Two new species belonging to the endemic New Guinea genus Pyrrhargiolestes are described from Papua New Guinea: P. lamington sp. nov. (holotype: Mount Lamington, Oro Province, dep. in RMNH) and P. yela sp. nov. (holotype: Rossel Island, Milne Bay Province, dep. in USNM). The presumed male of P. aulicus is described for the first time….
The subfamily Argiolestinae is raised to family level to include all zygopteran genera in which the gills of the larvae are flat and held in a horizontal plane. A diagnosis of the family is given and characters for both adults and larvae are presented. The family is divided into two subfamilies based on characters in…