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The literature on Sri Lankan   Diopsidae   is reviewed. Eight   Diopsidae   are now known to occur in Sri Lanka, five species in the genus    Teleopsis    and one species each in the genera    Sphyracephala   ,    Diopsis   , and    Cyrtodiopsis   . The presence of    Cyrtodiopsis    requires confirmation to exclude the possibility of mislabelling. All five    Teleopsis    species are endemic, as are the    Diopsis    species and probably the    Cyrtodiopsis    species. Only    Sphyracephala   bipunctipennis    Senior-White has a larger distribution as it also occurs in India. A key is presented for the   Diopsidae   of Sri Lanka. Three    Teleopsis    species were already known to occur in Sri Lanka:    T.   ferruginea    Röder,    T.   krombeini    Feijen and    T.   maculata    Feijen. These species form the    T.   ferruginea    species group. Two new species are now described for this group:    Teleopsis   neglecta    sp. nov.  and    Teleopsis   sorora    sp. nov.    Teleopsis   ferruginea    is redescribed, as an earlier redescription turned out to be based on a series of specimens of its sister species    T.   sorora    sp. nov.  The other three   Diopsidae   of Sri Lanka are listed and illustrated. Allometric aspects of the five    Teleopsis    species are discussed. Three    Teleopsis    species are sexually dimorphic with regard to eye span, while two species are monomorphic. It is assumed that sexual dimorphism developed independently in the    T.   ferruginea    species group. This brings the number of known cases of independent development of sexual dimorphism in the   Diopsidae   to ten.

zookeys

A revision of the genus    Teleopsis    Rondani (  Diptera  ,   Diopsidae  ) in Sri Lanka with descriptions of two new species and a review of the other stalk-eyed flies from the island