Photos by] 



(II'. IIVs/ ,111,/ A. S/,/.. F.L.S. 



Phylloxera ov nn-: Oak. 



In the upper circle is seen a winged male showing marked differences of form from the wingless female below. The wings are twice 

 the length of the body, the legs are long, and the antenn;r long and banded. The lower inset shows a wingless female on the under side 

 of the oak-leaf laying her eggs in concentric circles. Whiii then- is no longer room for_her body iu one cluster, she moves oft and 

 repeats the process near by. 



4.^0 



