SEXUAL COLORATION. 



genus Psyche, the dull colours of the male insect are still more 

 marked ; the Vapourer is a rich brown, with a white spot in 

 the centre of each fore-wing, but the colour of Psijchc is a dull 

 greyish brown ; in Psi/c/ir (fig. 2S), the female is still more 



Fig. 34.— Male and Female of WiQter .Moth. 



degenerate. Figs. ;U, 35, represent the males and the wing- 

 less females of two Geometers ; it can hardly be said that 

 these two moths are conspicuously inferior in their coloration 

 to some of their immediate allies which have a winged female.. 



Male and Wingless FemiUe of Winter Moth. 



The antennas of the female Yapourer moth are thread-like, and 

 not "pectinated," as in the male; they are doubtless, therefore, 

 as Mr. Poulton remarks, less efficient as sense organs ; but 

 it must be noted that we have no evidence that the eves are a± 



