HOUSE-FLY INVESTIGATIONS. 



467 



Trial II. — Flypaper (Extirmo). 

 Tested against Trial I. with the following results :- 

 Examined after two days : 



Table 4. 



1. Kitchen 52 Musca against 41 in 3 balloon traps 



2. Servants' Hall ... 135 Musca against 42 in 3 balloon traps 



3. Poultry Shed ... 314 Musca against 18 in 3 balloon traps 



N.B. — Of the House-flies caught in traps 69 % were males. 



Trial III. — Sprays. 



Rooms were sprayed with the following (the windows were 

 netted for two days, then fly-papers were exposed) : — 



1. Fly bane (aromatic disinfecting oil). 



2. Exol. 



3. Army Spray. 



Table 5. 



Flyhane. 



Day after netting was removed : — 



Kitchen. Servants' Mall. 



102 Musca. 105 Musca, eggs laid. 



Exol. 

 Two days after netting was removed :- 



Kitchen. 

 130 Musca. 



Servants' Hall. 

 250 Musca. 



Poultry Shed. 

 40 Musca. 



Foultry Shed. 



Arr)iy Spray. 



This preparation was arrived at late in the season (Islovember), 

 when, under noi-mal conditions, flies had disappeared. It was, 

 therefore, tested in some Army recreation-rooms, in a building 

 where flies were bred for experimental purposes. The conditions 

 were similar to those of ordinary cook-houses and dwelling- 



33* 



