368 



REPORT OF STATE BOARD OP HORTICULTURE. 



progeny of this individual had gone out over the tree, all were removed 



rt. 



^}S- 6— Adult female, before development of eggs ; a, ventral view, showing very long 

 ■ucking setse; 6, anal plate, showing characteristic ornamentation of edge— greatly 

 enlarged. (Original). 



again, except one of the oldest and fertilized females. This method was 



continued for each generation throughout the breeding season. Some 



interesting records, tabulated below, were thus obtained, which indicate the 



fecundity of the females as well as the number of generations: 



Number of tree. 



1_ 

 2. 

 8- 

 4- 

 5- 

 6_ 

 7- 



Males, 



Females. 



Total. 



l- 



•!_ 

 3_ 

 4- 



5- 

 6- 



Progeny of overwintered 

 females. 



106 



120 



19S 



40 



158 



58 



13 



Progeny of second gen- 

 eration. 



Numher of tree. 



1 



2 

 3 

 4 

 5 

 6 



1 

 2 

 3 

 4 

 5 

 6 



Males. 



Femalet. 



Total. 



Progeny of third gener- 

 ation. 



110 307 



122 464 



190 284 



187 400 



174 280 



107 274 



Progeny of fourth 

 ation 



417 

 .5.S(» 

 471 

 5S7 

 451 

 351 

 genrr- 



.■)<)l 

 312 

 2H2 



5js5 

 iiU 



