APPENDIX. 
OBSERVATIONS ON FIRST APPEARANCE, &c., 
OP HOP APHIS.* 
Hop Aphis. Aphis ( Phorodon ) Humuli. 
2 
1 and 2, Winged Female Aphis; 3 and 4, lame or lice; nat. size and mag. 
The following observations regarding Hop Aphis were sent to me 
during the past season in answer to my circular of March 8tli of the 
present year, requesting information from those conversant with the 
subject as to first appearance of Hop Fly or Louse. 
I much regret that they are so few in number compared to what 
could be wished for on such an important subject, that consequently 
the method of Hop Aphis attack, that is, the place from which—or the 
form in which—it comes, cannot yet be considered as proved ; but I 
submit the notes to the contributors who have kindly sent them in the 
hope that they will turn over the matter in their minds, and work the 
subject forward further in the coming season. 
As points connected with Hop-growing can only be judged of 
properly by those who have a practical knowledge of the subject, I 
give the notes, as nearly as possible, in the senders’ words, merely 
removing observations which did not especially bear on the subject in 
hand, and also dividing the information given under different heads. 
It will be seen, firstly, that with few exceptions the contributors 
agree in the point of the Hop Aphis being first observed as Fly ,—that 
is, in the winged form,—and also that it has been first observed by 
* This paper, in a separate form, was distributed earlier to contributors of the 
infoimation, and some others, for observation during the present winter.—E. A. 0. 
