Lasioglossum (Dialictus) viridellum ( Cockerell, 1931 )

Murao, Ryuki, 2017, Bees of the Hemihalictus series of Lasioglossum Curtis (Hymenoptera, Halictidae) in South Korea, Zootaxa 4268 (4), pp. 451-488 : 457

Lasioglossum (Dialictus) viridellum ( Cockerell, 1931)

Halictus (Chloralictus) viridellus Cockerell 1931: 14 [Holotype: American Museum of Natural History, New York, USA, ♀, type locality = Shanghai, China].

Lasioglossum (Evylaeus) viridellum: Ebmer 1978b: 312 ; Ebmer 1996: 283; Ebmer 2006: 568. Evylaeus (Aerathalictus) viridellus: Pesenko 2007b: 85 (in key), 97 (in key), 114, Figs 104–06 (♂). Lasioglossum (Dialictus) viridellum: Murao et al. 2015a: 9 , 44 (in key), Figs 1 , 2A –E, 3B (♀ ♂).

Diagnosis. This species is separated from other East Asian members of the aeratum group by a combination of the following character states: male clypeus entirely black, without yellow spot; female T1 basally with thin appressed hairs and basally to medially with strong lineolation ( Murao et al. 2015a, Fig. 25A); male metasomal sterna with sparse and uniform hairs. Males of both this species and L. pseudannulipes (Blüthgen) cannot be clearly separated ( Murao et al. 2015a).

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

Flight period in South Korea. Female: April to September. Male: September.

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

Figures

FIGURE 1. A: fore wing of female. B – E: lateral habitus of four subgenera of Lasioglossum occurring in South Korea. A – B: L. (Acanthalictus) dybowskii (Radoszkowski). C: L. (Dialictus) miyabei Murao, Ebmer & Tadauchi. D: L. (Hemihalictus) transpositum (Cockerell). E: L. (Sphecodogastra) apristum (Vachal). A – E: ♀.

FIGURE 2. A, B: body color of head and mesosoma. C, D, F: mesepisternum. E: pronotum in lateral view. A: Lasioglossum ellipticeps (Blüthgen). B: L. calceatum (Scopoli). C: L. apristum (Vachal). D: L. miyabei Murao, Ebmer & Tadauchi. E, F: L. percrassiceps (Cockerell). A – F: ♀.