Key to the species of Centerichneumon Heinrich, 1938

1. Head strongly transverse, face about 3.7 × as wide as medially high (width measured as the maximum distance of the inner orbits, height measured in the center from the edge of the clypeus to the level of the antennal sockets) (A); area superomedial not clearly separated from area basalis, forming an elongated continuous area (shaded area) (B); area externa and area dentipara not separate (anterior transverse carina not distinct) (B); mesoscutum flat in lateral view (Fig. 7A, C); clypeus and face pale yellow (A), frons orange-brown (Fig. 8A); metasoma entirely orange, except for the 7 th tergite which is dorsally brown with a white apical margin (Fig. 7B); 2 nd and 3 rd tergites densely but superficially punctate (C) ........................................................... C. nambi Dal Pos, Diller & Di Giovanni sp. nov.

– Head not strongly transverse, face about 3.0× as wide as medially high (a); area superomedia inverted heart-shaped (shaded area), weakly separated from area basalis (red arrow), and not forming an elongated continuous area (b); area externa and area dentipara distinctly separated (anterior transverse carina clearly present) (b); mesoscutum convex in lateral view (Figs 2B, D, 5A, D); clypeus, face and frons pale white (a); metasoma with white posterior band on apical tergites (Figs 2A–D, 4A–B); 2 nd tergite shagreen with sparse punctures posteriorly, 3 rd tergite shagreen (c). ............................................................................................................ C. denticoxatus Henrich, 1938