600 

 500 





I 



LENGTH 



Insects 



Wing Length - millimeters 



I I I I I \ L 



J L 



7 8 9 10 



50 60 70 



Fig. 12 — Wing-beat rate and wing length for insects 



GROUP 1 



HYMENOPTERA 



TEREBRANTIA 

 Nemeritis 



DIPT ERA 



NEMATOCERA 

 Trichocera 



BRACHYCERA 

 Drosophila 



