Pictorial key to the ant genera of Illinois

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


Fig. 21 Formica neogagates (antweb.org)

Fig. 22 Formica dolosa (antweb.org)

Fig. 23 Formica subsericea (antweb.org)

Fig. 24 Lasius minutus (antweb.org)

Fig. 25 Lasius alienus (antweb.org)

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A Mandibles with ≥ 7 teeth or denticles.

 

B Dorsum of propodeum often longer than posterior face (declivitous face)

 

B' or propodeum evenly rounded with faces not distinguishable.

 

C Ocelli present and well developed.

 

D Propodeal spiracle elliptical to broadly oval.

 

...Formica
7'
AA Mandibles with 5-6 teeth.

 

BB If ≥ 7 teeth, then dorsum of the propodeum is notably shorter than the posterior surface (declivitous face).

 

CC Ocelli very small or absent.

 

DD Propodeal spiracle circular to subcircular.

 

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