198 NATURAL HISTORY. 
It has two eyes, each of which confit of eight others. Linneus hag 
only four forts, the water Puceron, the fhow Puceron, the grove Pu- 
«eron, and the dung Puceron. 
The common Puceron, is of the fize of a Flea, and of a bright green, 
or blueifh green colour: the body is nearly oval, and is largeft and 
moft convex on the hinder part ; the breaft is very finial, and the head 
is blunt and green: the eyes may be feen very plainly, they being pro- 
minent on the fore part of the head, and of a fhining black colour; 
near to thefe, there is a black line on each fide, and the legs are very 
flender, and are all of the fame length, and of a whitith green, but 
the feelers are crooked. Some call it the green Flea of plants. It is 
frequently feen on the ftalks of orache. 
‘The toad-flool Puceron, is of the fize of a fmall grain of wheat, and 
it has a fhort roundith body, covered with a black glofly fkin, and the 
vent is remarkably protuberant: the head is fmall, as well as the eyes, 
but the feelers are as long as the body, and black, with white ends. 
The currant Puceroz, is fomewhat larger than a Flea, with a body 
of an oval fhape, and a {mall head, furnithed with little bright eyes: 
the legs are very flender, and the feelers long. Itis of a grey colour, 
variegated with black lines and fpots. 
The Puceron with white legs, has a roundith body, of a deep black 
colour, with a {mall head, and eyes that are fearce difcernible ; the 
legs are fhort, flender, and white, as well as the forked tail. It is 
common in woods, about old beech trees. 
The water Puceron, is of the fize of a {mall Flea, which it refembles 
in colour, being black and glofly, with a purplith tinge: the body is 
roundifh, and the head fmall, the eyes very little, and the feelers fhort; 
but the legs are longer than in moft of this kind. It is common in 
ponds, and other ftanding waters, and in calm days of the autumnal 
feafon, the furface is almoft covered over with them. 
Fryfch obferves, that the infe& which the French call Puceron, is by 
the Germans named Meeltan, which is as much as to fay Moth-dew; but 
he thinks they may be more properly called Blat Leuce, that is a leaf 
Loufe: they all bring forth their young alive, and the fetus, when it 
is ready to be brought forth, entirely fills the belly of the female, and 
its fore parts are excluded firft, then the hinder: the fetus does not 
begin to move till the horns or feelers appear out of the body of the 
old one; and by their motion it firft fhews figns of life, by moving 
them every way, and bending all the joints: then they begin to ftir 
their two fore feet, as being moft adtive, next to the horns; after this 
the middle feet, and thofe behind: the female lets the foetus ftick to her 
hanging in the air, till its {mall and foft members become harder; but 
as foon as fhe finds that it has {efficient ftrength, fhe moves from the 
place where fhe was fitting, and as it were forces the foetus to fland 
upon its legs, and then the leaves it, 
The weaker the leaves and buds of plants are, that is the lefs 
juice they contain, they are always more full of thefe kinds of Lice, 
infomuch that they are often quite covered with them. But they are 
not the caufes of the weaknefs of the plant, but the fign; though it 
fs true, that by picking and fucking it, they encreafe the difeafe, efpe- 
éially of that leaf or bud whereon they fit. 
As 
