Cercus (pural cerci): paired appandages at the end of the abdomen, their form is especially important for identification of male bush-crickets (fig. 3)

Chorthippus lobe: a small widening on the outer (lower) margin of the fore wing by some species of grasshoppers. It's rather hard to see in the field, but sliding a white sheet of paper behind the wing helps. (fig. 4)

Medial field: an area in the middle of the fore wings.

Ovipositor: a tube-like organ for the laying of eggs, conspicous at (bush-)crickets, but reduced in size at grasshoppers (fig. 1 and 3)

Palpi: appendages attached to the oral part and serving as an organ of sense (fig. 1 and 2)

Pronotum: a shield which covers the thorax from above and on the sides. It can be very important in the identification of the insect (fig. 1 and 2)

Stigma: a group of cells in the fore wing with a distinctive colouration (fig. 4)

Subgenital plate: the plate covering the end of the abdomen on the belly-side. Its form can be a distinctive feature of some species. (fig. 3)

Tympanum: the opening of the hearing organ. It can be found on the side of the abdomen of grasshoppers and on the fore legs of crickets and bush-crickets. (fig. 2)