Insects Injurious to the Apple. 



139 



do. Young blossom tufts are most attacked, and are seriously 

 damaged. 



The apterous vivip)arous female can at once be told from tlie green 

 pyriforni pomi by being more oval and having a darker green area 

 on the dorsum and the cornicles pale brown instead of black, and very 

 short, slightly swollen, and occasionally with a rusty basal spot. 



The winged viviparous female has the abdomen green, and shoi't, 

 light brown, swollen cornicles, and the wings difierent. 



FIG. Hi.— Aphis fitcldi ON APPLE SH' 



The oviparous female is green, with short swollen cornicles, which 

 are light brown, whilst a rusty red spot occurs at their base. 



The male is winged and so can be easily told from the male 

 2)omi, and from the winged male sorhi by the greener colour and 

 dusky transverse markings and shorter cornicles. 



This species in all its stages can at once be told from the Aphis 

 pomi by the shorter and thicker cornicles. 



The intermediate food plant has not been definitely traced in this 

 country. Suggestions have l^een made in America that they go to 

 grasses and wheat. Search in this country failed to reveal any on corn 



