21 $ 
Mr. marshall’s Account of 
was nearly {tripped ; and this year it has been fubjedted to a 
fimilar fate. Many thoufands of acres, upon which a fairer 
profpect for a crop of turnips has not been feen for many years, 
* 
have been plowed up ; -and as, from the feafon being now far 
lpent, little profit can be expected from a lecond lowing ; the 
loi3 to the farmers, individually, will be very confiderable, and 
to the county immenfe. 
It was obferved in the canker-year above mentioned, that,, 
prior to the appearance of the caterpillars, great numbers of 
yellow flies were feen bufy among the turnip plants ; and it 
was then fufpeeted, that the canker was the caterpillar Hate of 
the yellow fly ; and lince that time it has been remarked, that 
cankers have regularly followed the appearance of thefe flies. 
From their more frequently appearing on the fea-coalt, and 
from the vaft quantities which have, I believe, at different 
times, been obferved on the beach wafhed up by the tide, it 
has been a received opinion among the farmers, that they are 
not natives of this country, but come acrofs the ocean, and 
oblervations this year greatly corroborate the idea. Fifhermen 
upon the eaflern coaft declare, that they actually faw them 
arrive in cloud-like flights ; and from the teltimony of many, 
it feems to be an indifputable faff, that they firft made their 
appearance on the eaflern coaft ; and, moreover, that on their 
Arif being obferved, they lay upon and near the cliffs fo thick 
and fo languid, that they might have been colle£ted into heaps, 
lying, it is laid, in fome places two inches thick. From 
thence they proceeded into the country-, and even at the diftance 
of three or four miles from the coaft they were feen in multi- 
tudes refembling fwarms of bees. About ten days after the 
appearance of the flies, the young caterpillars were firft ob- 
ferved on the under fides of the leaves of the turnips, and in 
feven 
