150 SCIENCE BULLETIN, No. 18. . 



Opisthoscelis serrata, Froggatt. 



Pro. Linn. Soc. N.S.W., vol. viii, p. 343, pi. xvii, figs. 24-26, 1893. 

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



Female galls upon the foliage of an undetermined species of eucalyptus > 

 Bendigo, Victoria. 



Female galls green, tinted with yellow ; spherical, constricted at the l^ase, 

 with the opening on the under-surface of the leaf forming an irregular slit in 

 the centre of a wart ; soft and spongy. Height and diameter, quarter of 

 an inch. General appearance like that of 0. subrotunda. 



Adult female pale yellow, elongate, rounded ; the outer margins of the 

 thoracic and abdominal segments serrate on the dorsal margins, with a row 

 of fleshy teeth right round to the anal extremity, with the body swelling 

 out beneath. Abdominal segments lightly fringed with hairs. Antenna) 

 ferruginous, springing out of the cephalic fold, showing four irregular joints. 

 The fore and middle pair of legs present, but aborted ; hind pair well developed 

 with the typical long filiform tarsal joint. 



150. Opisthoscelis serrata. Cat. Coccidse, p. 47. 



Opisthoscelis spinosa, Froggatt. 

 Pro. Linn. Soc. N.S.W., vol. viii, p. 34, pi. xvi, figs. 10-12, 1893. 

 Agric. Gazette, N.S.W., vol. ix, p. 498, 1898. 



Male and female galls scattered over the foliage of the large-leafed iron- 

 hark {Eucalyptus siderophloia), Flemington, New South Wales. 



Female gall shaped like a large rose thorn, dull brown, broad at the base, 

 tapering to the extremity, slightly truncate, with a very small apical opening 

 at the tip. Often scattered about singly on the leaves, but sometimes in 

 (•.lusters of two or three, when they abort the foliage, twisting the leaves 

 round. Height, quarter of an inch; diameter at base, quarter of an inch. 



Male galls forming small wrinkled rounded excrescences on the leaves, 

 clustered together or solitary. About one-twelfth of an inch in height. 

 The opening on the underside as in the female galls. 



Adult coccid fixed to the bottom of the gall like O. maskelli; reddish yellow, 

 the dorsal surface clothed with curly white hairs, interspersed with long ones, 

 forming a fringe round the margins, to the rounded tail. Traces of aborted 

 antennfe, fore and middle legs; hind pair stout, mottled with yellow and 

 black ; tarsal joint very long and slender. The gall has a somewhat similar 

 form to that of 0.' maskelli, hut is easily distinguished from the latter in always 

 being on the leaf, and having no rings round the apex. 



160. Opisthoscelis spinosa. Cat. Coccidse, p. 47. 



