60 OLD FLIES IN NEW DRESSES 



bottles, but as they are very similar in 

 appearance it is only necessary to vary the 

 size, as the trout are probably not suffi- 

 ciently scientifically educated to discrimi- 

 nate between the different species. The 

 commonest species of Diptera which are 

 included under the popular names of Blue- 

 and Green-bottles, are the Calliphora 

 erythrocephala, Mg., and Lucilia ccesar, Linn., 

 of which illustrations are given on the 

 Plate of Natural Flies. 



August and September are the best 

 months for these flies, though they come 

 out much earlier. They seem, however, to 

 fall upon the water much more frequently 

 later in the season. They are also very 

 good flies for grayling in October. As I 

 have already said, of the many different 

 species which I have ventured to include 

 under the name Blue-bottle, the com- 

 monest at the water side is Calliphora 

 erythrocephala. This fly is also found in 

 towns. The Green-bottle, however, which 

 I have chosen to represent all the others 

 as being the commonest at the water 

 side is a country fly, Lucilia Ccesar. 

 Some species of Lucilia, the bodies of 



