SCALE INSECTS ( COCCID^ ") OF AUSTRALIA. 149 





Opislhoscelis maskelli, Froggatt (Fig. 105). 



Pro. Linn. Soc. N.S.W., vol. viii, p. 340, pi. xvii, figs. 6-9, 1893. 

 Agric. Gazette N.S.W., vol. ix, p. 497, 1898. 



This is the common gall in the vicinity of Sydney upon the foliage of the 

 large-leaved ironbark {EucalyjHus siderophloia). 



Female galls like rose thorns, springing from young branchlets, leaf stalks, 

 and the midrib of the leaf ; the basal portion green ; apical portion brown, 

 with several rings round the apical orifice towards the summit. Height 

 up to half an inch ; diameter at base one-third of an inch. 



Male galls reddish brown, tubular, broadest at the base, 

 tapering towards the truncate tip, which is ringed with 

 five little teeth ; about one-sixth of an inch in height ; 

 sometimes single, at other times thickly covering the 

 whole surface of the leaf. 



Adult female bluish grey, oval ; convex on the dorsal Fig. 105. 



surface; abdominal segments small, curving upward; 

 legs black ; the tarsal joint long, filiform and turning over the back on 

 either side ; tail hidden, short. Under-surface firmly attached to the bottom 

 of the gall. Length, quarter inch ; diameter, one-sixth ot an inch. 



156. Opisthoscelis maskelli. Cat. Coccidse, p. 47. 



Opisthoscelis pisiformis, Froggatt. 



Pro. Linn. Soc. N.S.W., vol. viii, p. 343, pi. viii, figs. 13-14, 1893. 

 Agri\ Gazette N.S.W., vol. ix, p. 498, 1898. 



Female galls upon the leaves, and the male galls upon the leaves and twigs 

 of Eucalyptus rohusta and E. resinifera, Sydney; on E. melliodora, Bathurst, 

 New South Wales. 



Female galls small, soft green globular excrescences upon the upper surface 

 of the leaf, with the opening enclosed in a reddish wart on the under-surface. 

 Height, one-sixth of an inch. 



Male galls conical, brown, broadest at the base, tapering to the truncate 

 apex. Height, one-sixth of an inch. Apical orifice oval, irregular. 



Adult female salmon pink, resting on the roof of the gall, slightly attached 

 by head to gall. Head and thoracic segments rounded; the cephalic portion 

 standing out , much wrinkled ; abdomen elongate ; the last segment produced 

 into a small conical tail, bearing two short recurved reddish spines tipped 

 with black. The dorsal surface and sides fringed with long hairs. Legs 

 loag, slender, tarsal joint very long, filiform. 



158. Opisthoscelis pisiformis. Cat. Coccidae, p. 47. 



