Pictorial key to the ant genera of Illinois

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

Fig. 64 Crematogaster lineolata (antweb.org)

Fig. 65 Tetramorium caespitum (antweb.org)

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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.
20