158 SEASONAL CHANGES AND HISTORIES. 



butterflies possess no mean interest, and that we 

 are probably still far from understanding all the 

 complications which arise in the history of a single 

 one of those which are double-brooded or have a 

 wide geographical distribution. If any of my 

 readers have been puzzled by their strangeness, 

 and think that perhaps I have drawn the pic- 

 ture with too free a hand, let me assure them 

 that, for simplicity's sake, I have been forced to 

 keep quite out of view one element of discord by 

 which the complexity is often vastly increased, 

 and to which I shall next invite attention. 



