Pictorial key to the ant genera of Illinois
![](../../images/key/fig064.jpg)
Fig. 64 Crematogaster lineolata (antweb.org)
![](../../images/key/fig065.jpg)
Fig. 65 Tetramorium caespitum (antweb.org)
A Postpetiole attached to dorsal surface of abdominal segment 4 and capable of flexing upwards over dorsal surface of body.
B Petiole strongly flattened and lacking dorsal node.
...Crematogaster
19'
AA Postpetiole attached to anterior face of abdominal segment 4 and not capable of flexing upwards over dorsal surface of body.
BB Petiole nearly always with distinct dorsal node. If node absent petiole not strongly flattened.