C sO 
Number. <e. 
5*. •j'jjg catterpillar of the $otB, tahk: I for (bffletime 
fed it with Elmi leaves^ when it creeps, it is twice as 
long, as when it refts. 
It changed the ^th. of and did continue in 
that condition untill the 24^^, of May^ the Year follow- 
ing, at which time came forth an odd fliaped Fly. 
This fly is a very fierce enemy to Spiders, and by a 
fingular antipathy perfiies and kills them 5 whereas other 
Flyes are taken in Spiders webs and eaten by them : I 
have experienced that thefe kind of Flyes, whilft Spiders 
are in the middle of their Nets, and there expeft the com- 
ing of Flyes, they feife upon the Spiders and wound them 
mortally j the Spider himfelfe thus wounded, caft him- 
felfe upon the Ground by a thred j this Fly follows, and 
breaks every leg of the Spider, one after the other, then 
he glories in a full Viftory, and often goes above the Spi- 
ders bodv as it were re)oycing , I have Obferved this 
thing thrice in doing, and then I faw the carry away 
the Spider on its Wing. 
Hhk By-birth is an Ichneumon •• That is,a Walp with a 
fender body : its kjHi^g the Spider is very remarkable^ 
and I have elfewhere (^in the PhilofophicallTranfadions) 
Regiftred an obfervation of thefi kjttde c/Walpes, laying 
their Eggs within the cakes of Spiders Eggs , and that 
when Hatched^ the Wafp- worms do feed upon the JubJiance 
of the Spiders Eggs, and do inproctjfe of time, in the fame 
Spiders webbs change into Aurelia’s, and are thence 
changed into Ichneumons of their own Species, 
whence we tear ne the confidence of thef kjud <^In(efts ; 
Which are fecure from Spiders , and therefore may well 
put 
