128 
BBITtSH ABHiBEg. 
first joints of tlie antennse black. Vertex pointed and 
garnisked witb bristles. Eyes bright red. Antenna 
long, green, darker at the joints and the tips. Pro- 
thorax black, with bright green neck-ring. Thorax 
fine green, with black lobes and scntellum. Abdomen 
fine green, broad oval, pointed at the apex; medial 
line with a darker green streak and numerous black j 
transverse dots. Four larger dark green or black spots j: 
on the outer abdominal edge, and as many smaller ones : 
near the connexivum. Two semicircular marks near I 
the insertions of the nectaries. Nectaries straight ! 
and black. The whole abdomen and the tail studded | 
with tufts of fine hair. Legs long, with yellow femora 
and black knees. Tibiae green with black tarsi. Wings 
moderately long ; insertions yellowish green ; stigma 
greyish black ; cubitus and other veins dark green. 
This prettily marked Aphis is not uncommon at 
Haslemere from June to the end of September. The 
winged forms appear early in July, when they, together 
with the apterous females, crowd within the flower- 
heads of the common yarrow, Achillea millifolium. In 
September I found the apterous females alone in the 
flower-heads. On keeping these in confinement, young 
were produced, which soon changed their colour from 
green to red, and shortly afterwards developed wing- 
cases. They all then became pupao, not of the female 
but of the male Aphis. 
In this species therefore, at least, the males are born 
from the large apterous females. Naturalists have 
hitherto thought that the v/inged females alone pro- 
duced the males. 
The Pu]pce of the Males. 
These are of various colours, as yellow, brick-red, 
and fine brown ; they are plentifully dotted transversely 
with black; two large greenish spots appear behind 
the eyes ; the legs are reddish, but otherwise coloured 
much like the larvse. The interior of the bodies of 
