526 
MANUAL OF MODERN FARRIERY. 
eions, in proportion to the size of the grub. plate x. fie? d. 
It is not until the middle of May that these bumps can be 
seen full grown ; but, owing to particular circumstances, 
they do not attain an equal size. The largest of these are 
sixteen or seventeen lines in diameter by the base, and about 
one inch high, but they are scarcely perceptible before the 
beginning, or during the course of the winter. 
Young cattle are most commonly attacked by these in¬ 
sects, and the most healthy are fixed upon for the deposi¬ 
tion of their eggs; a wonderful proof of the instinct of 
these flies. Cattle-dealers and farmers have remarked this 
fact, and the latter always find the hides the best that these 
flies prefer. The number of bumps, or wurbles, which are 
found upon a beast, is equal to the number of eggs which 
have been deposited in its flesh; or, to speak more correctly, 
the number of eggs which have become matured under the 
skin, as those which have been fertile. Sometimes there 
will be found a single wurble on a cow, while in others up¬ 
wards of thirty have been counted. The ordinary size oi 
the full-grown grub is represented on plate x. fig. 16 ; and 
18 is a magnified figure. Fig. 13 is a greatly magnified 
view of the tail of the grub. 
Remedies. —As soon as it is detected that the skin of the 
cow is penetrated by this insect, the part may be squeezed 
between the two thumbs, and the grub will be forced through 
the aperture in the skin. If the person have not sufficient 
strength to dislodge it, this can be easily accomplished by 
the aid of a pair of shoemaker’s pincers. This may be 
done at any time while the grub remains. Any other 
mode of cure is of no avail. When the grub has been 
ejected, let a drop of turpentine be put into the cavity, and 
m a short time it will heal up. 
