DIPTERA OF MINNESOTA. 



129 



During the four following days the first horse passed 497 bots, the 

 second, in five days, 571 bots. Another party gave one horse 32 

 grams in five hours, and the animal later passed 203 bots. Horses so 

 treated should be carefully watched, and if any bad effects upon the 

 animals appear, treatment should be stopped. We are not aware of 

 this treatment being used in this country. The old and absurd 

 "molasses and milk" remedy has long since been found to be absolutely 

 of no use. 



• THE RED-TAILED BOT FLY, 



G. haemorroidalis, Linn. 



Fig. 123. Red-tailed Bot Fly. Greatly enlarged. Lugger. 



This is another bot fly (see Fig. 123), which evidently occurs 

 in this state, also attacking horses. Its habits are much like those 

 of the species just described, and the same remedial measures will apply. 

 It is claimed that the female deposits her eggs on the mouth, instead 

 of the shoulders and the fore legs. 



NASAL BOT FLY, 



G. nasalis. 



With habits somewhat like the two preceding, as its name im- 

 plies, however, preferring the region near the nose on "chin" for Q.^g 

 laving. Horses seriouslv affected with this bot should receive the 



