New British Aphides. xxxvii 



Aphis transmutata. 



The winged viviparous female. — The body is black, and as large as that of the va- 

 riety of the preceding species : the antennae are black and longer than the body : the 

 rostrum is yellow with a black tip : the tubes are black and as long as one-sixth of 

 the body : the thighs at the base, and the tibiae excepting their tips, are yellow : the 

 wings are colourless and much longer than the body ; the squamulae and the costal 

 veins are pale yellow ; the stigmata are dull yellow ; the other veins are brown. 



Found with the preceding species, in the middle of September. 



Aphides on the Plum (Prunus domestica). 

 Aphis convecta. 



The wingless viviparous female. — The body is oval, slightly convex, grass-green : 

 the antennae are dull yellow and hardly more than half the length of the body : the 

 eyes are dark brown : the rostrum is dull yellow with a brown tip : the tubes are about 

 one-twelfth of the length of the body : the legs are pale yellow ; the feet and the tips 

 of the shanks are brown. 



Found in May. 



Aphis persorbens. 



The wingless viviparous female. — The body is oval, convex, shining, grass-green or 

 dull pale green, sometimes prettily mottled with red or with crimson, and like a ripe 

 plum in colour: the antennae are pale green, darker towards the tips, and less than 

 half the length of the body : the eyes are dark brown : the rostrum is pale green with 

 a brown tip : the tubes are not more than one-twentieth of the length of the body : 

 the legs are pale green ; the tarsi and the tips of the tibiae are brown : the limbs are 

 white for a while after the skin has been shed. 



Found before the middle of April. 



Aphis internata. 



The winged viviparous female. — While a pupa it is green : the limbs are paler : 

 the antennas are longer than the body ; the tips of the joints are brown : the tips of 

 the mouth and of the tubes are also brown, and the latter are one-fourth of the* length 

 of the body : the legs are long and slender ; the knees, the tarsi and the tips of the 

 tibiae are brown : the rudimentary wings are pale. 



Found at the end of April. 



Aphis transposita. 



The winged viviparous female. — The body is grass-green and rather small : the 

 disks of the head, of the chest and of the breast are brown : the abdomen has a row of 

 black spots on each side : the antennae and the eyes are black, and the former are 

 nearly as long as the body : the rostrum is pale green with a dark tip, and does not 

 reach the middle coxae : the tubes are green and nearly one-fifth of the length of the 



