Fig. 1a. Map of the distribution of the grasshoppers of the Ch. albomarginatus-group in Europe. Selected zone is shown in more detail in figure 1b.	Fig. 1b. Contact zone between Ch. albomarginatus and Ch. oschei in the Ukraine and Moldova. Green rectangles - populations of Ch. albomarginatus, yellow - populations of Ch. oschei, grey - hybrid populations.