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



It feeds on Urtica dioica, U. urens, Geranium Robertiarmm, 

 Malva sylvestriSf M. moschata, and Chelidonium majtis. On the 

 nettle it is very abundant at intervals throughout the year, and 

 multiplies in the winter when the weather is mild. 



The viviparous wingless female. When very young it is almost 

 white or pale yellow with a buff tinge towards the head, and 

 having a large green spot at the base of each nectary : when 

 full-grown it is green, oval, convex, smooth, sometimes shining, 

 sometimes covered with white powder : the feelers are white, 

 and more or less longer than the body ; the tips of the joints and 

 the whole of the latter joints are brown : the mouth is pale green 

 with a brown tip, and reaches to the middle hips : the eyes are 

 bright red: the nectaries are pale green with black tips, and 

 from one-fourth to one-fifth of the length of the body : the legs 

 are long and pale green ; the thighs are paler than the shanks ; 

 the knees, the feet, and the tips of the shanks are brown. 



1st var. The body is white with green bands across the back : 

 the feelers are pale green ; the tips of the joints are pale brown : 

 the eyes are dull red : the mouth is pale yellow with a black tip : 

 the nectaries are white with brown tips : the legs are white ; the 

 knees, the feet, and the tips of the shanks are pale brown. 



2nd var. The body is pale green with three vivid green stripes 

 along the back : the feelers are pale yellow; the tips of the joints 

 are black : the eyes are brown : the legs are pale yellow ; the knees, 

 the feet, and the tips of the shanks are black. 



3rd var. The body is greenish yellow. 4th var. Green : the 

 head is nearly white. 5th var. Dark green. 6th var. Pale red. 

 7th var. Rose-colour. 8th var. Pink. 9th var. Dull dark red. 

 10th var. Gray. 11th var. Lilac. 12th var. Purple. 



The young ones in the body amount to twenty and upwards, 

 of various sizes. 



The front of the head is straight and bristly : the first joint of 

 the feelers is very slightly curved, the inner side being convex ; 

 it is longer and much narrower than the tubercle on which it is 

 seated ; the inner side of the tip of this tubercle forms nearly a 

 right angle ; the second is not half the length nor the breadth of 

 the first ; the third is much more slender than the second ; the 

 fourth is much shorter than the third ; the fifth is much shorter 

 than the fourth ; the sixth is less than one-third of the fifth ; the 

 seventh is longer than the third : the fore-legs are not much 

 shorter than the hind-legs, whose shanks are but very slightly 

 curved. 



The viviparous winged female. In this, as in the wingless female, 

 there are many varieties of colour, but the head and the chest 

 are usually pale red ; their discs, and sometimes the whole of the 

 former, are brown : the abdomen is green : the feelers are black ; 



