14 EVOLUTION IN COLOR-PATTERN OF THE LADY-BEETLES. 



ACKNOWLEDGMENTS. 



Before proceeding with the detailed discussion of the species, I wish to 

 express my gratitude to the owners or custodians of the following collec- 

 tions for the privilege of examining their beetles in these genera and in 

 some cases for the loan of material: United States National Museum; 

 Philadelphia Academy of Natural Sciences; American Museum of Natural 

 History; Brooklyn Institute of Arts and Sciences; Museum of Compara- 

 tive Zoology, Cambridge, Massachusetts; Boston Society of Natural His- 

 tory; Carnegie Museum of Pittsburg; University of Ohio; University of 

 Missouri; University of Nevada (Prof, Peter Frandsen) ; F. Blanchard, 

 Tyngsboro, Massachusetts; F. W. Bowditch, Brookline, Massachusetts; 

 T. L. Casey, Washington, District of Columbia; W. T. Davis, New York; 

 Charles Fuchs, Berkeley, California; L. H. Joutel, New York; C. W. Leng, 

 New York; F. E. Lutz, Cold Spring Harbor, New York; W. S. Marshall. 

 Madison, Wisconsin; F. W. Nunenmacher, Goldfield, Nevada; Carl Schaef- 

 fer, Brooklyn, New York; E. C. Van Dyke, San Francisco, California. 

 I am further indebted to many friends who have sent me beetles from 

 various localities. To the Director of the Station, Dr. Charles B. Daven- 

 port, my gratitude is due for my interest in evolutionary problems and for 

 aid and encouragement in undertaking this one. I would also thank Dr. 

 Schwarz, of the United States National Museum, for help with the Ger- 

 man citations, and Prof. W. L. Tower for suggestions upon the structure 

 of the elytra. 



Except where otherwise stated, it is the intention of the author to 

 deposit the types in the United States National Museum. 



