B. histrionica, B. rostrata, B. almorhae, and B. kubotai all look relatively similar when they are quite small. How big is this loach? Given that the bands extend onto the caudal fin, I'd say B. histrionica, but that is a guess.
If the loach is still small (I assume it is), then it may be a game of wait and see.
Good point, Adamrf1126. It could also be B. dario. I think the point is that you should keep this little fish and feed it up and post more photos as you go.
The colors should brighten up once he settles in. Let him get comfortable and then you'll have a better idea. Even then, though, it's a crap shoot until he/she get's a bit older.
Do you have any other similar species or is he the lone botia?