16 PL Aga WCXIV. 
The Caterpillar of the Goat Moth feeds on the internal fubftance 
of willow trees ; it is faid to be alfo found in the body of the oak, but 
we have never difcovered any in fuch a fituation. The eggs are laid 
in the crevices of the trees; as foon as the Caterpillars are hatched, 
they begin to pierce into the folid wood. In moft parts of England 
they are called Auger Worms; the holes which they make in the 
timber appearing as if bored with that Inftrument. 
It lives in the Caterpillar ftate three years before it is transformed 
to a pupa; when iull fed it is four inches long, the body appears 
very flefhy, and without hairs ; the head is black, and armed with very 
fharp forceps; the cafe is compofed of bits of wood and faw-duft, 
which it unites with a ftrong web; the infide is lincd with a fine 
fmooth white filmy fubftance, like fattin ; it pafles to the pupa ftate in 
the cavity which it has perforated in che caterpillar ftate, within three 
or four inches of the opening: it remains only two months in that 
ftate before the Fly is produced. 
Is found in chryfalis in May ; in the fly ftate, the latter end of June, 
er in July. 
PLA Tye 
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