"American Insects: A Handbook of the Insects of America North of Mexico"
(1), p. 171:
Most species of this subfamily, as may be deduced from the common name, have brightly colored hind wings with a marginal or sub-marginal band. The pronotum usually has a median keel. A few species have clear hind wings. Many make crackling, buzzing, or ticking sounds when they fly (crepitate). A "prosternal spur" is absent between the bases of the front legs. Otherwise they resemble some of the
Spur-throated Grasshoppers. From similar Slant-faced Grasshoppers (Gomphocerinae) that don't have a slanted face, they differ in usually having colored wings and in having stridulatory pegs on the front wings (tegmina) instead of on the inside of the hind femur.
