xxxviii Mr. F. Walker's 



body : the legs are long and pale green ; the tarsi, and the tips of the thighs and of 

 the tibiae, are brown : the wings are colourless ; the squamulae are very pale green ; 

 the stigmata are very pale brown ; the veins are brown. 

 Found at the end of May. 



Aphis detracta. 



The winged viviparous female. — The body is black, small and shining : the anten- 

 nae are shorter than the body : the rostrum is dull green with a black tip : the abdomen 

 is dark green with a row of black spots on each side ; the disk is black, and sometimes 

 the spots are confluent and occupy the whole back : the tubes are black and as long 

 as one-eighth of the body : the legs are dull yellow ; the thighs excepting the base, 

 the tarsi and the tips of the tibiae are black : the wings are colourless and very much 

 longer than the body ; the squamulae are pale green or pale yellow ; the stigmata are 

 pale brown ; the veins are brown : the legs are sometimes quite black, with the excep- 

 tion of the fore thighs, which are dull pale yellow at the base. While a pupa it is 

 nearly elliptical, grass-green, and sometimes varied with red : 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 tarsi and the tips of the tibiae are 

 brown. 



Found in May. 



Aphis egeessa. 



The winged viviparous female. — The body is black and of moderate size : the bor- 

 ders and the under-side of the prothorax are reddish, as is also the abdomen, which 

 has a black disk and a row of black spots on each side : the antenuae are black and 

 much longer than the body : the rostrum is yellow with a black tip : the tubes are dull 

 yellow, slightly spindle-shaped, and nearly one-fourth of the length of the body : the 

 thighs are pale yellow, black from the middle to the tips ; the tibiae are dark yellow, 

 their tips and the tarsi are black : the wings are colourless ; the squamulae and the 

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



Found near Lancaster, in the middle of October. 



Aphides on the Apple (Pyrus malus). 

 Aphis devecta. 



The wingless viviparous female. — The body is dull green, short, very plump, co- 

 vered with a white bloom : the antennae are brown, dull green at the base, and shorter 

 than the body : the eyes are black : the mouth is dull green with a brown tip : the 

 nectaries are black and as long as one-tenth of the body : the legs are pale yellow and 

 rather long; the feet, and the tips of the shanks and of the four hinder thighs, are 

 black. 



First var. — The body is very dark^reen: the thighs are black, pale yellow at the 

 base. 



Found in the beginning of June. 



