Notes on some Chinese and Himalayan Cordulegastridae (Insecta: Odonata: Anisoptera)

East Palaearctic Cordulegastridae from the former Lieftinck collection are identified. Two Neallogaster species are described and figured. Neallogaster is supposed to consist of two speciesgroups. Cordulegaster lunifera and C. pekinensis are redescribed and figured. A single female from Central China belongs to C. jinensis. It is assumed that these three Cordulegaster species belong to a separate supraspecific taxon. A single male Cordulegaster from 'Tsingtau" is not conspecific with other cordulegastrids known from China; it resembles the European C. boltonii and will be described as a new species in a revision of the C. boltonii species-group. It is emphasized that the cordulegastrid fauna of the East Palaearctic is still insufficiently known.