liv. A Short Explanation 
FIG. XII. XI. XIV. XV. and XX. 
The tubercles or warts growing on Oak leaves: One 
of them opened: The kidneybean-like fubftance 
found in them: tubercle cut off from the 
leaf: A microfcopical view of the bean-like 
fubfiance. The manner in which the tubercle 
dries up or withers. : 
K.1 G. XT, 
a a ¥:xcrefcencies found on the fore end of the 
leaf, and likewife a little higher up, on the 
leaf’s nerve or main rib. 5 
& Two tubercles; one of them a double one, 
growing ftill a little higher up on the nerve 
or main rib; the other almoft on the edge 
of the leaf. 
¢c Some tubercles on the extremities of the 
leaf. 
FIG. XII. 
Containing five drawings. 
d The upper part of one of the tubercles cut 
OF 
e Three diftin& excrefcencies like kidney-beans, 
found in the hollow of the tubercle. 
J Three excrefcencies like beans, taken out of 
the hollow cell or cavity. 
FIG: ,pay. 
A tubercle or wart of the fame kind cut open, and 
exhibiting two kidney-like beans lying in it, in 
the fame manner that a preferved almond les 
within its candied covering, without any in- 
termediate vacancy. This is a microfcopical 
view, fhewing the objects a little larger than 
nature. 
F'T Gi Xv. 
g The bean-like fubftance, with an uneven 
furface. . 
/ That part of the bean, by which it princi- 
pally adhered to its tubercle, and received 
its nourifhment. 
BG a) exe, 
72 The manner. in which the tubercle begins 
“to leffen, and wither up by degrees, fo as to 
“become fit for the impreffion of the Fly’s 
teeth, and thereby afford it an opportunity 
of efcaping. 
Fil G; ><. 
bh A fmall round hole, gnawed by the Worm 
~~tn the withered part of the tubercle, and 
thro’ which it iffues into the open air. 
- 71 Places where the tubercles dry up, and 
which may be feen without cutting it. 
m The Worm cut out of its bean-like part, 
_ and reprefented of a fize bigger than nature, 
on an Oak leaf. 
of the TABLES.» 
FIG. XVI. 
The fame Worm fill more magnified, and of thé 
Jorm in which it appears, when about to enter 
the Nymph flate. 
Bol. Ga Xvi 
The fame Worm changed into a Nymph, and 
viewed with a greater magnifier in order to 
Jee its limbs more conveniently. 
aa Its eyes, refembling a net. 
66 The antenne lying between the legs and 
the wings. 
¢ The abdominal wings. 
Bae Go IRV 
The fame Nymph, changed to a Fly, of its nas 
tural fize. 
FIG. XIX. 
The fame magnified. 
aa The antenne placed before the eyes. 
66 The four wings. 
cc The leaft pair of its fix legs, every one of 
which is armed with two nails. 
d The tharp extremity of the abdomen, with 
which the Fly bores holes in the Oak leaf 
for the reception of its eggs. 
FIG. XXL. 
Reprefenting, in two drawings, the excrefcence 
growing on the leaves of the black Poplar, with 
the Worms and their food contained therein. 
@a@ A wrinkled excrefcence in the external coat 
of the leaf. 
& The principal rib of the leaf. 
c The internal fide of the leaf, where the wart 
or tubercle opens into a flit or opening. 
dd Windings of the principal nerve or rib, 
in the external coat of the leaf. 
FIG.” XXH, 
A microfcopical view of one of thefe very minute 
Worms, that is furnifhed with two horns, two 
eyes, and fix feet; and 1s moreover divided 
into head, thorax, and abdomen. 
e A woolly or downy fubftance, which thefe 
little infeéts very beautifully wear on the 
hinder part of their bodies. 
FIG. XXIII. 
f The infeéts glutinous food, contained within 
the woolly or downy fubftance, and _re- 
fembling a vefiel with a fpout ufed to feed 
infants. 
g The manner in which the downy fubftance — 
curls up, when its moifture is confumed, 
IG. 
N 
— Se ae ae eee ee ee 
en te ke ee et re 
