48 DIpTERA of MINNESOTA. 



attacks of these pests. One application is effective for from one-half 

 to one hour, or as long as the surface of the skin remains moist with 

 the oil, if not longer than that if the creatures are not very numerous 

 or very hungry. Care should be observed not to get it into one's 

 eyes. Every one to whom this has been recommended, and who has 

 used it, speaks highly of its efficacy. When in camp in the woods, 

 the writer uses a home made canopy, manufactured from mosquito 

 bar, about six feet wide, by seven feet long and three feet high. The 

 bough bed made six feet by seven, a post is driven at each corner to 



Copyright, looc, bv \< tu I vni.iii I'lidrruuc 



How mosquitoes breed in the absence of the goldfish 



Fig. 35. (From "How to Make a Flower Garden", Doubleday, Page & Co.) 



project above the surface of the ground about two and one-half feet. 

 Over this the canopy is thrown, the edges tucked under the bed, 

 thus making an inverted box of netting, as it were, and under which 

 one is secure from attack. As an auxiliary I have a curtain of netting 

 over the door of the tent. Smudges are, of course, also effective, 

 but disagreeable. 



