THE PEA APHIS WITH RELATIOX TO FORACJE CROPS. 
25 
Table \ M easurements of European specimens of Macrosiphiuii pid Kalt — Contd. 
WINGED VIVIPAROUS FEMALE. 
Anteimae. 
Length. 
Wings. 
Labeled— 
> 
1 
> 
VI. Filament. 

— c 
S bc 
a; 
M 00 
Cornicles. 

■S) 
a 
<u 
A 
% 
Macrosiphum pisi Kalt. 
On sweet peas 20-&-'12. 
England. F. V. Theo- 
bald 
Mm. 
0. 191 
■ .191 
Mm. 
0. 113 
.113 
Mm. 
1.069 
1.060 
Mm. 
0. 930 
. 913 
Mm. 
0.843 
.852 
Mm. 
0. 313 
.330 
Mm. 
1. 182 
1.182 
29 
25 
Mm. 
0. 748 
.765 
Mm. 
|o. 539 
Mm. 
4.41 
Mm. 
1.62 
Macrosiphum u 1 rn a r i 02 
(=pisiKalt). OnPisum 
ar\-ense. Sweden. A. 
Tullfiren 
.208 
. 208 
. 113 
. 113 
1.14s; 
.991 
.817 
.321 
21 
21 
.956 
.904 
1 . 60S 
Macrosiphum pisi Kalt. On 
risum sativum, 1/14 VIII 
'09. Gouvem, Pskow, 
Russia. A. Mordwilko. 
Rec'd from N. C'holod- 
.208 
.208 
.104 
.096 
1.061 
1.078 
.913 
.96o 
.817 
.817 
.313 
.330 
L304 
\. 278 
26 
1.008 
.991 
} .608 
4. 45 
1.55 
Macrosiphumpisi Kalt. On 
Lathyrus sp., Oct., 1903. 
Warschau, Russia. A. 
Mordwilko. Rec'd from 
N. Cholodkovskv 
.174 
.104 
1 1.061 
1.095 
.904 
.330 
2L061 
26 
.TS2 
I .556 
.800 
WINGLESS OVIPAROUS FEMALE. 
Macrosiphmn pisi Kalt. On 
Lathyrus sp., Oct., 1903. 
Warschau, Russia. A. 
Mordwilko. Rec'd from 
N. Cholodkovsky 
Do 
lo. 191 
0. 104 
0. 982 
0. 721 
0. 765 
0.295 
L043 
f .191 
.104 
.956 
.730 
.756 
.269 
L043 
/ .191 
.113 
1. 113 
.782 
.748 
.313 
L061 
\ .191 
.104 
L 130 
.765 
.748 
.295 
1.061 
0.713 I 
.soor 
1 1'ptumed, and measurements only approximate. 
In no case, in specimens included in this table, were sensoria present 
on antennal segments IV and V, excepting the usual distal one on V; 
the cornicles were imbricated throughout, there being no reticulation 
at the tips. The hind tibiae of the oviparous females bore numerous 
sensoria as is the case ^Y\ih. specimens occurring in America. Figure 
10, a-d were made from specimens collected by Dr. A. Mordwilko in 
Russia and sent us by Dr. N. Cholodkovsky. 
We have not had an opportunity to examine specimens of the 
wingless or winged males from Europe but our specimens of the 
wingless male agree in every particular with the description given 
by Mordw^ilko (10). 
980.34°— Bull. 276—15 4 
