II.—CECIDOMYIDÆ

1. Epidosis longipes, ?

2. Asphondylia sarothamni

III.—MYCETOPHILIDÆ

3. Sciara thomÆ

4. Mycetophila cingulum

5. Mycetobia pallipes

6. Macrocera lutea

IV.—BIBIONIDÆ

7. Bibio marci, ?

8. Scatopse notata

V.—SIMULIDÆ

9. Simulium reptans

VI.—CHIRONOMIDÆ

10. Chironomus plumosus

11. Ceratopogon femoratus, ?

12. Clunio marinus

IX.—CULICIDÆ

13. Mochlonyx velutinus

14. Corethra plumicornis, ?

XII.—LIMNOBIDÆ

15. Limnophila dispar

16. Rhipidia maculata, ?

17. Erioptera flavescens

18. Trichocera hiemalis

XI.—PTYCHOPTERIDÆ

19. Ptychoptera contaminata

XIII.—TIPULIDÆ

20. Tipula gigantea

21. Ctenophora pectinicornis

XIV.—RHYPHIDÆ

22. Rhyphos cinctus

XV.—STRATIOMYIDÆ

1. Pachygaster atra

2. Oxycera pulchella

3. Stratiomys chamÆleon

4. Sargus cuprarius

5. Beris chalybeata

6. Nemotelus uliginosus

XVI.—TABANIDÆ

7. Chrysops cÆcutiens

8. HÆmatopota pluvialis

9. Tabanus bovinus

XVII.—LEPTIDÆ

10. Chrysopilus auratus

11. Leptis scolopacea

12. Atherix ibis

13. Symphoromyia melaena

14. Spania nigra

XVIII.—ASILIDÆ

15. Leptogaster cylindrica

16. Dioctria oelandica

17. Isopogon brevirostris

18. Laphria marginata

19. Asilus crabroniformis

XIX.—BOMBYLIDÆ

20. Anthrax hottentota

21. Bombylius major

XX.—THEREVIDÆ

22. Thereva annulata

XXI.—SCENOPINIDÆ

23. Scenopinus fenestralis

XXIII.—EMPIDÆ

24a. Empis livida

24b. Empis borealis

25. Ardoptera irrorata

26. Ocydromia glabricula

27. Stilpon lunata

28a. Clinocera stagnalis

28b. Clinocera lota

29. Hybos grossipes

30. Tachista arrogans

31. Chersodromia hirta

32. Cyrtoma spuria

XXIV.—DOLICHOPODIDÆ

33. Psilopus wiedemanni

34a. Dolichopus longicornis

34b. Dolichopus discifer

35. Chrysotus gramineus

36. Rhaphium longicorne

37. Medeterus diadema

XXV.—LONCHOPTERIDÆ

38. Lonchoptera lutea

XXVI.—PLATYPEZIDÆ

39. Platycnema pulicaria

40. Platypeza picta

XXVII.—PIPUNCULIDÆ

41. Chalarus spurius

42. Pipunculus campestris

XXVIII.—SYRPHIDÆ

43. Volucella bombylans

44. Xylota sylvarum

45. Orthoneura elegans

46. Chrysotoxum arcuatum

XXIX.—CONOPIDÆ

47. Myopa buccata

48. Physocephala rufipes

XXXI.—TACHINIDÆ

49. Zophomyia temula

50. Sarcophaga carnaria

XXXII.—MUSCIDÆ

51. Calliphora vomitoria

XXXIV.—CORDYLURIDÆ

52. Coniosternum obscurum

53. Scatophaga stercoraria

XXXVIII.—SCIOMYZIDÆ

54. Tetanocera ferruginea

LVI.—BORBORIDÆ

55. Borborus nitidus

XXX.—ŒSTRIDÆ

56. Hypoderma bovis

LVII.—PHORIDÆ

57. Phora incrassata

II.—CECIDOMYIDÆ

1. Cecidomyia rosaria

2. Lasioptera rubi

3. Catocha latipes

III.—MYCETOPHILIDÆ

4. Sciara thomÆ

5. Mycetophila cingulum

6. Macrocera lutea

IV.—BIBIONIDÆ

7. Bibio pomonÆ

V.—SIMULIDÆ

8. Simulium reptans

VI.—CHIRONOMIDÆ

9. Ceratopogon illustris

10. Chironomus plumosus

11. Tanypus monilis

VIII.—PSYCHODIDÆ

12. Psychoda sexpunctata

IX.—CULICIDÆ

13. Culex annulatus

X.—DIXIDÆ

14. Dixa maculata

XI.—PTYCHOPTERIDÆ

15. Ptychoptera contaminata

XIV.—RHYPHIDÆ

16. Rhyphus cinctus

XII.—LIMNOBIDÆ

17. Dicranomyia stigmatica

18. Rhipida maculata

