Maggots where thty bad iubhittcl lonp enough to come 
to any pci t 6 ;on, the Bark was pierced quite through, 
by a hole jutt fhe bignefs of the Channel, and nothing 
lett reniaioing, but a fort of a whitifh pretty tough Skin, 
exaftly ihe colour and fize of the Maggot, at the mouth 
of the hole, and the reft of the forfaken Channel perfectly 
tilled widi what i formerly prefuna'd to call the Excrement 
of the Maggot. 
Then I ex^imined the Afh-wood, which had lain feme 
time in the Yard, and at firft fight, it being young, and 
its Bark pretty fmooth, I perceived it full of fmali holes y 
and on feparating it from the Tree, I found juft the fame 
fort of work as in the Elm, and by the fame fort of Fly, 
having found feveral of the Mother Flyes dead in their 
Channels, and the fame empty Skins at the extremities of 
the other Channels only with this difference, that where- 
as in the Elm all the Mother Channels were Perpendicu- 
lar, and the Maggot Channels Horizontal, here in the Afh 
it was juft contrary, all the Mother Channels were Hori- 
zontal,- and the Maggot Channels Perpendicular ^ this l ac 
firft thought might be accidental, and peculiar to that 
piece of Wood, but on examination of above icq pieces 
of Wood of different Trees, and felled at different times, 
I found it exactly to hold true in them all. 
I obferved feveral Oak and Maple Trees, which had 
been felled fome in Winter and fome in Summer, and the 
Bark remaining thereon, but could find no fuch thing, ia 
either of them. 
Explanation of the Figures in Tab. 2v 
Fig. I. /hews the Bark, of AJh, Fig. 2. The Bark of Elm. 
Fig. 'Ihe Worm as big as the Life lyitig on its Back- Fig. 4. 
The Mo i her Fly, with its Belly Hpivards^ as big as the Life, 
Fig. 5 % 6. l.he Wdrm and the flv with them. Backs upward. 
Fig. 7'. X Jhe Wof^ Mu^uijjd. Fig. 8. Mother 
FlfMagmffd. 
