In synonymy:
Auletta O. Pickard-Cambridge, 1882 = Macrargus Dahl, 1886 (Wunderlich, 1974b: 160)
Aulettobia Strand, 1929 = Macrargus Dahl, 1886 (Wunderlich, 1974b: 160)

type Theridion rufum Wider, 1834; gender masculine

N.B.: considered a synonym of Auletta O. Pickard-Cambridge, 1882b: 258 [urn:lsid:nmbe.ch:spidergen:05427] (type A. excavata O. Pickard-Cambridge, 1882 = Macrargus carpenteri (O. Pickard-Cambridge, 1895)) and of Auletobia Strand, 1929: 14 [urn:lsid:nmbe.ch:spidergen:05428] (replacement name for Auletta, preoccupied in Porifera by Schmidt, 1870) by Wunderlich, 1974b: 160.

Transferred to other genera:
Macrargus alpinus Li & Zhu, 1993 -- see Nippononeta
Macrargus camtschadalicus (Kulczyński, 1885) -- see Perro
Macrargus coreanus Paik, 1991 -- see Nippononeta
Macrargus indistinctus Kulczyński, 1908 -- see Masikia
Macrargus pacificus Berland, 1924 -- see Laminacauda
Macrargus solitarius Dahl, 1928 -- see Erigone
Macrargus strandi (Schenkel, 1934) -- see Scotargus

In synonymy:
Macrargus excavatus (O. Pickard-Cambridge, 1882) = Macrargus carpenteri (O. Pickard-Cambridge, 1895) (Thaler, 1983a: 144).
Macrargus granulosus (L. Koch, 1879, T from Centromerus) = Macrargus multesimus (O. Pickard-Cambridge, 1875) (Holm, 1945b: 44).
Macrargus macrochelis (Emerton, 1917, T from Porrhomma) = Macrargus multesimus (O. Pickard-Cambridge, 1875) (Buckle et al., 2001: 130).
Macrargus mordax (L. Koch, 1879, T from Linyphia) = Macrargus multesimus (O. Pickard-Cambridge, 1875) (Holm, 1945b: 44).
Macrargus rabeleri Schenkel, 1936 = Macrargus carpenteri (O. Pickard-Cambridge, 1895) (Wiehle, 1956: 91, sub M. rufus carpenteri).
Macrargus rufus minutus Holm, 1939 = Macrargus carpenteri (O. Pickard-Cambridge, 1895) (Locket & Millidge, 1953: 363, sub M. rufus carpenteri).

Nomen dubium:
Macrargus australis Berland, 1924b: 428, f. 14-18 (mf, Juan Fernandez Is.) -- Miller, 2007a: 6.

Macrargus boreus Holm, 1968a: 194, f. 17-19 (Dm).
Macrargus boreus Palmgren, 1975: 19, f. 4.5-6 (mf).
Macrargus boreus Gnelitsa & Koponen, 2010: 226, f. 1e-f, 2e-f, 3e-f, 4g-i (mf).

Auletta excavata O. Pickard-Cambridge, 1882b: 258, pl. 13, f. 1 (Df) [urn:lsid:nmbe.ch:spidersp:011486].
Tmeticus carpenteri O. Pickard-Cambridge, 1895b: 108, f. 2 (Dm, not f).
Centromerus carpenteri Reimoser, 1919: 79.
Aulettobia excavata Strand, 1929: 14 (generic replacement name).
Macrargus rabeleri Schenkel, 1936a: 323, f. 6 (Df) [urn:lsid:nmbe.ch:spidersp:011489].
Macrargus rufus minutus Holm, 1939b: 19, f. 9a, c (Dm) [urn:lsid:nmbe.ch:spidersp:011470].
Macrargus rufus carpenteri Locket & Millidge, 1953: 363, f. 217B-D (mf, S of Macrargus rufus minutus).
Macrargus rufus carpenteri Wiehle, 1956: 90, f. 148-151 (mf, S of Macrargus rabeleri).
Macrargus carpenteri Locket, 1964: 275 (elevated to species).
Macrargus carpenteri Miller, 1971: 250, pl. L, f. 15-16 (mf).
Macrargus carpenteri Locket, Millidge & Merrett, 1974: 115, f. 73C (m).
Macrargus excavatus Wunderlich, 1974b: 159 (S of Macrargus carpenteri; see also Thaler, 1983a: 143).
Macrargus carpenteri Palmgren, 1975: 19, f. 4.1-2 (mf).
Macrargus carpenteri Pichka, 1983: 4, f. 5.102 (mf).
Macrargus carpenteri Thaler, 1983a: 143, f. 68 (m) [N.B.: accepted the younger name as the valid one].
Macrargus carpenteri Roberts, 1987: 136, f. 69b, d (mf).
Macrargus carpenteri Tanasevitch, 1990: 86, f. 13.28, 14.13-14 (mf).
Macrargus carpenteri Heimer & Nentwig, 1991: 204, f. 552 (mf).

