Lasioglossum (Sphecodogastra) vulsum ( Vachal, 1903 )

Murao, Ryuki, 2017, Bees of the Hemihalictus series of Lasioglossum Curtis (Hymenoptera, Halictidae) in South Korea, Zootaxa 4268 (4), pp. 451-488 : 477-479

Lasioglossum (Sphecodogastra) vulsum ( Vachal, 1903)

Figs 5C , 9 E

Halictus vulsus Vachal 1903: 130 [Lectotype: Muséum National d’ Histoire Naturelle, Paris, France; ♂, type locality = Nikkon Moyen , env. de Tokio et Alpes de Nikko (on label), Japan] . Lectotype designated by Ebmer (1978a: 202).

Halictus trispinis Vachal 1903: 131 [Holotype: Muséum National d’ Histoire Naturelle, Paris, France; ♀, Nikkon Moyen, env. de Tokio et Alpes de Nikko (on label), Japan]. Synonymy by Blüthgen (1926b: 349) (also see Ebmer et al. 2006: 31); Blüthgen 1926b: 349.

Lasioglossum (Evylaeus) trispine: Ebmer 1995: 571 ; Ebmer 1996: 280.

Lasioglossum (Evylaeus) vulsum: Ebmer et al. 2006: 31 , Fig. 1 (♀♂); Murao et al. 2006: Table 1, Figs 3A , 4B , 6 C–D, H, K (♀♂); Ebmer 2006: 558–560, 562, Figs 33–34 (♂); Murao & Tadauchi 2007: 236, 244 (in key), Figs 53–55, 57J, 59J (♀♂).

Evylaeus (Fratevylaeus) vulsus: Pesenko 2007b: 83 (in key), 91 (in key), 106, Figs 41–46 (♂).

Diagnosis. This species is similar to L. baleicum (Cockerell) and L. caliginosum Murao et al. from eastern Asia. Male of this species is separated from these species by a combination of the following character states: clypeus with yellow spot on lower half; mesoscutellum punctate ( Murao & Tadauchi 2007, Fig. 53L); tibiae with yellow spot basally and apically; gonostylus of genitalia trunctate on top (Murao et al. 2006, Figs 6 C–D); and ventral retrorse lobe of genitalia slender (Murao et al. 2006, Fig. 6 H). In contrast, both L. baleicum and L. caliginosum have clypeus generally black over entire surface, mesoscutellum reticulate-rugulose in L. baleicum and reticulatepunctate in L. caliginosum ( Murao & Tadauchi 2007, Figs 36L, 42L), tibiae nearly black over entire surface, gonostylus rounded in L. baleicum and ovate in L. caliginosum (Murao et al. 2006, Figs 6A–B, 6 E–F), and ventral retrorse lobe slender in L. baleicum and broad in L. caliginosum (Murao et al. 2006, Figs 6 G, 6I). The differences of female among L. baleicum , L. caliginosum , and L. vulsum are shown by Murao et al. (2006). As stated in L. baleicum , the differences of female among three species are subtle.

Specimens examined. (n = 1) [ South Korea] JB: 1♂, Jeonglyeongchi, 16. vii. 1991 (K. Kanmiya, ELKU). Distribution . North Korea, South Korea (new record), Russian Far East, China, Japan. Flight period in South Korea. Male: July. According to Maeta (2014), the life history of female in Japan are described as follows: overwintered females began to nest solitarily in early March and continued their nesting activity until early June; overwintered generation appeared from late May to mid June; new females dispersed from their natal nest after insermination.

Flower records in South Korea. Not recorded.

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 3. A: pronotum in lateral view. B, C: posterior surface of propodeum. D, E: posterior area of mesoscutum. A: Lasioglossum apristum (Vachal). B: L. affine (Smith). C: L. transpositum (Cockerell). D: L. sibiriacum (Blüthgen). E: L. hoffmanni (Strand). A – E: ♀.

FIGURE 4. A – F: inner hind tibial spur. A: L. affine (Smith). B: L. albipes villosum Ebmer. C: L. calceatum (Scopoli). D: L. nipponense (Hirashima). E: L. baleicum (Cockerell) or L. vulsum (Vachal). F: L. subfulvicorne subfulvicorne (Blüthgen). A – F: ♀. Scale bars: 0.2 mm.

FIGURE 5. A – E: mesoscutum. A: Lasioglossum laevoides Ebmer. B: L. subfulvicorne subfulvicorne (Blüthgen). C: L. vulsum (Vachal). D: L. nipponense (Hirashima). E: L. albipes villosum Ebmer. A – E: ♀.

FIGURE 6. A, B: metasoma. C, D: distal part of metasomal terga. E, F: basal area of T 1. A: Lasioglossum calceatum (Scopoli). B: L. albipes villosum Ebmer. C: L. speculinum (Cockerell). D, F: L. transpositum (Cockerell). E: L. sulcatulum sulcatulum (Cockerell). A – F: ♀.

FIGURE 9. A, B: posterior surface of propodeum. C, D: genitalia (C, ventral view; D: lateral view). E, F: mesoscutellum. A, C, F: Lasioglossum subfulvicorne subfulvicorne (Blüthgen). B: L. transpositum (Cockerell). D: L. duplex (Dalla Torre). E: L. vulsum (Vachal). A – F: ♂.