t>4 Of Flies. 
mufket bullet, growing clofe to the ribs, under oaken 
leaves, their fkin fmooth with frequent rifings therein; 
inwardly they are very foft and fpongy ; and in the very 
center is a cafe with a white maggot therein, which be¬ 
comes an ichneumon fly f . This gall is remarkable for 
the fly lying therein all the winter in its infantile ffate, 
and comes not to its maturity till the following fpring* 
In autumn and winter thofe balls fall down with their 
leaves to the ground, in which the inclofed infedt is 
fenced againft the winter frofts, partly by other leaves 
falling pretty thick upon them, and efpecially by paren- 
chymous fpongy walls, afforded by the galls them- 
felves. 
From the large oak balls, called oak apples, which 
grow in the place of the buds, out of thefe galls come 
another fpecies of black flies. 
The gouty excrefcencies in the body, and branches of 
the black-berry bufh, produce a fmall firming black 
ichneumon fly, about a tenth of an inch long, with red 
jointed horns, four wings, red legs, and a fhcrt belly. 
They hop like fleas. 
All thefe infects afford an entertaining and agreeable 
variety when viewed through a microfcope. 
f Phy. Theo. p. 409. 
Of 
