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62 | PLATE xXcyV. 
The Caterpillar of the Ph. Neuftria are found in June, either on 
the white-thorn; black-thorn, or briar  fometimes on fruit trees: they 
pafs to the Chryfalis ftate in July, and the Moths appear in Auguft. 
The female depofits her eggs with fuch rarticular care and regu- 
larity, that a clufter of them forms one of the moft pleafing obje€ts for 
microfcopical inveftigation ; they are cruftaceous, of a light grey or 
bluifli colour, elegantly marked at the broadeft end; they are difpofed 
with the greateft fymmetry around the fmall branches of the thorn, and 
are fo cemented together that they cannot readily be feparated.— The 
appearance of a clutter is reprefented in our plate. 
“The eggs are laid in autumn, though they are not hatched till the 
enfuing fpring. ‘When the young Caterpillars burft forth, they form 
into focieties, fometimes of thirty or forty individuals, fometimes of a 
much greater number; they immediately commence the formation of 
a {pacious web, and if the weather be fine in two or three days, their 
work is completed ; as however they encreafe in bulk, it is neceflary 
to enlarge their dwelling, and this they manage either by adding new 
external coverings, or encreafing and extending the windings withine 
They feldom pafs to the Pupa form in thofe nefts, but feparate in fearch 
of a more convenient place for. that pai when they have attained 
their full fize. 
The Caterpillar, when preparing for its next ftate, weaves a ‘large 
filky cafe; within which it forms another fomewhat fmaller ; and thus 
enveloped by its double cone, it changes to the Pupa form, » The 
Pupa is black, and may be juft difcerned through the two cafes, as res 
prefented in our plate. 
The figure of the perfect Infect is copied from a female fpecimen 
the male is rather darker, and has the Antenne more feathered. 
PLATE 
