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Six new species of limoniid flies (Diptera: Limoniidae) are described from Tanzania, Trichotrimicra mbeya, sp.n., Trichotrimicra odontocera, sp.n. (subfam. Chioneinae), Hexatoma (Eriocera) njombensis, sp.n., Medleromyia tanzanica, sp.n., Pilaria morogoroensis, sp.n. (subfam. Limnophilinae), and Elephantomyia (Elephantomyia) catarractes, sp.n. (subfam. Limoniinae). Thirteen species are recorded as new to the fauna of Tanzania. A new combination is established, Ellipteroides (Ellipteroides) difficilis (Alexander, 1920) (= Limnophila (Limnophila) difficilis Alexander, 1920), comb.n. Males of Orimarga (Orimarga) mashonensis Alexander, 1959 and Ellipteroides (Ellipteroides) difficilis (Alexander, 1920), comb.n. are described for the first time, male terminalia are illustrated. РЕЗЮМЕ. Шесть новых видов комаров-лимониид (Diptera: Limoniidae) описаны из Танзании: Trichotrimicra mbeya, sp.n., Trichotrimicra odontocera, sp.n. (подсем. Chioneinae), Hexatoma (Eriocera) njombensis, sp.n., Medleromyia tanzanica, sp.n., Pilaria morogoroensis, sp.n. (подсем. Limnophilinae), и Elephantomyia (Elephantomyia) catarractes, sp.n. (подсем. Limoniinae). Тринадцать видов впервые указываются для фауны Танзании. Установлена новая комбинация, Ellipteroides (Ellipteroides) difficilis (Alexander, 1920) = Limnophila (Limnophila) difficilis Alexander, 1920, comb.n. Впервые описаны самцы Orimarga (Orimarga) mashonensis Alexander, 1959 и Ellipteroides (Ellipteroides) difficilis (Alexander, 1920), comb.n., даны иллюстрации терминалий самцов. Introduction Fifty-one species of limoniid flies have been recorded from Tanzania so far [Oosterbroek, 2016], mostly through the efforts of Charles P. Alexander who published an extensive study of the crane-flies collected by the Ruwenzori Expedition of the British Museum of Natural History in 1934–35 [Alexander, 1956]. This number shows that crane-flies are being vastly undercollected in Tanzania which is true for most tropical countries of the world. The author had an opportunity to examine specimens of limoniid flies collected by Nikita E. Vikhrev in Tanzania in December, 2015; this resulted in the discovery of three species new to science which are described below. Numerous specimens collected by the author in Tanzania in September, 2012 (yet only partially examined) contained three more species new to science, their descriptions also are given below. Additionally, this material included more species representing new records for the fauna of Tanzania. Material and methods The morphological terms used here mainly follow McAlpine [1981], venation is described mostly after Alexander and Byers [1981]. Male genitalia were boiled in 10% solution of potassium hydroxide (KOH) for 60 to 90s, neutralised by a 10% solution of acetic acid (CH3COOH), rinsed in water and then stored in glycerol. Dissected male genitalia were examined with a Nikon SMZ645 binocular microscope and then photographed using an eTREK DCM900 camera on MBI-1

Six new species of limoniid flies (Diptera: Limoniidae) from Tanzania and notes on other species new to the country’s fauna