190 APODERUS INCANA, MB. 
known, The insect when found was egg-laying and for this 
purpose it attacks the leaves of both the oaks, Quercus tncana 
and Q. dilatata, 
The ? beetle lays its egg in the left-hand corner of the apex 
of the leaf, The latter is then, in the case of the Quercus 
tncana, either cut across two-thirds of the way down the leaf, 
the cut being made on both sides from the exterior edge hori- 
zontally inwards till it meets the midrib, or the leaf is cut right 
across from one side to very near the edge of the other, a small 
piece of the leaf tissue only being left. In either case the por- 
tion above the cut is folded inwards down the midrib and then 
rolled up from the apex downwards, the outer edges being 
tucked in so as to form a neat little cylinder which remains 
suspended to the lower part of the leaf by the uncut portion. 
(See fig. 7, b,c.) This latter is however, whether midrib or leaf 
tissue, nicked across so asto ensure the little roll of leaf tissue 
dropping to the ground when it has become dry. In the case of 
the Quercus dilatata the procedure is much the same except 
that the leaf appears to be almost invariably cut lower down 
(fig. 7, ¢.). 
The little leaf rolls soon turn black as the tissue decays 
andare then very conspicuous upon the trees. Itis probable 
that a small white or yellow curved grub hatches out of the egg 
and feeds upon the decaying leaf tissue of the roll, and subse- 
quently when this latter has fallen to the ground, burrows into 
the earth to pupate. This part of the life history has, however, 
yet to be studied.) 
The insects may be observed egg-laying for about three 
weeks during May, but the number of eggs laid by each 
female has yet to be ascertained. - 
Locality from where reported. 
Throughout-Jaunsar Bawar and the adjacent Native States 
of Tehri-Garhwal, Jubal and Balsan this insect was very plenti- 
ful in rgol. 
Relations to the Forest. 
The peculiar method of laying its eggs adopted by this 
insect results in the trees attacked being very heavily defo- 
* Compare the life history of the species of Apoderus attacking the Sissu 
(Dalbergia Stssoo) tree described in No. 1, pp. 33, 34 of these notes. 

