Adult male red or purplish in colour, wings bluish-purple with red nervures; length, about 1/5in.; width across expanded wings, about 1/2in. Eyes large, prominent, facetted. Antennæ of ten joints, each joint bearing many hairs. Feet long, slender, with somewhat large trochanter; on the tibia and tarsus a fringe of hairs as in the female. Upper digitules two long fine hairs; lower digitules absent. The nervure of the wings branches twice at least. Haltere large, inflated, sac-like; bearing four curling setæ. Abdomen distinctly segmented, each segment bearing many fine short hairs and several small circular marks. Abdominal spike short, broad, bivalvular; penis protruding as a long soft white tube covered with minute recurved hairs. Habitat--For the adult female and larva the trunks of trees and shrubs in forests, or rocks and bushes in open country, Otago, Nelson, Canterbury, Wellington. For the second stage the stems and roots of _Muhlenbeckia adspersa (complexa?)_; Sumner Road, Lyttelton; Evans Bay, Wellington: _Rhipogonum scandens_ (supplejack); Riccarton Bush, Canterbury; Nelson; Wellington. On _Muhlenbeckia_ the waxy tests are often largest and most numerous underground. Male insects sometimes found clustering, attached to females. This is a very large and peculiar species, its transformations and changes of secretion being abnormal. It cannot be said to be greatly harmful; but the odour of the second stage is unpleasant. 67. Cœlostoma wairoense, Maskell. N.Z. Trans., Vol. XVI., 1883, p. 141. (Plate XXI., Fig. 2.) Adult female, female of second stage, and larva unknown. Adult male very nearly resembling that of _C. zealandicum_; body red or purplish, wings blue with red nervures. Length of body, about 1/6in. Eyes prominent, facetted. Antennæ of ten joints, slender, with fine hairs. Feet as in _C. zealandicum_, but with fewer hairs. Digitules twenty-four, all springing from the claw, none from the tarsus. Haltere, abdominal spike, penis, and abdomen as in _C. zealandicum_; but the circular marks on the segments in this species are multilocular. Male pupa bright-red, enclosed in a cylindrical sac of white cotton. Pupæ occurring in numerous colonies. Habitat--On _Phormium tenax_, _Leptospermum scoparium_ (manuka), Northern Wairoa, Auckland. The female of this species will, when found, probably nearly resemble that of _C. zealandicum_: at present the great number of digitules on the foot of the male sufficiently distinguish it. INDEX OF PLANTS AND THE COCCIDIDÆ ATTACKING THEM. This list is of course only approximate, as insects may at any time be found on other trees than those given. _Icerya Purchasi_ is omnivorous, and it has not been thought necessary to repeat it here against every plant in the list; but it has been set against some. The adult female of _Cœlostoma zælandicum_ may also be found wandering over numbers of native trees in forests.