PLATE VI. 



I. 



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- 



,, Cule.w 



8. 



Foot of Dilophus. 



9- 



,, Leptis. 



IO. 



, , Asilus. 



ii. 



,, There va. 



12. 



Profile of Eumerus. 



13- 



,, Syritta. 



14. 



, , Helophilus. 



IS- 



,, Volucella. 



16. 



,, Rhingia. 



(not Criorrhina). 



i7- 



End of the abdomen of Dolichopus. 





(a) The forceps. 





(b) The pennis. 





(c) The lamella;. 



18. 



Head of Psarus, viewed from above, 

 showing frontal process. 



19. 



Shape of the proboscis in Empis. 



20. 



,, ,, Hilara. 



21. 



, , , , Ocydromia. 



22. 



, , , , Euthyneura. 



23- 



Hind-leg of Ramphomyia 



pennata, Mcq. 



24. 



, , Sphcerocera 



subsultans, F. 



24* 



. Palpus of Lispe tentaculata, Deg. 



25- 



Leg of Limnophila — tibia spurred. 



26. 



, , Erioptera — tibia not spurred. 



27. 



Head and double- jointed proboscis 

 of Myopa. 



28. 



Head of Asilus — front view. 



(a) The hollowed vertex. 



(b) The mystax. 



29. Head of Drymia. 



30. Head and proboscis of Stomoxys 



calcitrans, L. 



31. Dorsum of Culex — no cross-seam. 



32. ,, Tipula — shewing the 

 cross-seams (a-a). 



S^. Dorsum of Muscid. 



31, 32, and 33 are merely for the 

 purpose of illustrating- the cross- 

 seam, other characters are disre- 

 garded. 



34. Extremity of the abdomen of Pedicia 



rivosa, L. 



35. Fore part of Stenopteryx, shewing 



the head sunk in the shoulders. 



36. Foot and claws of Hippobosca. 



37. Pupa-case of Calliphora, shewing 



the barrel-pupa and circular 

 emergence -orifice characteristic 

 of the sub -order Cyclorrhapha. 



38. T-shaped emergence-orifice (pupa 



of Dixa — dorsal aspect), and, 



39. A Mummy-pupa (Tipula — ventral 



aspect), both characteristic of 

 the sub-order Orthorrhapha. 



40. Diagram of the Dorsum. 



(1-1) The Humeri. 



(2) The Pra;-sutural Central 



Region. 



(3) The Post-sutural Central 



Region. 



(4-4) The Post-humeral Regions. 

 (5-5) The Alar Regions. 



(6) The Scutellum. 



(7) The Neck. 



(8) The Dorsal Suture. 



(9-9) The Dorso-pleural Sutures. 



(10-ro) The Wing bases. 



(il-ll) The "Scutellar Bridges. 



(12-12) The Alar Frena. 



(13-13) The inner rows of Dorso- 

 central bristles. 



(14-14) The outer rows of Dorso- 

 central bristles. 



41. 



(15) 



The Scutellar Suture. 



Diagram of the Chsetotaxy of an 

 Abdominal Segment. 



(1-1) The Side 

 bristles. 



Fore-marginal 



(2-2) 

 (3) 



(4) 

 (5) 



The Side Hind-marginal 



bristles. 



The Central Fore-marginal 

 bristles. 



The Central Hind-marginal 



bristles. 



The Discal bristles. 



