Wingate : Collecting Diptera — a Few Useful Dodges. 163 



in diameter, and sew the open end of the net on to it in such 

 a way that the edge S.T. will be free and outside the net (see 

 Fig. 2), and pointing- upwards. Then make a number of little 

 bags about seven or eight inches long with a celluloid wa*tch 

 cover at the smaller end E, and another whalebone ring D at 

 the other. This ring must be a little smaller than B so as to fit 

 loosely inside it, and the free edge of the whalebone must be 

 inside the bag- (see Fig. 2), and pointing downwards. Now by 

 slightly compressing B you can pass the larger ring through the 

 smaller into the bag, and fit it round the outside of the small ring- 

 (see Fig. 2), joining the bag C quickly and firmly to the net A, 



and giving an easy entrance from A to C, but a less easy exit 

 from C to A. Then I have a tin with an air-tight lid, like 

 a pound paint tin, only twice as long — mine is an old toffee tin 

 the inside and bottom covered with two or three sheets of 

 blotting paper on which are dropped 10 or 12 drops of benzine. 

 The flies are swept into C, which is compressed about F with 

 the left hand to prevent their exit. B is pressed inwards and 

 then pulled sideways through I), and the bag with the flies in 

 it detached, popped into the benzine tin and another bag like C 

 — I carry four or five in my pocket is attached to the net. The 

 whole operation scarcely takes a minute. And another great 

 iq<x> J une 1 . 



