40 



NORTH AMERICAN DIPTERA 



C Sc, R 



Co, Ml 



1st A Cii 



^5 16 



Cii, IW, 



Cu, IH4 



laiX 



1st A M, ^' 



2nd A 



1st A 



2adA- 



Cu, N, 



Tipuloidea. Plate 11. — 11. Protoplasa fitchii, venation: 12. Ptychoptera rufocincta, 

 venation; 13. Trichocera colei, venation; 14. Anisopus alteinatus, venation; 15. Axymyia 

 furcata, venation ; 16. Mycteboia divergens, venation ; IT. Megistocera longipennis. venation ; 

 18. Brachypremna dispellens, venation ; 19. Dolichopeza (Dolichopeza) ameiicana, venation ; 

 20. Tipula (Tipula) dorsomacula, venation. 



