Lasioglossum (Hemihalictus) taeniolellum ( Vachal, 1903 )

Murao, Ryuki, 2021, Redefinition of the sexstrigatus group of Lasioglossum (Hemihalictus) Cockerell, 1897 (Hymenoptera, Apoidea, Halictidae), with a revision of Japanese species, European Journal of Taxonomy 763, pp. 1-74 : 48-53

Lasioglossum (Hemihalictus) taeniolellum ( Vachal, 1903)

Figs 2B , 14 , 16F , 18C , 20I

Halictus taeniolellus Vachal, 1903: 131 (holotype: Muséum national d’histoire naturelle, Paris, France, ♀, type locality = Japan).

Halictus subfamiliaris Strand, 1910: 191 (holotype: ZMHB, ♀, type locality = Japan, examined). Synonymy by Ebmer (1978b).

Lasioglossum (Evylaeus) taeniolellum – Ebmer 1978b: 315.

Diagnosis

Females are similar to L. (H.) tadauchii , but are separated from them by the lineolation on postgena not reaching the apical margin, the distal process of the labrum with a horn-like lateral projection ( Fig. 14D ), and T1 nearly smooth. In contrast, in L. (H.) tadauchii , the postgena have a distinct lineolation across the entire surface, the distal process of the labrum is without a lateral projection ( Murao 2012: fig. 5), and T1 has short hairs and fine PP on the disc ( Murao 2012: fig. 7).

