The chemical analysis of the secretionary covering of Dactylopius perniciosus

Publisher: Cambridge University Press

E-ISSN: 1475-2670|1|2|141-141

ISSN: 0007-4853

Source: Bulletin of Entomological Research, Vol.1, Iss.2, 1910-07, pp. : 141-141

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Abstract

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.