Of Flies. 
si 
dirfiufed as at H. I K L is the needle’s point, upon which 
the animal was ftuck; and fig. 94, as before hinted, the 
fame animal when changed into a fly- 
Mr. Derham could never obferve any ether kind of fly 
hut the leffer phalenae 0 about four tenths of an inch 
long, to be bred in pears and apples; it is whitifh under¬ 
neath, greyiih brown above, fpotted about one third with 
waves of a gold colour, its head fmall, a tuft of whitifh 
hrown on its forehead, and antennse fmooth. The aurelia 
of this moth is fmall, and of a yellowifh brown- 
Of excrefbencies growing on willow-leaves, and 
a fmall fly bred thereon- 
r . . , ^ K 
M R- Leeuwenhoek frequently difcovered more than 
one fort of worm upon opening the knotty part 
of willow-leaves, and having put feveral of thefe knots,' 
whofe contained worms were not full grown, into a 
large glafs tube, that the worms might attain their full 
growth, could not find that any of them did fo ; ob- 
ferving at the fame time feveral of thefe knots to have 
none of the worms in them, but almofl: full of the ecre- 
ments of the worms which had been therein, and were 
diflodged, through a imall hole he could perceive in th% 
knots. 
Fig. 96. A B neprefents a willow- leaf, in which are 
feveral excrefcencies, feme of them with holes as F, 
others as C D E j G H fhews two of thefe knobs cut 
open, and the pofture of the worm therein, feveral worms 
lay dead in the knobs fuppofed to be killed by other lelTer 
worms, produced from, an egg depofited by another fly 
• Phy. Theo. p. 387; 
