New species of Centris (Xanthemisia) Moure from the Mesoamerican Dominion and the Mexican Transition Zone (Hymenoptera: Apidae) Author Vivallo, Felipe HYMN Laboratório de Hymenoptera, Departamento de Entomologia, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, São Cristóvão 20940 - 040 Rio de Janeiro, RJ, Brazil. Author Vásquez-Lenis, Elder A. Instituto de Ecología A. C., Red de Diversidad Biológica del Occidente Mexicano, Centro Regional del Bajío, Pátzcuaro, Michoacán, Mexico, 61600. Author Mérida-Rivas, Jorge A. El Colegio de la Frontera Sur (ECOSUR), Departamento Agricultura Sociedad y Ambiente, San Cristóbal de Las Casas, Chiapas, Mexico, 29290. text Zootaxa 2023 2023-09-27 5351 3 341 355 http://dx.doi.org/10.11646/zootaxa.5351.3.3 journal article 10.11646/zootaxa.5351.3.3 1175-5326 8391716 9E744C2E-1E06-4C04-AF3E-25BD5A7B1BAA Key for the species of Centris ( Xanthemisia ) occurring in the Mesoamerican Dominion and the Mexican Transition Zone *The male of C . maya sp. nov. is currently unknown. 1 Females ............................................................................................ 2 - Males.............................................................................................. 5 2 Mesoscutum covered by intense yellow pubescence ( Figs. 2 , 10 ). Distal terga and sterna with blackish hairs, including fimbriae ( Figs. 4 , 12 ). F1 longer than F2‒F4 together ( Figs. 1 , 5 )....................................................... 3 - Mesoscutum with blackish pubescence. Distal terga and sterna with light yellowish brown, golden brown or yellow hairs. Fimbriae orange or yellow. F1 slightly shorter than F2‒F4 together ( Fig. 13 )...................................... 4 3 Clypeal surface strongly coriaceous, with coarse and dense punctation on disc, sparser near upper margin ( Fig. 9 ). T4 with fine and dense punctation on anterior half, scattered towards distal margin ( Fig. 12 ). Central area of the epistomal suture almost as arched as the central lower margin of clypeus ( Fig. 9 ). Primary basitibial plate elliptical; secondary relatively rhomboidal ( Fig. 11 )............................................................................... Centris maya sp. nov. - Clypeal surface coriaceous, with coarse and dense punctation at lateral sides; disc shiny with an irregular perpendicular unpunctated area in the middle ( Fig. 1 ). T4 with relatively uniform punctation, except at distal margin ( Fig. 4 ). Central area of the epistomal suture more arched than the central lower margin of clypeus ( Fig. 1 ). Basitibial plates relatively rhomboidal with rounded lateroinferior margins ( Fig. 3 )................................................ Centris jakalteka sp. nov. 4 Clypeus dark reddish brown. Lower paraocular area and labrum with whitish hairs. Mesoscutellum and fimbriae with yellow pubescence.................................................................. Centris carolae Snelling, 1966 - Clypeus blackish ( Fig. 13 ). Lower paraocular area and labrum with blackish hairs ( Fig. 13 ). Mesoscutellum with blackish pubescence ( Fig. 14 ). Fimbriae orange ( Figs. 14, 16 )................................... Centris purhepecha sp. nov. 5 Mesoscutum with dark brown to black pubescence ( Fig. 17 ). Second and third mandibular teeth separated from the first tooth by a gap............................................................................................ 6 - Mesoscutum with intense yellow pubescence ( Figs. 6, 8 ). Metasoma covered mainly by blackish hairs ( Fig. 8 ). Second and third mandibular teeth not separated from the first tooth by a gap ( Fig. 7 )..................... Centris jakalteka sp. nov. 6 Mesoscutellum with yellow pubescence. Metasoma covered mainly by golden hairs........ Centris carolae Snelling, 1966 - Mesoscutellum with blackish pubescence ( Fig. 18 ). Metasoma with blackish hairs on anterior terga; apical segments with yellow pilosity ( Fig. 18 ).......................................................... Centris purhepecha sp. nov.