| In dorsal view only 4 gastral tergites visible (feature unclear in some specimens), the fifth concealed by the fourth; gastral tip opening posteriorly (feature unclear in some specimens); in Japanese species: metanotal groove shallow, propodeum barely raised (Fig. 2.3a) |
In dorsal view 5 gastral tergites visible (feature sometimes unclear), the fifth small but not concealed beneath the fourth; gastral tip opening ventrally (feature sometimes unclear); metanotal groove more or less deep, propodeum distinctly raised (Fig. 2.3a) |
