HOP APHIS. 
67 
be impressed, that those caterpillars will live in their cases through 
the winter, and change to chrysalids and Sawfiies in the spring, and, 
as surely as they are left under or by the bushes, the bushes will be 
infested again, it would be a great advance to getting rid of this loss 
which (in the complete face of knowledge of it being curable) is 
allowed yearly. 
An observation was given me by a grower on a large scale, of these 
caterpillars having been seen in great numbers crossing a road which 
separated one ground from another. In cases of this sort, whether 
of Gooseberry caterpillar or other insects, which sometimes come on 
to the attack, plainly and visibly in large numbers crossing a definite 
space, the German plan of digging a ditch across their way might be 
made to answer as a method of prevention that would pay well. 
If the ditch be filled with water to about half a foot below the 
ground level, and a boy set to see the creatures do not get out on the 
side they meant to travel to, this would do well; otherwise, shovelling 
on hot lime or gas lime, if at hand,—or if no other way occurred, 
setting a couple of boys to trample along the bottom of the ditch and 
destroy all that fell in,—would quite check the advance of the 
body. —Ed. 
hops. 
Hop Aphis. Aphis humuli, Schrank.; Phorodun humuli , Schrank. 
1 & 2 , Winged female Aphis ; 3 & 4, larvae or lice, nat. size and mag. 
The attack of Aphis blight on the Hops during the past season 
has been the worst known for many years. 
Mr. R. Cooke, writing from Detling, near Maidstone, mentions 
that the appearance of the blight was first talked about on the 16th 
of May, or a few days before, the attack beginning on the low river 
ground, from which it spread in all directions. On the 7th of June, 
