Excerpt from University of Kansas Publications, Museum of Natural History, 1959-1964, Vol. 12

Except for scattered observations at earlier dates, field Work on this study began in June 1953, and was also carried out in parts of the summers of 1954 and 1957. A total of roughly 60 days in the field was devoted to this project. The laboratory section of the study was started in December of 1952 and was terminated in December 1957.

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