so 
ing a few seconds in the air, while the egg is preparing on the 
extended point of the abdomen. 
When several of these flies are confined in a close place, they 
have a particularly strong musty smell; and I have observed 
both sheep and horses, when teased by them, to look into the 
grass and smell to it very anxiously ; and if they by these means 
discover the Fly, they immediately turn aside and hasten to a dis- 
tant part of the field. 
I once saw in a meadow or field upon the cliffs at Margate, a 
Fly of this sort teasing a Horse that was confined to a small space 
by a spike stuck in the ground, to which a cord was tied. He 
could not get away from its attack, and became quite furious, for 
in kicking at the Fly with his fore-foot, which he did vehe¬ 
mently, he often struck the bone of the lower jaw, creating 
excessive pain ; for in that direction while grazing the Fly comes 
to the beard of the lower lip. 
The eggs of this species are difficult to be seen upon the 
Horse’s skin or beard, owing to the agitation of the beast, and 
from the colour of the egg being dark like that of the skin of the 
Horse. The animal has been generally too impatient, while un¬ 
dergoing this operation, for to let me examine them very well. 
1 ascertained, however, its form by pressing one of these eggs from 
the abdomen, which had somewhat the appearance and figure 
represented at 18, having a kind of petiolus or stalk to it, and its 
blunt extremity obliquely truncated and curved. 
The Larva or grub of this species inhabits the stomach as the 
former, generally adhering to the white lining, and is disposed 
promiscuously in dense clusters, after the same manner ; they may 
however be distinguished from them by being in general smaller, 
longer in proportion to their bulk, and rounder ; and I have 
thought of a duller red, or more inclining to white, than those 
of the Equi, for they differ in appearance in different subjects. 
