PLATE 81 
Pemphigus populi-transversus: 
A. —Young fundatrix, first instar. X40. 
B. a. b, c.—Beginning of galls on cottonwood leaves. 
C. —Adult fundatrix with cottony secretion removed. X13. 
D. —Winged sexupara from roots of Brussels sprouts. X16. 
E. —Wingless virgogene from roots of Brussels sprouts. X13. 
F. —Male. X40. 
G. —Oviparous female. X40. 
H. —Antenna of fundatrix. X120. 
I. —Antenna of wingless viviparous female from Brussels sprouts. X120 
J. —Antenna of winged fundatrigenia from gall. X120. 
K. —Antenna of winged sexupara from Brussels sprouts. X120. 
Brawn by Miss Miriam A. Palmer. 
(594) 
