Trophic relations of the Lycaenidae 47 species with 13 families of the flowering plants in the steppe zone of Ukraine were ascertained. Most species of the Lycaenidae are trophically related with the Fabaceae family. We have partitioned three types of the caterpillar’s feeding nature: 1) feeding on flowers with a transition to seeds; 2) at first feeding on flowers, but then – on leaves; 3) feeding only on leaves.