In synonymy:
Arctilaira Chamberlin, 1921 = Hilaira Simon, 1884 (Holm, 1960b: 119)
Soudinus Crosby & Bishop, 1936 = Hilaira Simon, 1884 (Marusik et al., 1993a: 68)
Utopiellum Strand, 1901 = Hilaira Simon, 1884 (Holm, 1945b: 28)
Transferred to other genera:
Hilaira algida Hackman, 1954 -- see Sougambus
Hilaira alpina Eskov, 1987 -- see Oreoneta
Hilaira balia Crosby & Bishop, 1929 -- see Neomaso
Hilaira carli Lessert, 1907 -- see Sciastes
Hilaira corneliae (Chamberlin & Ivie, 1944) -- see Disembolus
Hilaira dubia Hackman, 1954 -- see Sciastes
Hilaira frigida (Thorell, 1872) -- see Oreoneta
Hilaira frigida brunnea (Emerton, 1882) -- see Oreoneta
Hilaira frigida intercepta (O. Pickard-Cambridge, 1873) -- see Oreoneta
Hilaira holmi Eskov, 1981 -- see Drepanotylus
Hilaira leviceps (L. Koch, 1879) -- see Oreoneta
Hilaira mentasta (Chamberlin & Ivie, 1947) -- see Sciastes
Hilaira modesta (Thorell, 1872) -- see Oreoneta
Hilaira mongolica Wunderlich, 1995 -- see Oreoneta
Hilaira montigena (L. Koch, 1872) -- see Oreoneta
Hilaira montigena arctica Holm, 1960 -- see Oreoneta
Hilaira plagiata Tullgren, 1901 -- see Laminacauda
Hilaira punctata Tullgren, 1955 -- see Oreoneta
Hilaira sinuosa Tullgren, 1955 -- see Oreoneta
Hilaira tatrica Kulczyński, 1915 -- see Oreoneta
Hilaira tatrica garrina Chamberlin, 1949 -- see Oreoneta
Hilaira uncata (O. Pickard-Cambridge, 1873) -- see Drepanotylus
In synonymy:
Hilaira aquilonia (Hackman, 1954, T from Sciastes) = Hilaira canaliculata Emerton, 1915 (Aitchison-Benell & Dondale, 1990: 224, sub Soudinus)
Hilaira bellans (Chamberlin, 1921, T from Arctilaira) = Hilaira vexatrix O. Pickard-Cambridge, 1877 (Holm, 1960b: 119)
Hilaira glacialis thienemanni Schenkel, 1939 = Hilaira pervicax Hull, 1908 (Holm, 1945b: 29)
Hilaira mirabilis (L. Koch, 1879, removed from S of H. consimilis (O. Pickard-Cambridge, 1875) = Hilaira herniosa Thorell, 1875 (Holm, 1945b: 28)
Hilaira monedula Saito, 1986 = Hilaira herniosa Thorell, 1875 (Eskov, 1987a: 1030)
Hilaira ruderalis (Sørensen, 1898, T from Araeoncus) = Hilaira vexatrix O. Pickard-Cambridge, 1877 (Holm, 1956: 464, contra Brændegaard, 1946: 39)
Hilaira ryabukhini Eskov & Marusik, 1991 = Hilaira canaliculata Emerton, 1915 (Marusik et al., 1993a: 68)
Hilaira zaicewi Kulczyński, 1916 = Hilaira proletaria L. Koch, 1879 (Holm, 1973: 85)
Nomen dubium:
Hilaira consimilis (O. Pickard-Cambridge, 1875b: 192, pl. 27, f. 2, m, Europe, originally in Erigone) -- Holm, 1945b: 28