19. Symplecta punctipennis

20. Erioptera fuscipennis

21. Limnophila nemoralis

22. Trichocera hiemalis

XIII.—TIPULIDÆ

23. Nephrotoma dorsalis

24. Dolichopeza sylvicola

25. Pachyrrhina crocata

26. Tipula gigantea

XV.—STRATIOMYIDÆ

1. Sargus cuprarius

XVI.—TABANIDÆ

2. Tabanus bovinus

XVII.—LEPTIDÆ

3. Leptis scolopacea

XVIII.—ASILIDÆ

4. Asilus crabroniformis

5. Isopogon brevirostris

XIX.—BOMBYLIDÆ

6. Bombylius major

7. Anthrax hottentota

XX.—THEREVIDÆ

8. Thereva nobilitata

XXI.—SCENOPINIDÆ

9. Scenopinus fenestralis

XXIII.—EMPIDÆ

10. Empis livida

11. Ocydromia glabricula

12. Stilpon lunata

XXII.—CYRTIDÆ

13. Acrocera globulus

XXIV.—DOLICHOPODIDÆ

14. Dolichopus plumipes

15. Medeterus diadema

XXV.—LONCHOPTERIDÆ

16. Lonchoptera lutea, male. The dotted line shows V, 6 in the female.

XXVI.—PLATYPEZIDÆ

17. Platypeza picta

XXVII.—PIPUNCULIDÆ

18. Verralia aucta

XXVIII.—SYRPHIDÆ

19. Syritta pipiens

19-1/2. Eumerus sabulonum

20. Eristalis tenax

21. Brachyopa bicolor

XXIX.—CONOPIDÆ

21-1/2. Physocephala rufipes

XXX.—ŒSTRIDÆ

22. Gastrophilus equi

23. Œstrus ovis

XXXI.—TACHINIDÆ

24. Gymnosoma rotundatum

25. Cercomyia thoracica

26. Dexiosoma caninum

27. Sarcophaga carnaria

XXXII.—MUSCIDÆ

28. Calliphora erythrocephala

29. Mesembrina meridiana

XXXIII.—ANTHOMYIDÆ

30. Anthomyia pluvialis

XXXIV.—CORDYLURIDÆ

31. Scatophaga stercoraria

XXXVIII.—SCIOMYZIDÆ

32. Tetanocera ferruginea

XXXIX.—PSILIDÆ

33. Psila fimentaria

XLII.—TRIPETIDÆ

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

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 Sphoerocera 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

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, ?

9. Fore-leg of Platychirus albimanus, ?

10. Fore-leg of Platychirus clypeatus, ?

11. Platychirus, ? and ?, quadrate spotting

12. Melanostoma mellinum, ? triangular spotting

13. Larva of Microdon

14. Wing of Helomyza pallida

15 & 16. Diagram of a fly's leg. Vide C, I, on page 91.

15. As viewed from behind

16. As viewed, horizontal section (through A-B) 4 (b.f.) base of femur

(t.f.) tip of femur

(b.t.) base of tibia

(t.t.) tip of tibia

(1) upper or outer side

(2) under or inner side

(3) hinder side

(4) fore side

(5) upper fore side

(6) upper hind side

(7) under hind side

(8) under fore side

17 & 18. Base of wing, illustrating the difference in O, 6¹ respectively in

17. Urophora

18. Trypeta

19. Profile of Drosophila

20. Profile of Ceratomyza denticornis

21. Profile of Tichomyza fusca

22. AntennÆ of Notophila cinerea; note the "thorn" on second joint

23. AntennÆ of Hydrellia griseola

24. AntennÆ of Tichomyza fusca

25. Profile of Hydrellia griseola

26. Profile of Ochthera mantis

27. Wing of Borborus equinus

28. Wing of Limosina sylvatica

29. Section of a collector's net, showing 4

(a) the small end of a large net;

(b) a detachable muslin bag;

(c) elastic closing the bag;

(d) transparent celluloid end

30. A small bag, closed and detached

31. Box for carrying bags