Mr. F. Walker's Descriptions of Aphides. 277 



black tips, and as long as the body : the mouth is white ; its tip 

 and the eyes are black : the nectaries are also black, and as long 

 as one-fifth of the body : the legs are white ; the feet and the tips 

 of the shanks are black. 



32th var. Dull green, plump, and nearly elliptic: the feelers 

 are white with brown tips, and longer than the body : the eyes 

 are black : the mouth is white with a brown tip : the nectaries 

 are black, and as long as one-fifth of the body : the legs are dull 

 white ; the knees and the tips of the shanks are black. 



13th var. Dull green, oval, mottled with red at the tip of the 

 abdomen : the feelers are pale brown, and nearly white towards 

 the base : the mouth is dull green with a brown tip j the nectaries 

 are brown, and as long as one-fifth of the body; the feet and the 

 tips of the thighs and of the shanks are also brown. 



14th var. Dull green, oval, more or less tinged with red, and 

 covered with a white powder, or mottled with red and green, or 

 all red, or varied with black ; there is a row of black spots on 

 each side of the body: the feelers are black, pale yellow towards 

 the base, and nearly as long as the body : the mouth is pale 

 yellow ; its tip and the eyes are black : the nectaries are pale 

 yellow with black tips, and nearly one-fourth of the length of 

 the body : the legs are yellow ; the feet, the knees, and the tips 

 of the shanks are black. On the mountain -ash. 



The viviparous winged female. While a pupa it resembles the 

 wingless female, but it is rather narrower, and its rudimentary 

 wings are whitish ; these organs are unfolded in May, and the 

 insect is then black and shining : the fore-chest is red, which 

 colour also prevails on the base and the underside of the abdo- 

 men : the feelers are shorter than the body : the mouth is pale 

 yellow with a black tip: the nectaries are as long as one- sixth 

 of the body : the legs are pale yellow ; the thighs except the base, 

 the feet and the tips of the shanks, are black : the wings are 

 colourless, and longer than the body; the wing-ribs are pale 

 yellow ; the veins and the wing-brands are dull yellow ; the 

 second fork is very long. 



1st var. The fore-border and the hind-border of the fore-chest 

 are green : the abdomen is dull yellowish green ; its disc is black, 

 and there is a row of black spots on each side : the wing- brands 

 and the veins are brown. On the mountain-ash. 



This species feeds on Crataegus oxyacantha, Pyrus malus, Sor- 

 bus aucupavia and S. domestica ; it appeared in thick clusters on 

 this last tree near London in the summer of 1847, and gave the 

 leaves autumnal red and yellow tints, and great numbers of 

 humble-bees (Bombi) came to feed on its honey. 



The oviparous wingless female. This appears at the end of Oc- 

 tober ; it is oval, yellow, and rather flat, and has a distinct rim 



