134 



Insect Pests. 



The mature viviparous females into which the lice turn, have 

 pale yellowish-green abdomen with darker green lines and sides, 



FIG. 103. APl'l.K APHIDES. 



1. Aphis fltchii. '2. A. xorbi. 3. A. pout i. All oviparous females. 

 (Partly after Sanderson.) 



cornicles long and dark, sometimes a faint yellow spot at the base 

 of each cornicle and an indistinct band connecting them. 



These lice and apterous viviparous females curl up the leaves, 

 and feed not only upon them, but also upon the young and tender 

 shoots. The majority are found, not only covered with a grey meal, 

 but also with numerous oil globules interspersed between them. 



In July and August, many of the lice turn to pupa?. The pupre 

 are greenish-yellow, some having darker 

 green stripes, and the wing buds and the 

 cornicles yellow with dark apices, and, 

 like the apterous females and lice, are 

 covered with a mealy powder. 



From these pupre winged viviparous 

 females appear in July and August. A 

 i'ew may be seen some years in June. 



The winged female has a deep greenish- 

 brown head, the thorax brownish-black, pro- 

 thorax paler ; the abdomen deep green with 

 three black spots on each side. The antenna? 

 yellowish-brown with dusky joints, and 

 dark cornicles. The legs pale green with 

 dusky tarsi, and tips of tibitB and knees. 

 These winged females are viviparous, and fly or are carried by 

 the wind from tree to tree and orchard to orchard. These set up 



IF. E. 



FIG. 107. Aphis xorbi. OVIPAROUS 

 FEMALE. YOUNG STAGE. 