Material examined

JAPAN – Hokkaido • 1 ♀; Ashoro-cho, Ashoro ; 43°20′0″ N, 143°40′0″ E; 2 Jul. 2013; O. Tadauchi leg.; ELKU • 1 ♀; Nishiashoro ( Tokachi ); 8 Aug. 1955; Y. Hirashima leg.; ELKU • 1 ♀; Ashoro-gun, Metou ; 19 Jun. 1957; M. Takahashi leg.; ELKU • 1 ♀; Sapporo, Hokkaido Univeristy Campus ; 3 Sep. 1969; S.F. Sakagami leg.; MNHAH • 1 ♀; Ebetsubuto ; 8 May 1974; M. Ishikawa leg.; MNHAH. – Honshu • 13 ♀♀; Iwate Pref., Morioka, Kuriyagawa ; 16 May 1964; Y. Maeta leg.; ELKU • 4 ♀♀; same location as for preceding; 2 Jun. 1964; Y. Maeta leg.; ELKU • 1 ♀; Miyagi Pref., Sendai, Tsuchitoi ; 10 May 1977; K. Gôukon leg.; MNHAH • 1 ♀; Ibaraki Pref., Tsukuba, Kouyadai ; 22 Jun. 1989; T. Matsumura leg.; MNHAH • 1 ♀; Saitama Pref., Urawa ; 24 Aug. 1968; T. Nambu leg.; ELKU • 3 ♀♀; Yamanashi Pref., Nakagawa ; 9 Apr. 1962; T. Saigusa leg; commented by Dr Hirashima as “compared with the type of Halictus taeniolellus Vachal ♀” the under label; ELKU • 1 ♀; Kyoto Pref., Expet. Internal. Forest, Kyoto Univ .; 10 Aug. 1985; T. Kakutani leg.; MNHAH. – Kyushu • 4 ♀♀; Fukuoka Pref., Fukuoka-shi, Higashi-ku, Hakozaki , Kyushu Univ. ; 10 Jul. 2004; T. Sugimoto leg.; ELKU • 18 ♀♀; same location as for preceding; 18 Apr. 2006; R. Murao leg.; cMur • 1 ♀; same location as for preceding; 15 Jul. 2006; R. Murao leg.; cMur • 14 ♀♀, 5 ♂♂; same location as for preceding; 5 Jul. 2009; R. Murao leg.; cMur • 1 ♀; same location as for preceding; 29 Mar. 2012; R. Murao leg.; ELKU • 2 ♀♀; Kumamoto Pref., Aso-gun, Aso-machi ; 20 Apr. 2001; A. Yamada and M. Nomura leg.; AETU • 1 ♀; same location as for preceding; 20 May 2001; A. Yamada leg.; AETU • 2 ♀♀; same location as for preceding; 28 May 2001; A. Yamada and M. Nomura leg.; AETU • 7 ♀♀; same location as for preceding; 7 Jun. 2001; A. Yamada and M. Nomrua leg.; AETU • 3 ♀♀; same location as for preceding; 16 Jun. 2001; A. Yamada and M. Nomura leg.; AETU • 1 ♀; same location as for preceding; 2 Jul. 2001; A. Yamada leg.; AETU • 1 ♀; same location as for preceding; 17 Sep. 2001; M. Nomura leg.; AETU • 2 ♀♀; same location as for preceding; 20 Oct. 2001; M. Nomura leg.; AETU • 1 ♀; same location as for preceding; 20 Nov. 2001; M. Nomura leg.; AETU • 3 ♀♀; Kumamoto Pref., Aso-gun, Choyo-son ; 13 Jun. 2003; D. Kozai and M. Ishida leg.; AETU • 2 ♀♀; same location as for preceding; 21 Jun. 2003; M. Ishida leg.; AETU • 1 ♀; same location as for preceding; 26 Jun. 2003; M. Ishida leg.; AETU • 1 ♀; same location as for preceding; 2 Jul. 2003; M. Ishida leg.; AETU • 1 ♀; Kumamoto Pref., Aso-gun, Choyo-son, Setaura ; 9 Jul. 1996; M. Yamada leg.; AETU • 1 ♀; Kumamoto Pref., Aso-gun, Ozu-machi ~ Choyo-son ; 7–9 Oct. 2002; K. Mitai leg.; ELKU • 1 ♀; Kumamoto Pref., Kikuchi-gun, Ozu-machi ; 2 Apr. 2002; T. Sugimoto leg.; AETU • 1 ♀; same location as for preceding; 25 Apr. 2002; Y. Terada leg.; AETU • 1 ♀; same location as for preceding; 21 Jul. 2002; Y. Terada leg.; AETU • 3 ♀♀; same location as for preceding; 18 Apr. 2003; M. Ishida leg.; AETU • 2 ♀♀; same location as for preceding; 28 Apr. 2003; M. Ishida and D. Kozai leg.; AETU • 1 ♀; same location as for preceding; 9 May 2003; M. Ishida leg.; AETU • 3 ♀♀; same location as for preceding; 20 May 2003; D. Kozai and M. Ishida leg.; AETU • 1 ♀; same location as for preceding; 29 May 2003; M. Ishida leg.; AETU • 3 ♀♀; same location as for preceding; 5 Jun. 2003; D. Kozai leg.; AETU • 6 ♀♀; same location as for preceding; 13 Jun. 2003; M. Ishida and D. Kozai leg.; AETU • 1 ♀; same location as for preceding; 21 Jun. 2003; D. Kozai leg.; AETU • 2 ♀♀; same location as for preceding; 5 Jul. 2003; M. Ishida leg.; AETU • 1 ♀; same location as for preceding; 26 Jul. 2003; M. Ishida leg.; AETU • 1 ♀; same location as for preceding; 13 Aug. 2003; M. Ishida leg.; AETU • 3 ♀♀; same location as for preceding; 22 Aug. 2003; M. Ishida and D. Kozai leg.; AETU • 1 ♀; same location as for preceding; 26 Sep. 2003; M. Ishida leg.; AETU • 1 ♀; same location as for preceding; 30 Oct. 2003; M. Ishida leg.; AETU • 2 ♀♀; Kumamoto Pref., Aso-gun, Nishihara-mura ; 22 Apr. 2000; R. Murao leg.; AETU • 4 ♀♀; same location as for preceding; 29 Apr. 2000; R. Murao and M. Murase leg.; AETU • 1 ♀; same location as for preceding; 12 May 2000; M. Murase leg.; AETU • 2 ♀♀; same location as for preceding; 20 May 2000; R. Murao and M. Murase leg.; AETU • 4 ♀♀; same location as for preceding; 29 May 2000; R. Murao and M. Murase leg.; AETU • 1 ♀; same location as for preceding; 11 Jun. 2000; R. Murao leg.; AETU • 1 ♀; same location as for preceding; 14 Jun. 2000; M. Murase leg.; AETU • 1 ♀; same location as for preceding; 26 Jun. 2000; R. Murao leg.; AETU • 2 ♀♀; same location as for preceding; 14 Aug. 2000; R. Murao and M. Murase leg.; AETU • 1 ♀; same location as for preceding; 16 Aug. 2000; M. Murase leg.; AETU • 1 ♀; same location as for preceding; 28 Aug. 2000; M. Murase leg.; AETU • 1 ♀; same location as for preceding; 1 Oct. 2000; M. Murase leg.; AETU • 1 ♀; same location as for preceding; 6 Nov. 2000; M. Murase leg.; AETU • 2 ♀♀; same location as for preceding; 8 Dec. 2000; M. Murase leg., AETU • 8 ♀♀; Kumamoto Pref., Kikuchigun, Kikuyo-machi ; 22 Apr. 2000; R. Murao and M. Murase leg.; AETU • 8 ♀♀; same location as for preceding; 29 Apr. 2000; R. Murao and M. Murase leg.; AETU • 6 ♀♀; same location as for preceding; 12 May 2000; R. Murao and M. Murase leg.; AETU • 7 ♀♀; same location as for preceding; 20 May 2000; R. Murao and M. Murase leg.; AETU • 15 ♀♀; same location as for preceding; 29 May 2000; R. Murao and M. Murase leg.; AETU • 2 ♀♀; same location as for preceding; 14 Jun. 2000; M. Murase leg.; AETU • 5 ♀♀; same location as for preceding; 26 Jun. 2000; R. Murao and M. Murase leg.; AETU • 1 ♀; same location as for preceding; 6 Jul. 2000; M. Murase leg.; AETU • 1 ♀; same location as for preceding; 16 Aug. 2000; M. Murase leg.; AETU • 1 ♀; same location as for preceding; 28 Aug. 2000; R. Murao leg.; AETU • 1 ♀; same location as for preceding; 8 Sep. 2000; M. Murase leg.; AETU • 2 ♀♀; same location as for preceding; 19 Sep. 2000; M. Murase leg.; AETU • 5 ♀♀; same location as for preceding; 10 Oct. 2000; R. Murao and M. Murase leg.; AETU • 9 ♀♀; same location as for preceding; 19 Oct. 2000; R. Murao and M. Murase leg.; AETU • 5 ♀♀; same location as for preceding; 27 Oct. 2000; R. Murao and M. Murase leg.; AETU • 1 ♀; same location as for preceding; 6 Nov. 2000; M. Murase leg.; AETU .

