Pictorial key to the ant genera of Illinois

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

Fig. 68 Tetramorium bicarinatum (antweb.org)

Fig. 69 Temnothorax ambiguus (antweb.org)

21
A Frontal carinae extending well past the eye, sometimes to the occipital margin.
22
21'
AA Frontal carinae ending far short of occipital margin, seldom surpassing the eye.

 

...Temnothorax (in part)