes torn, 
leaving very large, jagged, brown-bordered scars which detract 
from the beauty of this very ornamental plant. 
FEEDING HABITS OF THE ADULT 
The adults of Endelus bakeri feed on the upper sides of the 
leaves in a very peculiar manner. They first eat out an oval 
space, devouring all of the upper epidermis and the paren- 
chyma, leaving the lower epidermis entire. When this oval 
space is about the size of the body of the insect, instead of 
continuing to feed from outside the space, it deliberately set- 
tles down in the center of the denuded spot and proceeds with 
its meal from the bare white space. It is difficult to see why 
it should feed in this very strange manner, because its dark 
body is much more conspicuous against the white spot than 
against the darker green of the leaf. 
It will be seen by reference to Plate III, fig. 2, that the white 
spots are located near the apex of the leaf; but this is not 
always the case, although the majority of them are found on 
the apical half of it. When a beetle is feeding it is not easily 
frightened from its repast and the hottest sunshine does not 
seem to annoy the insect. 
PARASITES 
The larva of Endelus bakeri is parasitized by at least one 
species of chalcis fly, the female puncturing the epidermis of 
the leaf and laying her eggs through the dorsal skin of the 
