127'

one horse. The horse, when accustomed t these attacks, seems scarcely aware of the injury it must sustain from its insiduous enemy; for, instead of placing her eggs promiscuously,

s an inaccurate observer might suppose, slay invariably places them on those parts which are most liable to be licked with the tongue. The eggs, after having remained on the hairs four or five days, the slightest application of warmth iuid moisture is sufficient to bring forth the imprisoned larva; therefore, on the touch of the horse's tongue, a small, active worm is instantaneously produced, and adhering to it,

s conveyed With 1   every part

?rtheinsde, and are often found in the in1es tines ; and are probably as injurious to the health of the horse, as worms are to the human constitution. They attain their full growth about the latter end of May, and are dropped from the horse from this time till the latter end of June: they then seek a retreat, in which they become chrysahids, and in about six weeks are transtbrmcd into flies.

The Sheep dad-fly is a terrible tormentor to that harmless race of quadrupeds, by insertlug her eggs in their nostrils, where they become grubs, and feed on the mucous matter they find there. The sheep dread their enemy,

become