THE NYMPHS 



leaf is fastened to the twig with silk so that it can 

 not fall during the winter. Mr. Scudder states 

 that so far as is known to him all of the species 

 of the sovereigns hibernate as larva; in nests of 

 this kind. It is worthy of note that only the 

 autumn brood of caterpillars make these nests. 

 So that the nest-building instinct appears only in 

 alternate generations, or even less frequently 

 when the species is more than two-brooded. B. 

 archippus is found over nearly the whole of the 

 United States as far west as the Sierra Nevada 

 Mountains, and has been found sparingly even to 

 the Pacific coast near our northern boundaries. 



As Anosia plexippus has been termed the mon- 

 arch, this species is aptly called the viceroy. 



The Vice-reine 

 Basilarchia ploridensis (Bas-i-lar'chi-a flor-i-den'sis) 

 Plate XXVIII, Fig. 4 

 This species closely resembles the viceroy, B. archippus, 

 except that it is of a much darker color. It is found in 

 Georgia and Florida, and is supposed to mimic the queen, 

 Anosia berenice, hence the popular name suggested above. 



THE EMPERORS 



The butterflies of this group are found chiefly in the south- 

 ern part of our country. The three most common species 

 can be separated as follows : 



173 



