Adult male red, about 1/20in. long; wings rather narrow, hyaline. Antennæ ten-jointed, hairy. Feet normal. Abdominal spike short, thick, and accompanied by a curved appendage; at each side a tubercle bearing longish setæ. Habitat--In crevices (and sometimes on surface) of bark of _Hoheria angustifolia_, on hills above the town of Lyttelton. About midsummer individuals may be found which have just completed their sac and have not yet become coated with the black fungus. The peg-top form and the four anal tubercles of this insect distinguish it from all others of the genus. 56. Eriococcus multispinus, Maskell. _Acanthococcus multispinus_, Maskell; N.Z. Trans., Vol. XI., 1878, p. 217; Vol. XII., 1879, p. 292; Vol. XVII., 1884, p. 29. (Plate XV., Fig. 1.) Sac of adult female yellow, felted, elongated-oval. Length, about 1/20in. Abdominal extremity open. Sac of male similar to that of the female. Adult female pinkish in colour, elongated-oval, convex, filling the sac, shrivelling at gestation; segmented, segments not conspicuous. Length, about 1/25in. Anal tubercles brownish, conspicuous, setiferous. Anogenital ring small, with eight fine hairs, which are often glued together by cottony secretion, forming a pencil between the tubercles. Antennæ of six joints. Feet having the tibia shorter than the tarsus;[S] digitules fine hairs. On the dorsal surface are a great number of conical spines, of which the largest are arranged in six longitudinal rows; from the spines sometimes protrude some cottony tubes with an expansion a little below the tip. [S] As a rule, a tibia shorter than the tarsus characterizes an insect not yet arrived at the adult stage. The genera _Eriococcus_ and _Rhizococcus_ sometimes present exceptions to this rule. See also, above, the genus _Eriochiton_. Young larva free, active, elongated-oval, flattish; spines as in adult. Adult male orange-red in colour; length, about 1/25in. Antennæ of ten joints. Abdominal spike short, thick, with a curved appendage. Feet normal. Habitat--On _Rubus australis_, Riccarton Bush, Canterbury; on _Knightia excelsa_, _Cyathodes acerosa_, Wellington. The very numerous conical spines distinguish this species from that known as _Acanthococcus aceris_, Signoret, the European species. There seems to be no sufficient reason why the genus _Acanthococcus_ should have been separated from _Eriococcus_, and they have been here reunited. The only difference mentioned by Signoret is the colour and texture of the sac, an unimportant character in this case. 57. Eriococcus pallidus, Maskell. N.Z. Trans., Vol. XVII., 1884, p. 29. (Plate XV., Fig. 2.) Sac of adult female yellowish-white, elongated-oval, convex, closed at both ends. Length, about 1/9in. Sac of male unknown.