Specimens of Cletocamptus retrogressus Schmankewitsch, 1875 were collected
in the Rhone delta, Camargue, from irrigation and drainage ditches containi
ng water of fluctuating degrees of salinity. Thus far, the species, recorde
d from many European, African and Asian localities, has been presented only
deficiently; in this paper it is redescribed and figured, including the se
xualdimorphic rostrum and the mostly neglected mouth parts.