Katydid, nymph

In my eyes more a Tettigoniidae, Katydid nymph, than a (true) cricket. I suggest that you use the "easy" and less confusing terms: katydid for tettigoniidae, grasshopper for for example Acrididae (short-horned grasshopper) and cricket for the true crickets or Gryllidae. Katydids are in the UK called bush crickets and sometimes also long-horned grasshoppers, so there might be some confusion with other (true) grasshoppers or crickets. However, all are actually Orthoptera, so from the same order.