EXPLANATION OF PLATE XI. 



Fig. 



1. Oxycera morrisii (?) Larva, from above. 



2. Head, from above. 



3. Dorsal bristle, and group of Vesicles. 



4. Last two segments from beneath, showing the hooks of the penul- 



timate segment. 



5. Nemotelus uliginosus Pupa case, from above. 



6. Larva of same, from above. 



7. Two intermediate segments, from beneath. 



8. Last segment, from above. 



9. Same, from beneath. 



10. Posterior Respiratory cleft. 



1 1 . Head and Prothorax, from the side. 



12. Prothoracic spiracle, from the inside. 



13. Lateral spiracle of abdomen, in position. 



14. Head, from above. 



15. Antenna. 



16. Terminal joint, and bristle of same. 



1 7. Epistoma from the side, with spiny Labrum. 



18. Mandible. 19. Maxilla. 20. Labium (* the base or insertion). 



21. Black elliptic plate, and root of bristle, in position. 



22. Intestinal Canal, in position. 23. Same, unrolled; including 



Mouth (a), Crop (c), Colon (o), Anal segment (z), Malpighian 

 vessels (m), and their Common duct (n). 



24. Anthomyia riparia. Pupa case, from above. 



25. Same, from the side. 



26. Reticulations of case. 



27. Larva of same, from the side, extended. 



28. Head and Prothorax, from the side. 



29. Posterior end, from above. 



30. Same, from beneath. 



31. Dorsal horn, showing the muricated base, and the position of the 



Spiracle at the tip. 



32. Tip of a Yentral horn, or False leg. 



33. Anal tubercle. 



34. Muricated lateral edge of a posterior ventral incisure. 



