1. Stenus (Hypostenus) primivenatus Zhao & Zhou, sp. nov.

Type Material. Holotype: male, CHINA, Hainan, Jianfengling (180°52′E, 18°48′N), 20.VII. 2004, 650 m, Jie Wu and Yong-jie Chen collected. [Deposited in Institute of Zoology, Chinese Academy of Sciences (IZ-CAS)]

Diagnosis. This new species belongs to the cicindeloides group. It can be easily distinguished from S. (H.) cicindeloides (Schaller) and S. (H.) yiae Zhao & Zhou sp. nov. by spots on elytra. It is similar to S. (H.) verticalis Benick, but can be distinguished from the narrow apical part of median lobe and small body. Although the median hooks of S. (H.) primivenatus Zhao & Zhou sp. nov. is not distinct sclerotized like other species of the cicindeloides group, the median hooks are still connected by slightly sclerotized part. Maybe this new species is primitive in this species group. Detailed description and illustrations of the species are provided by Zhao & Zhou (2008).