24 
For further information on the specific distinctions of 
the Flies, the peculiarities of habits, or anatomical 
structure of the Warble skin, I refer the reader to the 
works which I have mainly quoted from above, namely— 
‘Essay on the Bots of Horses and other Animals,’ by 
Bracy Clark, F.L.S. 
‘ Monographie der CEstriden,’ von Friedrich Brauer. 
‘ Praktische Insekten Kunde,’ von Dr. E. L. Taschen- 
berg. 
I have also to express my thanks for the assistance 
kindly given me by furnishing specimens, all which will 
be fully acknowledged in the report on this subject. 
E. A. 0. 
The figures of the Horse Bot Fly in its different stages (at pp. 9, 
10, and 11), and those of the Ox Warble Fly (at pp. 14, 17, and 20), * 
are copied from the illustrations given by Bracy Clark in his 
‘ Essay’ before quoted. * 
* 
WEST, NEWMAN AND CO., PRINTERS, HATTON GARDEN, LONDON, E.C. 
