ENTOMOLOGY

160 SANITARY ENTOMOLOGYing with fly larvre, or to find piles of manure standing for weeks in frontof livery stables, even on the sidewalks.In one small city, the' writer, in passing by a side track where certaingrain companies unloaded straw and feed, using horse drawn wagons~noticed that the ground along these tracks was a thick mixture ofrotting straw, grain, .and horse droppings. This was across the streetfrom the eity market where flies were swarming in the fish stalls especially.Only a personal tour of inspection by a trained observer would turnup many of the most imllortant sources of fly breeding.GarbageNeedless to say it is necessary that garbage be kept in fly-tight canltand that it be removed daily, or every third day when the amount issmall. The army method of building a screened box for holding theFlO. 84.-Top of garbage can with small balloon fly-trap attached.(Bishopp.)garbage cans is very good, and would be an excellent plan for hotels andrestaurants especially. A fly trap on a garbage can will catch manyflies (fig. 34). Empty garbage cans are very attractive to flies. Thewriter has seen many wagons full of cmpty cans which had been washedin lye water, swa,rming with flies, returning to camp. It is, necessary towash the cans in a creosote compound. Householders are very carelessof the cleanliness of their garbage cans. If thcy ~an not wash them theycan rinse them with a hose and treat with a creosote compound or lyewater. When garbage is farmed out for feeding to pigs the farmersshould be bound by contract not to take more than their pigs can consumein a day. The feeding pen should have a cement foundation so that itcan easily be cleaned. The remains of the day's feeding should be burned.Many municipalities, as well as army camps, dispose of the garbage byincineration. Others sell to contractors for reclamation. Some parts ofthe garbage are not of value for feeding or reclamation and the writerhas seen instances where such material was thrown on dumps with tincans and trash and not burned. Great vigjlance is necessary at aU waste