( 2257 ) 
plant to feed. To give you a convincing inftance to the truth 
of this propofition,take this from my notes. 
May 22^ lobfervedontheback or underfide of the leaves 
of Atriplex olidayCcrtzin fmall milk-white oblong EggS5on fome 
leaves four^ on others fewer, or more- thefe Eggs were on 
fome plants yet unhatched, but on many of the fame plants I 
found the Egg- (hells or skins yet adhering to the leaves , and 
the httle maggots already entered (through I know not what 
iovifible holes) within the two membranes of the leaf,and feed- 
ing on the inward pulp or fubitance of the leaf : in other 
leaves of that planCj (he that lhall make the obfervation after 
me^will find plants enough of this fpecies leized on, to vary, as 
I did, the obfervation in one day, ) I found thofe maggots 
grown very great, and yet the two membranes^that is, the up* 
permoft and undermoil skin of the leaf, entire, but raifed and 
hollow like a blather. Note i. That thofe magots were of a 
Conick fhape. 2* That in July they fhrunk into fly Chryfalis's, 
and accordingly came to perfedlion, &c. To this unobvious 
way of feeding we think we may refer all worm-eaten fruits^ 
woods, &c. 
4. Worms feeding within fome of the parts of fome plants 
do caufe Excrefccncies* Thus the heads or feed-veffels of 
fapaver^ Spart, S/lv. Ger. Emac. &c. are disfigured for ha- 
ving worms in them, and grow thrice as big, as the not feafed 
6nes<; This is alfo plain in che Excrefe. of ffeudo tmcrium^ and 
BarbareayScc^ 
The fubftance of moft Vegetable Excrefcencies is not 
the food of the worms to be found in them/ The inftances 
given in confirmation of the laft propofition do alfo confirm 
this s neither is an OaJ^apple properly worm.-eatcn,or the shag» 
ged Galls, or Sponges of the Wild I{ofe^ or the Smooth ones on the 
leaves of the fame plant, or the Baggs upon the leaves of the 
yellow dwarf Willow or the ElmJUc^ 
This is the fumof what I have to fay at prefent concerning 
this fubjeft, being very unwilling to advance further^ than my 
own private obfervations will fuffer me. 
Ppp 2 
An Accompt 
