2. _Pseudococcus asteliæ._ _a_, Insects on leaf of Astelia; _b_, adult female, dorsal aspect; _c_, antenna of adult female; _d_, foot of adult female; _e_, various spinnerets. [Illustration: PLATE XVIII.] Plate XIX. _Icerya Purchasi._ _a_, Insects on twig of Acacia (wattle); _b_, adult female and ovisac, upper view; _c_, adult female and ovisac, side view; _d_, female of second stage; _e_, larva, with yellow cotton; _f_, male; _g_, haltere of male; _k_, two joints of male antenna; _m_, hairs, spinnerets, and glassy tubes; _n_, antenna of adult female. [Illustration: PLATE XIX.] Plate XX. _Cœlostoma zælandicum._ _a_, adult female, dorsal aspect; _b_, adult female, ventral aspect; _c_, waxy tests of females of second stage on twig of Muhlenbeckia; _d_, female of second stage, dorsal aspect; _e_, female of second stage, ventral aspect, with anal tuft of cotton and seta; _f_, larva, with yellow mealy secretion; _g_, eggs, in cottony mass; _k_, antenna of female, second stage; _l_, foot of female, second stage; _m_, antenna of adult female; _n_, spiracle and trachea of female; _p_, anal extremity and "honeydew" organ of larva and female of second stage. N.B.--The foot of the adult female is shown in Plate I., Fig. 6. [Illustration: PLATE XX.] Plate XXI. Fig. 1. _Cœlostoma zælandicum._ _a_, male insect; _b_, abdomen of male; _c_, foot of male; _d_, hairs and marks, abdomen of male; _e_, antenna of male; _f_, circular marks, abdomen of male; _k_, abdominal spike and penis of male; _m_, haltere of male. 2. _Cœlostoma wairoense_. _a_, male insect; _b_, head of male, upper side, with facetted eyes; _c_, foot of male; _d_, circular marks, abdomen of male. [Illustration: PLATE XXI.] Plate XXII. The Honeydew, and resulting Fungi. Fig. 1. _a_, Lecanid female (Ctenochiton) with protruded honeydew organ; _b_, abdominal extremity of the same, enlarged, the drop of honeydew bursting in spray. 2. _a_, fungoid growth on upper side of leaf; _b_, fungoid growth on twig; _c, d, e_, various forms of black fungi from honeydew. [Illustration: PLATE XXII.] Plate XXIII. Parasites of Coccididæ. Fig. 1. _a_, pupa of hymenopterous parasite; _b_, the same pupa under the waxy test of _Ctenochiton perforatus_; _c_, imago, or full-grown parasite. 2. _a_, brown and yellow fungi on _Ctenochiton viridis_ (leaf of Hedycarya dentata); _b_, upper side of brown fungus; _c_, under-side of the same, with attached fungoid sheet; _d._, _Ctenochiton viridis_ (test removed) filled with yellow fungus, and with globular mass of the same above it. [Illustration: PLATE XXIII.]