214 . CHAS. K. BRAIN. 



The scale of the adult $ is about 1"4 to 2 mm. long, flat, composed almost entirely 

 of the opaque black, hardened skin of the second stage and supplemented by a thin 

 whitish or brownish secretion, which is most conspicuous behind. The shape therefore 

 is + rectangular with rounded corners, that of the 2nd exuviae with the larval 

 exuviae extending for half its length in front and often turned to one side, opaque 

 black. Ventral scale complete, whitish or brownish. 



The puparium of the <$ is elongate, whitish or brownish, with larval exuviae black. 



The adult <j>> when mounted, is small, hyaline, readily distinguished from 

 P. proteus and pergandei by the following particulars (fig. 131) : — The margin of 

 the cephalothorax, near the articulation, bears a large rounded tubercle, marginal 

 tubercle of the abdominal segments numerous and comparatively long ; L ls L 2 

 and L 3 long, narrow, trilobed ; L 4 pointed as in P. pergandei, but better developed. 

 Circumgenital glands in 4 groups : — 



6—7 6—7 

 7—10 7—10 

 Formula : P 1; L 15 2P 2 , L 2 , 3P 3 , L 3 , 3P 4 , L 4 , 4-5P 5 . 

 L 4 in this species may be small and pointed as in P. pergandei or + lobe-like. 



Habitat : On orange, Durban and Port Elizabeth ; collected by C. P. Lounsbury. 



Collection No. : 283. 



Genus Aonidia, Targ. 



The genus Aonidia shows relationship with both Aspidiotus and Parlatorea. 

 The second stages of some species show characters that seem to be intermediate 

 between the two. It differs from both of these, however, in the fact that the adult 

 $ is entirely enclosed within the large, hardened skin of the second stage. As is 

 usual in cases where the second stage becomes large and hardened the dorsal scale, 

 i.e., secreted portion, is + transparent and scant, but firm and resistant. The 

 first exuviae are + central. The adult $ is generally viviparous and without circum- 

 genital glands, differing from that of Gymnaspis chiefly in the fact that the pygidium 

 is more highly developed and possesses definite lobes and plates. 



The puparium of the $ is somewhat similar to the scale of the female in size and 

 shape, or, in some cases, rather elongate, and consists of secretionary matter with 

 the larval exuviae at or near the centre. 



114. Aonidia simplex, Leon. (Plate xiv, fig. 135). 



Aonidia simplex, Leon., Boll. Lab. Zool. Portici, p. 209, 1914. 



Scale of adult $ about 1 "2 mm. long, buff, + irregular oval, moderately convex, 

 with yellowish or orange exuviae when young. When full-grown the colour is 

 determined by the hardened skin of the second stage $, which is rich chestnut-brown. 

 In this stage the dorsal scale is scant and appears whitish or greyish. The ventral 

 scale is robust, whitish or greyish. 



The puparium of the <$ is more slender than the $ scale, buff, with paler margins : 

 exuviae yellow or orange. 