Redescription

Female

MEASUREMENTS (n=5, unit mm). BL =5.38–5.50 (5.35± 0.21), WL= 4.38–4.88 (4.55 ± 0.21), HL=1.42– 1.48 (1.45 ±0.02), HW= 1.55–1.61 (1.57± 0.03), IOD =0.29–0.32 (0.30 ± 0.01), OOD=0.24–0.29 (0.26 ± 0.02), OCD= 0.18–0.21 (0.19± 0.01), UOD= 0.97–1.00 (0.97± 0.01), MOD =1.13–1.16 (1.15± 0.02), LOD =0.84–0.90 (0.87 ±0.02), IAD =0.15–0.16 (0.15 ± 0.01), AOD=0.29–0.31 (0.30 ± 0.01), CAL =0.26–0.27 (0.26 ± 0.01), CPL=0.29–0.32 (0.31 ±0.02), EL=1.70–1.75 (1.72± 0.03), EW =0.39–0.45 (0.42 ± 0.03), GW=0.23–0.35 (0.30 ± 0.05), SPL=0.61–0.65 (0.63 ± 0.01), F1L=0.08– 0.10 (0.09 ±0.01), F2L=0.08 (0.08 ± 0.00), F3L=0.08 (0.08 ± 0.00), F2W= 0.11–0.13 (0.13± 0.01), MsW = 1.80–1.85 (1.83 ±0.03), SCL= 0.38–0.40 (0.40 ± 0.01), MNL=0.20–0.23 (0.22 ± 0.01), MPL =0.25–0.30 (0.28 ±0.02), MtW=1.85–2.05 (1.90 ± 0.09).

