The insects of this genus are all North American and are strikingly distinct from all other forms in this region in their almost hemispherical outline and leathery opaque elytra. Although they jump with great agility, when seen strutting about on their broadly foliaceous legs they appear awkward and grotesque in the extreme. They rest on the stems of the shrubs head upwards and the body inclined outwards at about a 30-degree angle.