gaster anteriorly surrounded completely by petiole, with junction clearly visible from above and no part of junction covered by the 1st gastral tergite (extremely rarely that of the 1st gastral sternite) (figs 1-3). Males nearly always with RSS on A3. A clearly defined split between laterosternite and ventral sternite present on S2, and frequently following sternites. Antennal formula nearly always 15-14 (females-males).

1.Dorsal petiole/gaster junction
2. Lateral petiole/gaster junction...
3.Lateral metathorax.