PLATE XI. 
A. — -Mordwilkoja vagabunda, stem mother. 
B. — Mordwilkoja vagabunda, antenna of stem mother. 
C. — Mordwilkoja vagabunda, antenna of alate form. 
D. — -Mordwilkoja vagabunda, wings. 
E. — Mordwilkoja vagabunda, thorax of alate form. 
Y .—Mordwilkoja vagabunda, cauda of alate form. . 
G. — Mordwilkoja vagabunda, cornicle of alate form. 
H. — -Asiphum sp. stem mother. 
I. — Asiphum sp. antenna of stem mother. 
J. — Pachypappella vesicalis, wings. 
K. — Pachypappella vesicalis, cornicles and cauda of alate form. 
L. — Pachypappella vesicalis, antenna of alate form. 
M. — Pachypappella vesicalis, wax plate. 
N. — Pemphigus bursarius, antenna of stem mother. 
0. — Pemphigus bursarius, wings. 
P. — Pemphigus bursarius, antenna of alate form. 
Q. — Pemphigus bursarius, antenna of alate form. 
K. — Pemphigus bursarius, antenna of stem mother. 
S. — Pemphigus bursarius, wax plate. 
T. — Pemphigus bursarius, cornicle of alate form. 
U. — Pemphigus populicaulis, antenna of stem mother. 
V. — Gobaishia ulmifuscus, antenna of stem mother. 
W. — Phloeomyzus passerini, apterous form. 
X.— Phloeomyzus passerini, antenna of apterous form. 
Y. — Phloeomyzus passerini, wings. 
Z. — Phloeomyzus passerini, antenna of apterous form. 
AA. — Phloeomyzus passerini, antenna of alate form. 
BB. — Phloeomyzus passerini, wax plate. 
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