PARK SANITATION 



885 



PLATE No. 355 

 THE OBER FLYTRAP 



be greatly reduced in numbers by the disposal of excreta in such a manner 

 as either to prevent the female fly from reaching it or so as to destroy the 

 eggs or the larvae. The methods of disposing of human excreta and manure 

 have been described under disposal of waste. 



Three methods of destroying the adult fly are in common use: by 

 traps, by fly paper or by poison. Of these methods, trapping has been 

 found to be the most effective for camp use, although 

 usually more than one measure is employed. 



Flytraps are of various forms and sizes. The 

 Ober flytrap, as shown in Plates 355 and 356, is a 

 very good model, as in addition to being a very 

 effective trap, it has the advantage that it is inex- 

 pensive and can be very quickly and easily con- 

 structed. Two triangles are made from a twelve-inch 

 board, and a small triangle is cut from the base of Wit ^ one small triangle fas . 

 each of the larger triangles. The larger triangles tened with wooden buttons. (War 



1-1 Department: Document No.897.) 



are connected by three light sticks of any desired 



length, usually about eighteen inches. The screening is tacked to the small 

 triangle at the junction of one of the sides and the base. It is then fastened 



over the apex of the small 

 triangle and down the other 

 side to the corner of base 

 and side, whence it is car- 

 ried around the large tri- 

 angle back to the starting 

 point. Both ends of the trap 

 are constructed in this man- 

 ner and one of the small 

 triangles is then nailed back 

 into place, the other being 

 fastened to the larger tri- 

 angle with wooden buttons 

 to facilitate the removal of 

 the flies. In some models 

 both small triangles are 



DETAILS OF THE OBER FLYTRAP nailed fagt and & sm ^ doQr 



A door is shown at B through which the flies can be removed ' rr\AC\f* in nnp nf trip laro-pr 

 after the trap has been immersed in water or flamed. letlger 



triangles through which the 



flies can be removed from the trap. Small holes, each the size of a pencil, 

 and about one inch apart, are punched through the fold of the screening 

 which extends from the apex of one small triangle to the apex of the other. 



A . WD'S OFTKAP 

 B . DOOH FOR RtMCYINf ft-fi 

 C . E.HO'3 TOR INSIDE SCREEN 

 . TOP C0WVC7//VS flMt. 

 C . IHDS OF TRAP 



r . sorrow coN/vfCTtM RUL 



. SUPPORTING- KAIL 

 M. SMfiLL HOLIS.PUHCHCO 



THUOUSH IHS/0 6C/tl!ff 