COLORATION. Body black except for the following parts: mandible reddish brown apically; all flagellar segments brown or F5–F10 yellowish brown ventrally; tegula yellowish brown translucent; tibial spur yellow; metasomal terga broadly yellowish brown translucent apically. Wings transparent, veins and stigma yellowish brown.

PUBESCENCE. Body hairs whitish, and covered with erect and sparse straight or fine branched hairs except for the following parts: pronotal dorsum to lobe and metanotum moderately densely tomentose; posterior surface of propodeum sparsely tomentose; hind trochanter, femur, and tibia mixed with plumose hairs, forming scopa. Disc of T1 without short hairs on medial area. Discs of T2–T4 with moderately dense short hairs over entire surface.

STRUCTURE AND SCULPTURE HEAD. Wider than long; HW:HL= 1:0.92. Vertex rounded in frontal view. MOD:UOD:LOD =1:0.85:0.76. IOD:OOD:OCD =1:0.87:0.65. IAD:AOD =1:1.96. Ocellocular area densely puctate, IS nearly smooth (IS = 0.5–2 d). Paraocular area and frons weakly shiny, with shallow reticulate PP. Supraclypeal area slightly convex, dimly shiny, with dense PP; IS distinctly tessellate (IS= 0.5–1.5 d). CPL:CAL=1:0.85. Clypeus nearly flat, with reticulate PP nearly over entire surface, its PP gradually sparser toward lower area; IS nearly smooth on lower area (IS =0.5–2 d on lower area). EW:GW=1:0.71. Genal area with weak straight ridges. Malar space linear. Occiput not carinate. Hypostomal carinae nearly parallel. Postgena weakly tessellate, sometimes nearly smooth in part. Mandible bidentate. Labrum ( Fig. 14D ): basal area approximately 2.1× as wide as long; distal process approximately 0.7× as long as basal area, narrow, and with horn-like lateral projection; distal keel narrow, pointed apically. Antenna short, not reaching metasoma. F2L:F2W=1:1.56; flagellum nearly flattened ventrally.

THORAX. Dorsolateral angle of pronotum obtuse; lateral surface without ridges; lateral lobe rounded. Tegula ovoid, nearly smooth. Mesoscutum ( Fig. 14E ) with dense PP over entire surface; IS distinctly tessellate over entire surface (IS=0.5–2 d); parapsidal line a narrow groove. Mesoscutellum with sparse PP on submedian area and denser PP on marginal area; IS nearly smooth over entire surface (IS =1–3 d on submedian area, and 0.5–1 d on marginal area). Metanotum weakly rugulose. Mesepisternum with reticulate PP over entire surface. SCL:MNL:MPL=1:0.56:0.71. Propodeum: metapostnotum ( Fig. 14F ) weakly shiny and gently inclined, with short straight ridges occupying only anterior half, with weak tessellation on posterior half; junction between metapostnotum and posterior surface not carinate, weakly tessellate; lateral surface weakly rugulose and distinctly tessellate; posterior surface with lateral carina on lower half, without oblique carina. Coxae normal shape, without tubercle. Fore trochanter narrow, longer than wide. Basitibial plate of hind leg carinate marginally. Inner hind tibial spur with 2–5 slender teeth as in Fig. 20I (n =13). Fore wing with three submarginal cells.

