INTRODUCTION. 



IN the course of a sporting-expedition through 

 California and Oregon, extending from the middle of 

 May 1871 to the end of June 1872, I devoted much 

 time to collecting Lepidoptera. 



With the exception of about four months spent in 

 winter-quarters, in a log hut on the site of old Camp 

 Watson, about sixty miles from Canyon City, all my 

 time was passed in open camp, which gave me excep- 

 tional opportunities of collecting at all hours ; and as 

 my outfit was purposely adapted to the requirements 

 of a vagrant entomologist, as well as to those of a 

 sportsman, I was able, with the help of my energetic 



