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Eucera actuosa (Cresson, 1878)


Scientific Name: Eucera actuosa (Cresson, 1878)

Common Name: Active Long-horned Bee


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 ( 16,158 km2

Index of Area of Occupancy (IAO) in Canada ( 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].


Cockerell TDA (1905) The bees of southern California. VIII. Bulletin of the Southern California Academy of Sciences 4: 28-33.

Sheffield C, Perron J (2014) Annotated catalogue of the bees described by Léon Provancher (Hymenoptera: Apoidea). The Canadian Entomologist 146 (2): 117-169.

Sheffield CS, Heron JM (2019) The bees of British Columbia (Hymenoptera: Apoidea, Apiformes). Journal of the Entomological Society of British Columbia 115: 44-85.

Criddle N, Curran CH, Viereck HL, Buckell ER (1924) The entomological record, 1923. Annual Report of the Entomological Society of Ontario 54: 87-102.

Fowler C (1899b) The Habropoda and Didasia of California. The Canadian Entomologist 31(1): 283-286.

Cresson ET (1878) Descriptions of new species of North American bees. Proceedings of the Academy of Natural Sciences of Philadelphia 30: 181-221.

Fowler C (1899a) The Synhalonia of California. The Canadian Entomologist 31(6): 137-138.

Provancher L (1896) Les dernières descriptions de l’abbé Provancher, Ordre des Hyménoptères. Naturaliste canadien 23: 27-28.

Tepidino VJ, Griswold TL, Bowlin (2010) Reproductive biology, hybridization, and flower visitors of rare Sclerocactus taxa in Utah's Uintah Basin. Western North American Naturalist 70(3): 377-386.

Toler TR, Evans EW, Tepedino VJ (2005) Pan-trapping for bees (Hymenoptera: Apiformes) in Utah's West Desert: the importance of color diversity. The Pan-Pacific Entomologist 81(3/4): 103-113.

Sociality: Solitary
Nesting: Ground
Pollen Specialization: Polylectic
Wintering Stage: Adult

Crop Preference: Not Available
Non Crop Preference: Not Available

Distribution: British Columbia
Ecozone: Pacific Maritime, Western Interior Basin

Distribution Map