aenescens Thomson

Olfersia aenescens Thomson, 1869: 610 . Bequaert 1957: 438 [records]; Linsley & Usinger 1966: 173 [checklist]; Guimar„es 1968: 7 [catalogue].

Pseudolfersia diomedae Coquillett, 1901a: 379 . Bequaert 1957: 437 [as syn. of O. aenescens]; Maa 1963: 29, 124 [as syn. of O. aenescens].

Olfersia diomedae: Curran 1932: 366 [record].

Olfersia erythropsis Bigot, 1885: 239 . Bequaert 1933: 133 [records]; Bequaert 1957: 438 [as syn. of O. aenescens].

Distribution. Native. Pantropical (Atlantic, Indian and Pacific Oceans); Galápagos: Española, Genovesa (MONZ), Isabela, Marchena (ICCDRS), Rábida (MONZ), Santa Cruz, Seymour.

Remarks. This species is a parasite of oceanic fish-eating birds, including boobies ( Sula Brisson) and albatross ( Diomedea L.) (Bequaert 1957). Adults of this species have also been recorded on swallow-tailed gulls ( Creagrus furcatus (Neboux)) and lava gulls ( Leucophaeus fuliginosus (Gould)) (MONZ) .