Pictorial key to the ant genera of Illinois

by N.C. Wilkins and S.B. Menke

Fig. 5 Tapinoma sessile (antweb.org)

Fig. 6 Hypoponera opacior (antweb.org)

2
A Sting absent.

 

B No constriction present between abdominal segments 3 and 4.

 

3
2'
AA Sting present, often prominent.

 

BB Usually with a visible constriction between abdominal segments 3 and 4.

 

14