12 SCIENCE BULLETIN, No. 19. 



narrow slit along the back of the coccid. The gall cavity is smooth above^ 

 with the bottom covered with white meal, upon which the coccid rests 

 Length of gall from ^ of an inch, and the thickness from 5^ to |- inch. 



Adult female fitting closely into the gall chamber, varying in colour from 

 olive green to brown or black, lightly covered with floury secretion. Length, 

 quarter of an inch. General form elliptical, about a quarter of an inch in 

 length. Antennae obsolete, only represented by minute tubercles ; legs 

 wanting. Four principal spiracles large ; epidermis covered with circular 

 spinneret orifices, thickest and largest on the dorsal surface. Anal ring 

 small, hairless; anal tubercules obsolete. 



372. Sphaerococcus leftospermi. Cat. Coccidse, p. 86. 



Sphaerococcus melaleucae, Maskell. 

 Trans. New Zealand Institute, vol. xxvi, p. 94, pi. vi, f. 15-20, 1893. 

 Sphaerococcus acacia var. melaleuca, Cockerell. 



These insects are not uncommon on the twigs of the titree {Melaleuca 

 liniariifolia), growing at Penshurst, Flemington, and similar localities in the 

 vicinity of Sydney. 



The adult females form no galls, but cover themselves with small masses 

 of roughened black waxy secretion, from which project smaller conical 

 processes of unequal length. Diameter of test, one-tenth of an inch. 



Adult female dull reddish pink; general form convex, elliptical, taper- 

 ing to the apex. Diameter, one-twentieth of an inch. The cephalic and 

 thoracic segments smooth, the abdominal ones smaller, tapering, and closely 

 marked with convoluted corrugations. Antennae composed of five very 

 short joints, the last somewhat globular, with several long hairs. Legs 

 wanting. Thoracic spiracles rather large and close to each a group of 

 circular spinneret-orifices. Epidermis bearing some circidar spinnerets. 

 Anal ring without hairs, anal tubercles absent, with no terminal setse or hairs. 



Sphaerococcus melaleuca. Cat. Coccidae, p. 85. 



Sphaerococcus morrisoni, Fidler (Fig. 7). 

 Journal West Australian Bureau Agriculture, vol. iv, p. 1346, 1897. 

 Trans. Ent. Soc. London, p. 450, pi. xv, f. 22, 1899. 



This species comes from Pinjarrah, West Aus- 

 tralia, where it forms galls on the tips of the 

 branchlets of a ti-tree {Melaleuca, sp.). 



Galls broadly oval, often in bunches of five 

 or six, greyish brown, with the surface roughened 

 with little bracts, constricted in the centre and 

 rounded to the apex, with a slight rim round 

 the small apical orifice. The interior of the gall is 

 divided into an upper and lower chamber. Length, 

 three-quarters of an inch ; diameter, half an 

 ^'^- '^•~ inch 



SphaerococcKS morrisoni. 



