The one near the bridge is the ghost locust, right? One of them is in the NW of that big field area, the other is at the inside of the southern gate arc of the bridge.
The female snail near the Temple of Time is in the upper area with the gate leading to the temple, I think somewhere to the front and right, around where you push the crate down that allows you to go from the lower area that has the gate to the Master Sword pedestal to the upper area where the gate to the Temple is.
EDIT: Ah, nonsense, the female snail is in the entrance area between the gate through time and the temple of time, on the right side of the stairs you come down from the gate, IIRC
Note that I have the unmirrored version of TP, if you have the mirrored you have to switch the sides obviously.