Xenoglossa davidsoni Cockerell, 1905:28, ♀. Holotype ♀, Los Angeles (leg. Dr. Davidson); LaBerge, 2001LaBerge, W.E. 2001. Revision of the bees of the genus Tetraloniella in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36 (1-3):67-162.:141, Holotype ♀ (CAS, No. 15,551). - Cockerell, 1905Cockerell, T.D.A. 1905. The bees of southern California. - VII. Bulletin of the Southern California Academy of Sciences 4 (1):13-15. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The North American bees of the family Anthophoridae. Transactions of the American Entomological Society 32 (1):63-116. (distribution); Cockerell, 1913Cockerell, T.D.A. 1913. Names applied to the Eucerine bees of North America. Proceedings of the United States National Museum 43:261-273. (distribution); Lutz & Cockerell, 1920Lutz, F.E. & T.D.A. Cockerell 1920. Notes on the distribution and bibliography of North American bees of the families, Apidae, Meliponidae, Bombidae, Euglossidae, and Anthophoridae. Bull. Amer. Mus. Nat. Hist 42 (15):491-641. (distribution). - As Tetraloniella davidsoni: - LaBerge, 2001LaBerge, W.E. 2001. Revision of the bees of the genus Tetraloniella in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36 (1-3):67-162. (distribution); Esperanza de Pedro, 2021Esperanza de Pedro, D. 2021. . :. (distribution); Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution). - As Xenoglossodes davidsoni: - Cockerell, 1935Cockerell, T.D.A. 1935. Some California bees (Continued from page 48). The Pan Pacific Entomologist 11 (2):49-54. (distribution); Cockerell, 1941Cockerell, T.D.A. 1941. Observations on plants and insects in northwestern Baja California, Mexico, with descriptions of new bees. Trans. San Diego Soc. Nat. Hist. 9 (31):337-352. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution).
Synhalonia hirsutior Cockerell, 1905:29, ♂. ♂, Banning, California (leg. Dr. A. Davidson); LaBerge, 2001LaBerge, W.E. 2001. Revision of the bees of the genus Tetraloniella in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36 (1-3):67-162.:141, Holotype ♂ (AMNH). - Cockerell, 1935Cockerell, T.D.A. 1935. Some California bees (Continued from page 48). The Pan Pacific Entomologist 11 (2):49-54.:53 ( listed as synonym of Xenoglossodes davidsoni (Cockerell, 1905)); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:2136 ( listed as synonym of Xenoglossodes davidsoni (Cockerell, 1905)); LaBerge, 2001LaBerge, W.E. 2001. Revision of the bees of the genus Tetraloniella in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36 (1-3):67-162.:139 ( listed as synonym of Tetraloniella davidsoni (Cockerell, 1905)). - As Tetralonia hirsutior: - Cockerell, 1906Cockerell, T.D.A. 1906. The North American bees of the family Anthophoridae. Transactions of the American Entomological Society 32 (1):63-116. (distribution); Cockerell, 1913Cockerell, T.D.A. 1913. Names applied to the Eucerine bees of North America. Proceedings of the United States National Museum 43:261-273. (distribution); Lutz & Cockerell, 1920Lutz, F.E. & T.D.A. Cockerell 1920. Notes on the distribution and bibliography of North American bees of the families, Apidae, Meliponidae, Bombidae, Euglossidae, and Anthophoridae. Bull. Amer. Mus. Nat. Hist 42 (15):491-641. (distribution).