( 55 ) 
fmooth in their Bark as the other parts of the Tree. If 
after the Harvefl and any time all the Winter over, you 
look upon theft Bearers through an ordinary Microfcope, 
you wiJl find the Cavities there full of Eggs of an ob- 
long Figure, and Citron Colour, efpeciaily in thofe 
Years and Trees wherein the Caterpillars have been nu- 
merous, out of thefe they are hatcht in the Spring. The 
Seafons which ufually deftroy them are, when there 
comes an early Heat, fuch as is fufEcient to hatch them 
before the coming forth of the Buds and BloiTcms, and 
when immediately there fucceeds a nipping frody Air, 
which foon kills them. The Difcovery of this Manner 
of their Propagation, feems to give Light to thefe Con- 
jedlurcs. i. That we ought not to conclude that any 
Infects are bred of Corruption^and not ex Ovoy becaufe 
we cannot difcern the particular manner of their Propa- 
gation,' for the Difcovery of this, you fee,isby Accident, 
and not difcernible by the naked Eye, z. That the 
Female Infers of all kinds of Flies and Butter-fJies do 
probably put their Spaun near thefe Places, where the 
Erucas which are hatcht of them are to have their Foodj. 
fo that they are to be ftarched for in fuch Places, by 
thofe who enquire into the Manner of their Propagation. 
3. They (eem to be fixed into the Cavities of the Bear- 
ers by a Gluten, fo as that Rains do not wafti them off 
4. Thegreateft Fro'fts, -it feems, do no hurt to the fmall 
Eggs of Infeds, for Ihavefeen the Caterpillars hatcb,af- 
ter moft Cold and Frofty Winters, of thofe Eggs which 
J have obftrved on the Bearers ail the Winter over. 
VL Oi- 
