FLIES FOR A P R I L. 73 



No. 18. HAWTHORN FLY. 



This fly is by some called the black caterpillar. 

 It has good wings, and makes good use of them. 

 It may be seen about the last week in April, when 

 the air is warm, sporting up and down by the sides 

 of hedges, and may then be used. There are three 

 very common species, one of the size represented, 

 another much larger, and another much smaller. 

 The female of each has dark wings, (almost black) ; 

 whereas those of the male are a very pale blue, 

 (almost white). Her head is very much smaller 

 than that of the male, and her body thicker. The 

 male is most abundant. The figure (18) repre- 

 sents him. 



IMITATION'. 



BODY. Black ostrich herl. 



WINGS. From a feather of the sea swallow. 



LEGS. A black cock's hackle ; or one of the 



two largest feathers from a peawit's 



top-knot. 



The fly cannot very easily be made buzz, unless 

 the female is imitated, in which case a black 

 hackle wound over the above mentioned black 

 ostrich herl will answer the purpose. 



