Porphyrophora.
Adult females with antennæ of seven joints; covered with waxy or calcareous secretion
Margarodes.
Subdivision I.—ACANTHOCOCCIDÆ.
Female insects exhibiting in all stages the anal tubercles. Young larvæ free, naked, active. Females of second stage active, covered with thin cottony secretion. Adult females stationary; naked, or either resting on or covered with a thick cottony or felted secretion. Anal tubercles in all stages conspicuous, bearing terminal hairs. Anogenital ring inconspicuous, with fine short hairs. Body distinctly segmented.
Male pupæ enclosed in cottony or felted sac. Abdominal spike of adult usually short, with a curved appendage.
Genus: PLANCHONIA, Signoret, Ann. de la Soc. Entom. de France, 1868, p. 282.
Maskell, N.Z. Trans., Vol. XIV., 1881, p. 223.
Adult females enclosed in a sac, or test, of secretion so closely felted as to appear waxy; round the edge of the sac a double fringe of glassy tubes; apodous; antennæ absent. Anal tubercles present in all stages.
The differences between this genus and Asterolecanium (see above under Lecanidinæ) are not to be made out from external examination of the sac, nor without close investigation. It is possible, indeed, that Asterolecanium should be removed from the Lecanidinæ and united with Planchonia.