PLATE XV. 



Phylloxera georgiana Pergande, n. sp. 



Fig. 115. Mature galls; alcoholic— natural size. 



Fig. 116. Mature gall, vertical section— much enlarged. 



Fig. 117. Antenna of migratory female— magnified 250 diameters, 



Phylloxera subellipticum Shimer. 



Fig. 118. Immature gall— reduced Vi. 

 Fig. 119. Vertical section— reduced y>,. 



Phylloxera perniciosa Pergande, n. sp. 



Figv 120. Young galls on petiole, showing interior of gall — enlarged. 



Fig. 121. Young gall, vertical section — much enlarged. 



Fig. 122. Mature galls— reduced >$ . 



Fig. 123. Mature gall, vertical section — much enlarged. 



