Lasioglossum (Dialictus) ellipticeps (Blüthgen, 1923)

Fig. 2A

Halictus ellipticeps Blüthgen 1923: 254 [Holotype: Museum für Naturkunde Humboldt Universität zu an der Berlin, Germany, ♀, type locality = Amur, Russia].

Halictus permicus Blüthgen 1923: 330 [Lectotype: Institute of Systematic and Experimental Zoology, Polish Academy of Sciences, Krakow, Poland, ♂, type locality = “ Perm ", designated by Pesenko (2007b: 117)]. Synonymy by Ebmer (1978b: 310).

Halictus (Chloralictus) mayacensis Cockerell 1924b: 582 [Syntypes: 17♀, U. S. National Museum of Natural History, Smithsonian Institution, Washington, D.C, USA; 2♀, Zoological Institute, Russian Academy of Sciences, St. Petersburg ( Pesenko 2007b: 117), type locality = Primorsky, Russia]. Synonymy by Blüthgen (1931: 215).

Lasioglossum (Evylaeus) ellipticeps: Ebmer 1978b: 310; Ebmer 1982: 215; Ebmer 1996: 282; Ebmer 2005: 375; Ebmer 2006: 565.

Evylaeus (Smeathhalictus) ellipticeps: Pesenko 2007a: 28; Pesenko 2007b: 85 (in key), 97 (in key), 117, Figs 124–127 (♂). Lasioglossum (Dialictus) ellipticeps: Murao et al. 2015a: 37, 44–45 (in key), Figs 20–21, 26B (♀ ♂).

Diagnosis. According to Pesenko (2007b), this species is similar to L. briseis Ebmer and L. eomontanus Ebmer from eastern Asia. It is separated from these species by the following character states: female supraclypeus and clypeus dimly shiny, with denser PP (IS = <1 d); female mesoscutum with denser PP (IS = 0.3–1 d); male legs black; inner hind tibial spur of female with three and very long teeth; and ventral retrorse lobe of male genitalia tongue-like, rounded apically (Pesenko 2007b, Fig. 126; Murao et al. 2015a, Fig. 21D). In contrast, in L. briseis and L. eomontanus, the female supraclypeus and clypeus more shiny, with sparser PP (IS => 1 d), the female mesoscutum with sparser PP (IS = 0.5–1.5 d), the male tarsi yellow, the inner hind tibial spur of female with five and relatively short teeth, and the ventral retrorse lobe of male genitalia pointed apically (Pesenko 2007b, Figs 119, 122).

Distribution. North Korea, South Korea, Mongolia, Russian Far East.

Flight period in South Korea. Female: May to August. Male: July.

Flower records in South Korea. The floral records are reported as 10 species in six families by Murao et al. (2015a).