Key to the Homidia species of the Korean Peninsula This key is based on Kang and Park (2014). 1 Head colour in totally black............................................................................. 2 - Head colour in pale yellow or black patch.................................................................. 6 2 Thorax with triangle patch.......................................................... H. nigra Lee & Lee, 1981 - Thorax without triangle patch........................................................................... 3 3 Labial margin with papillae; chaetal formula of labial basis as MReL 1 L 2 .......................................... 4 - Labial margin without papillae; Labial basis with ciliate M 2 chaeta.............................................. 5 4 Abd. III with mac a2............................................................. H. speciosa Szeptycki, 1973 - Abd. III without mac a2.......................................................... H. hjesanica Szeptycki, 1973 5 Chaetal formula of labial basis as M 1 M 2 ReL 1 L 2...................................... H. nigrochephala Uchida, 1943 - Chaetal formula of labial basis as M 1 M 2 R 1 R 2 eL 1 L 2 .................................... H. flavonigra Szeptycki, 1973 6 Abd. IV with two distinct transverse bands................................................................. 7 - Abd. IV without two distinct transverse bands.............................................................. 10 7 Chaetal formula of labial basis as MREL 1 L 2, all mac ciliated................................ H. sauteri (Börner, 1909) - Chaetal formula of labial basis as MReL 1 L 2, mac e smooth.................................................... 8 8 Abd. III with mac a2................................................................................... 9 - Abd. III without mac a2................................................ H. pseudoformosana Kang & Park, 2012 9 Abd. IV posterior mac 4+4....................................................... H. mediaseta Lee & Lee, 1981 - Abd. IV posterior mac 6–7+6–7...................................................... H. similis Szeptycki, 1973 10 Abd. IV with only posterior transversal dark bands.......................................................... 11 - Abd. IV without posterior transversal dark bands or another black patterns....................................... 15 11 Abd. III with mac a1; Abd. IV posterior mac 2+2................................... H. heugsanica Lee & Park, 1984 - Abd. III without mac a1............................................................................... 12 12 Thorax with dark patterns Labial margin with papillae....................................................... 13 - Thorax without dark patterns Labial margin without papillae.................................................. 14 13 Abd. III with mac a2............................................................... H. pseudokoreana sp. nov. - Abd. III without mac a2................................................................ H. munda Yosii, 1956 14 Labial margin with papillae................................................... H. phjongjangica Szeptycki, 1973 - Labial margin without papillae; Dens with more than 40spins............................ H. koreana Lee & Lee, 1981 15 With longitudinal stripe along the lateral edge on head to trunk................................. H. socia Denis, 1929 - Without longitudinal stripe along the lateral edge on head to trunk.............................................. 16 16 Labial margin with papillae; macrochaetal formula of coxae 3/4+1, 3/4+3................... H. minuta Kim & Lee, 1995 - Labial margin without papillae.......................................................................... 17 17 Ground colour gray, body without colour pattern........................................ H. grisea Lee & Lee, 1981 - Ground colour yellow, body with colour pattern...................................... H. chosonica Szeptycki, 1973

Published as part of Lee, Inae & Park, Kyung-Hwa, 2024, A new species of Homidia (Collembola: Entomobridae) from Korea, with notes on its DNA data, pp. 262-272 in Zootaxa 5463 (2) on page 270, DOI: 10.11646/zootaxa.5463.2.6, http://zenodo.org/record/11611023