PLATE VI. 
A. — Acaudus lychnidis, cornicle of alate form. 
B. — Acaudus lychnidis, cauda of alate form. 
C. — Anuraphis amygdali, cornicle of alate form. 
D. — Anuraphis amygdali, cauda of alate form. 
E. — Anuraphis amygdali, head of alate form. 
F. — Anuraphis carotae, cornicle and cauda of alate form. 
G. — Aphis sambuci, head of alate form. 
H. — Aphis sambuci, cornicle of alate form. 
I. — Aphis sambuci, cauda of alate form. 
J. — Brevicoryne brassicae, cauda of alate form. 
K. — Brevicoryne brassicae, cornicle of alate form. 
L. — Aspidaphis polygonii, cornicle of alate form. 
M. — Aspidaphis polygonii, cornicle more enlarged. 
N. — Aspidaphis polygonii, cauda of apterous form. 
0. — Aspidaphis polygonii, head of apterous form. 
P. — Atarsos grindeliae, cornicle of alate form. 
Q. — Atarsos grindeliae, head of alate form. 
R. — Atarsos grindeliae, cauda of alate form. 
S. — Atarsos grindeliae, tibia of alate form. 
T. — Brachycolus stellariae, cornicle of alate form. 
U. — Brachycolus stellariae, cauda of alate form. 
V. — Carolinaia cyperi, cornicle of alate form. 
W. — Carolinaia cyperi, cauda of alate form. 
X. — Cavariella pastinacae, cornicle of alate form. 
Y. — Cavariella pastinacae, cauda of alate form. 
Z. — Cavariella pastinacae, tubercle of alate form. 
AA. — Hyadaphis xylostei, cauda of apterous form. 
BB. — Hyadaphis xylostei, cornicle of apterous form. 
CC. — Toxoptera aurantiae, head of alate form. 
DD. — Toxoptera aurantiae, cornicle of alate form. 
EE. — Toxoptera aurantiae, cauda of alate form. 
FF. — Rhopalosiphum rufomaculata, cornicle of alate form. 
GG. — Rhopalosiphum rufomaculata, head of alate form. 
HH. — Rhopalosiphum rufomaculata, cauda of alate form. 
II. — Rhopalosiphum nymphaeae, cornicle of alate form. 
JJ. — Rhopalosiphum nymphaeae, cauda of alate form. 
KK. — Pergandeidia ononidis, cauda and cornicle of alate form. 
LL. — Pergandeidia trirhodus, cauda of apterous form. 
MM. — Pergandeidia trirhodus, cornicle of apterous form. 
NN. — Liosomaphis berberidis, cornicle and cauda of apterous form. 
00. — Liosomaphis berberidis, cauda of alate form. 
PP. — Cryptosiphum artemesiae, cornicle of apterous form. 
QQ. — Cryptosiphum artemesiae, cauda of apterous form. 
RR. — Hyalopterus arundinis, cornicle of alate form. 
SS. — Hyalopterus arundinis, cauda of alate form. 
TT. — Hyalopterus deformans, cauda of apterous form. 
UU. — Hyalopterus deformans, cornicle of apterous form. 
VV. — Hyalopterus deformans, cauda of alate form. 
WW .—Hyalopterus deformans, cornicle of alate form. 
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