AFRICAN AL'HIDIDAE. 



325 



undoubtedly subject to much variation in colour and in the relative length, 

 thickness and form of the cornicles in both apterae and alatae, but the structural 

 characters given here are the same in all. One or two show pale cornicles and 

 pallid tarsi, as figured by Del Guercio, but the majority have black tarsi. The 

 hexagonal sculpturing of the cuticle is very marked. Several forms sent have 

 thick hind tibiae, and these are evidently oviparous females, although they have 

 no sensoria. Apterae sent from Zanzibar from cotton are clearly the same 

 species. 



In spite of the different form of the cornicles figured by Dj! Guercio there 

 seems no reason to doubt the identification. Lounsbury records a black aphis 

 on oranges at the Cape. It may refer to this species or to Toxoptera aurqntiae, 

 which occurs with it. Lounsbury speaks of it as Siphonophora sp.? (Leaflet no. 

 2, Dept. Agric. Cape Col. 1896) and states that it is preyed upon by Chilomenes 

 htnata. 



It lives beneath the leaves and on the shoots and blossoms, causing the leaves 

 to curl up and become much deformed. 



- fTTTl V a hJ'JTlJmJZJITXSTXix^ 



c^^^^^m^^msk 



B 



TTT7HH 



7, 



jJlMin^^ 



ZuSSZIDaSSElirE-r^^ 





_.-a. 



Fig. 7. — Aphis solanella, Theo. ; (A) head and antenna, (B) cornicle, and (C) cauda of alate 9 ; 



(D) head and antenna of apterous <£ > («) prothoracic papilla, (b) sensoria on 6th segment ; 



(E) cauda of apterous 9 5 (F) large papilla (a) in front of third leg (ft), with small anterior 

 papilla (c). 



Aphis solanella, sp. nov. (Figs. 7, 8.) 



Alate viviparous female. — Head black ; antennae not as long as the body, the 

 two basal segments and the sixth dark, especially the two first, the third segment 

 a little longer than the fourth, the fourth a little longer than the fifth, the third 

 with 16 to 18 sensoria scattered over its whole length, the fourth with 0-4 

 sensoria. Eyes black. Proboscis dusky at the apex. Pronotum yellowish 

 green ; thorax black. Abdomen green to greenish brown, with dark median 

 cross-bars, four black lateral spots and a prominent one between or just caudad 



