188 
BRITISH APHIDES. 
with, reddish, nor the eyes brown, I think it is certainly 
distinct. Whilst the great length of the antennge 
would remove my insect from the genus Rliopalo- 
siphum, the presence of a large tail would separate it 
from Drepanosiphum, 
Again, if it be an invariable fact that Drepano- 
siphum has no apterous viviparous form, the presence 
of forward embryo in my specimens will be a sufficient 
justification for separating them from that genus. 
These specimens were obligingly sent to me by Miss 
Henry from the conservatory of Blackdown House, 
near Lurgershall, Sussex. They were very numerous 
on the fronds of Gystopteris montana. 
I believe this is the first notice of Aphides taking 
nourishment from the Fern family. Unfortunately I 
could breed no v/inged forms. 
Genus VI.— MEGOTJRA,'^ BucUon, 
Head broad. Front fiat. Rostrum rather short. 
Antennae much longer than the body. Frontal tuber- 
cles large ; remote at their bases. Third joint the 
longest. Second joint twice the size of the first. 
Fourth joint longer than the fifth. Seventh joint 
setaceous. Abdomen globose, convex. Cornicles long, 
dilated in the middle, expanded at the ends or trumpet- 
mouthed. Cauda markedly long and thick. 
Wings and legs as in Siplionopliora, 
Megoura vioij], Buddon, Plate XXXVIII. 
Apterous viviparous female. 
Indies. Millimdres. 
Size of body 
0-110 X 0-070 
2-79x1-77. 
Length of antennae 
0-170 
4-31. 
,, cornicles 
0-025 
0-62. 
„ cauda 
0-030 
0-76. 
* Prom Miyag 
great, ovpci a tail. 
