Aphides. 



183 



legs with black feet. At the end of the season wingless egg- 

 laying- females are evolved which lay long large eggs, and 

 fasten them to the stems and twigs of the currant bushes. 

 In the figure of this aphis, which is green in colour, it will 

 be seen that the wingless viviparous female, or adult 

 wingless female (2), has large cauda projecting beyond the 

 cornicles. 



Currant Aphis [Rhopalosiphuvi ribis). 



I. Winged viviparous female. 2. Wingless viviparous female. 

 Both much magnified. 



The Myziis cerasi is another aphis infesting currant bushes 

 as well as cherry trees. The figure below shows that there 

 are important difi'erences between this and Rhopalosiphum 

 rihis. The wingless female is much broader and has a some • 

 what squat form, being dark in colour with yellow legs, and 

 the Avinged female's body is also much broader with different 

 venation of the wings. 



This insect does not make galls upon the leaves, but the 

 swarms of larvae congregate under the leaves and suck out 

 their juices. They also emit quantities of the curious 

 secretion known as honey dew, which falls upon the leaves 

 below them, also upon the bunches of fruit, covering them 



