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Most probably X. dives, X. pedissequum does not have such black hind legs. In X. stackelbergi the shape of the yellow spots on tergite 2 is different. The shape of the black frontal stripe also fits X. dives. To be sure, a good picture of the wings and the lateral thorax is necessary. See the descriptions in https://repositor...27-036.pdf; the pictures are understandable even if you don't understand Dutch.
Regards, Sundew