Tijdschrift voor Entomologie 156 (2013) 127–139 brill.com/tve Hybotidae of the Galápagos Islands (Diptera: Empidoidea: Tachydromiinae) Bradley J. Sinclair & Jeffrey M. Cumming Three genera (Isodrapetis Collin, Chersodromia Walker, Elaphropeza Macquart) and six species of Tachydromiinae (Hybotidae) are recorded from the Galápagos Islands. One new species of Isodrapetis (I. meridionalis sp. n.)andthreenewspeciesof Chersodromia (C. floreana sp. n., C. galapagensis sp. n., C. isabela sp. n.)are described. Elaphropeza zonalis (Curran) is redescribed and a fourth species of Chersodromia is identified based on a single female specimen. A key to all Galápagos species is provided. Isodrapetis is recorded for the first time outside of New Zealand. The affinities of the Galápagos Tachydromiinae to the New World fauna are discussed. Keywords: Galápagos Islands, Neotropics, Hybotidae, Empidoidea, Elaphropeza, Chersodromia, Isodrapetis, new species. Bradley J. Sinclair*, Canadian National Collection of Insects and Ottawa Plant Laboratory – Entomology, CFIA, K.W. Neatby Bldg., C.E.F., 960 Carling Ave., Ottawa, ON, K1A OC6, Canada.
[email protected] Jeffrey M. Cumming, Invertebrate Biodiversity, Agriculture and Agri-Food Canada, K.W. Neatby Bldg., C.E.F., 960 Carling Ave., Ottawa, ON, K1A OC6, Canada.
[email protected] Introduction datazone.darwinfoundation.org/terrestrial-inverte Knowledge of the Diptera of the Galápagos Islands brates/diptera/. has progressed tremendously over the past 20 years, The empidoid flies that are known to occur on facilitated primarily on the basis of specimens from the Galápagos Islands include the Dolichopodidae, the arthropod surveys of 1985–1996 organized and previously treated by Bickel & Sinclair (1997), and directed by Stewart Peck (Peck 2001, 2006; Sin- the Hybotidae.