GOUT FLY 



133 



April 26, 1895. 



If I am not troublesome I should be very greatly obliged 

 if you would tell me anything as to the methods 

 commonly used for keeping off attacks of the Forest fly, 

 Hippobosca equina, which is such a special pest in the 

 New Forest to horses not used to it. I mean the thick made 

 fly of which I enclose a figure (18), natural size and magnified, 

 which deposits an egg-like puparium or chrysalis case in the 

 hair of the horses, from which case the fly presently comes 

 out. I believe you will know exactly the infestation I refer 



Nos. 1-6 and u and 12, Gout fly, grub, and pupa natural size and 

 magnified ; with infested stem ; 7, 8, 9 and 10, parasitic ichneumon 

 flies, natural size and magnified. 



FIG. 17. GOUT FLY, RIBBON-FOOTED CORN FLY, CHLOROPS TMNIOPUS, 



MEIGEN. 1 



to, and any information which you may be good enough to 

 give me, as to how to prevent it coming at horses and 

 settling on them, I know would be quite sound and reliable. 

 I am receiving so much application for information about 

 the habits, &c., &c., that I feel sure my best plan will be to 

 issue a leaflet as soon as possible with figure included at the 

 heading. I have, I think I may say, far more in the way of 



1 The attack is caused by the small black and yellow fly, figured above. 

 She lays an egg on the barley sheath ; the maggot from this attacks the 

 ear, then eats a channel down one side of the stem to the first knot, and 

 then turns to chrysalis state within the leaves. (E. A. O.) 