ABDOMEN. Disc of T1 nearly smooth over entire surface ( Fig. 16F ). Disc of T2 very weakly lineolate in part (only anterior or both anterior and posterior area). T3–T4 very weakly lineolate over entire surface.

First description of male

MEASUREMENTS (n=5, unit mm). BL =3.92–5.23 (4.68 ± 0.56), WL= 3.23–4.00 (3.71± 0.27), HL=1.18– 1.44 (1.32 ±0.10), HW= 1.27–1.51 (1.41 ± 0.09), IOD =0.22–0.31 (0.28 ± 0.03), OOD=0.24–0.27 (0.25 ± 0.01), OCD= 0.18–0.22 (0.20± 0.02), UOD= 0.84–0.98 (0.92± 0.05), MOD =0.89–1.07 (1.00± 0.06), LOD =0.60–0.76 (0.70 ±0.06), IAD =0.18–0.22 (0.20 ± 0.02), AOD=0.18–0.22 (0.20 ± 0.02), CAL =0.20–0.27 (0.24 ± 0.02), CPL=0.29–0.31 (0.30 ±0.01), EL=0.87–1.09 (0.98± 0.07), EW =0.40–0.47 (0.43 ± 0.03), GW=0.27–0.33 (0.29 ± 0.03), SPL=0.31–0.38 (0.35 ± 0.03), F1L=0.09– 0.11 (0.11 ± 0.01), F2L=0.18–0.22 (0.21± 0.02), F3L=0.18–0.24 (0.22 ± 0.02), F2W=0.11–0.13 (0.12 ± 0.01), MsW = 1.19–1.48 (1.34 ± 0.10), SCL= 0.29–0.38 (0.33 ± 0.03), MNL=0.13–0.18 (0.16 ± 0.02), MPL =0.22–0.24 (0.23 ± 0.01), MtW= 1.03–1.29 (1.19± 0.02).

COLORATION. Body black except for the following parts: lower half of clypeus yellow; mandible except for apically and labrum yellow; mandible apically reddish; all flagellar segments yellowish brown ventrally; pronotal lobe yellow or yellowish brown; tegula yellow translucent; tibiae basally and apically yellow; tibial spur yellow; tarsi yellow; metasomal terga broadly yellowish brown translucent apically. Wings transparent, veins and stigma yellowish brown.

PUBESCENCE. Body hairs whitish, and covered with erect and sparse straight or fine branched hairs except for the following parts: lower paraocular area, supraclypeal area, pronotal dorsum to lobe and metanotum thinly tomentose. Metasomal terga with sparse, simple and short hairs over entire surface.

STRUCTURE AND SCULPTURE HEAD. Wider than long; HW:HL= 1:0.93. Vertex rounded in frontal view. MOD:UOD:LOD =1:0.92:0.70. IOD:OOD:OCD =1:0.90:0.71. IAD:AOD =1:1.00. Ocellocular area with reticulate PP. Paraocular area and frons weakly shiny, with shallow reticulate PP. Supraclypeal area nearly flat, weakly shiny, with moderately dense PP over entire surface; IS nearly smooth (IS= 0.5–3 d). Clypeus weakly shiny, with dense PP over entire surface; IS nearly smooth (IS =0.5–1 d). CPL:CAL=1:0.78. EW:GW =1:0.68. Genal area with weak straight ridges. Malar space linear. Occiput not carinate. Hypostomal carinae nearly parallel. Postgena longitudinal lineolate. Mandible edentate. Antenna short, not reaching metasoma. F2L:F2W=1:0.58; flagellum nearly flattened ventrally.

