Charlie

several villages named Bukowina in Poland. There was also an historical region Bukowina/Bukovina.
http://users.erols.com/mwhite28/austhung.htm

http://www.bukovinasociety.org/
www.halgal.com

Feduszka, Iwan Lokie, Galicia 23 1887 1910
Feduszka, Kataryna 20 1886 1906
Feduszka, Mikolaj Welykie 27 1878 1905
Feduszka, Nasko Welyre, Austria 10 1902 1912
Feduska, Michal Weleki 18 1888 1906
Feduska, Mikolaj Mslykic 26 1878 1904
Fedusko, Stefan Welykie, Aust 36 1872 1908
Anyone of the above related to your ancestor?
www.ellisislandrecords.org

Have you tried locating his arrival manifest? Was he naturalized citizen? His SS-5Form might contain his place of birth.

tidbit:
in Poland: http://www.moikrewni.pl/mapa/kompletny/feduszka.html
http://www.moikrewni.pl/mapa/kompletny/feduszko.html
http://www.moikrewni.pl/mapa/kompletny/skiba.html