Introductory 



of the University of California, to Dr. Barton W. Evermann, Director 

 of the California Academy of Sciences, whose kind consideration has 

 greatly lightened the labor of the final preparation and printing of 

 this work, and to Dr. E. Bergroth of Turtola, Finland, for most 

 valuable synonymical and bibliographical information. 



Edward P. Van Di'zee. 

 San Francisco, California, 

 October 12, 1917. 



