IN COLORING AND STRUCTURE. 



195 



hind wings is folded over in a similar though 

 looser manner, but is so much larger that when 

 opened it often exposes a white downy surface 

 as large as the abdomen. 



Again, there is much variety of male adornment 

 in special modifications of hairs or scales upon the 

 wings ; the patch of the hair- 

 streaks, just mentioned, is 

 one instance of this ; another 

 example is found among the 

 fritillaries in a row of long 

 fulvous, partially erect hairs 

 along the upper edge of the 

 cell of the hind wings [Fig. 

 162] ; this is accompanied by 

 a curious apparent thicken- 

 ing of the veins in the middle 

 of the fore wing, due alto- 

 gether to the presence of a 

 multitude of small and dense- 

 ly clustered black scales 

 crowded against the veins at 

 this point. A faint oblique patch of minute and 

 crowded lustreless scales, accompanied by long 

 silky hairs, is often seen crossing the wings of some 

 of the satyrs or meadow-browns ; but this feature 

 finds fullest expression in the group of smaller 

 skippers (Astyci), where a large proportion of 

 males have a patch or oblique dash of peculiar 



FIG. 162. Wings of Argymris 

 Cybele, to show the apparent 

 thickening of some of the 

 veins of the fore wing, and the 

 row of hairs near base of hind 

 wing; nat. size. 



