THE GRAVEL BED 79 



fly as well as of the pupae found in autopsies 

 when the fly is *'on." 



Order . . Diptera 



Family . . LIMNOBID.E 



Genus . . Anisomera 



Species . . burmeisteri 



PLATE XVI 



It is with some hesitation that I have included The 

 an account of the gravel bed amongst these 



brief notes on the trout fisherman's flies. Per- burr 

 sonally I have never met with it 'alive, and 

 know nothing about its habits from my own 

 observation. I am told that it is to be found 

 in great numbers at certain times and in cer- 

 tain seasons. on the dry gravel banks that form 

 in the bed of rivers which it frequents, and that 

 the trout will feed upon it greedily. Just as 

 this work was nearing completion, two corre- 

 spondents sent me the insect they knew as the 

 gravel bed, and these specimens were similar 

 to a fly sent me some years ago by a third 

 correspondent under the same popular name. 



The independent testimony of my three 

 friends seemed a sufficiently safe indication 

 that I had the real gravel bed before me. I 

 therefore sent specimens to Mr. E. E. Austen 

 of the Natural History Museum, one of the 

 leading authorities on the Diptera, and he, with 

 his usual kindness, gave the matter his per- 



