''Arachnospila anceps'' is one of the more common

spider wasp Wasps in the family Pompilidae are commonly called spider wasps, spider-hunting wasps, or pompilid wasps. The family is cosmopolitan, with some 5,000 species in six subfamilies. Nearly all species are solitary (with the exception of some group-ne ...

s of western Europe.

Description

''A. anceps'' is a medium-sized, black and red spider wasp.

Distribution

This species is found in northern and central Europe, including most of Britain and Ireland, and in Asia east to Mongolia.

Biology

The flight period is May to September and the species is probably

univoltine Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. The term is most often applied to insects, and is particularly in use in sericulture, where silkworm varieties vary in their voltinism. ...

. A wide range of spiders are taken as prey; the families

Lycosidae Wolf spiders are members of the Family (biology), family Lycosidae (), named for their robust and agile hunting skills and excellent eyesight. They live mostly in solitude, hunt alone, and usually do not spin spider web, webs. Some are opportunis ...

Clubionidae The sac spiders of the family Clubionidae are nocturnal, sac-building hunting spiders with a near-worldwide distribution. Their sacs, silken retreats in which they hide during the day, may be made in a variety of places, including between folded ...

and

Thomisidae The Thomisidae are a family of spiders, including about 170 genera and over 2,100 species. The common name crab spider is often linked to species in this family, but is also applied loosely to many other families of spiders. Many members of thi ...

have been recorded and

Gnaphosidae Ground spiders comprise Gnaphosidae, the seventh largest spider family with over 2,000 described species in over 100 genera distributed worldwide. There are 105 species known to central Europe, and common genera include '' Gnaphosa'', '' Drassode ...

and

Agelenidae The Agelenidae are a large family of spiders in the suborder Araneomorphae. Well-known examples include the common "grass spiders" of the genus ''Agelenopsis''. Nearly all Agelenidae are harmless to humans, but the bite of the hobo spider (''Era ...

are also possible prey. The spider is paralysed before being dragged backwards to the nest site where it is hidden on a plant while the burrow is rapidly excavated. It occurs in a variety of habitats and on most soils with the possible exception of heavy clay soils. There are no records of which flowers are visited by ''A. anceps'' for nectar.

References

Hymenoptera of Europe Pompilinae Insects described in 1851 {{apocrita-stub