THE BUTTERFLY AND ITS ALLIES 



to spin the cocoons on prepared twigs or straw. A few 

 days after the cocoon is completed its inhabitant is killed 



FIG. 23. Citheroma rcf/al!x, the Regal moth. Olive and red wings, yellow 

 spots. Nat. size. Photo, hy W. H. C. P. 



in-hot water. The cocoon is made of a continuous thread 

 about three thousand metres long, of which, however, only 



FIG. 21. Larva of Citheronia regalis. Head to left. One-half nat. size. 



Photo, by W. H. C. P. 



about six hundred metres make good silk. This long 

 thread has to be unravelled. The outer end is loosened 



