The biology of leaf mining Agromyzidae living on Lonicera periclymenum L., Lonicera xylosteum L. and Symphoricarpos rivularis Suksdorf was studied in the surroundings of Kiel (Schleswig-Holstein, FRG). An identification key is given for the 5 Agromyzid species occurring in the investigation area, Paraphytomyza cornigera Griffiths, P. hendeliana (Hering), P. luteoscutellata (De Meij.), Phytomyza periclymeni De Meij. and P. lonicerae (Rob.-Desv.). Observations were made on the phenology and feeding behavior of these species, their abundances, host and biotope specificity, as well as temporal and spatial segregation. Ecological segregation is particularly discussed in relation to host-plant chemistry. 13 parasitic Hymenoptera species of the families Braconidae and Eulophidae were reared from the 5 Agromyzid hosts investigated.