| body |
| large (males 35-81 mm, females 38-107 mm), cylindrical or subcylindrical, in males greatly inflated (probably specialization for sound propagation) | medium-sized (males 11.5-22.5 mm, females 22-39 mm), laterally compressed, not inflated in males |
| face in profile |
| straight, slightly inclined | slightly excurved and inclined |
| development of wings |
tegmina in males fully developed (left), in females shortened or strongly shortened and hidden under pronotum (right) |
tegmina and hind wings in both sexes vestigial and hidden under pronotum (images of all 3 species in next block) |
| hind femora |
| strongly shortened, slender | slender, relatively long, particularly in males |
| phylogenetic relationships |
| subfamily Pneumorinae (Dirsh 1975) | subfamily Parabullacrinae (Dirsh 1975), but the non-inflated males may be alternative morphs of inflated species (i.e. Pneumoracris browni = Peringueyacris namaqua, Paraphysemacris spinosus = Physemacris variolosus), the situation of Parabullacris vansoni with respect to the Bullacris unicolor complex is less clear (M. J. van Staaden's Pneumoridae website) |
