Some years ago, becoming interested in certain problems connected with the life history of Dione vanillce, I skimmed the scanty literature available, made some observations, and took some fragmentary notes. Having abandoned the study, and being at present occupied with other matters, I am placing this material in the hands of Dr. O. P. Dellinger, to whom I owe my interest in the subject, thinking that perhaps the investigation may sometime be continued by some of his students. As most of the data was collected near Pittsburg, Kan., all spatial references are to this locality unless some other is specifically indicated.
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Vance Randolph (1919) studied this question.