[Ecology of the ceratopogonids of the Alsace plain. II. Spatial distribution of Culicoides larvae in a fluvial breeding-place (author's transl)].

The conditions of larval life of Culicoides in a mud-bank near a river are studied. Pedological and physical characteristics are measured. The distribution of species in regard to the saturation rate is following: C. clastrieri : 45 to 100 % of saturation (max. : near 100 %), C odibilis : 85 to 100 % (max. : 97-99 %), C. cubitalis : 45 to 100 % (max. : 85 %), C musilator : 85 to 100 % (max. : 95 %), C. subfascipennis : 85 to 99 %, C. pumilus : 45 to 85 % (max. : 45 %).