lii Mr. F. Walker's 



Aphis Rumicis? var. 



The ivingless viviparous female. — The body is small, oval, and black : the borders 

 of the fore-chest are very dark green : the limbs are black : the antennae are much 

 shorter than the body : the tubes are as long as one-eighth of the body : the legs are 

 moderately long ; the tibiae are pale yellow, with black tips. 



The winged viviparous female. — In colour it resembles the wingless Aphis, but the 

 tibiae are quite black : the wings are colourless, and much longer than the body ; the 

 squamulae are yellow ; the stigmata and the veins are brown. 



Aphis pr^eterita. 



The wingless viviparous female. — The body is small, oval, convex, light green : 

 the antennae are pale yellow, with brown tips, and as long as one half of the body: 

 the eyes are dark brown : the rostrum is pale green, with a brown tip : the tubes are 

 pale green, with brown tips, and as long as one-eighth of the body : the legs are dull 

 green and moderately long ; the tarsi and the tips of the tibiae are brown. 



The winged viviparous female. — While a pupa it resembles the wingless form in 

 colour : the legs are dull yellow ; the tarsi are brown : the rudimentary wings are 

 pale green. The winged insect is black, broad and stout : the borders of the protho- 

 rax are green : the abdomen is dark green : the antennae are black and shorter than 

 the body : the mouth is green, with a black tip : the tubes are black : the legs are 

 black ; the fore thighs are yellow at the base : the wings are colourless and much 

 longer than the body : the squamulae are pale yellow ; the stigmata are pale brown ; 

 the veins are brown. 



In the beginning of June. 



Aphis pollinosa. 



The wingless viviparous female. — The body is rather small, oval, plump, deep 

 velvet-like green, powdered with white : the limbs are white : the antennae have 

 black tips and are shorter than the body ; the tip of the rostrum and the eyes are 

 black: the tubes are nearly one-sixth of the length of the body : the legs are dull 

 white and moderately long ; the tarsi are black. 



Var. 1. The knees and the tips of the shanks are black. 



Var. 2. The body is mottled with pale green. 



Var. 3. The body is pale green. 



Var. 4. The legs are pale yellow ; the tarsi and the tips of the tibiae are brown. 



The winged viviparous female. — While a pupa it resembles the wingless Aphis in 

 colour, but is narrower, more flat, and less velvet-like : the rudimentary wings are 

 white or black. The winged insect is deep black : the abdomen is greenish black : 

 the eyes and the antennae are black, and the latter are much shorter 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 legs are black : the tibiae and the fore thighs are yellow ; their tips 

 are black : the wings are slightly tinged with gray and are much longer than the 

 body; the squanmlou are dull white ; the stigmata and the veins arc dark brown. 



