Revision of Folsomina Denis (Collembola : Isotomidae) with a description of a new species from Southeast Asia and the Pacific region and comments on ecology

The four described species of the pantropical and Australasian genus Folsom ina, F. yosiii Lawrence, 1969, F, onychiurina ina Denis, 1931, F. yongxinge nsis Chen. 1987 and F. wuyanensis Zhao and Tamura, 1992, are reviewed. Fols omina yosiii Lawrence, 1969, is a junior synonym of F. onychiurina Denis, 1 931, and F. onychiurina Denis sensu Lawrence, 1969, is a different species here named F. lawrencei. A new species, F. infelicia. is described and reco rded from Malaysia, Thailand, Sumatra and Fiji. A key is given to species i n the genus and notes on species distribution and on biology are included. All species appear to be parthenogenetic and show progressive adaptations t owards soil living.