Insects, etc., Injurious to the Damson. 253 



TABLE SHOWING LIFE-HISTORY OF HOP APHIS. 



A. DAMSON, ETC. 



Winter. Ova 



Spring. 



May 



and 

 June. 



1st Vivip. Wingless Females 



/ I \ 



3 generations of same 



Pupae 



Winged Vivip. Females 



Rest of Summery 



None present. 



Autumn. 



Winged Vivip. Females 



Illllll! Ml III III 



Ovigerons Females 



and Winged Males 



B. HOPS. 



Wingless Females (rare) Vivip. 



Wingless Females Vivip. 



I i 



Wingless Females Vivip. 

 I I 



Wingless Females Vivip. 



Wingless Females Vivip. 



I 



Winged Vivip. and Wingless Vivip. Females 



Wingless Vivip. Females (lice). 



Wingless Vivip. Females 



Pupae. 



i ! 'I 



Winged Vivip. Females 

 ! I I 



female migrants 



Winter. 



Ova. 



Few Wingless Females 



