THE VICTORIAN NATURALIST. 



region. Lateral margins of abdominal segments produced into 

 rounded lobes. Pygidium broadly rounded. Median lobes 

 conspicuous, prominent, divergent, the extremity expanded and 

 somewhat malleiform. First lateral lobes simple, prominent, 

 narrow, pointed. Other lobes obsolete. Spiniform squames well 

 developed ; but other spines obsolescent. Anus anterior to 

 genital orifice. Circumgenital glands in five groups — median 6 

 to 8, upper laterals ii to 17, lower laterals 17 to 20. Con- 

 spicuous series of oval pores on sides of pygidium, and numerous 

 smaller pores on sides of abdominal segments and metathorax. 

 Length, i to 1.50 mm. 



Adult male not observed. 



Habitat. — On leaves of Callistemon salignus, Candolle. 

 Myrniong, Victoria. (No. 61.) 



Ch. Candida is readily separable from all its allies by the form 

 of the pygidial lobes. Without a knowledge of the male puparium 

 this species might have been assigned to the genus Mytilaspis ; 

 but the keeled scale definitely indicates its present position. 



Sph^rococcus pustulans, sp. nov. (fig. 8). 



Female insects living beneath flattish blister-like swellings on 

 surface of bark. An isolated pustule measures 4 to 5 mm. in 

 diameter, is roughly circular, with a small median pore. The 

 walls of the cell are stout, and of a corky nature. The cavity is 

 comparatively small, and lined with a whitish film. When 

 crowded the pustules becomes confluent, and lose their circular 

 form. 



Adult female circular or broadly oval. Segments ill defined. 

 Antennae small and atrophied ; conical ; with 2 (sometimes 3) 

 broad basal segments, and a much wrinkled terminal joint 

 bearing several stout hairs. Legs small ; the joints much 

 swollen and wrinkled ; tibio-tarsal articulation obscure, indicated 

 by a median constriction ; claw proportionately large, stout, 

 curved, with a denticle near the tip on inner edge. Rostrum 

 moderately large. Macerated examples show an ill-defined 

 median darker area on the dorsum. No glandular pores or 

 spinnerets. Some inconspicuous scattered hairs on the derm, 

 slightly larger on the hind margin. Anal and genital orifices 

 obscure, close to posterior extremity, the former with a slightly 

 thickened chitinous dorsal lip. Diameter averaging 2 mm. 



Male not observed in any stage. 



Habitat. — On bark of Eucalyptus goniocalyx, F. v. M. 

 Myrniong, Victoria. (No. 52.) 



The habitat and habits of this species resemble those of Sph. 

 elevans, Mask., which also inhabits blister-like cells in the bark of 

 Eucalypitus. But elevans is distinguished by the absence of 

 limbs, and by the presence of a complicate rosette pattern on the 

 dorsum. The presence of legs is exceptional in the genus 



