Javelin Wasp
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Gasteruption jaculator
Fairly common & widespread in Britain.
Flies from May-September.
The head and thorax are completely black.
The head is strongly rounded, the thorax is elongated in a sort of long neck (propleura), which separates the head from the body.
Also the abdomen is strongly stretched, broader at the posterior end and placed on the upper chest (propodeum).
The abdomen is black, with reddish-orange rings.
The tibiae of the hind legs are club shaped.
In the Female the ovipositor is usually very long with a white tip.
In resting position, these wasps slowly and rhythmically raise and lower the abdomen.