Ithenite

The Ithenites were a member race of the United Federation of Planets, characterized by their relatively short stature and copper-colored skin. First contact between humans and Ithenites was made sometime before 2154. 

And Ithenite delegation travelled aboard the USS Enterprise (NCC-1701) in 2267 to a conference on Babel. 

In an alternate timeline, the Ithenites were members of the Interstellar Coalition, and attended the conference on Babel to discuss Earth's admittance to that body in 2264. 


 * According to Memory Alpha, an Ithenite ambassador was to have appeared in the ENT episode "Terra Prime," but the scene was cut.