Plate 31 



BRIGHT COLOURS WHICH CANNOT BE ATTRIBUTED 

 TO " SEXUAL SELECTION." 



I. Eyed Hawk-moth, under the influence of excitement. 



2. A Butterfly, Zeuxidia horsfieldi, Feld, showing tufts of scent- 

 diffusing scales on the liind-wings. 



I 



[Face page 200. 



