Abstract
The Chinese species of the subgenera Euorthocladius Thienemann and Orthocladius s. str. are reviewed. Two new species of Orthocladius (Euorthocladius): O. (E.) angustus and O. (E.) flectus are described, and four species of Orthocladius s. str. are redescribed and illustrated as adult males. A key to males of the two subgenera from China is presented.
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