■L.L1N0IS NATURAL HISTORY SURVEY MANUAL 4 



New York Zoological Society, New York, for figs. 66, 87 



Gordon Pearsall, formerly Forest Preserve District of Cook County, 



River Forest, Illinois, for fig. 62 

 Herbert H. Ross, Illinois State Natural History Survev, L'rbana, 



for fig. 98 

 Walter J. Schoonmaker, New York State Museum, Albany, for fig. 



75 top 

 Charles and Elizabeth Schwartz, Jefferson City, Missouri, for figs. 



42 bottom, 70 

 Charles L. Scott, formerly Illinois State Natural History Survey, 



Urbana, for fig. 89 

 Thomas G. Scott, Illinois State Natural History Survey, Urbana, 



for fig. 13 

 United States Fish and Wildlife Service, Washington, D. C, for 



figs. 37, 71, 97, 104 

 United States Public Health Service, Communicable Disease Cen- 

 ter, Atlanta, Georgia, for figs. 99, 100 bottom 

 University of Illinois, Department of Forestry, Urbana, for fig. 116 

 University of Missouri, Extension Service, Columbia, for fig. 106 

 Ernest P. Walker, Smithsonian Institution, Washington, D. C, for 



figs. 46, 48, 49, 52, 53, 56, 84, 101, 102 

 Wisconsin Alumni Research Foundation, Madison, for fig. 100 top _ 

 Wisconsin State Department of Conservation, Madison, for figs. 



110, 111 



