Mr. F. Walker's Descriptions of Aphides. 25 



The ovipar'ous wingless female. Found with the preceding, which 

 it much resembles, but the hind-shanks are black, wide, and 

 slightly curved. The eggs are laid in the beginning of October, 

 and occur in abundance on the spikes of the furze. 



The winged male. While a pupa it resembles the wingless 

 Aphis : the feelers are rather more than half the length of the 

 body : the nectaries are as long as one-tenth of the body : the 

 legs are dull pale green ; the feet and the tips of the thighs and 

 of the shanks are black : the rudimentary wings are dull green. 

 When the wings are unfolded it is black, and very small : the 

 feelers are nearly as long as the body ; the fourth joint is very 

 nearly as long as the third j the fifth is as long as the fourth ; the 

 sixth is about half the length of the fifth ; the seventh is longer 

 than the fifth : the mouth is yellow with a black tip : the shanks 

 except their tips, and the four anterior thighs at the base are 

 yellow : the wing- ribs are yellow; the brands and the veins are 

 brown. 



74. Aphis Symphytij Schrank. 



Aphis Symphyti, Schrank, Faun. Boic. ii. 1. 107. 



The viviparous wingless female. In August 1847 I found this 

 species in great profusion under the leaves of the comfrey 

 {Symphytum officinhle) near Tottenham, but could see it nowhere 

 else, notwithstanding the common occurrence of the plant. The 

 grub of Agromyza ?, of an orange colour and above one line in 

 length, frequently devours it ; an Aphidius and an Allotria are 

 also among its enemies. It is a small species, oval, plump, 

 bright yellow, with dark green nectaries -, the head is often dark 

 green, and sometimes this colour extends partly or wholly over 

 the body, and is more or less mingled with yellow. It discolours 

 the leaves of the comfrey, which are nevertheless adorned by its 

 bright and many-coloured clusters. The forehead is convex in 

 the middle, and has a slight tubercle on each side at the base of 

 the feelers : the mouth reaches the middle hips : the feelers are 

 setaceous, and shorter than the body ; the fourth joint is shorter 

 than the third ; the fifth is a little shorter than the fourth ; the 

 sixth is a little more than half the length of the fifth ; the seventh 

 is more than twice the length of the sixth : the fore-chest has a 

 suture across the middle ; its sides are slightly convex : the nec- 

 taries vary in length from one-sixth to one-twelfth of the length 

 of the body, and in some cases where they are shortest, the legs 

 also are very short, and the feelers are much less than half the 

 length of the body : the fore -legs are but little shorter than the 

 hind-legs ; the shanks are straight. 



1st var. The body is dark green, with a white bloom, and 

 mottled with paler green : the feelers are yellow with brown tips. 



