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Key to species of the genus Psilomma 1. Anterior scutellar pit bare inside (Figs 81, 88); head with sparsely pubescence above: pubescence of gena distinctly denser than pubescence of vertex and occiput (Figs 82, 86); male A3 without projection at base of emargination (Figs 84, 92)................................... 2 – Anterior scutellar pit pubescent inside, covered by upstanding setae (Figs 94, 97, 101, 105); head with dense pubescence above: pubescence of gena, vertex and occiput similar (Figs 97, 101); male A3 with small projection at base of emargination (Figs 99, 106)..............................................................................................................................................… 3 2. Pronotal anterior corners weakly projecting, rounded (Fig. 82); medial furrow at the base of T2 deeper, wider and always longer than lateral furrows (Fig. 81); S2 of female without round projecting at base in lateral view (Fig. 79).....................… P. calaris sp. n. – Pronotal anterior corners strongly projecting, sharped (Fig. 86); medial furrow at the base of T2 no deeper, no longer (rare slightly longer) and no wider than lateral furrows (Fig. 88); S2 of female with round projecting at the base in lateral view.... P. dubia Kieffer 3. Face slightly wider than high (Fig. 95); female А9–А14 about as wide as long (Fig. 96); male antenna yellow or pale brown, А3–А14 with short recumbent pubescence (Figs 98, 99).................................................................................................… P. fuscicornis Kieffer – Face slightly higher than wide (Fig. 102); female А9–А14 distinctly longer than wide (Fig. 103); male antenna brown, А3–А14 with long semi-erect pubescence (Figs 104, 106)...............................................................................................… P. fusciscapis Förster, Published as part of Chemyreva, V. G. & Kolyada, V. A., 2021, Review of the subtribe Psilommina (Hymenoptera: Diapriidae, Belythinae) from Russian fauna, pp. 1-34 in Far Eastern Entomologist 436 on pages 26-27, DOI: 10.25221/fee.436.1, http://zenodo.org/record/7166134