Bathycranium : synonymised with Syntormon, distinction between Parasyntormon and Syntormon discussed and S. bicolorellus and S. luteicornis (Diptera : Dolichopodidae) redescribed

I t is demonstrated that there is no valid basis on which to sustain the monotypic genus Bathycranium Strobl and concluded that Bathycranium should be recognised as a junior synonym of Syntormon h e w (new status). The species Syntormon bicolorellus Zetterstedt (new combination) falls into a natural grouping of Syntormon species with downcurved facial hairs in females. This species and S. luteicornis Parent are redescribed. Distinctions between Syntormon and Parasyntormon are discussed. Sommaire: Aucune base valable ne soutient le genre Bathycranium Strobl e t i len ressort que Bathycranium doit Btre reconnu comme synonym junior de Syntormon h e w (n. stat.). L'espGce Syntormon bicolorellus Zetterstedt (n. comb) appartient A un groupement nature1 d'espdces de Syntormon munies de soies faciales pendantes chez les femelles. Cette espdce, ainsi que S. luteicornis Parent, sont redecrites. Les distinctions entre Syntormon et Parasyntormon sont passees en revue.