if 9^1 
defcend at pleafure : and to the piirpofe of rowing them- 
felves along the Air, 'tis obferveable, that they ever take 
their flight backvpardsy that is, their head looking a con- 
trary way, like a Sculler upon the Thames. It is fcarce 
credible to what height they will mount , which yet is pre- 
cifely true, and a thing ealily to be obferved by one that 
fliall fix his Eye iome time on any part of the Heavens, 
the white at a vaft diftance very diftindtly appear- 
ing from the Azure Sky ; but this is in Autumn only, and 
thatia very fa. rand calm weather, for in wind they de- 
light as little (if poffiblej for them to mount, as for the 
Indians in Phny to fight a battle with their Reed Arrows. 
Divers forts have divers ways and particularities in per- 
forming this i\xx^x'YLm^^h(jenomenon, I am not willing to 
hafleaaHiftory whichfurtherleifuremayimprove,yct part- 
ly to excite the cunous, and partly to fatisfie the promile I 
made in my former printed Letter ^ you may command 
from me^ when you pleafe, a fet of general Enquiries on 
this fubjed oi Spiders, moft of them already anfwered 
by me,^^^. founded upon new difcoveries. 
TheAccount given of the Bees breeding in Cafes made 
of Leaves, Phil Tranf, Numb. 6y, exad:ly agrees 
with what I have obferved. I add, that they are not ve- 
ry fcrupulous in the choice of thofe Leaves, but will make 
ufeeven of exocick Plants, fuch as the blen? Pipe or 
rtnge Tree, There is a very ftrange Oeconomy of nature 
yetunfolved: The f urthermoft S^?^?, faysA/r. Willughhy, 
makes her way out along the Channel through all the in- 
termediate Cartrages : and according as thefe Channels 
run upwards or downwards in the body of the Tree, the 
Maggot Bee at the far or upper end of td^oki Channel 
laid, and itPaould feem both and perfected firft, 
and muft either wait until the reft be fo too, or of necef- 
fity by working through their t'^y'^'j- deftroy them. If it 
be fo, it is very ftrange. But 1 take it otherwife, and 
perhaps it will be found by diligent obfervers hereafter, 
that 
