sordida Bigot

Olfersia sordida Bigot, 1885: 239 . Bequaert 1957: 471 [records]; Guimar„es 1968: 8 [catalogue]; Maa 1969: 284 [checklist].

Pseudolfersia fossulata of authors (misidentification): Coquillett 1901a: 379 [record].

Olfersia fossulata of authors (misidentification): Johnson 1924: 91 [record]; Curran 1932: 366 [record]; Bequaert 1933: 132 [remarks]; Linsley & Usinger 1966: 173 [checklist]; Bequaert 1957: 470 [as syn. of O. sordida].

Distribution. Native. Neotropical; Galápagos: Daphne Major, Fernandina (CDRS), Genovesa, Rábida, Santa Cruz, Santiago, Wolf.

Remarks. This species commonly occurs as parasites on marine fish-eating birds (Bequaert 1957; Whiteman et al. 2006). In the Galápagos, adults have been found on flightless cormorants and pelicans (Harmon et al. 1984 –85; Whiteman et al. 2006).