104 
BRITISH APHIDES. 
Apterous viviparous female. 
Inches. 
Size of the body 0‘130x 0*045 
Length of antennse 0*120 
„ cornicles 0*050 
Millimetres. 
3-30X1-13. 
3*04. 
1*27. 
Long ovate. Shining green or ferruginous red. 
Antennse very long, and springing from large frontal 
tubercles. Abdomen broadest between the nectaries, 
usually smooth, but after giving birth to thirty or 
more young it becomes much puckered or corru- 
gated. Cornicles or nectaries very long, curved 
and black, dilated at their bases. Cauda large, ensi- 
form, and yellow. Eyes red. Legs long, yellowish - 
green, with black knees and tarsi. 
A red variety is very commonly met with in 
autumn. It differs much from the green, with which 
it often intermixes. 
The prevailing colour is ferruginous. The body is 
obscurely ringed with yellow at each junction of the 
segments. A minute dot marks the stomata and the 
dorsal pores. The penultimate ring also has a row of 
four dots, and there is a dark band above the tail. 
The figure in Plate II was taken in the open air 
whilst snow was on the ground on the 11th of 
January. 
At Haslemere^ the temperature fell to 12° Fahr. 
in the month of November, 1871, yet the viviparous 
female of this species withstood this cold, and I was 
unable to discover any viviparous female or egg until 
the January of the following year. This fact would 
seem to prove that cold alone does not cause the 
appearance of the oviparous form and the male insect. 
The Pupa. 
Head rather broad at the vertex. Green, ferru- 
ginous about the dorsum, with the four spots on each 
* The author’s residence, Wejcombe, near Haslemere, Surrey, is 
583 feet above sea-level. 
