Pictorial key to the ant genera of Illinois

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

Fig. 52 Proceratium pergandei (antweb.org)

Fig. 53 Ponera pennsylvanica (antweb.org)

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A Dorsum of mesosoma lacking a promesonotal suture, with the metanotal suture usually lacking as well.

 

B Tergite of abdominal segment 4 always enlarged and strongly arched so that it forms the rearmost part of the abdomen when viewed in prolife; apex of abdomen directed anteriorly.

 

...Proceratium
15'
AA Dorsum of mesosoma with at least the promesonotal suture; the metanotal suture usually present as well.

 

BB Abdominal tergite 4 not strongly enlarged and only weakly arched; apex of abdomen directed rearwards or ventrally not anteriorly.
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