Loyolanthidium gen. n. e três espécies novas neotropicais (Hymenoptera, Megachilidae)

Loyolanthidium gen. n. (type species: Anthidium apicale Cresson, 1878) is proposed to accommodate the western hemisphere species hitherto placed by the authors in Anthidiellum Cockerell, 1904. Three new species are described: Loyolanthidium bolivianum sp. n. (from Bolívia), Loyolanthidium azteca sp. n. and Loyolanthidium xilitlense sp. n. (both from México). The following nomenclatural changes are introduced: Loyolanthidium apicale (Cresson, 1878) comb. n. = Anthidium albopilosum Friese, 1910 syn. n. = Anthidium auricolle Friese, 1921 syn. n.; Loyolanthidium ehrhorni (Cockerell, 1900) comb, n.; Loyolanthidium gilense (Cockerell, 1897) comb, n.; Loyolanthidium notatum (Latreille, 1809) comb, n.; Loyolanthidium perplexum (Smith, 1854) comb, n.; Loyolanthidium robertsoni (Cockerell, 1904) comb. n. and Loyolanthidium toltecum (Cresson, 1878) comb. n