42 



NORTH AMERICAN DIPTRRA. 



& R. 



MAC*. **+&, 



FiK- 15- 



Rhyphus 



(Rhyphidse), 



Fig. 16. 



it Enlonchus 



(Cyrtidse). 



Fig. 17. 



Pantarbes 



(Bombyliidae), 



Fig. 18. 



Cot/ops 



(Conopidae). 



Cx a + 1st A 



Fig. 19. 



*l«« See nop in us 



(Scenopinidae). 



Fig. 20. 



Rhatnphomyia 



(Empididse.) 



nr^Cu, 



Venation, after Comstock and Needliam. 



