Insect Order Dictyoptera - cockroaches and mantids
Dictyoptera are described as variably sized insects with generally filiform (long and thin) antennae usually composed of many small segments. They have mandibulate or biting mouthparts and legs that are roughly similar (except the Mantids which have raptorial forelegs), most have 5 tarsi. Many species are winged and the forewings are generally hardened into a tegmina while the hind wings are often fan-like,  the wing buds of the nymphs do not undergo reversal (i.e. the hind wings are not folded back over  the forewings).  The genitalia of both sexes are generally concealed, behind the 7th abdominal segment in the female and behind the 9th in the male. Cerci are present and males bear a pair of styles as well. No specialized stridulatory organs are present though some Mantids do have a single ear on the metathorax which allows them to hear the sonar of bats. The eggs are laid in an ootheca.