Mr. F. Walker^s Descriptions of Aphides. 45 



what shorter than the body : the mouth is dull green at the base : 

 the nectaries are as long as one-fifth of the body : the legs are of 

 moderate length : the fore-thighs are dull green at the base. 

 When very young it is linear, and dark green. 



The viviparous winged female. In colour it resembles the 

 winged Aphis : the wings are slightly tinged with gray, and are 

 longer than the body ; the wing-ribs are dull yellow ; the brands 

 and the veins are black. 



91. Aphis Helichrysi, Kaltenbach. 



Aphis Helichrysi, Kalt. Mon. Pflan. i. 102. 77. 



A. Balsamita, Mull. Zool. Dan. Prodr. 109. 1263. 



This little Aphis feeds on Helichrysum chrysanthum, Balsamita 

 suaveolens, Anthemis tinctoria, A. Matricaria, Achillaa Ptarmica, 

 A. Millefolium, Senecio vulgaris, Myosotis. 



The vivipa?-ous wingless female. The body is oval : the front is 

 somewhat convex and slightly serrated : there are no tubercles at 

 the base of the feelers, which are setaceous, and rather less than 

 half the length of the body ; the fourth joint is much shorter than 

 the third, but more than half its length ; the fifth is a little shorter 

 than the fourth, and the sixth has the same proportion to the 

 fifth ; the seventh is fully as long as the third, and much more 

 slender than the other joints : the nectaries are about one-fifteenth 

 of the length of the body : the legs are rather short, pale green. 

 The young ones in its body amount to twelve and upwards. 



The viviparous winged female. While a pupa it is nearly ellip- 

 tical, slightly convex, grass-green, rather smaller than A. Dianthi : 

 the feelers are pale green with brown tips, and hardly half the 

 length of the body : the eyes are dark brown : the mouth is pale 

 green with a brown tip : the nectaries are dark green, not more 

 than one-twelfth of the length of the body : the legs are dull 

 green, rather short ; the feet are brown. 



When the wings are unfolded the body is green : the head and 

 the disc of the chest are dark : the feelers are black excepting the 

 base, and more than half the length of the body : the legs are 

 yellow ; the feet, and the tips of the thighs and of the shanks are 

 dark green : the wings are colourless, and much longer than the 

 body ; the bend of the rib-vein between the angle where it sends 

 forth the fourth vein and its tip is shorter than in A. Tanacetina, 

 and the fourth vein is more curved ; the third vein is forked a little 

 after one-third and again a little after two-thirds of its length ; 

 the second vein is very nearly parallel to the lower part of the 

 third vein ; the first vein is nearer at its source to the second than 

 the second is to the third, but it diverges more at the tip. In 

 the wings of Aphides the third vein has in its upper division a 



