108 



FRED. Y. THEOBALD. 



Apterous viviparous female. — Green, somewhat darker in the middle. Antennae 

 long, thin, green, tips of the third, fourth and fifth segments dark brown to black, 

 the sixth darker with a still darker band at the jimction of the nail and base of the 

 flagellum. The first segment is larger than the second ; the third has two to four 

 sensoria near the base ; the fourth and fifth nearly equal ; the sixth as long as the 

 fourth and fifth. Cornicles black, nearly one-third the length of the body, cyhndrical, 

 shghtly expanding at the base, in some turned outwards at the tips, but usually 

 straight, apex reticulate, the rest imbricated, reaching beyond the cauda. Cauda 

 pale, long, about half the length of the cornicles, with six prominent lateral hairs and 

 some others. Proboscis reaching to the third pair of legs, pale, last two segments 

 dark, and about equal in length. Legs with smaller dark apical areas than in the 

 alate female. Letigth, 2-2'5 mm. 



British East Africa : Xairobi (T. J, Anderson). 



Food-plant. — Garden peas and a native pea. 



Described from several alate and apterous females. The black cornicles and pale 

 long Cauda are very marked. No colour notes were sent, but some examples had 

 more or less presented their general hue. In the spirit specimens I noticed that 

 a pale band runs across between the cornicles and turns forwards on each side, but 

 I am not sure if this is natural. There are also traces of small dark lateral spots on 

 the dorsum of the abdomen in both forms. 



Macrosiphum hederae, sp. nov. (fig. 3). 



Alate viviparous female. — Antennae thin and much longer than the body, arising 

 from well-marked frontal lobes ; first segment much broader than and rather more than 

 twice as long as the second, the inner side somewhat serrated, with two small hairs 



Fig. 3. Macrosiphum hederae, sp. n., alate $; A, antenna; 



Qi, antennal hair; B, a, sub-anal plate ; B, h, anal plate; 



B, c, Cauda; C, cornicle. 



only ; second segment small and barrel-shaped, with the usual hairs, both dark ; third 

 segment very dark, except just at the base where it is paUid, long, with 12 sensoria 

 in a line on one side, not reaching to the apex ; fourth a httle shorter than the third 

 and longer than the fifth, imbricated ; sixth longer than the third, about as long as 

 four and five, basal area about one-third the length of the fourth, with one large and 

 several small sensoria in a group at its junction with the flageUum, imbricated ; fourth 

 and fifth paler than the third ; sixth shghtly darker than fourth and fifth ; hairs 

 short and blunt. Eyes large ; stemmata marked. Proboscis reaching to near the 

 base of the third pair of legs. Wings with normal venation ; veins yellowish brown. 

 Legs with dark coxae ; the greater part of the femora dark, except just at the base ; 



