Lasioglossum (Hemihalictus) ohei Hirashima & Sakagami, 1966 Figs 7, 15D, 17C, 19A, 20D Lasioglossum (Evylaeus) ohei Hirashima & Sakagami in Sakagami et al., 1966: 679 (holotype: ELKU, ♀, type locality =Misano, Kitami City, Kitami Province, Hokkaido). Diagnosis Females are similar to L. (H.) simplicior but separated from them by the head slightly longer than wide or nearly as long as wide (HL/ HW ratio 1.01 ±0.02), IS of mesoscutum nearly smooth on posterior margin, and metasomal terga with silky dull luster. In contrast, in L. (H.) simplicior, the head wider than long (HL/ HW ratio 0.97 ± 0.03), IS of mesoscutum with distinct tessellation over entire surface, and metasomal terga with enamel-like luster as in most species of Lasioglossum. Material examined Paratypes JAPAN – Hokkaido • 1 ♀; Kitami; 18 Jul. 1965; S.F. Sakagami leg.; MNHAH • 16 ♀♀, 7 ♂♂; same location as for preceding; 22 Jul.–14 Aug. 1964; S.F. Sakagami leg.; MNHAH • 3 ♀♀; same location as for preceding; 14 Aug. 1964; S.F. Sakagami leg.; MNNAH • 6 ♀♀, 2 ♂♂; same location as for preceding; 23 Aug. 1959; S.F. Sakagami leg.; MNHAH • 1 ♂; Kitamoshiri, Hokkaido Uryu Experimental Forest; 12 Sep. 1969; S.F. Sakagami and H. Fukuda leg.; MNHAH • 1 ♀, 4 ♂♂; same location as for preceding; 14 Sep. 1969; S.F. Sakagami and H. Fukuda leg.; MNHAH. Other material JAPAN – Hokkaido • 1 ♀; Mt Daisetsu, Aizankei; 30 Jul.–3 Aug. 1955; Y. Hirashima leg.; ELKU • 1 ♀; Asahikawa, Asahiyama; 18 Jun. 1985; T. Inaoka leg.; MNHAH • 1 ♀; Sapporo, Barato; 3 Jun. 1973; M. Matsumoto leg.; MNHAH • 1 ♀; same location as for preceding; 7 Jun. 1973; M. Matsumoto leg.; MNHAH • 1 ♀; same location as for preceding; 14 Jun. 1973; M. Matsumoto leg.; MNHAH • 7 ♀♀; same location as for preceding; 21 Jun. 1973; M. Matsumoto leg.; MNHAH • 12 ♀♀; same location as for preceding; 28 Jun. 1973; M. Matsumoto leg.; MNHAH • 1 ♀; same location as for preceding; 27 Jul. 1973; M. Mastumoto leg.; MNHAH • 2 ♀♀; same location as for preceding; 3 Aug. 1973; M. Matsumoto leg.; MNHAH • 1 ♀; same location as for preceding; 8 Aug. 1973; M. Matsumoto leg.; MNHAH • 1 ♀; Fukushima; 27 Jul. 1965; M. Munakata leg.; MNHAH • 1 ♀; Asahikawa, Inosawa; 30 May 1969; MNHAH • 4 ♀♀; same location as for preceding; 25 Jun. 1969; MNHAH • 6 ♀♀; same location as for preceding; 27 Jun. 1969; MNHAH • 14 ♀♀; same location as for preceding; 13 Jul. 1969; MNHAH • 1 ♀; same location as for preceding; 15 Jul. 1969; MNHAH • 1 ♀; same location as for preceding; 15 Aug. 1969; MNHAH • 2 ♀♀; same location as for preceding; 29 May 1970; MNHAH • 14 ♀♀; same location as for preceding; 10 Jun. 1970; MNHAH • 7 ♀♀; Nokanan; 8 Jun. 1967; MNHAH • 6 ♀♀; same location as for preceding; 22 Jun. 1967; MNHAH • 1 ♀; same location as for preceding; 27 Jun. 1967; MNHAH • 1 ♀; same location as for preceding; 6 Jul. 1967; MNHAH • 17 ♀♀; same location as for preceding; 21 Jul. 1967; MNHAH • 3 ♀♀; Sapporo, Hokkaido University Campus; 6 Jun. 1959; S.F. Sakagami leg.; MNHAH • 1 ♀; same location as for preceding; 11 Jun. 1959; S.F. Sakagami leg.; MNHAH • 1 ♀; same location as for preceding; 14 Jun. 1959; S.F. Sakagami leg.; MNHAH • 2 ♀♀; same location as for preceding; 18 Jun. 1959; S.F. Sakagami leg.; MNHAH • 4 ♀♀; same location as for preceding; 30 Jun. 1959; S.F. Sakagami leg.; MNHAH • 1 ♀; Yukomanbetsu; 22 Jul. 1967; MNHAH • 1 ♀; same location as for preceding; 4 Jul. 1968; MNHAH • 1 ♂; Ebetsubuto; 18 Jul. 1974; M. Ishikawa leg.; MNHAH. – Honshu • 1 ♀; Aomori Pref., Mt Iwaki; 5 Oct. 1980; M. Yamada leg.; MNHAN • 1 ♀; same location as for preceding; 14 Jul. 1981; M. Yamada leg.; MNHAH • 1 ♀; Miyagi Pref., Shiogamashi, Hojima; 19 May 1995; K. Gôukon leg.; cGou • 1 ♀; same location as for preceding; 25 May 1996; K. Gôukon leg.; cGou • 1 ♀; Niigata Pref., Sado Is., Dondenyama; 9 Jul. 1999; K. Gôukon leg.; cGou • 1 ♀; same location as for preceding; 10 Jul. 1999; K. Gôukon leg.; cGou • 1 ♀; Saitama Pref., Kodama; 6 Jun. 1968; T. Nambu leg.; ELKU • 4 ♀♀; same location as for preceding; 3 Jul. 1968; T. Nambu leg.; ELKU • 1 ♀; Nagano Pref., Yamaguchi-mura, Magome; 15 May 1975; O. Tadauchi leg.; ELKU • 5 ♀♀; Gifu Pref., Hikie; 5 Jun. 1978; K. Yamauchi leg.; MNHAH • 3 ♀; same location as for preceding; 28 Jun. 1978; K. Yamauchi leg.; MNHAH • 1 ♀; Wakayama Pref., Kibi; 2 Apr. 1969; M. Matsuura leg.; MNHAH • 1 ♀; same location as for preceding; 26 May 1969; M. Matsuura leg.; MNHAH • 1 ♀; Yamaguchi Pref., Toyoda-machi, Houra; 12 May 2004; T. Sugimoto leg.; cMur. – Kyushu • 5 ♀♀; Fukuoka Pref., Mt Wakasugi-yama; 22 Apr. 1973; O. Tadauchi leg.; ELKU • 1 ♀; Oita Pref., Kokonoemachi, Jizoubaru; 1 Nov. 1970; K. Kanmiya leg.; ELKU • 2 ♀♀; Oita Pref., Kusu-gun, Kokonoemachi, Handakougen; 5 Jun. 2004; T. Sugimoto leg.; cMur • 1 ♀; Oita Pref., Kusu-gun, Kokonoe-machi, Chojyabaru; 33°7′6.773″ N, 131°13′49.331″ E; 1050 m a.s.l.; 13 Aug. 2010; R. Murao leg.; cMur • 3 ♀♀; same location as for preceding; 14 Aug. 2010; R. and Y. Murao leg.; cMur • 1 ♀; same location as for preceding; 5 Sep. 2010; Y. Murao leg.; cMur • 8 ♀♀; same location as for preceding; 15 May 2011; R. and Y. Murao leg.; cMur • 3 ♀♀; same location as for preceding; 12 Aug. 2011; R. Murao leg.; cMur • 1 ♀; same location as for preceding; 28 Aug. 2011; R. Murao leg.; cMur • 1 ♀; same location as for preceding; 5 Aug. 2013; R. Murao leg.; ELKU • 2 ♀♀; Kumamoto Pref., Aso-gun, Aso-machi, Matoishi-Kario; 28 Sep. 2007; R. Murao and Y. Nishimura leg.; cMur • 2 ♀♀, 3 ♂♂; Kumamoto Pref., Aso-gun, Aso-machi, near Mt Komezuka; 23 Jul. 2004; R. Murao and T. Sugimoto leg.; cMur • 1 ♀; Kumamoto Pref., Aso-gun, Choyou-son, Kawayou; 26 May 2004; T. Sugimoto leg.; cMur. Distribution Japan (Hokkaido, Honshu, Kyushu, northern Ryukyus). Flight period Female: April to November. Male: July to September. The flight records of males are based on the paratypes collected or reared from the nest (Sakagami et al. 1966). Flower records The specimens examined in this paper were collected on the flowers of 50 species in 19 families as follows. Amaryllidaceae: Allium fistulosum L. Apiaceae: Sanicula chinensis Bunge. Asteraceae: Achillea alpina L. var. longiligulata H.Hara; Aster microcephalus (Miq.) Franch. & Sav. var. ovatus (Franch. & Sav.) Soejima & Mot.Ito; Erigeron annuus (L.) Pers.; Eupatorium glehnii F.Schmidt ex Trautv.; Ixeridium dentatum (Thunb.) Tzvelev subsp. dentatum; Leontodon taraxacoides (Vill.) Mérat; Picris hieracioides L. subsp. japonica (Thunb.) Krylov; Pterocypsela elata (Hemsl.) C.Shih; Sonchus sp.; Taraxacxum sp. Brassicaceae: Brassica rapa L. var. glabra Regel ‘Pe-tsai’; Brassica rapa L. var. oleifera DC.; Brassica rapa L. var. rapa; Capsella bursa-pastoris (L.) Medik.; Raphanus sativus L. var. hortensis Backer; Thlaspi arvense L. Campanulaceae: Lobelia sessilifolia Lamb. Commelinaceae: Commelina communis L. Convolvulaceae: Calystegia pubescens Lindl. Fabaceae: Trifolium pratense L.; Trifolium repens L. Gentianaceae: Gentiana zollingeri Fawc. Hydrangeaceae: Deutzia scabra Thunb.; Hydrangea macrophylla (Thunb.) Ser. f. macrophylla; Hydrangea serrata (Thunb.) Ser. var. serrata. Hypericaceae: Hypericum patulum Thunb. Iridaceae: Iris sanguinea Hornem. Lamiaceae: Prunella vulgaris L. subsp. asiatica (Nakai) H.Hara. Paeoniaceae: Paeonia suffruticosa Andrews. Papaveraceae: Chelidonium majus L. subsp. asiaticum H.Hara; Hylomecon japonica (Thunb.) Prantl & Kündig. Polygonaceae: Persicaria filiformis (Thunb.) Nakai ex W.T.Lee; Persicaria longiseta (Bruijn) Kitag. Ranunculaceae: Ranunculus cantoniensis DC.; Ranunculus chinensis Bunge; Ranunculus japonicus Thunb.; Ranunculus repens L. Rosaceae: Filipendula multijuga Maxim.; Geum japonicum Thunb.; Malus pumila Mill.; Potentilla fragarioides L. var. major Maxim.; Potentilla freyniana Bornm.; Rosa multiflora Thunb.; Rosa rugosa Thunb.; Rosa sp.; Rubus parvifolius L. Saururaceae: Houttuynia cordata Thunb. Habitat This species has been collected mainly from the mountain of western Japan. One of the collecting sites is shown in Fig. 19A. Biological reference Sakagami et al. (1966) and Sakagami (1992) reported on the biology of this species as univoltine and communal, with nest structure type Ia of Sakagami & Michener (1962).

Published as part of Murao, Ryuki, 2021, Redefinition of the sexstrigatus group of Lasioglossum (Hemihalictus) Cockerell, 1897 (Hymenoptera, Apoidea, Halictidae), with a revision of Japanese species, pp. 1-74 in European Journal of Taxonomy 763 on pages 21-24, DOI: 10.5852/ejt.2021.763.1463, http://zenodo.org/record/5235968