Pictorial key to the ant genera of Illinois

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

Fig. 84 Pheidole pilifera (antweb.org)

Fig. 85 Myrmica emeryana (antweb.org)

Fig. 86 Temnothorax curvispinosus (antweb.org)

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A Propodeum depressed below level of promesonotum in side view and/or metanotal impression substantial. Separating promesonotum and propodeum into separate, evenly rounded convexities.
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26'
AA Propodeum not depressed below level of promesonotum. Metanotal impression often absent or slight when present, just briefly interrupting the mesosomal profile.
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