EXPLANATION OF PLATES. 



Note.- -Except where otherwise indicated, practically all the 

 drawings in the following plates are from the pen of Mr. 

 Herbert J. Powell, of Redlands, California. I he wash 

 drawings and certain others designated are by Mr. Robert 

 N. Wenzel of .Stanford University. The photogra^jhs are 

 by 3.1r. E. F. Everitt, of Redlands, California. They have 

 not been retouched except as to the backgrounds. 



