A new species, Pseudagrion yalomi, of the Pseudagrion red-group from New Britain, Papua New Guinea (Zygoptera: Coenagrionidae)

A new species of Pseudagrion red-group, Pseudagrion yalomi sp. n., is described from northeastern New Britain, Papua New Guinea. Characters of the male holotype (Papua New Guinea, Bismarck Archipelago, northeastern New Britain Island, Yalom 1000 m, 9.v.1962, Noona Dan Exp. 61–62) are described, and affinities of the new species are discussed. Variations in paratypes and comparisons to other species within the Eastern redgroup are specified. The distribution of all 15 members of the Pseudagrion red-group occurring east of Lydekker’s line is shown on a map.