A. D. Imms 
133 
PLATE X. 
Fig. 22. Figure of the ventral region of the 6th abdominal segment showing its nerve 
ganglion, the fat-body and oenocytes. Longitudinal and horizontal section. 
Fig. 23. Nervous system of a larva about half-grown. 
Fig. 24. Larval and developing imaginal eyes : (a) from a larva 4'25 mm. long ; ( b ) from 
a larva 7 mm. long; (c) do. viewed in section. Figs, a and b are from larvae 
cleared and mounted whole in Canada balsam. 
Fig. 25. Section through left imaginal wing bud : fully grown larva. 
Fig. 26. A pair of the larger oenocytes : 5th abdominal segment. 
Fig. 27. Group of the smaller oenocytes. 
Fig. 28. Section through ventral integument and imaginal buds of gonapophyses. 
Fig. 29. Longitudinal section through the walls of the heart : 8th abdominal segment. 
Fig. 30. Portion of the heart showing striated fibres : 8th abdominal segment. 
Fig. 31. Longitudinal and vertical section through labial plate and imaginal labial bud 
(left rudiment). 
Fig. 32. Longitudinal and horizontal section through the sub-oesophageal ganglion. 
Parasitology i 
9 
