Definition of "droshky"

Of late years, cabriolets, and English stanhopes, and tilburys, have been introduced into St. Petersburgh; but the real national carriage for the town is the Droshky.

1829, Augustus Bozzi Granville, St. Petersburgh, a journal of travels to and from that capital

Was Tchitcherine there at all? sitting back in the dingy room while the lift cables slapped and creaked through the walls, and down in the street, rarely enough to matter, a droshky rattled whip-snapping over these black old cobbles?

1973, Thomas Pynchon, Gravity's Rainbow