216 DEVELOPMENT OF THE WING-VENATION OF DON ATA. 



Fig. 4. — Austrole^tes cingulatu-^ Burm.,(5. Corresponding venation in 

 imago. 



Fig. 5. — Synhstes weyersi Selys,(J. Tracheation of forewing of nearly full- 

 grown nymph. (Compare Plate xiii,, fig. 2). 



Fig. 6. — Synlesten iveyersi Sely.s,(J, Corresponding venation in imago. 



Fig.7. — Argiolestes griseus Selys,9- Tracheation of forewing of full-grown 

 nymph. (Compare Plate xiii., fig. 3). 



Fig.8. — Argiolestes griseus Selys,9- Corresponding venation in imago. 



Fig. 9. — Neosticta canescens TiWysn-d,^ Tracheation and imaginal vena- 

 tion of forewing of full-grown nymph. (Compare Plate xiii., fig. 4). 



Fig, 10. — Neosticta canescens Tillyard,Q. Corresponding venation in 

 imago. 



Fig. 11. — I soslicta simplex Mai.\-t\n,^. Tracheation of hindwing of nearly 

 full-grown nymph. 



Fig. 12. — Isosficta simplex Martin, 9- Corresponding venation in imago. 



(All figures of nymphal tracheation from microphotographs; x 30. Figures 

 of imaginal venation from oamera-lucida drawings; x 5). 



Plate xiii. (Microphotographs). 



Fig. 1. — Caliagrion billinghursti Martin, 9- Tracheation of hindwing of 

 full-grown nymph. (Compare Plate xii., fig. 1). 



Fig.2. — Synlestes weyersi Selj's,(^. Tracheation of forewing of nearly full- 

 grown nymph. (Compare Plate xii., fig. 5). 



Fig.3. — Argiolestes griseus Selys,9. Tracheation of forewing of full-grown 

 nymph. (Compare Plate xii., fig.7). 



Fig.4. — Neosticta canescens Tillj'ard,^^. Tracheation of forewing of full 

 grown nymph, (Compare Plate xii., fig. 9). 

 (All figures X 50.) 



[Printed ofl, 13th July, 1914.] 



