234 CHAS. K. BEAIlSr. 



The scales of this species, both $ and Q. are similar to those of Dinaspis lounsburi/i, 

 Leon., but the insect itself differs from that species in having the anterior part of 

 the body less chitinised, in a few of the pygidial characters, and in the possession of 

 circumgenital glands. 



Habitat : On witgatbooni (Cap par-is albitrunca, Burch.), Cape Peninsula 1 ; 

 collected by C. Fuller, 1898. 



Collection No. : 146. 



138. Chionaspis retigera, Ckll. (Plate xvi, fig. 162). 



Chionaspis retigera, Ckll., The Entom, xxxiv, p. 249, 1901. 



Professor Cockerell's description is as follows : — 



" Scales crowded on twigs ; white, the exuviae orange-brown. $ scale 

 mytiliform, about 1J millim. long, straight or curved, very convex, the transverse 

 growth-lines rather conspicuous ; second skin more or less covered with white 

 secretion, rj scale of the usual shape, rather broad, with a barely indicated median 

 keel ; exuviae bright orange. 



" $ dark brown, subpyriform, or rather club-shaped, the anterior end being much 

 narrowed ; median lobes rounded, very low, rudimentary, but conspicuous because 

 of their dark colour ; two other lobes barely indicated by low rounded structures ; 

 spine ordinary ; squames long and spine-like ; anal orifice far from the hind end ; 

 five groups of circumgenital glands, the posterior laterals about 10, anterior laterals 

 about 8, median 6 ; submarginal region with large reticulated patches, transversely 

 elongate, making the five posterior segments, the last pair longitudinally elongate, 

 and situated about the region of the lateral circumgenital glands ; mouth-parts 

 large. 



" $ second skin. Mouth-parts between the anus and the hind margin of the body ; 

 median lobes large, quadrate, separated by a rather wide interval ; margin on each 

 side of median lobes strongly serrate ; squames long and spine-like. Some 

 individuals of the third stage, presumably not quite mature, show also the large 

 quadrate median lobes, with wavy-truncate ends." 



After examining a large number of specimens I am convinced that the large quadrate 

 median lobes are normal for this species. The typical form of pygidium is illustrated. 

 The large reticulated patches mentioned by Professor Cockerell are the large 

 collections of dorsal gland openings. Circumgenital glands in 5 groups : — median 

 6 — 10, anterior laterals 8 — 12, posterior laterals 10 — 14. 



Habitat : On a number of native plants, including witgatboom (Capparis albitrunca, 

 Burch.), Durban, Natal, and East London, OP. 



Collection No. : 143 and 143a. 



139. Chionaspis euphorbiae, sp. n. (Plate xvi, fig. 156). 



Scale of adult $ about 2 mm. to 2 '5 mm. long, white, gradually broadening to 

 beyond middle ; posterior end + flattened and broadly rounded, straight or slightly 

 curved. The scale is not glossy, but shows numerous small transverse ridges, which 

 are close together and generally greyish owing to the collection of foreign matter. 

 First exuviae pale, brownish, second exuviae covered. 



