DIPTERA 59 



ing upon these tiny flies, it is very probable 

 that they will refuse all imitations, for 

 many species which serve them as food are 

 too small to imitate. 



BLUE-BOTTLE AND GREEN-BOTTLE 



The Blue-bottle and Green-bottle, though 

 perhaps some of the commonest of flies, are 

 but little used by the fly-fisherman. The 

 success met with in using the natural fly 

 is very small. The reason for this want of 

 success is the position in which the wings 

 of the imitation are put by the fly-dresser. 

 In this case, like that of the Alder, the fault 

 does not lie with the fly-dresser, as the 

 writers on fly-dressing direct that the wings 

 should be put on in the same position as 

 those of every other fly that is, in an up- 

 right position. Any one, as I have said 

 before, on the most casual observation 

 must realise that the wings of a Blue-bottle 

 and the wings of a May-fly do not lie in 

 quite the same position in relation to the 

 body. 



There are many Diptera which come 

 under the names of Blue- and Green- 



