( vi ) 
me by Dr. Geo. Fleming, C.B., LL.D., Veterinary Adviser ^ 
to the Army; Prof. John Penberthy, F.R.C.V.S., Professor 
of Pathology at the Royal Veterinary College, Camden Town, 
N.W.; and Mr. Hy. Thompson, M.R.C.V.S., Aspatria, Cum¬ 
berland. 
The illustrations are, I believe, acknowledged throughout, 
excepting those of development of the maggot of the Warble 
Fly from its early condition onwards, which are almost 
entirely from specimens prepared by myself. With regard to 
the contents of this little pamphlet generally, perhaps I ought 
specially to mention, for fear of misunderstanding, that I am 
quite aware that much of the information entered on has 
long been known to those who, from access to libraries or 
their scientific researches, have opportunity of supplying 
themselves with all the information that they need. 
But, still, the description of the injurious insects in 
intelligible wording , and their life-histories, are plainly (from 
the enquiries sent me) so far from available to many to 
whom they would be desirable for practical use, that I trust 
I shall not be considered as trespassing beyond my proper 
department in endeavouring to arrange this little book to be of 
some service on these points, and (so far as lies in my power) 
also as to the methods of prevention and remedy commonly 
requisite. 
ELEANOR A. ORMEROD, LL.D., F.E.S., &c. 
Torrington House, St. Albans: 
September, 1900. 
