The Orussoidea, parasitic wood wasps, have retained a relatively ancestral form of ectoparasitism of buprestid beetles and siricid woodwasps... Little is known of the mode of action of the venom, if any, but late-instar larvae appear to feed on or in the host after it is dead.

The phylogenetic relation of Orussidae within the order of hymenoptera seems to be: [Siricoidea + (Orussoidea + Apocrita)].

source: J. B. Whitfield (1998) "PHYLOGENY AND EVOLUTION OF HOST-PARASITOID INTERACTIONS IN HYMENOPTERA", Annual Review of Entomology Vol. 43: 129-151

Phylum: Arthropoda Subphylum: Hexapoda Blainville, 1816 class Insecta - Insects subclass Pterygota Infraclass: Neoptera Martynov, 1923 Order: Hymenoptera Linnaeus, 1758 - (bees, ants and wasps, Hautflügler) Suborder: Symphyta Gerstäcker, 1867 (sawflies, Pflanzenwespen) Superfamily: Orussoidea Family: Orussidae (parasitic plant wasps) Subfamily: Orussinae Genus: Orussus Latreille, 1796

probably: Orussus abietinus (Scopoli, 1763) more info: bugguide.net/node/view/13615 more info (German): germany.hymis.eu/species&s=27705 taxonomiacal info: www.biolib.cz/en/taxonposition/id63003/

Germany, Brandenburg, vic. Königs-Wusterhausen: Forst Dubrow (Haus des Waldes), 15.05.2013, at 4:27pm