A taxonomic review of the New Zealand genus Exeirarthra Broun is presented. Six species are documented, and three new species are described and illustrated: Exeirarthra maclennanensis Park & Carlton, sp. nov.; Exeirarthra mccollae Park & Carlton, sp. nov.; and Exeirarthra nunni Park & Carlton, sp. nov. Two species, Exeirarthra angustula Broun and Exeirarthra pallida Broun, are synonymized under Exeirarthra enigma Broun. A key, habitus illustrations, and photos and line drawings of diagnostic characters for all Exeirarthra species are provided.