SIPHONOPHOEA LUTE A. 
119 
to two mches below tbe surface^ but these con- 
tained only companies of three or four individuals of 
Amy da fuscicornis, which is entirely a root-feeding 
species. 
There would seem to be no connection whatever 
between these two species of Aphis, for the latter 
plentifully occurs throughout the spring on lettuce 
roots, and at a time when 8. granaria is feeding on the 
corn. 
Up to the present time no satisfactory answer has 
been given as to what becomes of the wheat aphis in 
the winter, neither do we know when the female 
deposits her eggs. 
Koch describes under Aphis avence^ Fab., an insect 
which differs from his S, cerealis chiefly in the shorter 
character of the antennse and nectaries. Probably it 
is a variety only of 8, granaria. 
Q . SiPHONOPHOEA LUTEA, BucUou, Plate VIII. 
Apterous viviparous female. 
Indies. 
Size of body 0*065 X 0035 
Length of antennm 0*060 
,, cornicles 0*020 
Millimetres. 
1*64x0*88. 
1*52. 
0*50. 
Shining bright yellow or greenish yellow, with a 
dark brown spot upon the dorsum. Antennae black, 
but the first and second joints pale reddish. Eyes 
bright red. Cornicles very stout and thickest at their 
bases. Cauda long and green. Femora green, with 
dark genua. Tibiae and tarsi brown. 
Pupa, 
Very like the larva, but has no dorsal spot. Wing- 
cases yellow. Legs rather pale. 
