Plate III. Types of Last Abdominal Segments of the Diaspidinæ. Fig. 1. _Aspidiotus coccineus_ (after Comstock); no groups of spinnerets. 2. _Diaspis rosæ_; five groups of spinnerets. 3. _Mytilaspis cordylinidis_; five groups of spinnerets and single orifices. 4. _Mytilaspis pyriformis_; five groups of spinnerets, almost forming an arch. 5. _Chionaspis dysoxyli_; five groups of spinnerets. 6. _Poliaspis media_; eight groups of spinnerets. 7. _Fiorinia asteliæ_; arch of spinnerets. 8. _Fiorinia stricta_; five groups of spinnerets, the three upper groups almost forming an arch. [Illustration: PLATE III.] Plate IV. Fig. 1. _Aspidiotus atherospermæ._ _a_, insects on leaf of Atherosperma; _b_, adult female. 2. _Aspidiotus camelliæ._ _a_, insects on twig of Euonymus; _b_, adult female; _c_, _d_, puparia of female. 3. _Aspidiotus coccineus._ _a_, insects on rind of orange; _b_, adult female in puparium (overturned); _c_, puparium of male. 4. _Aspidiotus nerii._ _a_, insects on leaf of wattle; _b_, puparia, male and female. 5. _Diaspis Boisduvalii_, adult female (after Signoret). 6. _Diaspis rosæ._ _a_, insects on twig of rose; _b_, adult female; _c_, puparia, male and female. 7. _Diaspis santali._ _a_, insects on twig of pear; _b_, male and female puparia; _c_, last abdominal segment of female. [Illustration: PLATE IV.] Plate V. Fig. 1. _Mytilaspis cordylinidis._ _a_, insects on leaf of Cordyline australis (cabbage-tree); _b_, male and female puparia; _c_, adult female. 2. _Mytilaspis epiphytidis._ _a_, female puparium; _b_, male puparium; _c_, adult female. 3. _Mytilaspis drimydis._ _a_, insects on leaf of Drimys colorata; _b_, male and female puparia; _c_, adult female; _d_, marginal spinnerets. 4. _Mytilaspis leptospermi._ _a_, insects on bark of Leptospermum (manuka); _b_, male and female puparia; _c_, adult female. 5. _Mytilaspis pomorum._ _a_, insects on twig of hawthorn; _b_, female puparia; _c_, adult female; _d_, puparium overturned, showing enclosed female, _f_, and eggs, _e_. 6. _Mytilaspis pyriformis._ _a_, insects on leaf of Dysoxylon spectabile; _b_, male and female puparia; _e_, adult female; _d_, male; _e_, last three joints of male antenna; _f_, foot of male. [Illustration: PLATE V.] PLATE VI. Fig. 1. _Chionaspis citri._ _a_, insects on rind of orange; _b_, male and female puparia; _c_, adult female. 2. _Chionaspis dubia._ _a_, insects on fern-leaf (Pellæa); _b_, male and female puparia; _c_, adult female. 3. _Chionaspis dysoxyli._ _a_, insects on leaf of Dysoxylon; _b_, male and female puparia; _c_, adult female. 4. _Chionaspis minor._ _a_, insects on twig of Parsonsia; _b_, male and female puparia; _c_, adult female.