Ensign wasps
Scientific name: Evaniidae
Ensign wasps
Scientific name: Evaniidae
Photo By Jennifer Rycenga , used under CC-BY-4.0 /Cropped and compressed from original 
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 mesosoma on a short neck; with usually 13-segmented antennae that do not differ between males and females. 
Scientific Classification
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