6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Because of the large number of records involved, distributional 

 data have been reduced to Usting states and counties (or locales and 

 provinces) with the earliest and latest months of collections for each 

 species. Only complete collecting data are given for the new species 

 and the two subspecies. 



M. C. Lane, Collaborator, Agricultural Research Service, USDA, 

 has given invaluable assistance to this study. He permitted us to 

 study specimens in his collection, allowed the use of his notes of 

 type specimens, loaned numerous identified specimens, and identified 

 many of the species in the early stages of this work. 



Grants from the National Academy of Sciences (Marsh Fund Grant 

 no. 130, 1960) and the American Philosophical Society (Grant 2614, 

 Penrose Fund, 1960) permitted the senior author to study types in the 

 Zoologisches Museiun der Humboldt-Universitat zu Berlin and the 

 British Museum (Natm'al History). Another grant by the National 

 Academy of Sciences (Marsh Fund) enabled the junior author to 

 study Melanotus types at Purdue University and the Museum of 

 Comparative Zoology, Harvard University. While a member of the 

 faculty, the senior author was provided funds by the University of 

 Nebraska Research Council to study the Lane Collection in Walla 

 Walla, Wash. 



Through the kindness of Prof. C. H. Lindroth and K. J. Hedquist, 

 we were able to receive specimens of M. communis from the Gyllenhal 

 Collection at the Swedish Museum of Natm'al History, Stockholm. 

 WhUe studying type specimens at various times, we enjoyed the help 

 and hospitality of Dr. K. Delkeskamp, Humboldt-Universitat, Miss 

 C. M. F. von Hayek, British University; Dr. P. J. Darlington, Jr., 

 Museum of Comparative Zoology; and Dr. Leland Chandler, Purdue 

 University. 



The large collections of the U.S. National Museum have been vital 

 to our studies. We are indebted to the officials of the Smithsonian 

 Institution and T. J. Spilman, USDA, for the privilege of studying 

 the material. 



We also thank the following for the loan of specimens: F. G. Werner, 

 University of Aiizona; H. B. Leech, California Academy of Sciences; 

 P. D. Hurd, Jr., California Insect Survey; E. C. Becker, Canadian 

 National Collection; H. Dietrich, Cornell University; H. O. Lund, 

 University of Georgia; M. W. Sanderson and L. K. Gloyd, Illinois 

 State Natural History Smwey; G. W. Byers, University of Kansas; 

 W. Enns, University of Missouri; D. A. Young, North Carolina 

 State College; W. C. Stehr, Ohio State University; H. R. Burke, 

 Texas Agricultural Experiment Station; and C. D. Fronk, University 

 of Wyoming. 



