Ootetrastichus

Key to females of A. ( Ootetrastichus ) from the Amur Province

1. Antennae with funicular segments much longer than broad, at least 3 times as long as broad (F1 up tu 5 times); gaster lanceolate, including ovipositor sheaths 1.3–1.5 times as long as head plus thorax; fore wing 2.05–2.42 times as long as broad ….....………….........… ……………................................................……….….. A. (O.) mycerinus (Walker, 1839) View in CoL

– Antennae with funicular segments shorter, at most 2.5 times as long as broad; gaster longitudinal-oval, including ovipositor sheaths slightly shorter or as long as head plus thorax; fore wing narrower …………..................................……………..……………… 2

2. Body dark green without yellow-marked; propodeal callus with 4 setae ………..………… ………………………………........................................................… A. (O.) walkeri sp. n.

– Base of gaster pale yellow; propodeal callus with 2 setae ……..............………………..… 3

3. Mesosoma dark green with a dull bluish metallic luster ( Fig. 1, 1 View Figs 1–7 ) …….................……… …………………………………….….....................................…. A. (O.) kostjukovi sp. n.

– Mesosoma bright green or green-blue with a metallic luster …….............…………..…… 4

4. Head with yellow-brownish regions ( Fig. 2, 1–5 View Figs 1–7 ); frons without median line ……......…… ………………………………….…….....................................…… A. (O.) vasilisae sp. n.

– Head without yellow-brownish regions, except mouth-edge testaceous; frons with median line ….……..........................…………………..…. A. (O.) microocellus Kostjukov, 1995