62 ENTOMOLOGICAL NEWS [Feb., 'll 



Fig. 3. Small fragment of surface of left caudal trachea! gill, 

 larva No. 3, showing two scales and four articular pits for others. X 



2IO. 



Fig. 4. Scale from same gill as fig. 3. X 210. 

 Fig. 5. Scale from first antennal joint shown in fig. 10. X 210. 

 Fig. 6. First left tibia and tarsus of larva No. 4. X 8.5. 

 Fig. 7. End view, hind end of abdomen of larva No. 2 $, caudal 

 gills removed. X 8.5. 



Fig. 8. Dorsal view, hind end of abdomen of larva No. 2 $ , caudal 

 gills removed. X 8.5. 



Fig. 9. Left caudal gill, ventro-mesial view, combined from draw- 

 ings from larvae Nos. i, 2, 3, to show tracheation. The dotted line in- 

 dicates the boundary between a central, clearer, unsealed area and an 

 opaque, scaled margin. X 5.8. 



Fig. 10. Right antenna, dorsal view, larva No. 3, $ . X 16.5. 

 Fig. ii. Scale from tibia or tarsus of fig. 6. X 210. 

 Fig. 12. Ventral surface of distal end of tarsus. X 8.5. 

 Fig. 13. Dorsal view of branches of left anterior gastric trachea 

 shown in fig. 17. X about 12.5. 



Fig. 14. Right lateral view of metathorax and abdomen of larva 

 No. 4, $ . X 5-5- 



Fig. 15. Ventral view of same. X 5.5. 



Fig. 16. Left mandible, mesial surface, larva No. 2, $ . X 21. The 

 dotted line shows the line of flexure of the internal branch. 



Fig. 17. Left side of stomach to show tracheation, larva No. 3, <5 . 

 X about 12.5. 



Fig. 18. Ninth abdominal segment to show gonapophyses, larva 

 No. 3, $ X 5.5. 



Fig. 19. Left latero-dorsal view of intestine to show tracheal sup- 

 ply, larva No. 3, $ ; Malpighian tubules omitted. X about 12.5. 



Fig. 20. Right gill of fifth abdominal segment, larva No. 3, $ . 

 The gill has been left untouched, the viscera of the segment removed 

 with the exception of the tracheae supplying the gill. To the left of 

 chr a portion of the chitinous ventral wall of the segment is shown, to 

 the right of chr is a portion of the tergite which has been turned out- 

 ward (laterad) to show the structures within the segment. The por- 

 tions of the two main tracheal trunks rdt and rlt have been turned 

 outward to give a clearer view of the branches to the gill. Compare 

 with the fifth abdominal segment in fig. 22. X about 23. 



Fig. 21. Dorsal view of head, larva No. 4, 9. The dotted lines 

 show the outlines of pale marks. X 7.8. 



Fig. 22. Dorsal view of chief thoracic and abdominal viscera, 

 larva No. 3, $ . The body has been opened along the mid-dorsal line. 

 The ganglion has been omitted from second abdominal segment, the 



