Ericrocis arizonensis Baker, 1906:143 - Cockerell, 1923Cockerell, T.D.A. 1923. Expedition of the California Academy of Sciences to the Gulf of California in 1921. The bees (I). Proceedings of the California Academy of Sciences ser. 4: v. 12 (7):73-103. (distribution); Cockerell, 1925Cockerell, T.D.A. 1925. Bees in the collection of California Academy of Sciences. Proceedings of the California Academy of Sciences 14 (11):185-215. (distribution); Linsley, 1939Linsley, E. G. 1939. A revision of the Nearctic Melectinae (Hymenoptera, Anthophoridae). Annals of the Entomological Society of America 32:429-468. (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).
Ericrocis melectoides Baker, 1906:144 - Cockerell, 1923Cockerell, T.D.A. 1923. Expedition of the California Academy of Sciences to the Gulf of California in 1921. The bees (I). Proceedings of the California Academy of Sciences ser. 4: v. 12 (7):73-103. (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.:2176 ( listed as synonym of Ericrocis arizonensis Baker, 1906).