VARIOUS FLIES HYMENOPTERA, &c. 63 



Fig. 85 is one of the most beautiful flies indigenous 

 to this country. It is the fire tail (chrysis ignita), and 

 is an enemy to the common wasp, in whose nests it lays 

 its eggs, the larvae, on hatching out, preying on the 

 young wasps. It is quite common, but so quick on 

 the wing, that it is most difficult to catch. It delights 

 in sunshine, and its brilliant colours which change 

 with every movement now reel, now green, now blue- 

 are beautiful in the extreme. On bright days we have 

 done well with its imitation in deep waters. 



Fig. 86 is another ichneumon fly (green nematiis}. 

 It is very common, and appears about June and after. 

 It is a fine green colour, and makes a capital lure. 



Fig. 87 is a dipteron, which appears regularly in 

 August (pxycera trilincatd). It is another beautiful 

 llv, and its fine blending of green and black and reel 

 make a very fine and alluring combination in an 

 artificial. 



Fig. 88 is the grass bug, one of the hemiptera 

 It appears in thousands in some localities when the 

 grass is getting long, and on a winely day is well 

 worth trying. 



There is also another of this species, slightly 

 smaller than the brown one here figured, it is green in 

 colour. 



Fig. 89 is a small green aphis, similar to those 

 found on rose trees. It often occurs in countless 

 numbers on marginal plants and bushes, and a strong 

 gust of wind blows it on to the water, often causing a 

 wild rise of trout, grayling, and other fish. 



