AFRICAN APHIDIDAE — PART II. 137 



past the second pair of legs, dusky at the tip. First and second pair of legs close 

 together, the third further away. Cauda as in the alate female. Length, 2 mm. 



Larva (young).- — When newly born, faintly tinged with green ; dusky tubercles 

 and bristle-like hairs arranged in four rows. Eyes bright red ; legs and antennae 

 pale. Older larvae pale yellowish-green, with dusky tubercles and hairs arranged 

 in six rows. Legs faintly greenish ; tarsi smoky. Eyes red. Antennae with the 

 two basal segments pale yellowish-green ; third pale and faintly smoky towards 

 apex ; four to six smoky. Nymph uniform pale yellowish-green. Cornicles with 

 dark apical ring ; tubercles dusky. Fore wing-buds shaded. Femora pale yellowish- 

 green ; tibiae ochreous ; tarsi dusky. Eyes red. Antennal segments 1 and 2 

 pale yellowish- green, 3 and 4 pale, 5 and 6 smoky. 



Alate male. — Head and thorax olive-green ; abdomen pale yellowish-green, with 

 conspicuous black markings. Similar to alate female, but smaller, with more slender 

 body and the dusky tubercular areas on the dorsum of abdomen smaller. Head and 

 thorax with a number of hairs arranged more or less regularly. The cephaUc and 

 thoracic hairs are unknobbed or but inconspicuously capitate, and those on the 

 abdomen may also be capitate or not, being usually inconspicuously knobbed. 

 Eyes dark red or blackish. Antennae dusky to black, reaching a little beyond the 

 tip of the abdomen ; third segment with 13 to 16 oval sensoria, more or less in a row ; 

 the fourth with three to jB.ve ; the fifth with three to five, not including the usual 

 distal one ; and the sixth with one sensorium surrounded by several smaller 

 ones at the tip. Proboscis not reaching the second coxae. Venation as in the alate 

 viviparous female. Cornicles and cauda dusky, the latter edged with black ; form 

 as in the viviparous generation. Length, 1*3 mm. ; wing expanse, 4*1 mm. 



Oviparous female. — Apterous, general colour yellowish orange to orange when 

 fully mature. Body usually yellowish when first reaching maturity, but as the 

 ova, which are of an orange colour, begin to develop within the body they show 

 through the semi-transparent skin, giving the conspicuous orange colour to the 

 body.* Head and prothorax pale yellow ; meso- and meta-thorax varying from 

 yellow to orange according to age. Dusky tuberculate areas conspicuous. These 

 and the black capitate hairs arranged as on the stem-mother. Eyes blackish or 

 brownish black. Antennae not reaching the base of cornicles ; basal segments 

 concolorous with head, others gradually darkening toward apex. Legs pale 

 yellowish, except tarsi ; proximal halves of hind tibiae swollen and bearing 25 to 

 40 inconspicuous, irregularly placed, circular sensoria. Cornicles and cauda 

 concolorous with abdomen, often dusky at margins. Cauda knobbed as in other 

 forms, but the anal plate rounded at the tip and with no emargination. Length, 

 1*8 mm. 



Egypt : Kafr Zayat, 30. v. 1910 {F. Smith) ; Gizeh, 2.vi.l910 [F. C. Willcocks). 

 Also occurs in Europe, North America and India. 



Food-plants. Berseem (Trifolium alexandrinum), T. pratense, etc.. Ononis spinosus, 

 Medicago sativa. 



Redescribed from material sent me by Mr. Willcocks from Egypt, together 

 with his colour notes from living specimens. The colours of the Egyptian specimens 



* In the American specimens sent me by Davis the ova in the females were black. 



