IN COLORING AND STRUCTURE. 



203 



ing the scales can even the tassels of their long and 

 slender blades be seen. Perhaps even more curi- 

 ous than this is the arrangement by which all the 



Fro. 170. Scales of Thymelicus Aetna, X 285 ; a, club-shaped androconium; 

 b, gigantic spindle-shaped androconium ; c, ordinary scale. 



androconia of the swallow-tails and of one large 

 group of skippers are tightly inclosed in the fold 

 of the membrane to which reference was made. It 



