REMEDIES AGAINST FLIES. 165 



may carry away on their bodies disease-germs of all kinds. 

 Settling again upon a healthy being they may communicate 

 such a disease by contact. In this manner diseases have 

 been carried about by such flies. Again some of them can 

 eat the eggs of various parasitic worms, and discharge them 

 unharmed with their f^ces. It has been demonstrated that 

 several internal parasites of man have thus been distributed. 

 Dr. Grassi has sho\vn that the eggs of the tape-worm 

 {Tienla solium.) and of Trlcoce2)hahis disjxir were carried hj 

 the common house-fly. 



How to protect man and animals against flies in houses 

 and stables is not an uncommon question. It is not difficult 

 at all to prevent all such tormenters as house-flies, stable- 

 flies, flesh- and blow-flies, mosquitoes and others from biting 

 us in our homes, or our domesticated animals in their 

 stables, nor is it very expensive. Persian and Dalmation 

 insect-po-wder, or Buhach, is a most excellent substance for 

 this purpose, and if not too old or too much adulterated 

 will succeed. It can be applied in several ways; as a powder 

 or as fumes. The former should be blown in the air; the 

 latter should be burned upon an old saucer or plate. A very 

 nice way is to form the finely powdered and slightly moistened 

 pyrethrum into cones, which after being dried in an oven can be 

 ignited at the apex, ^vhen they will slowly burn and give off" 

 the deadly fumes. Only a small amount is required, provid- 

 ing the doors and windows are closed, the quantity depend- 

 ing upon the qualit3^ of the powder. All flies in rooms or 

 stables will soon show the effects of this insect-powder; they 

 either die from it, or become too disabled to do mischief for 

 quite a while. 



According to the "Denver Field and Farm" of April 25, 

 1896, a machine for catching flies from the backs of cattle, 

 and so affording the animals relief and comfort, has been in- 

 vented by a farmer in Madison County, Kentucky. The fly- 

 catcher is a kind of covered pen or passagewaj% through 

 which the animal must w^alk to secure relief. A few feet 

 from the entrance there is a'cupola, or dome, in the roof of 

 the passage-way, made of glass and arranged as a fly-trap. 

 Beyond this the passage-waj^ is in darkness. The animal 



