For the following reasons, C.xanthostoma (Charp.) should be considered a good species: (1) Its wing colour pattern is stable. All previously stated cases of intermediates with splendens splendens are splendens or caprai, not xanthostoma; (2) The coloured wing spot appears only a few days after emergence. In splendens, including the “intermediates”, it is present from the beginning; (3) Where both species share the same area, there is a difference in habitat selection; (4) The colour of the ventral part of the ultimate abdominal segments is yellowish in xanthostoma, whitish in splendens (HEYMER, 1971b). This is an important character in reproductive isolation, probably as important as the wing spot itself; (5) The geographical area inhabitated lies greatly outside that of C.splendens and subspecies and is closed. It is the same area as the one occupied by a number of dragonflies, the specificity of which has never been challenged and that are very characteristic of it.