148 



SCIENCE BULLETIN, No. 18. 



The female gall one-fourth of an inch in height, pyriform; apex with a 

 slit ; the lips curving outward on the sides. The male galls are reddish 

 brown, slender, tubular, slightly contracted at the serrate apex ; about 

 one-sixth of an inch in height, often covering the whole of the leaf. 



Adult female attached along the ventral surface to the bottom of the cavity 

 in the gall chamber; dorsal surface flattened, showing segmental divisions, 

 with impressed spots on either side of the first four segments ; anal one 

 .;apering into a tail clothed with scattered white hairs, hind legs very long; 

 tarsi thread-like. 



154. Opisthoscelis maculata. Cat. Coccidae, p. 46. 



Opisthoscelis mammularis, Froggatt (Fig. 104). 

 Pro. Linn. Soc. N.S.W., vol. viii, p. 344, pi. xvi, figs. 15-16, 1893. 

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



The male and female galls scattered over the foliage of an undetermined 

 species of Eucalyptus, Bendigo, Victoria. 



Female gall forming a somewhat wrinkled erect green excrescence on the 

 upper surface of the leaf, broadest at the base, narrowed about two-thirds 



up, and swelling out and rounded 

 on the summit. Height, one-fourth 

 of an inch. Opening into a reddish 

 brown wart on the under-surface of 

 the leaf. 



Male galls generally in groups of 

 three or four, somewhat similar in 

 form, but smaller and more conical. 



Adult female dull yellow to brown 

 in colour ; cephalic and thoracic 

 segments large ; abdominal seg- 

 ments very small, narrow, clothed 



with long curly white hairs ; those round the anal tail shorter and straight ; 



the tip of the anal segment bearing two small reddish brown spines curved 



backwards. Hind legs well developed ; tarsal joint three times the length 



of the tibiae. 



Fig. iOi.—Opistla 



:relii mainmularis, Froggatt. 

 $ Galls. 



155. Opisthoscelis marmnularis. Cat. Coccidse. p. 47. 



