124 



FRED. V. THEOBALD. 



pale ; fifth pale, except at the region of the sensorium and tip ; sixth dark, especially 

 on the apical half of the basal area and tip of the flagellum ; third segment longer 

 than the fourth and nearly as long as the sixth ; fourth a little longer than the fiith ; 

 fifth with the sensorium at some little distance from the apex ; sixth with the basal 

 area about one-third the length of the flagellum. Proboscis dark at the apex, reaching 

 just past the second pair of legs. Pronotum with a lateral tubercle on each side. 

 A prominent tubercle on each side of the abdomen just before the hind legs and another 

 between the cornicles and cauda ; a few moderately long hairs. Cornicles black, 

 imbricated, shghtly expanding basally, about as long as the third antennal segment. 

 Cauda black, similar to that of the alate female. Legs rather short and thick ; femora 

 and tibiae with long pale hairs and two on the tarsi, which are imbricated. 

 Lengthy 2-2-5 mm. 



British East Africa : Nairobi (T. J. Anderson). 



Food-plants. Compositae (species unknown). 



Described from 2 alate and several apterous $ $ preserved in spirit. A somewhat 

 obscure species resembhng Aphis rumicis, but distinguished by the different antennal 

 structure in the alate female and by the more striate ornamentation of the cornicles. 

 For comparison with Aphis leguminosae, sp. nov., see the preceding species. 



Aphis (?) cynarae, sp. nov. (fig. 18). 



Alate viviparous female. — Head black ; prothorax pale ; thoracic lobes black ; 

 abdomen pale, with a large dark median area and dark lateral spots ; cornicles short, 

 brown ; cauda pale brown. Antennae shorter than the body, pale brown ; legs 



D 





Tig. 18. A'phis cynarae, sp. n. ; 

 A, antenna of apterous $ ; B, end of abdomen ; (6) pore and 

 hair on abdomen ; 0, proboscis. D, antenna of alate ? ; 

 E, hind femur ; F, cornicle ; G, cauda. 



pale, dark on apical half of the femora and the tip of the tibiae and the tarsi. Wings 

 normal, with pale brown veins and stigma. Basal segment of the antennae a little 

 wider but no longer than the second ; the third the longest, with 35 to 50 sensoria 

 scattered over its whole surface ; the fourth half as long as the third, with 14-18 



