Explanation of Figures. ^ 279 



Plate VI. 



19. Bittacomorpha clavipes, pupa, dorsal view. 



20. Portion of respiratory tube of pupa, enlarged. 



21. Spine such as the pupa is covered with. 



22. Last segment of male pupa, dorsal view, showing 



scar left by larval respiratory tube. 



23. Erioptera? sp.(a), larva, dorsal view. 



24. End of last segment of larva. 



25. Ventral view of one side of same. 



Plate VII. 



26. Symplecta punctipennis, larva, dorsal view. 



27. End of last segment of larva. 



28. Pupa, dorsal view. 



29. Limnophila luteipennis^ larva, dorsal view. 



Plate VIII. 



30. Limnophila luteipennis, end of last segment of larva. 



31. Pupa, dorsal view. 



32. Tipula ehita, larva, dorsal view. 



33. End of last segment of larva. 



Plate IX. 



34. Tipula eluta, pupa, dorsal view. 



35. Tipula larva (b), dorsal view. 



36. End of last segment of larva. 



37. Tipula sp. {e), end of last segment of larva. 



38. Last two segments of female pupa, side view. 



39. Pachyrhina ferniginea, end of last segment of larva. 



Plate X. 



40. Pachyrhina ferruginea^ last two segments of female 



pupa, side view. 



41. Chrysops vittatus, larva, dorsal view. 



42. Chrysops cBstuxins, eg^ mass on stem of Jvm,cus effusus, 



43. Tahanus lineola, pupa, dorsal view. 



44. Abdominal spiracle of pupa. 



45. Left thoracic spiracle of pupa. 



