Sept., 1908.] Wright : List of Diurnal Lepidopteka. 153 



ANNOTATED LIST OF THE DIURNAL LEPIDOP- 

 TERA OF SAN DIEGO COUNTY, CALIFOR- 

 NIA, BASED ON COLLECTIONS 

 DURING 1906 AND 1907. 



By W. S. Wright, 

 San Diego, California. 



In the following paper I attempt to give a list of the known 

 butterflies of San Diego County with notes on my personal observa- 

 tions. A complete list would be impossible under the circumstances, 

 and this is offered as a nucleus for a fuller, more complete one to be 

 prepared at some future time as further explorations and collections 

 shall add to our knowledge. 



Since the territory covered by my collections lies wholly within 

 the lower austral life zone a discussion of life areas is not attempted. 



In the spring of 1906, Mr. George Field and myself began a sys- 

 tematic collection of material for this paper. At first our efforts were 

 confined to the immediate vicinity of San Diego city. A large amount 

 of material was collected and mounted. A casual study showed that 

 the region is full of interest to the student and that there are many 

 species not previously credited to this locality. This fact led us at 

 once to extend our territory to include the whole county as nearly as 

 possible. Being unable to visit every portion of the county during 

 the best collecting seasons, we were very fortunate in having the con- 

 siderable collections of Mr. and Mrs. Frank Stephens for reference and 

 comparison. This material has been collected at various times 

 during the last fifteen years and much of it came from localities that 

 our limited time made it impossible for us to visit. 



In July, 1906, we collected over a strip of territory approximately 

 twenty miles wide along the Mexican border from the ocean to the 

 edge of the desert. On this trip we took some twenty-five hundred 

 specimens among which we found one new species since described by 

 Dr. Henry Skinner as Thecla loki. 



In 1907 Mr. Field went over the same ground and then made a 

 detour to the north, visiting the mountains about the Cuyamaca. 

 Many interesting "finds" were recorded, among them Thecla ines, 



