120 



FRED. V. THEOBALD. 



Described from a number of alate and apterous females. No colour notes were 

 sent, but from spirit specimens it seems to be a dark-coloured species. It is much, 

 smaller and more fragile than the European ivy aphis {Aphis hederae, Kalt.) and it 

 does not colour alcohol deep reddish-brown as does that species. There were a 

 number of nymphae also, very dark, with dark wing-pads and the hind tibiae with 

 rather longer hairs than in the apterae or alatae. 



Aphis hederae has many sensoria on segment 3 of the antennae and some also on 

 4 and 5 ; the head is not flat and the cornicles are longer. So far as I have traced, 

 Aphis hederae, Kalt., may be the same as Aphis (Myzus) lychnidis, Kalt. At least 

 I find that one can transfer hederae in spring to the Red Campion and that winged 

 lychnidis will live on ivy. 



Aphis pseudocardui, sp. nov. (fig. 15). 



Apterous viviparous female. — Dark ; third segment of the antennae and most of 

 the tibiae pale. Head slightly curved in front ; eyes large. Antennae not quite 

 half the length of the body, the two basal segments black ; the basal one wider than 

 the second, but of the same length ; the third about as long as the sixth, pale, some- 

 times slightly dusky at the apex, with 1-3 marked circular sensoria ; the fourth and 



Fig. 15. Aphis pseudocarduiy sp. n., apterous $; A, antenna; 



O/, a,, variations of sensoria; B, a, cornicle; B, h, c, lateral papillae; 



B, d, Cauda ;. C, antenna of larva. 



fifth about equal, each about half the length of the third ; the fifth with a sub -apical 

 sensorium ; the sixth mth the basal area as long as or shghtly longer than the blunt 

 flagellum ; the last three segments dark ; all imbricated. Proboscis dusky at the apex, 

 acuminate, reaching nearly or quite to the second coxae. Legs moderately long and 

 thick ; the femora pale at the base ; the tibiae hairy, pale, except at the apex ; 

 tarsi and ungues dark. Cornicles black, short and thick, a httle more than haK the 

 length of the third antennal segment, expanding basally, imbricated. Cauda and 

 anal plate black ; the former triangular, the apex blunt and rounded, spinose, with 

 two pairs of lateral hairs and three at the apex bent at their tips ; anal plate very 

 spinose, with a few long hairs. Abdomen with two marked lateral papiUae between 

 the cornicles and cauda, one between the mid and hind legs, near to the latter, and 

 one on each side of the pronotum. Length, 1 '5-2 mm. 



Transvaal: Onderstepoort, 28.vii.14 [G. Bedford). 



Food-plant. Thistles (Carduus sp.). 



Described from several specimens sent in alcohol. It differs from Aphis cardui, 

 F., in the much shorter and thicker cornicles. The two lateral tubercles between the 



