110 
BRITISH APHlDBS. 
Winged viviparous female. 
Indies. Millimdres. 
Expanse of wings 0*290 7*35. 
Length, of body 0*090x0*040 2*27x1*01. 
55 antennae 0*140 3*55. 
,, cornicles 0*035 0*88. 
Bright green. Prothorax or collar marked with a S 
dark olive band. Thoracic lobes also dark olive. :i 
Abdomen globose and bulky 5 with four large dark ji 
spots on each side. Cornicles dark and cylindrical 5 as 
in the larva. Cauda yellowish-green and recurved, jl 
Legs wholly green. Wings somewhat coarse 5 with i 
greenish-yellow post-costal nerves and olive veins. I 
Parasites. 
Although it is not in the scope of this Monograph ; 
to attempt anything like a complete list of the parasites 
which prey upon AphideSj the history of the family 
would be incomplete without some slight reference to 
them. Brief notices of the more remarkable insects 
which keep Aphides in check willg therefore, be made 
from time to time, and such figures will be added as it 
is hoped may facilitate their identification. 
The larvae of many predaceous Hymenoptera obtain 
their sole nourishment from the juices of living 
Aphides. Siphonopliora rosce is very liable to their 
attacks. These terrible foes go through their meta- 
morphoses within the bodies of both the apterous and 
the winged females of this species. 
These parasites principally belong to the numerous 
family of Chalcidiae, a group of the Ichneumonidae 
much studied by the late Mr. P. Walker. 
Amongst the genera infesting the rose Aphis may 
be mentioned Aphidius, Allotria, Asaphes, Coryna, 
Cyrtogaster, and Eucyrtus. 
Wherever the rose Aphis is to be found, small, 
isolated, brown, globular, and apparently lifeless, 
insects may be discovered upon the leaves. Some of 