THORAX. Dorsolateral angle of pronotum obtuse; lateral surface without ridges; lateral lobe rounded. Tegula ovoid, nearly smooth. Mesoscutum with dense PP over entire surface; IS smooth except for anteriorly weakly tessellate (IS= 0.5–2 d); parapsidal line a narrow groove. Mesoscutellum with sparse PP over entire surface; IS smooth (IS =1–5 d). Metanotum weakly rugulose. Mesepisternum with moderately dense PP over entire surface; IS smooth (IS= 1–3 d). SCL:MNL:MPL=1:0.49:0.68. Propodeum: metapostnotum shiny and gently inclined, with short straight ridges occupying only

anterior half, weakly tessellate or nearly smooth on posterior half; junction between metapostnotum and posterior surface not carinate, weakly tessellate or nearly smooth; lateral surface weakly rugulose and distinctly tessellate; posterior surface with lateral carina on lower half, without oblique carina. Coxae normal shape, without tubercle. Fore trochanter narrow, longer than wide. Basitibial plate of hind leg weakly carinate marginally. Inner hind tibial spur without tooth. Fore wing with three submarginal cells.

ABDOMEN. Disc of T1 without distinct PP and tessellation. Disc of T2–T4 with sparse fine PP, T2 without lineolation, T3 with weak lineolation on apical half, and T4 with weak lineolate over entire surface. S7 with moderately long, apically truncate or rounded median process.

GENITALIA. Gonobase flat at bottom; gonocoxite smooth; ventral retrorse lobe tongue-like, moderately long but not reaching gonobase, with sparse short hairs ventrally.

Distribution

Japan (Hokkaido, Honshu, Izu-shotô Islands, Shikoku, Kyushu, Tsu-shima Is., northern Ryukyus), Korean Peninsula.

Flight period

Female: April to December.

Males have been collected from August to September in the Korean Peninsula ( Ebmer 1978b). In Japan, males have been collected at one site (Hakozaki Campus, Kyushu University, Japan, Fig. 19C ) from June to July.

Flower records

The specimens examined in this paper were collected on the flowers of 46 species in 23 families as follows. Amaranthaceae : Achyranthes bidentata Blume var. japonica Miq. ; Amaranthus blitum L. Anacardiaceae : Toxicodendron trichocarpum (Miq.) Kuntze. Asteraceae : Artemisia indica Willd. var. maximowiczii (Nakai) H.Hara ; Aster microcephalus (Miq.) Franch. & Sav. var. ovatus (Franch. & Sav.) Soejima & Mot.Ito ; Erigeron annuus (L.) Pers.; Erigeron philadelphicus L.; Euchiton japonicus (Thunb.) Anderb. ; Lapsanastrum humile (Thunb.) Pak & K.Bremer ; Picris hieracioides L. subsp. japonica (Thunb.) Krylov ; Solidago altissima L.; Sonchus asper (L.) Hill; Taraxacum sp. ; Youngia japonica (L.) DC. Brassicaceae : Brassica rapa L. var. oleifera DC. ; Capsella bursa-pastoris (L.) Medik.; Rorippa indica (L.) Hiern. Campanulaceae : Lobelia chinensis Lour. Caryophyllaceae : Silene armeria L.; Stellaria aquatica (L.) Scop. Commelinaceae : Commelina communis L. Cucurbitaceae : Momordica charantia L. Elatinaceae : Stellaria sp. Ericaceae : Rhododendron sp. Fabaceae : Astragalus sinicus L.; Trifolium dubium Sibth. ; Trifolium repens L. ; Vicia hirsuta (L.) Gray; Vicia sativa L. subsp. nigra (L.) Ehrh. Geraniaceae : Geranium carolinianum L. Lamiaceae : Lamium album L. var. barbatum (Siebold & Zucc.) Franch. & Sav. ; Lamium amplexicaule L.; Vitex negundo L. var. cannabifolia (Siebold & Zucc.) Hand. -Mazz. Mazaceae : Mazus pumilus (Burm.f.) Steenis. Oxalidaceae : Oxalis corniculata L. Papaveraceae : Corydalis incisa (Thunb.) Pers. Plantaginaceae : Veronica persica Poir. Polygonaceae : Persicaria longiseta (Bruijn) Kitag. ; Persicaria sagittata (L.) H.Gross var. sibirica (Meisn.) Miyabe. Portulacaceae : Portulaca oleracea L. Ranunculaceae : Ranunculus cantoniensis DC. ; Ranunculus sceleratus L. Rosaceae : Kerria japonica (L.) DC. f. albescens (Makino ex Koidz.) Ohwi ; Pourthiaea villosa (Thunb.) Decne. var. villosa . Rubiaceae : Paederia foetida L. Solanaceae : Solanum nigrum L.

