Pictorial key to the ant genera of Illinois

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

Fig. 95 Stenamma diecki (antweb.org)

Fig. 96 Pheidole morrisi (antweb.org)

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A Antennal sockets closely approximated; thus median posterior portion of clypeus forms a narrow, finger-like projection that extends rearwards between the frontal lobes.

 

B Anterior median portion of clypeus often with a pair of fine, longitudinal carinae that diverge anteriorly.

 

...Stenamma
29'
AA Antennal sockets not closely approximated, the median posterior portion of the clypeus forming a triangular or broadly rounded shape extending rearwards between the frontal lobes.

 

BB Clypeus never bicarinate.
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