THE COCCIDAE OF SOUTH AFRICA. — ill. 211 



Remarks : The scale of this species is somewhat like that of A. canariensis, 

 Lindinger. The two species appear to show further sinilarities and closer relationship 

 in the character of the gland openings, thick spines, and simple plates, but the lobes 

 are entirely different, canariensis possessing but one pair. There is also a striking 

 similarity between the pygidium of this species and the $ nymph of Howardia 

 silvestrii,~Leon., but the size is entirely different and the specimens I examined are 

 undoubtedly adult. 



Habitat : On Lycium afrum, Linn. (Solanaceae), Uitenhage ; collected by 

 C. P. Lounsbury, 1st August 1906 (Cape No. 1808). 

 Collection No. : 155. 



110. Pseudaonidia nigra, sp. n. (Plate xii, fig. 127). 



Scale of adult $ almost circular, flat, about 2 '8 mm. in diameter, black, sometimes 

 with paler, brownish margins. Exuviae small, pushed to the extreme margin, 

 appearing grey or brownish. In a few cases the position of the second exuviae is 

 indicated by an indefinite greyish patch. The whole scale is beneath the epidermis 

 of the leaf and appears as a black blister. For this reason it is not possible to 

 remove the scale by rubbing, nor to pick it up with the nail as can generally be done. 

 There is no indication of its presence on the lower side of the leaf. When the scale 

 is broken open it is noticed that it is capsular, and that the inside is slightly dusted 

 with white powdery wax. 



The body of the $ is wine-red in colour. When cleared and mounted the $ is about 

 1'7 mm. long and 1'4 mm. broad, widest at about the middle, broadly rounded in 

 front and tapering to the pygidial margin (fig. 127). 



The pygidial margin, anterior to the serrated portion, is twice indented, each time 

 having a conical, sharply pointed protuberance in front of it, from the bases of which 

 arise short strong spines. There are four pairs of distinct, separate lobes, and beyond 

 these the margin is strongly serrate, the first eight serrations on each side being almost 

 as large as the lobes. The median lobes are close together, moderately strong, with 

 both margins once strongly notched. L 2 about the same length as L t and L 3 , but 

 much narrower than either of these ; L 3 and L 4 similar in shape to L p but slightly 

 smaller and paler in colour. The plates are indistinct and appear to be simple ,with 

 blunt ends. There are four pairs of thickenings running into the pygidium ; the 

 inner pair, arising from between L x are the shortest and are slightly divergent and 

 indistinctly thickened, not clubbed as are the other three pairs. The second pair, 

 which arise between L x and L 2 are the longest and are distinctly clubbed. Pairs 3 and 

 4 are about equal in length and thickness (fig. 127). 



The antennal tubercles are small, each with one moderately long seta and perhaps 

 a short spur. Parastigmatic glands present, about 7-9 at each anterior spiracle. 



Circumgenital glands present, arranged in the form of a horse-shoe but slightly 

 interrupted in the middle, 17-23 on each side. 



Remarks. The true " mining " habit of this species is not common in leaf species. 

 In this respect this insect is very similar to Aspidiotus subcuticularis, Green, which 

 lives on Ficus sp. in Northern Australia. 



(C507) c2 



