A key to species of Nomada ruficornis species-group (Hymenoptera: Apidae) of South Korea, with descriptions of three new species Author Lim, Kayun Utah State University, Department of Biology, 5305 Old Main Hill, Logan, UT 84322 - 5305, USA. & Insect Biosystematics Laboratory, Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151 - 921, Republic of Korea. Author Lee, Seunghwan Insect Biosystematics Laboratory, Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151 - 921, Republic of Korea. & Department of Agricultural Biotechnology, Seoul National University, Seoul 151 - 921, Republic of Korea. text Zootaxa 2023 2023-01-11 5228 1 44 60 journal article 224104 10.11646/zootaxa.5228.1.2 e38cfea8-7b9a-47d5-ad4c-9e6fc5fc8d4e 1175-5326 7523971 794F4EC7-DE46-42B5-9C7E-0F164FB51C98 Nomada fusca Schwarz, 1986 Figure 9 . Nomada fusca Schwarz 1986: 434 ; Mitai & Tadauchi 2007 ; 75–77; Smit 2018: 157 . Diagnosis. Body length 7.79 mm in female, 9–10 mm in male ( Smit, 2018 ). Recognized by the following morphological characters: body mainly black, clypeus tinged with black and jagged dark red, distinct hair band at 5 th tergum, HTS usually 4 to 6 in number, rarely only one seta presents in female as in Fig. 9H ; HTS 4 to 5 in number, long and thin in male ( Smit, 2018 ). FIGURE 9. Nomada fusca Schwarz, 1986 . A, Habitus in dorsal view; B, Head in frontal view; C, Antennae; D, Labrum and Mandible; E, Scutellum; F, Propodeal triangle; G, Right HTS; H, left HTS (Scale bar 2mm for A, 0.5mm for B–G). Distribution. Estonia , Europe, Japan , South Korea (new record), Russia . Floral information. Cosmos sulphureus Cav. (Asteraceae) (new record). Hosts. Unknown. Specimen examined. [ SNU ] 1f#, South Korea , GW, Sokcho-si , Baramkkonmaeul-gil , vii. 2020 , coll. Kayun Lim.