1913] North American Dipterous Genus Neurigona 61 



EXPLANATION OF PLATES. 



Fig. L Neurigona rubella Loew, wing and hypopygium of male. 

 " 2. " perplexa n. sp. wing and hypopygium of male. 



" 3. " dimidiata Loew, wing and hypopygium of male. 



" 4. " carbonifer Loew, wing, hypopygium, and tip of front tarsi of 



male. 

 " 5. " nitida n. sp. wing and hypopygium of male. 



" 6. " tridens n. sp. wing of female. 



" 8. " maculata n. sp. wing and hypopygium of male. 



" 9. " fioridula Wheeler, wing and hypopygium of male. 



" 10. " fioridula var. infuscata n. var. wing of female. 



" IL " flava n. sp. wing of female. 



" 12. " aldrichii n. sp. wing, hypopygium, and front tarsi of male. 



" 13. " transversa n. sp. wing of female. 



" 14. " disjuncta n. sp. wing and hypopygium of male. 



" 15. " viridis n. sp. wing and hypopygium of male. 



" 17. " arcuata n. sp. wing, hypopygium, and tip of front tarsi of 



male. 

 " 17a. " arcuata n. sp. wing of female. 



" 18. " deformis n. sp. wing, hypopygium, and tip of front tarsi of 



male. 

 " 18a. " deformis n. sp. wing of female. 



" 19. " tenuis Loew, wing, hypopygium, and tip of front tarsi of male. 



" 20. " pectoralis n. sp. wing, hypopygium, and tip of front tarsi of 



male. 

 " 21. " aestiva n. sp. wing and hypopygium of male. 



" 22. " bivittata n. sp. wing of female. 



" 23. " tarsalis n. sp. wing and hypopygium of male. 



" 25. " lateralis Say, wing and hypopygium of male. 



" 26. " setosa n. sp. wing and hypopygium of male, the latter is 



stretched out backwards. 

 " 27. " tibialis n. sp. wing and hypopygiuin of male. 



" 28. " quadrifasciata Fab. (European) apical part of wing. 



" 29. " ciliata n. sp. wing and hypopygium of male. 



" 30. " perbrevis n. sp. wing, hypopygium, and tip of front tarsi of 



male. 

 " 31. " australis n. sp. wing, hypopygium, and tip of front tarsi of 



male. 

 " 32. " albospinosa n. sp. wing, and hypopygium of male. 



