The bees of the genus Centris Fabricius, 1804 described by Theodore Dru Alison Cockerell (Hymenoptera: Apidae) Author Vivallo, Felipe text European Journal of Taxonomy 2020 2020-03-19 618 1 47 journal article 10.5852/ejt.2020.618 eb3e0d4d-e623-4c58-ab31-9833367933bd 3722950 FB1B58E6-7E40-4C16-9DFF-2EA5D43BC0B3 Centris ferrisi Cockerell, 1924 Centris atripes ferrisi Cockerell, 1924: 49 . Type data This species was described based on two male specimens collected by Gordon Floyd Ferris on June 29, 1919 , at La Paz, Mexico . Ferris ( 1893–1958 ) was an American entomologist specialist on ‘small insects’, like lice, parasitic flies and small blood-sucking Hemiptera ( Usinger 1959 ) . In 1919, he made an extensive field trip to Baja California with the American herpetologist Joseph Richard Slevin ( 1881–1957 ), where both males studied by Cockerell (1924) were collected. In the original description, Cockerell (1924) did not indicate which male was the holotype , and he also failed to indicate the sex of the exemplars, citing that they were two females. Snelling (1984) recognized the latter mistake and corrected the sex of the specimens. According to Cockerell (1924) , Snelling (1984) and Moure et al. (2007) , the type specimens are housed at CAS , but actually they are in the NMNH . One of the males bears a label of “type” and the other was labeled as “cotype”. The holotype has the following data label: [grey label] La Paz, Baja Calif., Mex. June 29, 1919 G. F. Ferris. [printed]\ Centris atripes ferrisi Ckll Type [handwritten]\ California Academy of Sciences Type No. [printed] 2729 [handwritten]. The male paratype has the following data label: [grey label] La Paz, Baja Calif., Mex. June 29, 1919 G. F. Ferris. [printed]\ Centris atripes ferrisi Ckll Cotype [handwritten]\ [red label] Paratype [printed] 54875 [handwritten] USNM [printed]\ C. ( Penthemisia ) ferrisi Ckll [handwritten] Det. J.S.Moure 19 [printed] 57 [handwritten]\ for me a good species Moure 57. Type locality Mexico : Baja California Sur State : La Paz. Comments According to Moure et al. (2007) , this species occurs only in the Mexican States of Baja California and Baja California Sur .