Na'kuhl

The Na'kuhl were a race of bat-featured humanoids with parchment-yellow skin.

By the 29th century, a faction of Na'kuhl utilised time travel to raid a Carreon ship in 2372 and steal a Deltan time perceptor. 

Another faction, or possibly the same one but from a different point in time or timeline, tried to eradicate the Suliban, then time-travelled to Earth 1944 and allied themselves with Nazi Germany.