Phasmid Study Group

The terms elytron or tegmen are almost always used when referring to the forewing of a phasmid. The term hindwing is usually used in preference to ala. If the term wing is used on its own it usually refers to the hindwing since in most phasmids the forewing is relatively insignificant. [See Elytron, Tegmen, Ala, Hindwing].