The beach flies of the Mascarene Islands (Diptera: Canacidae: Tethininae) Author Munari, Lorenzo c / o Entomology Section, Museo di Storia Naturale, S. Croce 1730, Venezia, Italy. Author Kirk-Spriggs, Ashley H. Senior Curator in Charge of Diptera and Siphonaptera, Department of Life Sciences, Natural History Museum, Cromwell Road, London SW 7 5 BD, United Kingdom. Author Mcgregor, Gillian K. Geography Department, Rhodes University, Grahamstown 6140, South Africa. text Zootaxa 2020 2020-09-22 4853 2 183 198 journal article 9109 10.11646/zootaxa.4853.2.2 665c72da-8a91-438a-ac00-4d39ce709306 1175-5326 4410564 5FCB7B3D-DE8C-441D-96A4-5B71D73415B1 Afrotethina aurisetulosa ( Lamb, 1914 ) Figs 13 , 22 , 25 , 30 . Distribution : Afrotropical : Kenya , Madagascar , Mascarenes ( La Réunion *, Mauritius *, Rodrigues *), Mozambique , Seychelles (Aldabra, Anonyme, Cosmoledo, Long, Mahé ). Oriental : Chagos. Material examined (all “A.H. Kirk-Spriggs & B.S. Muller, sweeping intertidal zone and coastal vegetation”, unless otherwise stated). La Réunion : 5♀ , St.-Paul , beach, 20°58′15″S , 55°16′56″E , 0–5 m , 21.x.2015 , A.H. Kirk Spriggs, sweeping intertidal zone ( 2♀ deposited LMC); 1♀ , St.-Pierre , Pointe de Pont , 21°20′51″S , 55°28′52″E , 0– 6 m , 13.xi.2015 , A.H. Kirk Spriggs, sweeping intertidal rocks and coral beach; 1♀ , Pointe de Tremblet , 21°17′34″S , 55°48′21″E , 0–9 m , 9.xi.2015 , M.J. Ebejer, general sweeping; intertidal zone & sandy beach (deposited MJEC). Mauritius : 3♀ , Black River , Le Morne Brabant , 20°27′32″S , 57°19′42″E , 1–3 m , 28.i.2018 ; 4♂ , 3♀ , Black River , Tamarin , 20°19′41″S , 57°22′33″E , 1–3 m , 28.i.2018 ; 2♂ , 3♀ , Flacq , Poste Lafayette , 20°07′02″S , 57°45′05″E , 1–3 m , 30.i.2018 ; 1♀ , Flacq , Troud’Eau Douce , 20°14′20″S , 57°47′34″E , 1–3 m , 27.i.2018 ; 1♀ , Grand Port , Grand Sable , 20°19′12″S , 57°46′12″E , 1–3 m , 27.i.2018 ; 6♂ , 12♀ , Pamplemousses , Le Goulet , 20°06′14″S , 57°31′02″E , 1–3 m , 30.i.2018 ( 1♂ , 1♀ deposited LMC) ; 1♂ , Pamplemousses , Tombeau Bay , 20°08′00″S , 57°29′54″E , 1–3 m , 30.i.2018 ; 1♀ , Pamplemousses , Trou aux Biches , 20°02′36″S , 57°32′14″E , 1–3 m , 29–30.i.2018 ; 1♀ , Rivière du Rempart , Bain Boeuf , 19°59′13″S , 57°36′12″E , 1–3 m , 30.i.2018 ; 2♀ , Rivière du Rempart , Grand Gaube , 20°01′00″S , 57°40′55″E , 1–3 m , 29–30.i.2018 ; 1♀ (cf.), Savanne , Bel Ombre , 20°29′32″S , 57°22′42″E , 1–3 m , 26.i.2018 ; 2♀ , Savanne , Riambel , 20°31′09″S , 57°30′25″E , 1–3 m , 26.i.2018 ; 6♂ , 6♀ , Savanne , Rivière des Galets, 20°30′04″S , 57°26′52″E , 1–3 m , 26.i.2018 ( 1♂ deposited LMC) . Rodrigues : 1♂ , 2♀ , Anse Ally , 19°41′42″S , 63°29′48″E , 1–3 m , 10.ii.2018 ; 2♂ , 1♀ , Anse Mourouk , 19°44′23″S , 63°27′53″E , 1–3 m , 10.ii.2018 ; 2♂ , 4♀ , Plaine Corail , 19°46′05″S , 63°22′36″E , 1–3 m , 9.ii.2018 ( 1♂ , 1♀ deposited LMC) ; 2♂ , 2♀ , Rivière Banane , 19°40′37″S , 63°28′30″E , 1–3 m , 10.ii.2018 ( 1♂ deposited LMC) (all deposited BMSA, unless otherwise stated). Comments : Originally described from Seychelles , this delicate, pale yellow beach fly was later recorded from the central-eastern coast of the Afrotropical Region, including Madagascar ( Munari & Mathis 2010 ) and from the remote Chagos Islands to the east ( Munari 2015 ). The species is recorded herein for the first time from the Mascarenes. Afrotethina aurisetulosa belongs to an endemic Afrotropical genus, which includes eight species of which A . martinezi Munari, 2005 is known so far exclusively from the southern Arabian Peninsula.