AFRICAN APHIDIDAE. — PART IV. 67 



Rhopalosiphum carduellinum, Theobald (fig. 2). 



Bull. Ent. Res. vi, p. 112. figs. 9 and 10, (1915). 



Aj)terous viviparous female. 



Antennae about as long as the body, arising from prominent frontal tubercles ; 

 basal segment much larger than second ; third not quite as long as the sixth, with 

 17-20 small sensoria along one side ; fourth sUghtly longer than fifth, with 3-6 

 sensoria ; fifth with normal sub-apical sensorium ; sixth about as long as 4+5, its 

 basal area about one-fourth the length of the fifth ; the apices of segments 3-5 are 

 darkened and there is a dark area at junction of basal area and flagellum of sixth ; 

 all the segments are imbricated ; the sensoria on 3 are of varied size and shape ; 



Fig. 2. Bhopalosiphum eardueUinum, Theob., apterous female ; A, 

 head and antenna ; B, cauda and anal plate ; C, cornicles ; D, sensoria 



on 3rd antennal segment. 



those on 5 are more regular in outline. Proboscis reaching to just past the second 

 pair of legs ; two bands of a few hairs on penultimate segment ; two marked sub- 

 apical ones on the apical arising from clear circular areas. Legs with apices of femora 

 and tibiae darkened and dark tarsi, a few hairs on apex of femora and numerous 

 short ones on the tibiae. Cornicles about as long as the fourth antennal segment, 

 about twice as wide and somewhat swollen on the apical half ; apex wuth a few 

 striae, remainder faintly imbricated. Cauda pale, broader than cornicles, more 

 than half their length, with three long hairs on each side and a curved sub-apical 

 one ; reaching just beyond the apices of cornicles. Length, 1*8-2 mm. 



Food-plant. Thistles {Carduus sp.). 



Transvaal: Pretoria, 20.V.1914 (C. Fuller); Onderstejjoort, 28. vii. 1911 

 (G. B. Bedford). 



Type in the British Museum. 



The apterous female sent with the alatae of this insect appears to be a distinct 

 species. The sensoria in the two apterous females sent by Mr. Claude Fuller appear 

 so much more closely allied that I have little doubt that they are true carditellinum. 



Numbers of nymphae sent were mostly all of a uniform pale colour, evidently 

 yellow or green, but a few show the tips of the wing pads dusky. One of the sensoria 

 ■on the third antennal segment is markedly bean-shaped, and the varied size of the 

 others is somewhat characteristic. 



Phorodon violae, sp. no v. (fig. 3). 



Apterous viviparous female. 



Yellowish green to dull pale yellow. Antennae longer than body, of same colour 

 as body except extreme tip of fifth and whole of sixth segments, which are dark ; 



