Sphecodes mandibularis Cresson 1872 ( mandibularis group)

Lectotype. ♀ USA, Texas, Bosque Co.: G.W. Belfrage (ANSP: 2133). Designated by Cresson (1916).

= Sphecodes stygius Robertson 1893

Lectotype. ♀ USA, Illinois, Carlinville, 12 Aug. 1891, C.A. Robertson (INHS: 11944). Designated by W.E. LaBerge in Webb (1980).

County records: Allegan, Antrim, Barry, Benzie, Charlevoix, Clinton, Kalamazoo, Leelanau, Livingston, Montcalm, Van Buren.

Notes. The synonymy of these two names, proposed by M. Arduser, has not been well established in the literature, although S. mandibularis has been used in faunal studies for the species (Wolf & Ascher 2009, Ascher et al. 2014, Goldstein & Ascher 2016). Mitchell (1960) treated the species as S. stygius rather than S. mandibularis because the female lectotype of the latter from Bosque County, Texas was extralimital.