Short-horned Grasshopper

These two grasshoppers appear to be nymphs, because although they look very robust and heavily built, they only have small stubs of wings which are just starting to grow. I can't give much of a description, other than what can be seen in the photos. They are very dark brown (or black, depending on the angle of the light), but the pictures show just a glimpse of white markings on the inside surfaces of the rear femora and maybe also on the tibiae.