DOMESTIC ANIMALS. 



185 



in the horse and are well illustrated in Fig. 83. The 

 origin of the bot is traced to the gad fly, seen in Fig. 

 84. 



Fig. 84. Gad fly. 



During the later summer months these flies may be 

 seen about the knees and legs of horses at pasture, lay- 

 ing their eggs, which are carried into the stomach by 

 the horse licking the hair. On arriving in the stomach, 

 which is the natural habitat of the grub, they fasten 

 themselves to the mucus membrane, and there remain 

 for perhaps several months. In some cases they are so 

 numerous as to materially interfere with the process of 

 digestion, and the horse will lose> flesh and suffer undue 

 irritation of the stomach. In such cases it will be 

 necessary to get them out of the system, for which pur- 

 pose DR. HEARD'S WORM P^fifcRS are an excellent 

 remedy. They should be giv^Sar 2 or 3 weeks after 

 the discovery of the bots. 



