Gaster usually with a definite constriction between the first
and second segments or mandibles long, linear, inserted in the middle of the anterior margin of head with 2 or 3 teeth present apically; sting present and usually conspicuous (figure
without a constriction between the first and second segments; sting absent
or extremely reduced, never visible externally
Figure 3. (A) Lateral view
of the gaster of Ponera sp. showing constriction between first and second
segments and sting and (B) full face view of Odontomachus showing insertion points of mandibles.
Figure 4. Lateral view
of the gaster of Formicinae showing the lack of a constriction between
first and second segments and the lack of a sting.