Abstract
A revision of the Dixidae of Costa Rica indicates that 10 named species of Dixella are present, eight of which are described as new (described stages indicated): D. fernandezae (%), D. hansoni (%), D. hernandezi (%), D. jironi (%), D. lobata (%, &), D. maculata (%, &), D. suzukii (%, &), D. woodi (%). Two named species were previously known from Costa Rica: D. shannoni Lane (%, &) and D. venezuelensis Lane (%, &). A key to the species of Costa Rica is provided and other similar Neotropical species discussed. An overview of all Central American species is given. Five of the 10 Costa Rican species were collected above 1200 meters in elevation, indicating that further collecting, especially at high elevations will reveal further species. Five additional species from Costa Rica remain unnamed because they are represented only by females. A total of 15 species of Dixella are therefore present in this country.
References
Borkent, A. & Bissett, B. (1990) A revision of the Holarctic species of Serromyia Meigen (Diptera: Ceratopogonidae). Systematic Entomology, 15, 153–217.
Chandler, P. (Ed.) (1998) Checklists of insects of the British Isles (New Series). Part 1: Diptera (incorporating a list of Irish Diptera). Handbooks for the Volume 12 Identification of British Insects. Royal Entomological Society, xx + 234 pp.
Edwards, F.W. (1932) Diptera family Culicidae. Genera Insectorum, 194, 1–258.
Heinemann, S.J. & Belkin, J.N. (1977) Collection records of the project “Mosquitoes of Middle America”. 7. Costa Rica. Mosquito Systematics, 9, 237–287.
Heinemann, S.J. & Belkin, J.N. (1978) Collection records of the project “Mosquitoes of Middle America”. 10. Panama, including Canal Zone (PA, GG). Mosquito Systematics, 10, 119–196.
Holdridge, L.R. (2000) Ecologia basada en zonas de vida. San José, Instituto Interamericano de Cooperación para la Agricultura, 5th ed. 216p.
Lane, J. (1942) Dixinae e Chaoborinae. Révisão das espécies neotropicas (Diptera, Culicidae). Revista de Entomologia, 13, 81–148, pls. 1–4.
Lane, J. (1953) Neotropical Culicidae. Volume 1. University of São Paulo, Brazil. 548 pp.
McAlpine, J.F. (1981) 2. Morphology and terminology—adults. pp. 9–63 In Manual of Nearctic Diptera. Volume 1. Agriculture Canada Monograph 27. 674 pp.
Peters, T.M. (1980) A new species of Dixella (Diptera: Dixidae) from Honduras, Central America. Proceedings of the Entomological Society of Washington, 82, 681–684.
Peters, T.M. (1981) A new Nearctic Dixa (Diptera: Dixidae). Proceedings of the Entomological Society of Washington, 83, 516–519.
Peters, T.M. (1987) A new Nearctic species of Dixa (Diptera: Dixidae) from Pennsylvania. Proceedings of the Entomological Society of Washington, 89, 137–140.
Peters, T.M. & Barbosa, P. (1970) A new Nearctic species of Dixinae (Culicidae: Diptera). Entomological News, 81, 11–17.
Peters, T.M. & Cook, E.F. (1966) The Nearctic Dixidae (Diptera). Miscellaneous publications of the Entomological Society of America, 5, 231–278.
Tosi, J.A. (1969) Mapa ecológico de Costa Rica: según la clasificación de zonas de vida para el mundo de L.R. Holdridge. Map 1:750,000. Centro Científico Tropical.