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The chemical analysis of the secretionary covering of Dactylopius perniciosus
Published online by Cambridge University Press: 10 July 2009
Extract
The scale [scale here means both the insects and their ovisacs—F. C. W.] contains a small amount of wax which can be separated by solution in boiling alcohol, or better, petrol. From solution in the latter it yields, after recrystallization, a considerable proportion of a hard wax melting at 83°·5 and having a density of 0·970 at 15° C. This is in all probability Cerylcerotate. There is present a mixture of waxes of lower and indefinite meltingpoint.
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