THE COCCIDAE OF SOUTU AFRICA. 35 



with a few additional spines like those of the marginal series and a small group 

 of simple glands like the circumgenital glands of the Diaspinae. Anal plate heavily 

 chitinised, with scattered perforations. 



Habitat : On stams of quince, Stellenbosch, C.P. ; collected by F. W. Pettey, 

 July 1916. 



Collection No. : 91. 



237. Ceroplastes tachardiaformis, sp. n. 



Adult $ tests aggregated in huge masses on stems of the host-plant, often com- 

 pletely covering the stems for a distance of several inches. 



$ test Tachardia-hke, globular, sHghtly flattened above, hard, thin, brittle, 

 almost transparent resinous brown, due to the colour of the insect within ; without 

 protuberances but with a slight apical depression containing the opaque white 

 larval exuvia. 



Adult 9, denuded of wax, moderately dense, globular, smooth and shiny. Caudal 

 protuberance short, very dense, surrounded by a coarsely perforated plate. 



Antennae 6-jointed, e.g. (1) 34, (2) 27, (3) 74, (4) 20, (5) 17, (6) 30//. 



Legs short, e.g., coxa 50, femur + trochanter 110, tibia 78, tarsus 50//. 



Integument moderately dense, appearing, under the high power, finely rugose, 

 with numerous, widely scattered, small, transparent pores. Stigmatic clefts almost 

 obsolete, indicated by a small group (8 or 10) of short obconical spines and a few 

 simple glands. 



Habitat : On rhenosterbosch {Elytropappus rhinocerotis, Less.) ; collected by 

 Messrs. Watermeyer Bros., Aberdeen, C.P., November 1915. 



Collection No. : 94. 



238. Ceroplastes zonatus, Newst. 



Ceroplastes zonatus, Newstead, Bull. Ent. Res. viii, p. 32, 1917. 



" Female test. Broadly ovate in outline, highly convex ; marginal plates 

 very faintly indicated, but apparently without nuclear spots ; dorsal plate very 

 large, with a central nuclear spot of white wax ; cephalic margin slightly clypeate ; 

 lateral margins in very old examples with a pronounced foot-like extension from 

 each of the stigmata, from which there extends a thick white waxen appendage. 

 In the younger forms the foot-like extension is wanting, but the white waxfn appen- 

 dages are present and always porrected. Colour creamy white, suffused with very 

 pale brown ; dorsal plate surrounded by a shaded wavy zone of dark brown and 

 brownish black, with here and there a suffused patch of dull flesh- colour. In very 

 old examples the zone of colour extends to the margins and is of a shining madder- 

 brown to piceous colour. On the removal of the outer surface of the test with 

 chloroform, it is seen to be divided into seven areas by pale orange-coloured lines ; 

 a central polygonal area, corresponding to the area occupied by the dorsal plate, 

 from the angles of which radiate to the margin single lines marking off the areas 

 of the lateral and cephalic plates. 



" Female adult (denuded of the test). Ovate ; cephalic margin clypeate ; 

 dorsum low and wrinkled ; two large, bilateral, submarginal extensions, both 

 longitudinally striated ; the space between these extensions of the body-wall and 

 (GSl) ^2 



