DYAR'S RULE AS RELATED TO THE NUMBER OF INSTARS OF THE CORN EAR WORM, HELIOTHIS OBSOLETA (FAB.), COLLECTED IN THE FIELD

Publisher： Entomological Society of America

ISSN： 1938-2901

Source： Annals of the Entomological Society of America, Vol.28, Iss.4, 1935-12, pp. : 445-461

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