C^1 Both pairs of wings _alike_ in structure, either membranous or scaly D C^2 Fore and hind wings _unlike_ in texture, fore wings fold over hind wings E D^1 Both pairs of wings _membranous_, not covered with scales F D^2 Both pairs of wings covered with _scales_; mouth parts tubular for sucking Lepidoptera E^1 Fore wings very _smooth_, sheath or shell-like, meeting in a _straight line_ when folded; legs adapted for walking, running, or swimming; mouth parts for biting Coleoptera E^2 Wings not as in E^1 I F^1 Wings membranous, usually folded or partly folded; _few nerves_ G F^2 Both pairs of membranous wings usually _outspread_, _many nerves_; mouth parts for biting H G^1 Wings membranous, hooked together and partly folded, or outspread, _few nerves_ in the wings; mouth parts for _both biting and sucking_; regions of the body usually very distinct Hymenoptera G^2 Wings membranous, usually folded, _few nerves_; _mouth parts_, a _beak_ for sucking and piercing Hemiptera H^1 _Outspread membranous_ wings, nearly equal in size; _antennæ very short_ and inconspicuous Odonata H^2 As in F^2, but _antennæ not short_; wings sometimes folded Neuroptera H^3 Both pairs of wings membranous, folded above the back; fore wings much larger than hind wings; ovipositors long; mouth parts rudimentary Ephemerida I^1 Fore wings folded over hind wings, _crossing_ at their tips, which are membranous, base of wings thickened, mouth parts a beak for piercing Hemiptera I^2 _Fore wings leathery_, folding either at side of body or on the back; mouth parts for biting, legs often adapted for _jumping_ Orthoptera _Note 1._--When wings are folded, it will be helpful to remember that thickened fore or cover wings always have membranous wings folded beneath them. _Insects with no wings_ _Order_ a. Body long and slender, stick-like; legs for walking. Walking stick Orthoptera b. Grasshopper-like. Cricket grasshopper Orthoptera c. Small size; regions very distinct; abdomen spindle-shape. Ants Hymenoptera d. Small size; ant-like in appearance; pale white. White ants Isoptera