34. Tephritis corniculata LVII.—PHORIDÆ 35. Phora rufipes XL.—MICROPEZIDÆ 36. Micropeza corrigiolata LI.—CHLOROPIDÆ 37. Centor cereris LIV.—PHYTOMYZIDÆ 38. Chromatomyia affinis LVI.—BOBORIDÆ 39. Limosina fontinalis LVIII.—HIPPOBOSCIDÆ 40. Hippobosca equina [Illustration: PLATE V. (APPENDIX).] PLATE VI 1. Head of Mycetophila to show the position of the two ocelli. 2. Fore-leg of Dilophus 3. Fore-leg of Bibio 4. Palpus of Limnobia 5. Palpus of Tipula 6. Palpus of Anopheles 7. Palpus of Culex 8. Foot of Dilophus 9. Foot of Leptis 10. Foot of Asilus 11. Foot of Thereva 12. Profile of Eumerus 13. Profile of Syritta 14. Profile of Helophilus 15. Profile of Volucella 16. Profile of Rhingia 17. End of abdomen of Dolichopus 4 (_a_) the forceps (_b_) the pennis (_c_) the lamellæ 18. Head of Psarus, viewed from above, showing frontal process 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 Sphœrocera subsultans 24-1/2. Palpus of Lispe tentaculata 25. Leg of Limnophila—tibia spurred 26. Leg of Erioptera—tibia not spurred 27. Head and double-jointed proboscis of Myopa 28. Head of Asilus—front view 4 (_a_) the hollowed vertex (_b_) 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 (disregarding characters other than cross-seams) 34. Extremity of abdomen of Pedicia rivosa 35. Head of Stenopteryx sunk in shoulders 36. Foot and claws of Hippobosca 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 4 (1-1) Humeri or Shoulders (2) Præ-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 (11-11) 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 Chætotaxy of an Abdominal Segment 4 (1-1) Side Fore-marginal bristles (2-2) Side Hind-marginal bristles (3) Central Fore-marginal bristles (4) Central Hind-marginal bristles (5) Discal bristles [Illustration: PLATE VI. (APPENDIX).] PLATE VII 1. Profile of Dorycera graminum 2. Profile of Trigonometopus frontalis 3. Profile of Platystoma seminationis 4. Profile of Ceroxys crassipennis 5. Head of Chilosia maculata ♂ 6. Fore-leg of Platychirus manicatus, ♂ (5 should be 6). 7. Fore-leg of Platychirus peltatus, ♂ 8. Fore-leg of Platychirus scutatus, ♂