Eucera actuosa (Cresson, 1878)

Melissodes actuosa Cresson, 1878: 208 [♀].

     Lectotype ♀, designated by Cresson (1916: 110). USA, California, by H. Edwards [ANSP no. 2320].

Diadasia 3-cincta Provancher, 1896: 28 [♀]. Synonymy suspected by Timberlake (1969: 12); synonymy by Sheffield and Perron (2014: 147).

     Lectotype ♀, designated by Sheffield and Perron (2014: 147). USA, California, Los Angeles [ULQC no. 1731],

Didasia tricincta Fowler, 1899: 286. Emended name. Synonymy suspected by Timberlake (1969: 12); synonymy by Sheffield and Perron (2014: 147).

Synhalonia californica Fowler, 1899: 137 [♀]. Preoccupied; not Eucera californica (Cresson, 1878). Synonymy of Synhalonia fowleri Cockerell, 1905 by Cockerell (1905: 28); synonymy by Timberlake (1969: 12).

     Syntypes ♀. USA, California, Berkeley, 1, 9 May 1898, by H.O. Woodworth and C. Fowler [???].

Synhalonia fowleri Cockerell 1905: 28 [♀]. Synonymy by Timberlake (1969: 12).

     Syntypes ♀. USA, California, Los Angeles [six specimens]; Lancaster [one specimen], by Davidson [???].

Taxonomic notes: As noted by Sheffield and Perron (2014: 147), Timberlake (1969: 13) placed Diadasia tricincta (Provancher, 1896) into synonymy under E. actuosa (Cresson, 1878) with ‘‘almost’’ certainty, but did not indicate that Provancher’s type material was examined. In the same year, Adlakha (1969) placed Provancher’s species into synonymy under Diadasia enavata (Cresson) likely following Fowler (1899b: 286); though the location of Provancher’s type material was indicated in that work, Adlakha (1969) gave no indication that it was examined. Provancher’s species was subsequently recorded as a questionable synonym of D. enavata by Hurd (1979), but Sheffield and Perron (2014: 147) later confirmed Timberlake’s (1969) synonymy.

Although Synhalonia territella Cockerell 1905 was listed as a synonym of Eucera actuosa by Hurd (1979: 2125); more recent works have treated it as a valid species (Toler et al. 2005; Tepidino et al. 2010); therefore, it is not included in the list of synonymies here.

Extent of Occurrence (EOO) in Canada (http://geocat.kew.org/): 16,158 km2

Index of Area of Occupancy (IAO) in Canada (http://geocat.kew.org/): 64 km2

Distribution in Canada: Criddle et al. 1924 [BC, as Tetralonia actuosa (Cresson, 1878), and as Tetralonia fowleri (Cockerell, 1905)]; Michener 1951 [BC, Tetralonia actuosa (Cresson, 1878), and as Tetralonia fowleri (Cockerell, 1905)]; Sheffield and Heron 2019 [BC].