3-2. 



'ft 



thei 



eir 



fee- 



nK:r. 



r 



ones. 



irva or 

 )n the 



dthus 

 ' from 



which 

 ' they 



i^f U /^ 



fc AA \if ^ Al W 



5 



u'^H on 



" their 

 lole in* 



! 



3 





them, 





1 •/'a^ 



r 



* r 



3j 



0^* 



t py- 

 rrol' 



tt 



Uf 



Jt 



Mid- 



1,. that 



■ 



le 



un 



def 



.-.ntbc 



SECt. XIV. 3. 3 



OF PLANTS, 



S47 



nut-fhdl; which is the excrement of the curculio, which has eaten 



the fweet kernel. 



Secondly, having laft year written the above, 

 ther opportunity of attending to the aphis dunng 



■ 



I have had' ano- 



the fummer of 

 go'and (halUdd the further remarks, which T have been abl 

 n^ake on this moft curious and important animal, wh.cU may m pro- 

 cefs of time deftroy the vegetable world. , , . 



As the month of June was again in this fummer very <5ry, though 



ry warm 



the aphis was propagated in immenfe numbers 



crreat variety of trees, flirubs. and herbaceous pi 



The row of 



mentioned in No 



7 



f this Seaion was Infefted with 



th 



pi 



greater number of them th ^ r ^- ^ u a 



during the feafon about Midfummer there was fo little honey-d 



vet 



ht have efcaped obfervatlon, if it had not been 



yet what did appear was only on the upper 

 furfrcro^hofeT^^^^^ had other leaves impending over theni 



crowded with aphlfes ; whence I had no doubt, but that it was voided 



this year, th 

 particularly attended 



by the m 



f aphlfes 



hlch adhered on the under furf; 



of 



thofe fuperior leaves with their backs downwards 



O 



examining them with a 



ftrong magnifier I could freq 



perceive them infert their probofc 



k 



the veflels of 



inferior 



furface of the leaf; and particularly obferved, that 



w 



h 



they were not moving from place to place, that they generally flood 

 with their heads towards the foot-ftalk of the leaf of nut-trees, or to- 

 wards the bafe of the twigs of plum-trees, which circumftance I 



n^ewed to many of my friends. 



Both before and after the exiftence of the honey-dew a black ma- 



terial, 



hlch was 



fometimes moift 



d fometimes dry, appeared 



face of th 



the upper furfaces of thofe leaves only, which had other leavescrowd 

 ed with aphlfes over them, and even on the upper iui' 

 leaves of fome herbaceous plants, which grew under thefe 



Yy 2 



and 



