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Evaniidae : ウィキペディア英語版
Evaniidae

The Evaniidae, also known as the ensign wasps or hatchet wasps, are a family of parasitic wasps. They number around 20 extant genera containing over 400 described species, and are found all over the world except in the polar regions. The larvae of these solitary wasps feed on cockroaches, and develop inside the egg-cases (oothecae) of their hosts.〔Deans (2008)〕
==Description==
Evaniidae have the metasoma attached very high above the hind coxae on the propodeum, and the metasoma itself is quite small, with a long, one-segmented, tube-like petiole, and compressed laterally over most of its length (segments 2-8). The ovipositor is short and thin. When active, these wasps jerk the metasoma up and down constantly, as referenced in their common names. The mesosoma is high, short, and heavily sclerotized, with a ridged and pitted surface. The head is largely immovable and attaches to the metasoma on a short neck, with usually 13-segmented antennae that do not differ between males and females.〔
Apomorphies of ensign wasp wings and their venation are:〔
* deeply separated jugal lobes in fore- and hindwings
* loss of cross-veins on the distal forewing (though this is hard to determine in some)
* hindwings retain only medial, cubital, and part of the costal vein; all others have been lost

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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