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A new Chinese Trichoptera checklist includes 1267 described species in 116 genera and 30 families, each with a revised provincial distribution. Over the past 8 years, we have added 267 newly described species (or newly recorded species) to the trichopteran fauna of China from the old checklist of 1000 species in 110 genera and 28 families (Yang et al. 2005), among which nearly 80 new species to the Chinese fauna were contributed by various foreign taxonomists. This checklist also reports six newly recorded species from China: Diplectrona obscura Ulmer, Diplectrona aurovittata (Ulmer), Hydropsyche boreas Malicky & Chantaramongkol, and Macrostemum hestia Malicky & Chantaramongkol of family Hydropsychidae; Adicella paludicola Ito & Kuhara of family Leptoceridae and Lannapsyche chantaramongkolae Malicky of family Odontoceridae. Psychomyia dactylina Sun 1997 is a synonym of Psychomyia martynovi Hwang 1957 and Chimarra bicuspidalis Sun 1998 is a synonym of Chimarra sadayu Malicky 1993. The species name of Cheumatopsyche pallida (Navás 1932) is a secondary junior homonym in the genus Cheumatopsyche, preoccupied by Cheumatopsyche pallida (Banks 1920). The new name for Ch. pallida will be published by Chang-hai Sun in a separate paper. Ecnomus orientalis Li & Morse 1997 is a junior primary homonym of E. danielae orientalis Gibon 1992 and is renamed E. anhuiensis, nomen novum. Apatania mirabilis Martynov 1909 is transferred to Apatidelia as Apatidelia mirabilis (Martynov 1909), new combination.

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[1] To investigate temporal and spatial variations in diffusive CH 4 emission from the surface of the Three Gorges Reservoir, CH 4 emissions were measured using the static chamber technique along the mainstream of the reservoir from January to December 2010. The overall average CH 4 flux is 7.93 mg CH 4 m À2 d À1 , which is comparable to those from other temperate reservoirs but significantly lower than those from tropical reservoirs. Seasonal variations showed that CH 4 emission reached the maximum in the summer and turned to the low levels in the other seasons; such variations reflected the seasonal dynamics of temperature, dissolved oxygen, and water velocity. Moreover, the yearly average CH 4 flux decreased from upstream to downstream before the Three Gorges Dam, but CH 4 emission from the surface of the downstream river was higher than that from the surface at Zigui, the upstream water before the Three Gorges Dam. The differences in water velocity and allochthonous input of organic matter probably caused the spatial variations in CH 4 emission. These results indicate that systematic sampling is needed to better estimate CH 4 emission through coverage of the temporal and spatial scales and to better assess the influence of CH 4 emission from the Three Gorges Reservoir on climate change in China, as well as the rest of the world.

[1] Methane (CH 4 ) emissions from the drawdown area of the Three Gorges Reservoir (TGR) have not been thoroughly investigated even though the drawdown area encompasses one third of the reservoir surface. In this study, CH 4 emissions from different land uses were measured in the TGR drawdown area. The average diffusive CH 4 emissions were 2.61, 0.19, 0.18, and 0.12 mg CH 4 m À2 h À1 in rice paddies, fallow lands, deforested lands, and croplands, respectively, and were positively related to the duration of the inundated season among the latter three land uses. On average the drawdown areas studied here (except rice paddies) were sources in the inundated season (0.22 AE 0.26 mg CH 4 m À2 h À1) and a sink in the drained season (À0.008 AE 0.035 mg CH 4 m À2 h À1). The water level was the dominant factor that controlled whether the drawdown area was either inundated or drained, which in turn determined whether the drawdown area was a source or sink of CH 4 emissions. The average diffusive CH 4 emissions from the fallow lands, croplands, and deforested lands increased as the distance from the dam increased from Zigui (0. ), which could reflect different sediment characteristics and water velocities. The total CH 4 emission from the drawdown area was estimated to range from 1033.5 to 1333.9 Mg CH 4 yr À1 , which would account for 42-54% of the total CH 4 emissions from the water surface of TGR.