PLATE VI 



1. Head of Mycetophila to show 



the position of the two 

 ocelli. 



2. Fore-leg of Dilophus 

 3- Bibio 



4. Palpus of Limnobia 



5. Tipula 



6. Anopheles 



7. Culex 



8. Foot of Dilophus 



9. Leptis 



10. Asilus 



11. Thereva 



12. Profile of Eumerus 



13. Syritta 



14. Helophilus 



15. Volucella 



16. Rhingia 



17. End of abdomen of Doli- 



chopus 



(rt) the forceps 



(b) the pennis 



(c) the lamellae 



18. Head of Psarus, viewed from 



above, showing frontal pro- 

 cess 



19. Shape of the proboscis in 



Empis 



20. Shape of the proboscis in 



Hilara 



21. Shape of the proboscis in 



Ocydromia 



22. Shape of the proboscis in 



Euthyneura 



23. Hind leg of Ramphomyia 



pennata 



24. Hind leg of Sphcerocera 



subsultans 

 24^. Palpus of Lispe tentaculata 



25. Leg of Limnophila tibia 



spurred 



26. Leg of Erioptera tibia not 



spurred 



27. Head and double-jointed pro- 



boscis of Myopa 



28. Head of Asilus front view 



(<*) the hollowed vertex 

 (6) the mystax 



29. Head of Drymia 



30. Head and proboscis of 



Stomoxys calcitrans 



31. Dorsum of Culex no cross- 



seam 



32. Dorsum of Tipula cross- 



seams (a a), (disregarding 

 characters other than cross- 

 seams) 



33. Dorsum of Muscid (disre- 



garding characters other 

 than cross-seams) 



34. Extremity of abdomen of 



Pedicia rivosa 



35. Head of Stenopteryx sunk 



in shoulders 



36. Foot and claws of Hippo- 



bosca 



37. Puparium of Calliphora 



38. T-shaped emergence-orifice 



in the pupa of Dixa dorsal 

 aspect 



39. A mummy-pupa (Tipula) 



40. Diagram of the Dorsum 



(l-l) Humeri or Shoulders 



(2) Prae-sutural Central 

 Region 



(3) Post-sutural Central 

 Region 



(4-4) Post-humeral Region 

 (5-5) Alar Regions 



(6) The Scutellum 



(7) The Neck 



(8) Dorsal Suture 



(9-9) Dorso-pleural Sutures 

 (10-10) Wing bases 

 (II-II) Scutellar Bridges 

 (12-12) The Alar Frena 

 (13-13) Inner rows of 



Dorso-central Bristles 

 (14-14) Outer rows of 



Dorso-central Bristles 

 (15) The Scutellar Suture 



41. Diagramatic Chaetotaxy of 



an Abdominal Segment 

 (I-I) Side Fore-marginal 



bristles 

 (2-2) Side Hind-marginal 



bristles 



(3) Central Fore-marginal 

 bristles 



(4) Central Hind-marginal 

 bristles 



(5) Discal bristles 





104 



