3a (2). First segment of abdomen not scale-like, if slightly nodiform then segment 2 lies close to segment 3; 1st abdominal segment inserted high up on propodeum (= posterior part of thorax which is actually 1st abdominal segment) so that distance between propodeal socket and insertion of hind coxa is ca. equal to or greater than distance between socket and hind margin of metanotum (Fig. A); antennae usually filiform (= thread-like), unspecialized, with 18 or more segments; fore wing with costal cell indistinct or absent, veins C, Sc, R and Rs fused between wing base and pterostigma (= opaque spot along costal wing margin) (Fig A); sternites of abdomen weakly sclerotized (= hardened); solitary larval parasitoids .........................................................................................................................(Ichneumonoidea) (part).......45

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3b. First segment of abdomen inserted low down on propodeum so that distance between propodeal socket and insertion of hind coxa is much less than distance between socket and hind margin of metanotum...................................................................................................................4