TWO-WINGED FLlES—n/PTERA. 29 



certain liohts 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 nobilata. 



The grey wood fly (fig. 24) is probably known to 

 all (sarcophaga carnarid). It is useful alive to dip 

 with, and dead as a pattern to copy ; it floats well, and 

 is quite worth imitation in various sizes. 



The dipteron shewn 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 dolichopoda or metallic flies. 



Fig. 28 is the big Welsh blue bottle [cynomya 

 inortuorunt), 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 metallic fly. and a hoverer have all 

 met with marked success under these conditions. 



