Bui. 885, U. S. Dept. of Agriculture. 
Plate II. 
~ V 
; 
fr*-rtf8£ 
--ij 
1 
Fig. I.— Infested Lime Leaves, Showing Various Stages of Development 
of Infestation. 
These leaves were taken from trees shown in figure 2. 
<! 
Fig. 2.— Young Lime Trees Moderately Infested that were Kept Under 
Daily Observation for Over a Year. Photographed in October, 1918. 
THE BLACK FLY. 
