eee Pig Be PREV. 
London it has been fought with moft fuccefs in the Batterfea Fields, 
or on thofe banks which abound with aquatic plants, between Batterfea 
and Richmond; the marfhes in the vicinity of Deptford and Rother- 
hithe have been yet more productive ; we do not however underftand 
that any have been taken this feafon about the metropolis. 
The very fingular manner in which this Caterpillar conftructs its 
web, deferves particular notice: previous to its transformation from 
the Larva to the Aurelia, it quits the tender plants which afford nou- 
rifhment, and retires to thofe, better calculated for its protection, in 
its defencelefs ftate; its choice is generally the Scirpus Lacuttris 
(Bull Rufh), or the ftoutett plant that i is near, if its leaves are rufhy 
and ftrong. Its firft procefs is to make a deep incifion acrofs the leaf, 
which it effeats with little Jabour, as its mouth is well armed for the 
Ss purpofe; the upper part of the leaf being thus deprived of its fupport, 
inftantly becomes dependent ; the Caterpillar embraces the two fur- 
faces of the fractured leaf, and weaves its web between, The web is 
of an exquifite texture and whitenefs, and bears great refemblance to 
the webs of fome f{piders that frequent watery places, 
_ The Caterpillars are found in June and July, the Fly in Auguft, 
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