356 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



been almost completely overlooked until now and which was found 

 to be quite valuable, especially in defining generic lunits, is the struc- 

 ture of the male aedeagus. More than 300 specimens were dissected 

 so that these structures might be studied. 



Several institutions housing important collections were visited for 

 the purpose of examining types: the Horn collection in the Academy 

 of Natural Sciences of Philadelphia, the Casey and Linell collec- 

 tions in the U.S. National Museum, and the LeConte, Haldeman, 

 Melsheimer, and Zimmerman collections in the Museum of Compar- 

 ative Zoology, Harvard Univ. 



The following institutions have lent material, in some instances 

 their entire collections of the group, for this study. In parentheses 

 are the abbreviations used for these institutions when they appear in 

 the text, followed by the name of the person or persons to whom I 

 am indebted for making the specimens available: 



Agricultural and Mechanical College of Texas (TAM), H. J. Reinhard 



American Museum of Natural History (AMNH), John C. PalUster 



British Museum (Natural History) (BMNH), J. Balfour-Browne 



California Academy of Sciences (CAS), Hugh B. Leech 



Carnegie Museum (CMP), George Wallace 



Cornell Universitj^ (CU), Henry Dietrich 



Department of Agriculture (Canada), Science Service (CSS), W. J. Brown 



Emory University (EU), Edward F. Menliinick 



Hlinois Natural Histor}' Survey (INHS), Milton W. Sanderson 



Iowa State University (loSt), Jean L. Laffoon 



Kansas State University (KSU), Fred A. Lawson 



Michigan State University (MSU), Roland L. Fischer 



Museum of Comparative Zoology, Harvard University (MCZ), W. L. Brown 

 and Edward A. Chapin 



Ohio State Museum (OS]M), Edward S. Thomas 



Ohio State University (OSU), Josef N. Knull 



Ohio University (OU), William C. Stehr 



Oklahoma State University (0AM), F. A. Fenton 



Oregon State College (OrSt), Frank F. Hasbrouck 



Pennsylvania State University (PenSt), S. W. Frost 



Provincial Museum, British Columbia (PMBC), George A. Hardy 



Purdue University (PU), Leland Chandler 



Royal Ontario Museum of Zoology and Palaeontology (ROMZ), Glenn B. 

 Wiggins 



State Plant Board of Florida (FPB), Howard V. Weems, Jr., and R. E. 

 Woodruff 



South Dakota State College (SDSC), H. C. Severin 



United States National Museum (USNM), T. J. Spilman 



University of Arizona (UAriz), Floyd G. Werner 



University of Arkansas (UArk), Lawrence H. Rolston 



University of California (UCal), Paul D. Hurd, Jr. 



University of Idaho (Ulda), W. F. Barr 



University of Kansas (UKan), George W. Bj-ers 



University of Minnesota (INIinn), Edwan F. Cook 



University of Missouri (UMo), Paul J. Spangler and Wilbur R. Enns 



University of Nebraska (UNeb), W. T. Atyeo 



