---

Females of Geomyza hackmani normally have a largely black abdomen, not this banded patern, but I have seen exceptions to this rule. Also Geomyza hackmani normally has a much darker subscutellum. So this all seems to point in the directlon of Geomyza balachowskyi. To be entirely sure you would have to study sternite 8 which is retracted.

Considering what is visible this is almost certainly a female of Geomyza balachowskyi.