I’m not sure whose ethnic dress features the conical hats, but the fact that the artist for these drawings is Kindinov, who is Russian, may be a clue to the setting of these public punishment artworks:
Don’t forget to click the images for uncropped versions.
"...the girls are prepared in the reformatory’s punishment room, naked, lying on their backs on special benches, bound with their legs spread above their heads, shamefully showing the two holes usually hidden..."