Habitat

This species has been collected mainly in cultivated or urban lowland areas and semi-natural grassland in Kyushu, western Japan. One of the collection sites in Japan is shown in Fig. 19C .

Figures

Fig. 2. A, E. Lasioglossum (Hemihalictus) sexstrigatus (Schenck, 1869). A. ♂, lateral habitus. E. ♀, mesepisternum. — B. L. (H.) taeniolellum (Vachal, 1903), ♂, labrum. — C, F. L. (H.) frigidum Sakagami & Ebmer, 1996. C. ♂, cephalic polymorphism. F. ♀, metasomal terga. — D. L. (H.) simplicior (Cockerell, 1931), ♂, cephalic polymorphism. Scale bars: A = 2 mm; B = 0.2 mm; C, E = 0.5 mm; D, F = 1 mm.

Fig. 14. Lasioglossum (Hemihalictus) taeniolellum (Vachal, 1903). A. ♀, lateral habitus. B. ♀, head in frontal view. C. ♂, head in frontal view. D. ♀, labrum. E. ♀, mesoscutum. F. ♀, metapostnotum. Scale bars: A = 3 mm; B–C, E–F = 0.5 mm; D = 0.25 mm.

Fig. 16. 1st metasomal tergum, ♀. A–B. Lasioglossum (Hemihalictus) spectrum sp. nov. C. L. (H.) speculinum (Cockerell, 1925). D. L. (H.) sphecodicolor Sakagami & Tadauchi, 1995. E. L. (H.) subsimplicior sp. nov. F. L. (H.) taeniolellum (Vachal, 1903). Scale bars: 1 mm.

Fig. 18. Distribution maps. A. Lasioglossum (Hemihalictus) sphecodicolor Sakagami & Tadauchi, 1995. B. L. (H.) subsimplicior sp. nov. C. L. (H.) taeniolellum (Vachal, 1903). D. L. (H.) amamiense Ebmer & Sakagami, 1994 (red circle), L. (H.) ikudomei sp. nov. (purple circle), L. (H.) smilodon Ebmer & Sakagami, 1994 (light blue circle) and L. (H.) tadauchii Murao, 2012 (yellow circle).

Fig. 20. Female inner hind tibial spur. A. Lasioglossum (Hemihalictus) frigidum Sakagami & Ebmer, 1996. B. L. (H.) ikudomei sp. nov. C. L. (H.) kiautschouense (Strand, 1910). D. L. (H.) ohei Hirashima & Sakagami, 1966. E. L. (H.) smilodon Ebmer & Sakagami, 1994. F. L. (H.) spectrum sp. nov. G. L. (H.) speculinum (Cockerell, 1925). H. L. (H.) sphecodicolor Sakagami & Tadauchi, 1995. I. L. (H.) taeniolellum (Vachal, 1903). Scale bars: 0.2 mm.

Fig. 19. Habitat in Japan. A. Chojyabaru, Kokonoe-machi, Kusu-gun, Oita Pref., Kyushu, Japan. B. Kyushu Univ., Hikosan Exp. St., Soeda-machi, Fukuoka Pref., Kyushu, Japan. C. Kyushu Univ., Hakozaki, Higashi-ku, Fukuoka-shi, Fukuoka Pref., Kyushu Japan. D. Nigino-hama, Itoshima-shi, Fukuoka Pref., Kyushu, Japan.