C i^6i ) 
great Channel, ( and, it may be, regularly placed at their 
ducdiftances, in the fides thereof) and after being hatch- 
ed, made thofe fmall Channels themfelves, fince thofe 
finall Channels are no way capable of receiving the Old 
Fly, and that the Maggot is always found at the farther 
end of the little Channel, and the reft of the little Chan- 
nel is perfedly filled with very fmall Particles, which, 
when dry, became fine Duft 5 and I conceive to be either 
the Excrements of the Worm, or parts oi the Bark 
ground fmall by the Teeth of the VVorm, to make its 
way forwards, and rejefted as not proper Aliment , or 
both. 
About the middle of O&oher I found thofe little whfte 
Maggots, and confequently their Channels, which they 
exaftly filled, were grown much b/gger, and had made 
their progrefs from the place where they were firft h.^ich- 
ed, which was clofe to, or upon the very Wood of the 
^ Tree, almoft to the very outfide of the Bark of the Elm, 
which is ufually pretty thick ^ and in every one of thofe 
Perpendicular Channels before mentioned, I found the 
Mother Fly lying dead, for the moft part towards the en- 
trance of the faid Channel. 
Thefe Obfervations put me upon viewing the Wood, 
which lay in my Yard for Timber or Fewel, and in 
all the Elm which was felled laft Spring, I found the 
Bark thereof as much pierced ^ the fatne Mother Channel, 
which for diftindion fake, 1 beg leave fthll, tho improperly, 
to call Perpendicular (for thefe Trees lay on the Gromid) 
and the fame little (now as improperly called Horizontal) 
Channel proceeding from the Mother Channels, fdll rof 
Maggots, v/hich Maggots had alfo made iheie^ wa-y^almoft 
to the outfide of the Bark. L:^ '.i -- ^ 
Obferving fome Elm, which had Iain mi5€h- longepii-ia 
the Yard, and taking off the Bark, 1 found the fame 4:racks 
both of Mother Fly and Maggots 5 and thgt.at the extre- 
n^i|ies of almoft aUl^be|tiorizopt;^l^Clm^^ ma4e by the 
