OBSERVATIONS ON THE 
(ESTRIDJE, 
COMMONLY KNOWN AS “EOT FLIES.” 
The following Lecture on some of the points by which 
the family of Flies, popularly known as Bot Flies, may 
be distinguished from other insect-pests infesting cattle 
or horses, together with notes on the habits of the 
Common Horse Bot Fly and Ox Warble Fly, was de¬ 
livered by Miss E. A. Ormerod on June 20th to the 
Students of the Royal Agricultural College, Cirencester. 
In the observations which I have hitherto had the 
pleasure of offering to you, on our insect farm pests, I have 
only alluded to those which are injurious to field crops, 
or (speaking generally) to plant-life. But in the course; 
of the last few years, still more in the course of the last; 
few months, the amount of injury noticed as occurring 
to common farm stock from attacks of various common 
kinds of Flies or their maggots shows a need of so much 
more inquiry into both their history and also practicable 
means of prevention, that I venture to offer a few notes 
on a portion of the subject, hoping that by bringing it 
forward we may gain contributions of further informa¬ 
tion. 
