An Account of the Insects Noxious to Agriculture and Plants in New Zealand / The Scale Insects (Coccididae)

by William Miles Maskell

Secretion felted, appearing only in the last stage, after gestation

Signoretia.

Secretion felted, forming a nearly complete sac on adult female before gestation

Lecanodiaspis.

Secretion felted, forming complete sac on adult female

Philippia.

Secretion cottony, covering adult female only after gestation

Lichtensia.

Secretion cottony, forming a complete sac on adult female before gestation

Eriopeltis.