TWO- WINGED FLIES— DIPTERA. 31 



lights its abdomen is black and white, a slight movement 

 however, and it appears of a brilliant metallic silvery lustre. 

 I believe entomologists delight to call it Thereva nohilata. 



The Grey Wood Fly (fig. 24) is probably known to all 

 {Sarcophaga carnana). It is useful alive to dap with, and 

 dead as a pattern to copy. It floats well, and is quite 

 worth imitation in various sizes. 



The Dipteron shown in fig. 25 is very common among 

 the rushes. We have frequently seen it taken, and have 

 also had some success with its imitations. 



Fig. 26 is a very beautiful Bronze Bottle, and a rival to 

 the Green Insect, to which it makes a useful variety, but it 

 is seldom seen except in bright weather, when at times it is 

 abundant. 



Fig. 27 is also a fly delighting in sunshine, and its 

 imitations are most successful in bright weather — it is 

 one of the DoUchopidce or Metallic-flies. 



Fig. 28 is the Big Welsh Blue-bottle {Cynomya 

 mortuorum), useful at times, but too big for general use. 



Some of the flies in this plate are found flying and 

 sporting about the water intent on their business, 

 others, when a moderate wind is blowing, are landed 

 there by no wish of their own, and as a consequence 

 the artificials are most frequently taken under these 

 conditions. However, the bright coloured ones we 

 have frequently found highly successful under calm 

 conditions with bright sunshine. The Silver Tail, 

 the Green Insect, the MetaUic-fly, and a Hoverer have 

 all met with marked success under these conditions. 



