Psen ater
| Psen ater | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Psen ater | ||||||||||||
| ( Olivier , 1792) |
Psen ater is a hymenoptera belonging tothe Crabronidae family .
features
The wasp reaches a body length of 11 to 12 millimeters (females) or 10 to 11 millimeters (males). The species is easy to identify due to its size and long stalk limb ( Petiolus ). The females have a matt pygidial field, which distinguishes them from the similar females of Psen exaratus , whose pygidial field is shiny. The second returning wing vein opens into the third cubital cell, in Psen exaratus it opens into the second cubital cell. The antennae of the males are widened. Your first tarsal link is characteristically deformed on the front and middle pair of legs.
Occurrence
The species is distributed from Europe to Japan. It settles on semi-arid grassland and meadows on the edge of temperature-favored forests. The species flies in one generation from July to September. It used to be common in Central Europe, but is now rarely found.
Way of life
The adults fly to umbellifers to eat nectar. The females build their nests in loose sand and also in loamy-gravelly soil. Between six and twelve side corridors branch off from the main corridor, with a cell at each end. Each is filled with 10 to 20 leafhoppers (Cercopidae), especially Macropis lanio is hunted for this.
swell
Web links
literature
- Rolf Witt: Observe wasps, determine . 1st edition. Naturbuch-Verlag, 1998, ISBN 3-89440-243-1 .