Erigone multesima O. Pickard-Cambridge, 1875c: 402, pl. 46, f. 9 (Df).
Linyphia mordax L. Koch, 1879c: 13, pl. 1, f. 3 (Dmf) [urn:lsid:nmbe.ch:spidersp:037372].
Erigone granulosa L. Koch, 1879c: 43, pl. 2, f. 1 (Dmf) [urn:lsid:nmbe.ch:spidersp:037371].
Microneta discolor Emerton, 1882: 75, pl. 24, f. 1 (Dmf).
Tmeticus granulosus Simon, 1884a: 420.
Tmeticus granulosus Grese, 1909: 327, pl. 7, f. 5 (m).
Gongylidium macrochelis Emerton, 1917: 263, f. 15 (Dm) [urn:lsid:nmbe.ch:spidersp:012414].
Centromerus granulosus Reimoser, 1919: 80.
Microneta multesima Crosby & Bishop, 1928b: 1049.
Macrargus multesimus Holm, 1945b: 44 (T from Microneta, S of Centromerus granulosus and Linyphia mordax).
Porrhomma macrochelis Chamberlin & Ivie, 1947b: 61 (T from Gongylidium, recorded f).
Macrargus multesimus Kaston, 1948: 133, f. 322-324 (mf).
Macrargus multesimus Kleemola, 1961: 133, f. 9a-b (f).
Macrargus multesimus Hauge, 1969: 3, f. 6-9 (mf).
Macrargus multesimus Palmgren, 1975: 19, f. 4.3-4 (mf).
Macrargus multesimus Pakhorukov & Utochkin, 1977b: 910, f. 19-20 (f).
Macrargus multesimus Pakhorukov, 1981: 79, f. 23-24 (m).
Macrargus multesimus Li, Song & Zhu, 1994: 81, f. 39-40 (f).
Macrargus multesimus Tao, Li & Zhu, 1995: 250, f. 151-154 (f).
Macrargus multesimus Wunderlich, 1995e: 489, f. 40-41 (f).
Macrargus multesimus Song, Zhu & Chen, 1999: 186, f. 104H-I (f).
Macrargus multesimus Buckle et al., 2001: 130 (S of Porrhomma macrochelis).
Macrargus multesimus Paquin & Dupérré, 2003: 142, f. 1571-1573 (mf).
Macrargus multesimus Gnelitsa & Koponen, 2010: 222, f. 1a-b, 2a-b, 3a-b, 4a-c (mf).
Macrargus multesimus Růžička, 2018: 66 (S of Porrhomma macrochelis confirmed).
Macrargus multesimus Zhang, Peng & Zhang, 2022: 66, f. 42A-G (mf).

Theridion rufum Wider, 1834: 218, pl. 15, f. 3 (Dmf).
Theridion parvipalpe Wider, 1834: 221, pl. 15, f. 6 (Dm).
Neriene rubripes Blackwall, 1836: 485 (Dmf).
Micryphantes erythrocephalus C. L. Koch, 1836a: 85, pl. 110, f. 234 (Df; N.B.: not f. 233, there sub M. sylvarum).
Argus parvipalpus Walckenaer, 1841: 349.
Theridion erythrocephalus Walckenaer, 1841: 505.
Micryphantes erythrocephalus C. L. Koch, 1841a: 98, f. 667-668 (f, Dm).
Micryphantes aequalis C. L. Koch, 1841a: 101, f. 669-670 (Dmf).
Erigone erythrocephala Westring, 1861: 271.
Neriene rubripes Blackwall, 1864a: 287, pl. 19, f. 201 (mf).
Bathyphantes pallescens Menge, 1866: 120, pl. 22, f. 45 (mf, misidentified).
Bathyphantes brevipalpus Menge, 1866: 122, pl. 22, f. 47 (f, misidentified).
Micryphantes ruficephalus Ohlert, 1867: 79 (Dmf).
Erigone rufa Thorell, 1871a: 132.
Bathyphantes inermis Lebert, 1877: 160 (D, based on name from legend of Menge, 1866: pl. 22, f. 45).
Neriene rufa O. Pickard-Cambridge, 1879d: 123.
Tmeticus rufus Simon, 1884a: 388, f. 163-166 (mf).
Macrargus rufus Dahl, 1886: 76.
Macrargus rufus Chyzer & Kulczyński, 1894: 78, pl. 3, f. 18 (mf).
Tmeticus rufus Becker, 1896: 62, pl. 8, f. 4 (mf).
Tmeticus rufus Smith, 1901b: 138, p. 76: f. u-v (mf).
Macrargus rufus Bösenberg, 1902: 190, pl. 17, f. 262 (mf).
Macrargus rufus Holm, 1939b: 20, f. 9b (m).
Macrargus rufus Locket & Millidge, 1953: 363, f. 217A, E-F (mf).
Macrargus rufus Wiehle, 1956: 88, f. 144-147 (mf).
Macrargus rufus Merrett, 1963b: 371, f. 27A-F (m).
Macrargus rufus Miller, 1971: 250, pl. L, f. 13-14 (mf).
Macrargus rufus Palmgren, 1975: 17, f. 3.20-24 (mf).
Macrargus rufus Millidge, 1977: 45, f. 177 (m).
Macrargus rufus Pichka, 1983: 5, f. 4 (m).
Macrargus rufus Millidge, 1984b: 248, f. 89 (f).
Macrargus rufus Roberts, 1987: 136, f. 69a, c (mf).
Macrargus rufus Heimer & Nentwig, 1991: 204, f. 551 (mf).
Macrargus rufus Saaristo, in Marusik & Koponen, 2008a: 8, pl. 1 (m).
Macrargus rufus Dupérré, 2013: 7, f. 52 (m).

Macrargus sumyensis Gnelitsa & Koponen, 2010: 224, f. 1c-d, 2c-d, 3c-d, 4d-f (Dmf).