46 
HOP. 
depositing lice in many places; we have likewise notes of their total 
absence on upwards of 1200 plants, of which the hills had been 
dressed with applications to prevent attack, and the confirmatory 
experiments where the plant was enclosed under muslin; of attack 
being set up where nothing preventive had been done to the ground 
round the stock before enclosure; and on the other hand the plant 
remaining perfectly clean where preventive applications had been 
applied. 
After being fairly set up as lice, the attack, as a matter of course, 
progressed to the full-grown stages ; and the following note by Miss 
Golding, from Piaxtol, Sevenoaks, is, in fact, a history of its regular 
method of increase. Writing on the 12th of May, Miss Golding men¬ 
tions that before the colder weather in April she noticed large green 
wingless Aphides, or a large one and smaller ones together, on Hop 
leaves, and at (the above mentioned) date of writing she found under 
the small red sheath at the base of the leaf-stalk numerous Aphides. 
These were yellowish for the most part; some Fly with green bodies, 
and also some with “fin-shaped markings on the sides,”—that is, 
with the embryo wings showing the stage just before the Fly gains 
its wings. 
I also found Fly appearing in a Hop-ground at Sharsted Court, 
near Sittingbourne, on the 23rd of May. 
On the 26th of May specimens of Fly were sent me by Mr. C. E. 
Edwards, of Marsh Court, Hereford, from bine in a ground about 
twelve miles distant from thence ; and on the 3rd of June he reported 
Fly as well as lice as being plentiful in another Hop-garden near 
Hereford. 
The above details give the history of the Hop Aphis, Aphis 
( Phorodon ) Huniuli , Schrank, distinct from any other, from its coming 
up from the hills to its early summer commencement of Fly-state. 
Now I will similarly trace the history of the Damson-Hop Aphis, the 
Aphis ( Phorodon ) Huniuli , var. Malaheb (Fonscolom.be), from its 
appearance at the same time as the Hop Aphis in spring to its change 
to the Fly stage at the end of May, and then point out the reasons ^or 
what appear to me to be such) for considering these Aphides to be 
very slight varieties of the same species. 
The first appearance of the Damson-Hop Aphis, i. e., Aphis 
Huniuli , var. Malaheb , on Damsons was a little before March 25th ; 
on that day Mr. E. Goodwin, of Canon Court, Wateringbury, Kent, 
wrote in continuation of previous observations (to Mr. C. Whitehead): 
—“ I am forwarding you some more of those Aphides. A number of 
young ones have appeared, which you will see swarming round the old 
ones on the Damson buds I have sent you. The old Aphides appear 
to be decreasing rapidly.” 
