IMPoirrANT I LIES 1 1 



ill feeding for two weeks witlimit grtliiig (•an<4;lil. In tliis 

 ease no more eggs will he laid, and tlu' pests will vanish. 

 Possible multiplication. Allowing ten days for i'\^^^s tn 

 heconie adnlts, and, for conxcnience, It'ii days of frcMJiii^ 

 hetween eniero-enee and o\ inosilion, fiL'nriin'- ilial a llv la\s 

 one hnndi'ei] and fiftv eggs at a hatch and lives to l;i\- six 

 hatches, eoni[)nte the increase of a pair of llies heginning to 

 lay May first. Half the i)rogenv are snppose(l to l)e females. 

 Test the following ligni-es: 



May 1(1 l.")-J Hi.-s 



I'd M)'2 tli.'s 



:;(i ll,7(rj tii«'s 



June 1(1 :}4,:{0L> fli.-s 



•JO !)ll,J>:)-2 Hies 



■M) (1,484,700 flirs 



July 10 7-2,280,SOO rti.-s 



' 20 :vjr),o:i:i,800 flies 



;}() 1 :>,7}(;.(i70..')Oo flifs 



The common-sense cpiestion is. Why not let this pair of 

 flies catch themselves in May ? This rapid ineiu'ase also means 

 that anythingf short of extermination is hardly worth the etVori. 

 A fly is possessed of no more ennning than shot rolling down 

 a ])oard, and the last pair will run iiit(^ a trap as easily as the 

 lirst. Why ]n)t let them all catch themsidves? 



Hibernation. Yovv few house flies snrvixc the winter in 

 Canada and the northern states, and these hihernaie as young 

 adnlts in cracks ahoiit hnildings. They come out ot winter 

 (piarters ravenonsly hnngry and fee(l lor ahout a wt'ck. at 

 least, hefore heo-innhig to lav. if at this critical tiuu- e\eiv 

 household had some effective form of outdoor trap ready tor 

 them, every earlv sju-ing hreeder would he i-aught, and the 



1 This last figure would eiiual about 14:i(i7.> bushels of flies from one pair 

 in three months. If we continue the breeding through Aupist and Septem- 

 ber, the figure is 1.000.181. 240..310.720.O(M).oO0.(.)O0.(MH) fli.-^. 



