SIPHONOPHOEA OAENOSA. 
145 
Winged viviparous female. 
Inches. 
Millimetres. 
Expanse of wings 0*340 
8*63. 
Size of body 0*100x0*040 
Length of antenna 0*170 
• cornicles 0*040 
2*54x1*01 
4*31. 
1 * 01 . 
Large. The images on emerging from the pupse 
are first of a delicate grey. Afterwards they become 
green, warm reddish ginger brown, or flesh colour. 
All the forms are hoary. Ocelli very distinctly marked. 
A dark patch behind the head. The thoracic lobes 
are somewhat linear in form, and dark brown like the 
scutellum. Abdomen with a faint green dorsal stain 
and green patches at the bases of the nectaries. 
Wings hyaline with green insertions and brown cubitus 
and stigma. Other veins are coarse and black. Cauda 
pointed and green. 
The young are very delicate in tint, shading off 
from white to flesh-colour, to pink, and to yellow. 
They are often prettily spotted about the head with 
rose-colour. They run fast, and are much more active 
than the adult insects. 
This insect was found in thousands at Haslemere at 
the end of June on the stinging nettle, TJrtica urens. 
Individuals of the green Siphonophora urticce were 
very sparsely scattered through the swarms. In this 
variable family of Homoptera, a common food-plant 
may suggest the identity of those insects which swarm, 
together, and to a certain extent mix their companies 
upon it. Whilst caution, on the one hand, will prevent 
our unduly multiplying species, a true appreciation of 
structural differences and altered proportions will, on 
the other hand, save us from ignoring good species. 
Our conclusions must be based, however, on surer 
grounds than mere choice of food. 
We are not at present acquainted with the causes 
which operate in the remarkable changes of tints to be 
seen in some species of Aphides. 
10 
