Vol. V, No. 9.] Secretion of Phromnia marginella, Olivier. 365 
[V.S.] 
make no use a the deposit, which they say has a narcotic 
effect when e 
In April “ot this year Mr. Norman Gill, Superintendent of 
~~ Kumaon Government Gardens, forwarded to the Reporter 
n Economic Products some branches and leaves of a tree 
‘wax.’ The wax was prepared by dissolving the white de- 
posits in water, straining and evaporating, and had the consis- 
tence of toffee. It was remarked that from one to two pounds 
of this substance could be obtained from each infected tree. It 
identified as Eleodendron glaucum, Pers., which appea 0 
the chief host plant in the district. Some of the insects fell 
from the tree and colonised on the undergrowth below, more 
particularly on Vitex Negundo. The moths are found near the 
colonies, both on the tree above and on the bushes below, in 
various stages of development. The white, ragged-looking 
Sein fe sear icome stationary after a time, and moult as 
slight sweetish taste. They melted at 186°C., and ted 
ps they burnt with the odour of caramel, leaving no ash. 
boiling with dilute acid. A bape of “pe sugar afforded 
9°3 per cent. Carbon, 7°7 pe t. Hydrogen, and 53 per cent. 
Oxygen. The body is shésetore' duleivol (duleite), an isomeride 
of mannitol (mannite), C 
the occurrence of duletot ‘in the secretion of Phromnia 
@. The examination o species of Scrophularinee 
el that mannitol is present in 272 and dulcitol in 26 
