Carrot Wasps
What are they?
A remarkable group of slender wasps that form the family Gasteruptiidae. Larvae feed on the larvae of other solitary wasp species, but may also function as 'predator-inquilines' - feeding on the food provided by the host wasps for their own young. Larvae overwinter in a coccoon and emerge in spring or early summer.
Identification
Adult insects might be mistaken for ichneumon wasps on account of their elongated look and the very long ovipositor of the female. However, these insects can be told from ichneumons by the elongated 'neck' between the head and thorax. Note also the broad section to the lower hind legs and also the position of the abdomen, which is often held high in the air.
Gasteruption assectator
A mostly black insect with brownish markings on the abdomen. Most likely to be seen feeding at the flowers of Wild Carrot or Fennel.
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