44 
HUP. 
from wingless females {depositing living young), which come up from the 
HojJ-hills. 
2nd. Tliat the great attack, which usually occurs in the form of 
“Fly” about the end of May, comes on the icing from Damson and 
Sloe, as well as from Hop, and that, the Hop Aphis and the Damson-Hop 
Aphis are very slight varieties of one species, and so similar in liahits 
as regards injury to Hop that for all practical purposes they may he con¬ 
sidered one A 
Further, it has been shown by the result of various experiments on 
the Hop-ground at Stoke Edith Park, Hereford (allowed us by the 
kind courtesy of the Lady Emily Foley) that the use of various appli¬ 
cations round the hills in the late autumn, or about the beginning of 
April in spring, completely prevented attack to the bines of those hills 
until the summer attack came on the wing. 
Amongst these applications paraffin was especially noticeable, as 
the plants treated with it were reported throughout as thriving up to 
the point of bearing well; and the serviceableness of mineral oil, both 
as a preventive and remedy, has been confirmed by the reports of 
experiments, regarding the use of petroleum and kerosine in dilute 
state, published by direction of the Department of Agriculture of the 
United States of America, and of which I give notes under the head 
of “ Kerosine Emulsion.” 
The following are details of the main points of the information 
contributed or acquired from various sources regarding Hop Aphis 
and its prevention during the past season. 
With regard to first appearance of Aphides on the Hop, Mr. C. 
Whitehead, waiting from Barming, near Maidstone, on the 29th of 
March, mentioned“ I have found the enclosed Hop-shoot, with the 
larvae in situ, in my Hop-ground this morning. There was a wingless 
female, which had evidently deposited viviparously the larvae enclosed.” 
Regarding the state of shoot at the time Mr. Whitehead wrote as 
follows :—“ There is in most places no shoot visible, as most grounds 
are dressed, that is, all old shoots and early shoots cut off. I dress 
late, and so I have plenty of shoots which will be cut off soon, and 
upon these I found the lice I sent to you. 
“ I went out in the afternoon, and found lice upon many hills, to the 
great amazement of the men. They say they never saw such a thing 
so early. 
“ Where there were small lice, in most cases a wingless viviparous 
large active female was not far off. 
“ I found them chiefly in a part sheltered from cold winds, and 
* By Hop and Damson-Hop Aphis I mean the Aphis ( Phorodon ) Humuli, 
Schrank, and the Aphis (Phorodon ) Humuli, var. Malaheb, Fousc.; but in no case 
the Aphis Pruni, B6aum., or any other kind. 
