Indian Forest Records. 
68 
[VoL. 1. 
trees to wait for all the larvae to issue — a period reaching to nearly a 
month. 
2. Dr. D. Hooper’s Analyses. 
Three carefully selected samples were submitted to Dr. Hooper for ana- 
lysis, as follows : — 
(а) Young living larvae which had swarmed out of the cells of lac grow- 
ing in the Raipur Forests, Central Provinces, during the last 
week of February 1907. 
(б) Stick-lac from which the larvae had swarmed in November after 
the lac had been plucked. This lac came from the Saharan- 
pur forests in the United Provinces. 
(c) Stick-lac from which the larvae had swarmed in February before 
the lac had been removed from the trees. This lac came from 
the Raipm forests in the Central Provinces. 
The questions put to Dr. Hooper were : — 
(1) Do lac larvae consist almost entirely of what we know as lac-dye ? 
(2) Does the lac incrustation sent contain lac-dye, and if so, in what 
proportion ? 
Dr. Hooper’s analyses and remarks were as follows : — 
(a) Analysis of the young living larvce. — ‘ ‘ I received your most inter- 
esting samples of lac larvae. They were all ahve and well when 
they arrived, and I at once commenced to subject them to the 
process of chemical analysis. The larva lost 54 per cent, of 
water when dried to constant weight in the water even at 
100°C. The dried larvae contained approximately the 
following main constituents : — 
Wax and fat . . . . . . . . 1‘5 
Soluble colouring matter . . . . . . . 48'0 
Insoluble albumen . . . . . . . . 42'0 
Ash .......... 8’5 
lOO’O 
‘ ‘ The insects contained therefore about half their weight of red 
colouring matter, ’or a ratio of 143 to 100 of albuminous remains. 
In the analysis of samples of lac given in the paper in the Indian 
Trade Journal the relation of red colour to the insoluble portion 
was 25, 23, 33 and 20 to 100. These figures are not sufl&ciently 
