2 U.S. NATIONAL MUSEUM BULLETIN 255 



essential to this project. The abbreviations enclosed in parentheses 

 represent the deposition of specimens as cited in this publication: 

 Dr. A. F. Braun, Cincinnati, Ohio (AFB); Mr. H. K. Clench, Car- 

 negie Museum (CM) ; Dr. H. B. Cunningham, Illinois Natural History 

 Survey (INHS) ; Drs. P. J. Darlington, Jr. and H. E. Evans, Museum 

 of Comparative Zoology (MCZ); Dr. J. R. Eyer, New Mexico State 

 University (JRE); Dr. J. G. Franclemont, Cornell University (CU); 

 Dr. T. N. Freeman, Canadian National Collections (CNC); Dr. H. J. 

 Grant, Jr., Academy of Natural Sciences, Philadelphia (ANSP); 

 Dr. R. W. Hodges, U.S. Department of Agriculture (RWH); Mr. 

 C. P. Kimball, Barnstable, Massachusetts (CPK); Dr. A. B. Klots, 

 New York, New York (ABK) ; Mr. L. M. Martin, Los Angeles County 

 Museum (LACM) ; Mr. Bryant Mather, Jackson, Mississippi (BrM) 

 Dr. J. A. Powell, University of California at Berkeley (UCB) 

 Dr. F. H. Rindge, American Museum of Natural History (AMNH) 

 Dr. L. Vasquez G., Instituto de Biologia, Universidad Nacional 

 Aut6noma de Mexico (IB) ; Dr. F. G. Werner, University of Arizona 

 (UA); and Mr. A. K. Wyatt, Chicago Natural History Museum 

 (CNHM). Specimens deposited in the United States National 

 Museum are designated by USNM. I would like to give special 

 thanks to my colleagues at the Smithsonian Institution for their 

 many helpful suggestions; also to Dr. H. B. D. KettleweU, Oxford 

 University, Oxford, England, for his remarks concerning Tegeticula 

 maculata extranea; and to Dr. H. S. Gentry of the U.S. Department 

 of Agriculture, BeltsviUe, Maryland, for his comments on certain 

 information in relation to Yucca and Agave. In addition, I am grate- 

 ful to the American Philosophical Society for supporting my studies 

 on these insects in Mexico during the summer of 1963 with the assist- 

 ance of a grant from the Johnson Fund. 



Nearly aU of the photographic work was performed by Mr. Jack 

 Scott, staff photogi-apher of the Smithsonian Institution. All habitat 

 photographs of plant hosts, flowers, fruits, etc., were by the author, 

 except where otherwise noted, and were reproduced from kodochrome 

 sUdes by Mr. Scott. I am indebted to Dr. Powell for the illustrations 

 of Yucca whipplei and Y. brevifolia, and to Dr. Alvah Peterson for the 

 photographs of the eggs of Parategeticula pollenifera. AU drawings 

 were executed by the author with the exception of figure 33, which was 

 drawn by Mr. Andre Pizzini, staff artist for the Department of 

 Entomology, Smithsonian Institution. The outline maps of the 

 United States and North America are from the Goode Base Map 

 Series and are used mth the permission of the Department of Geog- 

 raphy, University of Chicago (copyright by the University of 

 Chicago). The contour maps of the State of CaUfornia are used 

 through the courtesy of the CaUfornia Insect Survey. 



