Explanation of Plate XIX. 



Fig. 14. Amauris whytei. Section of wing patch. ( x 200.) 



15. ,, ,, Transverse section of one of the 



" yellow " hairs. ( x 350.) 



16. ,, ,, Dittoofoneof the granulated hairs break- 



ing up to form dust. ( x 350.) 



17. Paralitica eryx. Section of wing patch, (x 260.) 



18. ,, ,, Longitudinal surface view of part of one 



of the brush hairs. ( x 700.) 



19. Tirumala petiverana. Section of part of wing pocket show- 



ing scent scales and double layer 

 of cells. (X 150.) 



20. „ limniace. Section of alar scent organ, made from 



a dried pupa, showing remains of 

 filaments which form the dust. 

 (x75.) 



21. ,, petiverana. Longitudinal surface view of part of 



a brush hair. ( x 450.) 



22. ,, limniace. Fragments of the dust filaments. 



( X 750.) 



23. ,, petiverana. Transverse section of a brush hair. 



(X 850.) 



24. Danaida chrysippus. Two cells from lining of alar scent 



pocket. (X 120.) 



25. ,, „ Section of unexpanded wing showing 



folds of chitin, scale-forming cells, 

 etc. (X 120.) 



26. „ „ Section of brush hair. ( x 850.) 



27. ,, ,, Longitudinal surface view of part of 



same. ( x 850.) 



