Abstract
The genus Diplectrona Westwood (Trichoptera: Hydropsychidae) is revised for the Japanese main islands, and four species are recognized, the three species D. aiensis Kobayashi, D. burha Schmid, and D. kibuneana Tsuda, and one new species, D. takaii sp. nov. Diplectrona difficultata (Kobayashi) is synonymized with D. kibuneana. Diplectrona japonica Banks and D. albomarginata Ulmer are transferred to the genus Homoplectra Ross.
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