ag INSECTS 
b, the middle part, also made of screen, shaped like the roof of a 
house, having holes in the peak through which the flies enter the jail. 
a, the base, board upon which rest two tin bait pans. 
The space between a and 0 is 3 inch. 
The space between 0 and the bait pan is 3 inch. 
10. War on the house fly. — Try a season’s campaign against flies 
and see to what extent you can reduce their number. If you live on 
the farm and have no close neighbors, you can fight the war alone, but 
in a village or town the codperation of the whole community must be 
secured. Some cities as large as Cleveland, Ohio, have conducted such 
a campaign and report a sweeping victory. The operations must follow 
SWE VIEW AND CROSS-SECTION OF FLy TRAP 
along these lines: ‘In the early spring clean up all refuse heaps, filth 
of all kinds, manure piles, garbage heaps, old cans, trash of all sorts, 
and abolish as far as possible open vaults and earth closets. Screens 
should be used freely on all doors and windows. The prompt disposal 
of garbage should be arranged for and swill barrels and garbage cans 
should be tightly closed. Use some form of fly trap with the proper 
bait early, and continuously; place it where it will do the most good.” 
(From circular No. 26, State Entomologist of Minnesota.) 
11. Ants. — Nests of ants are often found under boards and stones 
and in the ground near plants. Others make little mounds of earth, 
“ant hills,” that are several inches high and several feet across. They 
are especially interesting. Note the openings leading down into the 
ground; see whether the ants go in and out of these. Are they carrying 
things? With a stick dig up a portion of the mound; how do the ants 
behave now? Do you see some white objects looking like small grains 
of rice? These are young ants in the pupa stage. The pup# themselves 
are in these tiny white bags or cocoons. Note the care taken of these 
