Cloudless Sulphur -- Phoebis sennae

@sherri: Well, this one is actually a butterfly. Katiydids are more like green grasshoppers here.

@Linda: Catching the sulphurs with wings open is rare in my location. This particular one preferred to flit around rather than land and this was my only opportunity to get a photo. When not backlit the wings are a greenish yellow, thus the name sulphur. (I didn't get this one with its wings open.)

@Marilla: Seen with the light shining on it rather than through it, it is yellow!