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Species Therion circumflexum

Wasp - Therion circumflexum Moving wasp - Therion circumflexum - female Anomaloninae? - Therion circumflexum - female ichneumon - Therion circumflexum - female Therion ? - Therion circumflexum Therion? - Therion circumflexum - female Ichneumonid - Therion circumflexum - female Therion sp. - Therion circumflexum - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" - Parasitoid Wasps)
Superfamily Ichneumonoidea (Braconid and Ichneumonid Wasps)
Family Ichneumonidae (Ichneumonid Wasps)
Subfamily Anomaloninae
Tribe Gravenhorstiini
Genus Therion
Species circumflexum (Therion circumflexum)
Synonyms and other taxonomic changes
Therion circumflexum (Linnaeus, 1758)
Therion callosum (Shestakov, 1923)
Therion curticorne Bauer, 1967
Therion japonicum (Cameron, 1906)
Therion laricis (Matsumura, 1926)
Therion nigroscutellatum (Hellen, 1926)
Therion nigroscutellatum (Uchida, 1928)
Therion nigrum (Provancher, 1879)
Therion nipponicum (Uchida, 1928)
Therion occidentale (Cresson, 1879)
Therion ramidulum (Christ, 1791)
Therion rubropictum (Ulbricht, 1926)
Therion unicolor (Ratzeburg, 1844)
Explanation of Names
Therion circumflexum (Linnaeus, 1758)
from the Latin circumflexum ('bent about')
Body length of over 20 mm, one of our largest species(1)
Very large size. Coloration: head black (female with only orbits and central stripe yellow, male with face entirely yellow), thorax black with at most some red spots, wings light brown, coxae black, trochanters red, first 3 abdominal segments strongly red.(1) Anterior of T1 black as opposed to entirely amber as in T. fuscipenne.(2) Hind tibia longer than combined length of hind femur plus trochanters.(1)

widespread in some parts of the Palearctic & Nearctic realms (3)(4)
oak-chaparral, willows(5)
Adults fly from mid-June to September in Commanster, Luxembourg.(6)
Life Cycle
Adult females search out caterpillar hosts using both tactile and olfactory cues. She uses her antennae to feel the surface to determine that the integument is wrinkled with no patches of setae present, which indicate an appropriate host. A female will only oviposit in hosts that meet these requirements and will reject any other species, even in the prolonged absence of hosts with the proper tactile cues.(5)