Description of the Gooseberry Caterpillar, fc. 435 
same as the above, with the exception of the lower descending 
point and agate ; and corfsequently in his machine only one mo~ 
tion can be produced ; 3; whereas, by the second suspension, we 
exhibit at once the compound motion, and show the opposite ef- 
fects of the connecting wire proceeding from the opposite sides of 
the galvanic apparatus. It will, of course, be understood that 
the magnet is of such diameter as to admit a perfect freedoin of 
rotation about it. 
LXXXIX. Description of the Gooseberry Caterpillur; and 
practical Means for preventing its Ravages. 
r '¥ To the Editor. 
As the season has now arrived when that voracious little ani- 
mal, called the gooseberry caterpillar, commits such universal 
devastation in our gardens, I have taken the liberty to send you 
a particular description of the fly from whence it proceeds, to- 
gether with a remedy for preventing its ravages; and, if you 
think that so much said about so diminutive a creature is worthy 
of a place in your Magazine, it is at your service for publication. 
The caterpillar is too well known to need any description, but 
it does not seem that the fly from which the caterpillar proceeds 
is: I am sure that it is not; and that many people imagine that 
it comes from.a moth or butterfly, which I know it does not; 
and I am quite sure that the following account is correct. Nor 
has there been, that I have ever seen, any published account 
how its depredations may be prevented ;. and, from the obser- 
vations which will be presently made, if the suggested remedy 
should not prove effectual, it may open the subject to the minds 
of those who may discover something that will. 
In the first place, I will give the description from Sturt’s 
«* Natural History of Insects,”’ 2. b. 166: 
“93. Phalena wavaria, Gooseberry M.—Wings cinereous *; 
the upper ones with four abbreviated unequal black fascief. 
Inhabits Europe. B. The caterpillar feeds on the currant and 
gooseberry: it issomewhat hairy, green, and dotted with black ; 
having a yellow line along the back, and two on the sides. About 
the middie. of May it goes into the ground, to change into a 
naked brown-pointed pupa}. About the middle of June the 
moth appears, which is very common.” 
Now the above description is extremely imperfect, as well as 
* Cinereous—having the appearance of being covered with ashes. 
+ Fascia—a broad transverse line, 
I Pupathe aurelia......,. 
31.2 materially 
