HOW TO KNOW THE BUTTERFLIES 



tant facts of the lives of our butterflies. It is 

 with the hope of meeting this need that this book 

 has been written. 



It is hoped that the work will be of use to 

 students in all parts of our country ; but in order 

 that it may be of moderate size, the descriptions 

 of species, with few important exceptions, have 

 been restricted to those that occur in the eastern 

 half of the United States. Many of these spe- 

 cies, however, have a much wider distribution, 

 some extending to the Pacific Coast. 



XII 



