Allopachrianigrocatta sp. nov. from Guangxi, with a key and checklist of Chinese species and additional records of Allopachria Zimmermann, 1924 from China (Coleoptera, Dytiscidae, Hydroporinae, Hyphydrini)

A new species Allopachrianigrocatta sp. nov. from Guangxi, China is described. New records are provided for the following Allopachria species: A.dudgeoni Wewalka, 2000 and A.weinbergeri Wewalka, 2000 from Zhejiang, and A.yiae Bian, Guo & Ji, 2013 from Guizhou. Additional records are also given for some other Chinese species. The habitus and male genitalia of the new species are illustrated. An updated key and a checklist of all Chinese species of Allopachria are provided.