Adult females active, covered with mealy secretion; antennæ of seven joints; no hairs on anogenital ring. Eyes of male not facetted. This subdivision, which includes the single genus _Coccus_, of which there would seem to be not more than one distinct species--_Coccus cacti_ (the cochineal insect)--and two or three varieties, has not yet any representatives in New Zealand. Subdivision IV.--MONOPHLEBIDÆ. Adult females active or stationary; naked, or covered with mealy, cottony, or waxy secretion; segmented; antennæ of ten or eleven joints; anterior pair of feet similar to the rest; anogenital ring without hairs; anal tubercles inconspicuous. Males with facetted eyes and no ocelli. Strictly speaking, the wings of the males of this group should, according to its name, present only a single nervure. This, however, is not the case, or, rather, it should be said that the nervure is precisely similar to that of all other Coccids, branching once, so that it cannot form a distinctive character. Possibly the name of _Monophlebus_ was originally given by Leach to an abnormal or imperfect specimen. Genus: ICERYA, Signoret. Adult females having antennæ of eleven joints; covered with thin mealy secretion or with cotton; stationary; with or without ovisac. Rostrum and mentum present. Segmentation inconspicuous. Adult males without tassels on the abdomen; antennæ with two dilations on each joint. Two species only of this genus are at present known, the one described below and another, _I. sacchari_, infesting sugar-canes in Mauritius. The male of the latter is unknown. Possibly researches in Australia might result in the discovery of others. 65. Icerya Purchasi, Maskell. N. Z. Trans., Vol. XI., 1878, p. 221; Vol. XVI., 1883, p. 140; p. 140; Vol. XVII., 1884, p. 30; Vol. XIX., 1886, p. 45. _The "Cottony-cushion Scale."_ (Plate XIX.)