HOUSEHOLD AND CAMP INSECTS 77 



9 Be certain that everything is all right and nobody in the build- 

 ing or room. Notify occupants of adjacent rooms or houses 

 that the fumigation is to be commenced. 



10 Drop in the cyanide, preferably y from near the exit and close 



tightly. 



11 Adopt suitable precautions to prevent the room or building 



being entered during the fumigation period. 



12 Open the ventilators from the outside. 



13 After the building has been thoroughly aerated, remove the 



generators and take care of their contents together with any 

 excess of cyanide. 



ANIMAL PESTS 



Domestic animals, especially horses, are greatly disturbed and 

 occasionally seriously injured by the activities of various flies and 

 parasites, and below are given well-recognized preventive or 

 remedial measures for some of the more common occurring under 

 field conditions. 



The bot fly 96 of the horse is a rather common insect which 

 deposits its eggs on the hairs of the shoulders, forelegs, under 

 side of the body, most commonly on the forelegs and shoulders. 

 The eggs hatch when the horse licks itself and the ingested maggots 

 establish themselves upon the inner walls of the stomach. The 

 presence of but a few would probably have little effect, while large 

 numbers must seriously interfere with the processes of digestion and 

 assimilation. 



Systematic currying or cleaning is of material assistance in dis- 

 lodging the eggs and thus preventing the maggots developing. A 

 mixture consisting of oil of tar i ounce, and olive oil 6 ounces, 

 should be smeared daily on the chin and legs of the animal, and if 

 there is an infestation of bots, the horse should be given 2 ounces 

 of turpentine in I pint of raw linseed oil, followed in a few days 

 by a dose of Barbadoes aloes. 97 This internal treatment should be 

 given under the direction of a veterinarian. 



The horn fly 98 is a recently established small fly which breeds 

 in cow dung and is especially injurious to cattle, displaying a 

 marked preference for the bases of the horns; hence the common 

 name. 



96 Gastrophilus equi Fabr. 

 97 Queensland Jour., 5 136. 1916. 

 98 Haematobia serrata Rob. Desv. 



