INTRODUCTORY 



buzzing is by dressing it without wings, 

 and with extra hackle ; and this is, after all, 

 but a poor imitation. In most cases it is 



FIG. 1. 



FIG. 3. 



FIG. 



FIG. 



A 



'"S 



u 



FIG. 2. 



FIG. 4. 



FIG. 6. 



FIG. 8. 



Sketches and diagrams showing the relative positions of the wings 

 to the body in the various natural flies. Figs. 2, 4, 6 and 8 

 show sections through a& in Figs. 1, 3, 5 and 7. In Figs. 

 2, 4, 6 and 8 a = anterior wings ; = body ; 7 = posterior wings. 



better to imitate the wings at rest ; and 

 if this is done accurately, it will present 



