*0§ THE ROSE AFHTS, 



rations are produced ; two in August, and the hit 

 about the middle of September. The two first re^ 

 semble the summer breeds, but the third differs very 

 greatly from all the rest. Though all the Aphides 

 which have hitherto appeared have been females, 

 in this tenth generation several male insects are found. 

 The females have at first the appearance of the sum- 

 mer insects ; but in a few days their colour changes 

 from green to yellow, and gradually, before their 

 full growth, to orange. These yellow females are 

 destitute of wings. The males, when they first ap- 

 pear, are of a reddish brown, but have afterwards, 

 when they begin to thicken about the breast, a dark 

 line along the middle of the back. They come to 

 their full growth in about three weeks, and then 

 casting their last skin appear in every part, except 

 the wings, of a bright yellow. They soon, however, 

 become dark brown. The wings become trans- 

 parent, and at length are in appearance not unlike 

 very fine black gauze. The females soon begin to 

 deposit their eggs, which, if possible, is always done 

 near the buds of the branches, that the future young 

 may be the more easily supplied with nourishment. 

 Some of them continue laying their eggs till the be- 

 ginning of November : these are oval, and when first 

 protruded are green, but they soon become perfectly 

 black. They adhere to the branches on which they 

 are deposited, by the viscous matter that at first 

 surrounds them. These eggs remain through the 

 winter till the ensuing spring before they are 

 hatched. 



If the Aphides had not many enemies, their in- 



