Payer E LOK NEX, 47 
‘old one he fhould have difcarded in the other, are equally and indif- 
criminately ufed in the feveral editions of both; we {till find it in the 
Aurelian, “Camberwell Beauty,” in\the other, “ Grand Surprife,” 
from which it might be readily inferred, that he meant two diftin& . 
Infects, were it not for the addition of the Linnzan name Pap. Antiopa. 
In the general defcription of this Infect in the Aurelian, Harris does 
not fay that it was fcarce at that time (1775), which he certainly 
would if it had been fo; but Berkenhout, in his outlines of Natural 
Hiftory, (1789) adds, after its fpecific character, that it is ‘¢ very rare 
« in this kingdom.” ‘To reconcile thofe accounts, we can only ob- 
ferve, that no Infect is more uncertain as to the time of its appear- 
ance; that though found in abundance in one feafon, it may not be 
feen in the next, or even for feveral fucceflive years ; it will then ap- 
pear in {mall or large quantities, for one, two, or more feafons, and 
again difappear for many years as before. 
The Englifh fpecimens differ from thofe of other countries in the | 
colour of the light exterior border of the wings; in the former, that 
part is of a very pale yeilow brown, inclining to a dirty white; in the 
latter, it is of a deep yellow, marked and {potted withbrown, fabri=< 
cius notices this difference, and fays they are varieties. 
The Caterpillars feed on the Willow, and are generally found on 
the higheft branches; they caft their fkin early in ‘uly, and pafs to 
the Chryfalis, as reprefented in the plate. "The underfide of the But- 
terfly is of a black brown, with irregular dark ftreaks; the yellowith 
pouier is vifible on that fide. 
PLATE 
