Explanation of Plate XX. 



Fig. 28. Danaida chrysippus. Section of part o unexpanded wing 



taken through area which will 

 form scent pocket in the imago. 

 (X 500.) 



29. ,, lotis. Section of part of alar scent pocket show- 



ing scent scales with large cells 

 alternating with small cells and 

 rudimentary scales. ( x 150.) 



30. Trepsichrois mulciber. Section of hair socket from brush 



bag showing gland cells associ- 

 ated with hair. ( x 125.) 



31. ,, ,, Epithelium, funnel socket, and part 



of membranous tube from acces- 

 sory vesicle. ( x 125.) 



32. ,, ,, Transverse section of a brush 



hair. ( x 750.) 



33. ,, „ Longitudinal surface view of part 



of same, (x 750.) 

 34a. ,, ,, Scale from fur patch of hind- wing. 



(X 75.) 

 346. ,, ,, Scale from discoidal cell patch of 



ditto. ( x 75.) 



35. ,, brookei. Part of a bi'ush hair showing projec- 



tions. ( X 500.) 



36. Hestia lynceus. Gland cells of one of the hairs of large 



brush, (x 125.) 



37. ,, ,, Surface view of part of a hair from large 



brush. ( X 500.) 



38. ,, „ Section of a hair near middle of its length. 



( X 500.) 



39. „ „ Ditto near distal end. ( x 500.) 



