234 



GARDEN FOES. 



Aphides, or Greenfly._Three species of Aphkles- 

 namely, Siphonopbora dirhoda, rosa?, and rosarum— infest 

 the shoots and leaves of the rose. They are all popu- 

 larly known as " Greenfly." There are winged and wing- 

 less females and similar males. The first brood of the 



[Photo: H. A. i-'mith. 

 GALLS ON A HOSE SHOOT. 



The galls ar* incss-like and rtnldieh in colour. Common on -wild 



year is produced in spring from eggs laid on the shoots 

 the previous autumn. From this brood are produced vivi- 

 parous femalets, which bring forth their young alive. Each 

 succeeding generation do the same until autumn, when 

 the last generation consists of oviparous females that lay 

 eggs. It appears that the presence of the male insect 

 ig not necessary until the last generation of the season. 



