An annotated checklist of the Diptera of the Galápagos Archipelago (Ecuador) Author Sinclair, Bradley J. 0000-0001-6413-1606 bradley.sinclair@inspection.gc.ca text Zootaxa 2023 2023-05-09 5283 1 1 102 http://dx.doi.org/10.11646/zootaxa.5283.1.1 journal article 30017 10.11646/zootaxa.5283.1.1 02c7ce64-10d5-4a88-9844-0570c9a54e54 1175-5326 7912667 FFACFB44-873F-4C12-90CF-D8442910659A agonis (Walker) Syrphus agonis Walker, 1849: 588 . Williston 1887: 28 [catalogue]; Van der Goot 1964: 215 [records]. Rhysops agonis : Linsley 1977: 39 [checklist]; Thompson et al . 1976: 42 [catalogue]. Argentinomyia agonis : Sinclair et al . 2016: 85 [review]; Marín-Armijos et al . 2017: 168 [checklist]; Montoya & Wolff 2023: 25 [revision]. ? Xanthandrus sp. : Curran 1934: 155 [records]. Distribution. Endemic. Galápagos: Floreana, Isabela, Pinta, San Cristóbal , Santa Cruz. Remarks. Adults of this species were collected in the pampa zone surrounding Sierra Negra on Isabela . Adults have been observed visiting flowers of Miconia ( Boada 2005 ) . Curran (1934: 155) listed an undetermined species of Xanthandrus from Pinta. Unfortunately, this specimen could not be found to confirm its identity. Hence, whether this undetermined specimen was truly Xanthandrus or Argentinomyia agonis remains unknown.