1. _Eriococcus araucariæ._ _a_, insects on twig of Araucaria excelsa (Norfolk Island pine); _b_, sac of female, upper side; _c_, sac of female, under-side, with enclosed shrivelled female and eggs; _d_, sac of male; _e_, adult female before gestation; _f_, extremity of abdomen, anogenital ring, and anal tubercles of female. 2. _Eriococcus hoheriæ._ _a_, insects on bark of Hoheria; _b_, sac of female, upper side; _c_, sac of male; _d_, adult female; _e_, extremity of abdomen and anal tubercles of adult female; _f_, foot of adult female; _g_, antenna of adult female; _k_, larva, ventral aspect; _m_, male; _n_, abdominal spike of male; _p_, antenna of male. [Illustration: PLATE XIV.] Plate XV. Fig. 1. _Eriococcus multispinus._ _a_, insects on leaf of Knightia; _b_, sac of female, upper side; _c_, sac of female, under-side, with enclosed insect; _d_, adult female, dorsal aspect; _e_, diagram of arrangement of spines on female; _f_, spines of female; _i_, antenna of female; _k_, head of male, upper side; _m_, abdominal spike of male. 2. _Eriococcus pallidus._ _a_, insects on leaf of Myoporum (ngaio); _b_, sac of female; _c_, adult female, dorsal aspect; _d_, part of abdomen of female; _e_, antenna of female. [Illustration: PLATE XV.] Plate XVI. Fig. 1. _Rhizococcus celmisiæ._ _a_, Insects on leaves of Celmisia; _b_, adult female dorsal aspect. 2. _Rhizococcus fossor._ _a_, Insects on leaves of Santalum (maire); _b_, elevation produced by insect on _upper_ side of leaf; _c_, female in pit on _under_-side of leaf; _d_, sac of male; _e_, adult female before gestation, from a pit; _f_, adult female from surface of leaf; _g_, female of second stage; _k_, marginal spines and tubular cotton of second stage; _m_, antenna of adult female; _n_, male; _p_, diagram of head of male, upper and lower sides shown together, four eyes and two ocelli; _s_, abdominal spike of male; _t_, antenna of male. [Illustration: PLATE XVI.] Plate XVII. Fig. 1. _Dactylopius alpinus._ _a_, Insects on twig of Veronica; _b_, adult female, dorsal aspect; _c_, female of second stage; _d_, anogenital ring; _e_, antenna of adult female. 2. _Dactylopius calceolariæ._ _a_, Insects on leaf of Phormium tenax; _b_, adult female, dorsal aspect; _c_, antenna of adult female. 3. _Dactylopius glaucus._ _a_, Insects on leaf of Coprosma; _b_, adult female, green variety; _c_, adult female, brown variety; _d_, sac of male; _e_, antenna of male. [Illustration: PLATE XVII.] Plate XVIII. Fig. 1. _Dactylopius poæ._ _a_, Insects on roots of Poa (tussock-grass); _b_, adult female; _c_, antenna of adult female; _d_, foot of adult female; _e_, anogenital ring and anal tubercles of adult female.