21. The shoes were designed with a wing venation pattern like the mayfly and were also said to have a finite lifetime. 22. Structural characters derived from the genitalia, wing venation , sphragis and foretibial epiphysis are more, but not entirely reliable. 23. Both families have unusual and distinctive wing venation by which they can be easily recognized, in addition to other features. 24. Areas of the " Ulteramus " wing venation are similar to members of the pamphiliid subfamilies Pamphiliinae and Cephalciinae. 25. Tabanid identification is based mostly on adult morphological characters of the head, wing venation , and sometimes the last abdominal segment. 26. The quadrilateral ( a part of the wing venation , close to the body ) has an acute angle at the end. 27. They are characterized by their long and slender wings, and the transverse shape of the discoidal triangles in their wing venation . 28. The wing membrane is almost entirely transparent ( hyaline ) and whitish, while the wing venation is mostly brown-yellow. 29. Members of the family Ichneumonidae are usually larger than members of the Braconidae, and are distinguished primarily by details of wing venation . 30. The plumose ( feathery ) arista, bristling of the head and thorax, and wing venation are characters used to diagnose the family.
