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Mating behavior was studied in S. charlottae and S. emiliae cave Bathysciinae. Actions of the male vary with the species. S. charlottae rubs the female abdomen with his mesothoracic legs whereas his abdomen is motionless; S. emiliae performs many antero-posterior abdominal movements, very strong at the beginning, then weaker. Concerning the duration of copulations in S. charlottae species, long or short matings occur, without a regular rythm. Among Bathysciinae, behavioral data permit a taxinomic discrimination and may show the relation-ships between species.