A revision of the new world species of Polytrichophora Cresson and Facitrichophora, new genus (Diptera, Ephydridae)

Abstract. The New World species of Polytrichophora Cresson and Facitrichophora new genus, are revised. Fifteen new species are described (type locality in parenthesis): Facitrichophora atrella sp. n. (Costa Rica. Guanacaste: Murciélago [10°56.9'N, 85°42.5'W; sandy mud flats around mangrove inlet]), Facitrichophora carvalhorum sp. n. (Brazil. São Paulo: Praia Puruba [23°21'S, 44°55.6'W; beach]), Facitrichophora manza sp. n. (Trinidad and Tobago. Trinidad. St. Andrew: Lower Manzanilla (12 km S; 10°24.5'N, 61°01.5'W), bridge over Nariva River), Facitrichophora panama sp. n. (Panama. Darien: Garachine [8°04'N, 78°22'W]), Polytrichophora adarca sp. n. (Barbados. Christ Church: Graeme Hall Nature Sanctuary [13°04.2'N, 59°34.7'W; swamp]), Polytrichophora arnaudorum sp. n. (Mexico. Baja California. San Felipe [31°01.5'N, 114°50.4'W]), Polytrichophora barba sp. n. (Cuba. Sancti Spiritus: Topes de Collantes [21°54.4'N, 80°01.4'W, 670 m]), Polytrichophora flavella sp. n. (Peru. Madre de Dios: Rio Manu, Pakitza [11°56.6'S, 71°16.9'W; 250 m]), Polytrichophora marinoniorum sp. n. (Brazil. Paraná: Antonina [25°28.4'S, 48°40.9'W; mangal]), Polytrichophora rostra sp. n. (Peru. Madre de Dios: Rio Manu, Pakitza [11°56.6'S, 71°16.9'W; 250 m]), Polytrichophora sinuosa sp. n. (Trinidad and Tobago. Trinidad. St. Andrew: Lower Manzanilla [12 km S; 10°24'N, 61°02'W]), Polytrichophora mimbres sp. n. (United States. New Mexico. Grant: Mimbres River [New Mexico Highway 61 & Royal John Mine Road; 32°43.8'N, 107°52'W; 1665 m]), Polytrichophora salix sp. n. (United States. Alaska. Matanuska-Susitna: Willow Creek [61°46.1'N, 150°04.2'W; 50 m]), Polytrichophora sturtevantorum sp. n. (United States. Tennessee. Shelby: Meeman Shelby State Park [Mississippi River; 35°20.4'N, 90°2.1'W; 98 m]), Polytrichophora prolata sp. n. (Belize. Stann Creek: Cockscomb Basin Wildlife Sanctuary [16°45'N, 88°30'W]). All known New World species of both genera are described with an emphasis on structures of the male terminalia, which are fully illustrated. Detailed locality data and distribution maps for all species are provided. For perspective and to facilitate recognition, the tribe Discocerinini is diagnosed and a key to included genera is provided.