AFRICAN APHIDIDAE — PART II. 



109 



tibiae pale with dark apex ; tarsi dark ; tibiae and apical area of the femora hirsute. 

 Cornicles long, thin, cylindrical, slightly expanding basally ; pale, apex dusky and 

 marked ^ith a few reticulations, remainder imbricated. Cauda pale, not quite half 

 the length of the cornicles, bluntly pointed, spinose, with three pairs of lateral hairs 

 and one median dorsal subapical one ; anal plate dusk}', with two pairs of lateral 

 hairs, and beneath it a large dusky plate rounded on the posterior border, \vith three 

 lateral pairs of long hairs, this plate not quite reaching to the end of the cauda. 

 Length, 2 5 mm. ; wing expanse, 7 mm. 



Cape PROVI^XE : Cape Town, 23.x. U {G. Bedford). 



Food Plant. Ivy (Hedera helix). 

 Described from a single perfect alate female found with Aphis hederella. sp. n. Its 

 colours had gone in the spirit, but it appears to be of dark hue. It can however at 

 once be distinguished by the marked posterior plate beneath the cauda and anal 

 plate, a character which perhaps might place it in a new genus. I have never seen 

 anvthing resembling it in the Aphididae before. Type in the writer's collection. 



Macrosiphum rosaefoiium, sp. nov. (fig. 4). 



? Siphonophora rosaecoJa, Passerini. 



Alate viviparous female. — Green ; thoracic lobes dark ; antennae dark brown, 

 paler in places. Cornicles green ; cauda green ; anal plate dusk}'. Legs green, 

 TN'ith dark apices to the femora and tibiae and dark tarsi. Antennae as long as the 

 body, arising from prominent frontal tubercles ; the basal segment larger than the 



second 



the third longer than the fourth and about as long as the sixth, with 17-20 



Fig. ^. JIacrosiphum rosaefoiium, 8p. n. ; A, antenna of apterous §; 



B, cornicle ; C, cauda. D, head and antenna of alate x ; 



(?,, head, showing larger frontal tubercle; E, cornicle; F, cauda. 



sensoria. more or less in a line along its whole length ; fourth segment longer than the 

 fifth, with 5-9 sensoria in a line ; sixth not quite as long as the fourth and fifth 

 together, its basal area about one-fifth the length of the flagellum ; all the segments 

 faintly imbricated ; the third to the sixth darkest, the former pale just at the base ; 

 apices of the fourth and fifth slightly darkened ; hairs few, very short and blunt. 

 Head shghtly projecting in the median line in front, with a few short hairs, blunt in 

 form. Eyes large and black. Proboscis scarcely reaching the second coxae, pale, 

 its tip dusky. Cornicles green, dusky at the tips, long, thin, cylindrical, imbricated, 

 with one or two striae at the apex ; not as long as the third antennal segment. Cauda 

 long, narrow, lanceolate ; about two-thirds the length of the cornicles and projecting 



