CH.AV- II. 



HORSE DOTS. 



'579 



The two wings are moderately large, closed together when at rest, 

 hyaline, sometimes opaque white : with a transverse brown or grey 

 band and two spots, or a slight marking at the tip. The legs are long 



Fig. 147. Horse Bot Fly (Horse Bee), Gastrophilus equi, Fab. 



1. Horse Bot Fly, male. 2. Curved extremity of abdomen of female. 3. Maggot 

 4. Mouth hooks. 5. Spiracles at extremity of tail of maggot, all magnified, after Brauer. 



in proportion, smooth, and mostly yellowish brown. The fly is known 

 by the various names of the Great Spotted " Horse Bot Fly ; " the 

 "Horse Bee;" and also, from one of the places it selects for 



Fig. 148. Horse Bot Fly. 



1. Male. 2. Female. 3. Maggot. 

 4. Chrysalis, nat. size, after Bracy 

 Clark. 



Fig. 149. Fig. 150. Maggots, or 



Eggs of Horse Horse Bots, attached to 



Bot Fly, nat. Membrane of Stomach, 



size and magni- after Bracy Clark. 



fied, after Bracy 



Clark. 



laying, as the " Knee Bot Fly." In Europe it is to be found from 

 June or July until October. 



The eggs (Fig. 149) are hardly the twelfth of an inch long, white, 

 spindle-shaped at one end, and obliquely truncate at the other, and are 



p p 2 



