172 THE COLORING OF BUTTERFLIES. 



compound term Walshii-Telamonides, is therefore 

 by no means wholly produced from chrysalids of 

 the final brood of Marcellus, but in large measure 

 from those of all the earlier broods, even includ- 

 ing the earliest Walshii. Ajax, then, is at one 

 and the same time, single, double, triple, quad- 

 ruple, and, if we may trust Mr. Edwards, quin- 

 tuple-brooded a case as yet without a parallel 

 among butterflies. The proportion of chrysalids 

 which go into premature hibernation increases as 

 the season advances ; of those produced from eggs 

 laid in April more than ten per cent continue until 

 spring, from eggs laid in May about thirty-five 

 per cent, from those laid in June from fifty to 

 sixty per cent, and from those laid in July about 

 seventy per cent ; of course those from later eggs 

 all hibernate. Walshii and Telamonides, then, 

 produce Marcellus the same season, or either 

 Walshii or Telamonides the succeeding spring. 

 Marcellus produces itself the same season, or one 

 of the others in the spring ; neither Walshii nor 

 Telamonides is produced the same season by any 

 of the varieties ; nor does Marcellus ever emerge 

 from wintering chrysalids. 



How difficult it has been to trace all these facts 

 will appear from the following brief history of 

 the species. It winters only in the chrysalis 

 state. The earliest variety, Walshii, appears 

 when the peach-trees bloom, about the middle of 



