2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. u4 



Harvard, the Academy of Natural Sciences of Philadelphia, and 

 Purdue University at Lafayette, Ind. Through the assistance of 

 the American Philosophical Society, longer field trips were made by 

 Ilowden to Texas in 1954 and Arizona in 1956, and by Cartwright to 

 Arizona in 1956. We are grateful for this support. 



We also acknowledge our indebtedness and extend our thanks to 

 numerous institutions and individuals for the generous loan of speci- 

 mens. The letters in parentheses in the following list of collections 

 studied are abbreviations used in the text when citing material; the 

 name of the curator responsible for the loan of the specimens follows 

 the abbreviation: Academy of Natural Sciences of Philadelphia 

 (ansp), J. A. G. Rehn; American Museum of Natural History (amnh"), 

 Mont A. Cazier; California Academy of Sciences (cas), H. B. Leech ; 

 Canadian National Collection (cnc), W. J. Brown; Carnegie Aluseum, 

 G. E. Wallace; Chicago Natural Historj^ Museum (cnhm), Henry S. 

 Dj^bas; Cornell University (cu), Henry Dietrich; Illinois Natm-al 

 History Survey (inhs), M. W. Sanderson; Iowa State College (is), 

 J. L. Laffoon; Aluseum of Comparative Zoology (mcz), P. J, Darling- 

 ton; Ohio State University (osu), J. N. Knull; Oregon State College 

 (osc), P. O. Pitcher; San Jose State College, J. Gordon Edwards; 

 United States National Museum (usnm); University of Arizona (ua), 

 Floyd Werner; University of Cahfornia, Davis (ucd), A. T. McClay; 

 University of Kansas (uka), R. H. Beamer; University of Michigan 

 (uMich.), T, H. Hubbell; University of Nebraska, W. T. Atyeo; Uni- 

 versity of Texas (urex), H. J. Reinhard; University of Tennessee 

 (ut) ; and Utah State Agricultural CoUege, G. F. Knowlton. 



Individuals who kindly loaned material for study from their per- 

 sonal collections included: B. Benesh, (bb), L. J. Bottimer (ljb), 

 B. K. Dozier, D. K. Duncan, R. J. Frederick (rjf), C. A. Frost, 

 B. Malkin, G. H. Nelson, F. H. Parker, Mark Robinson, W. Rosen- 

 berg (wr), G. B. Vogt, R. E. Woodruff (rew), and F. N. Young 

 (fny). 



We are especially indebted to E. B. Britton of the British Museum 

 (Natural History) who loaned type material from the Biologia Cen- 

 trali-Americana specimens, to H. Freude of the Sammlung des Bayer- 

 ischen Staats in Munich for the loan of specimens from the Harold 

 and Sturm collections, to K. Delkeskamp of the Zoologische Museum 

 der Humbolt-Universitat in Berlin for the loan of Harold specimens, 

 and to A. Villiers of the Museum National d'Histoire Naturelle in 

 Paris for comparing specimens with type material from the Harold 

 and Laporte collections. 



Mrs. Anne Howden aided the project in many waj^s, both in the 

 field and in the typing of the manuscript. Photographs were taken 

 by Jack Scott of the Smithsonian staff. 



