284 



AN ECONOMIC ENTOMOLOGY. 



the primaries only a little banded with narrow lines, the wings 

 reddish on the interior margin, with a narrow band of the same 



color outwardly. On the 

 Fig. 312. middle of the hind wing is a 



large, round, blue spot, with 

 a broad black border and 

 a central white dash. In 

 the female the primaries are 

 purple-brown, the transverse 

 lines gray and much more 

 prominent, and there is a 

 somewhat dusky, pale-mar- 

 gined, nearly kidney-shaped 

 discal spot. The hind wings 

 are essentially like those of 

 the male, and altogether this 

 sex is larger than its com- 

 panion. 



The only other of the silk- 

 spinners to which attention 

 need be called here are the 

 species of Clisiocampa, which are interesting from the fact that 

 most of them live in colonies and spin a tent of silk on the trees 



Fig. 313. 



Larva of io moth. 



Automer'ts io, female. 



attacked by them, whence they are called "tent-caterpillars." 

 Our common species in the East is C. a?nerica7ia, found in apple 



