If you want to know whether that sentence is punctuated correctly, then you are right - it is. You need to have a comma after the word range, because that is where the dependent clause ends, and there should be no comma before the conjunction and.
The Abame oracle says that white men will come like locusts and that they will spread destruction. The meaning of this is that, just like locusts do, white men will bring no good to the village.
