AFRICAN APHIDIDAE — PART II. 



119 



Aphis hederella, sp. nov. (fig. 14). 



Alate viviparous female. — Evidently a dark- coloured species, with paler abdomen. 

 Antennae much shorter than the body ; the two basal segments dark ; the third dark, 

 except the base ; apex of fourth and fifth dark and all the sixth ; the basal segment 

 wider than, but of almost the same length as the second ; the third a little longer than 

 the fourth, but shorter than the sixth, with a row of 6 round sensoria on one side, 

 extending from near the base to the apex ; fourth and fiith equal ; the sixth as long as 

 the fourth and fiith, its basal area not quite half the length of the flagellum ; the 

 usual sensorium at the apex of the fifth and at the apex of the nail on the sixth ; 

 segments all imbricated. Head flat in front ; eyes large ; stemmata, 3. Proboscis 

 reaching past the second pair of legs. Wings ample, with brown veins and stigma. 

 Cornicles rather short, black, expanded basally and with flared tips, about the length 

 of the Cauda, imbricated. Cauda black, spinose, with three long hairs on each side. 

 Anal plate black. Legs pale, with dark apices to the tibiae, dark tarsi and traces of 

 darkening on the apices of the femora ; a few hairs on the tibiae and apex of femora, 

 one on the basal segment of the tarsi and one near the apex of the last segment, 

 which is imbricated. Length, 15-18 mm. 



Fig. 14. 



Aphis hederella, sp. n. ; A, antenna of alate ?; B, cornicle; 

 by papilla between cornicle and cauda ; C, cauda. 

 D, antenna of apterous $; E, cornicle. 



Apterous viviparous female. — Dark. Antennae shorter than the body, the two 

 basal segments dark ; the third and fourth and base of the fifth pale, its apex and the 

 sixth dark ; basal segment much wider than, but about the same length as, the second ; 

 the third longer than the fourth, but not quite as long as the sixth ; fourth and fifth 

 equal, the latter with a sub-apical sensorium ; the sixth with the basal area half as long 

 as the flagellum, with the usual sensoria at their junction ; all the segments from the 

 third imbricated. Head rounded in front, with a few hairs. Cornicles deep black, 

 thick, sHghtly expanded basally, imbricated, longer than the cauda. Cauda and anal 

 plate black, spinose, the former with three pairs of long lateral hairs. A distinct 

 lateral tubercle on each side of the prothorax, a smaller one between the second and 

 third pairs of legs and a dark one between the cornicles and cauda. Legs rather 

 short and thick ; tibiae with hairs ; one on the basal tarsal segment and two on the 

 last segment, which is imbricated. Length, 1-1 -6 mm. 



Cape Province : Cape Town, 23.x. 13 {G. Bedford). 



Food-plant. Ivy {Hedera helix). 

 (C177) c2 



