38 THE TURKEY BROWN 



little value to the fisherman, and Mr. Halford 

 states that he has never yet found it in the 

 autopsies of fish he has killed on the Test or 

 Itchen. 



The imago is apt to be confused with another 

 insect, Rhithrogena semicolorata, which it greatly 

 resembles. The latter insect may be distin- 

 guished by what Mr. Eaton calls a " sub- 

 median, triangular, longitudinal black streak " 

 on the femora. The imago is often described as 

 the yellow upright, and is extremely plentiful 

 on many streams other than chalk-streams. 



Family . . EPHEMERID.E 

 Genus . . Leptophlebia 

 Species . . submarginata 



PLATE VII 



The turkey brown (Leptophlebia submar- 

 ginata) is sometimes confused with the march 

 brown, although much smaller, especially if 

 one of its three setae has been accidentally 

 broken off. Usually, however, the magnifying 

 glass will reveal the broken stump. The sub- 

 imago is a prettily marked insect, the wings 

 being shaded with dark brown or fawn colour. 

 It does not seem to be much appreciated by 

 the trout. The female imago is a handsome 

 fly with a rich plum-coloured body. 



Closely allied is Leptophlebia vespertina, which 

 is known as the claret dun in Ireland, and 

 occurs mainly on still waters, though it has been 



