Abstract
In this paper, we described an example of gynandromorphy in a katydid, Ducetia japonica. Its color is brown, while normal individuals are green. Its left maxilla is smaller, and left maxillary palpus is shorter. Left forewing as male is shorter than right one as female. Hindwing is also shorter in left. Cercus, epiproct and subgenital plate are left in male and right in female.
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