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Key to Subfamilies of Formicidae in the Southeastern United States (based on workers)
(modified from Creighton (1950) and Bolton (1994)
Couplet 7

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7(1) Frontal carinae not close together, often covering the base of the antennae; clypeus usually prolonged back between the frontal carinae (figure 17) ...Myrmicinae

7' Frontal carinae close together, not covering the base of the antennae; clypeus not prolonged back between the frontal carinae (figure 18) ...couplet 8

Figure 17. Full face view of myrmicine ant showing widely separated frontal carinae and clypeus extending back between frontal carinae.

Figure 18. Full face view of Pseudomyrmex pallidus showing the frontal carinea close together and the clypeus not extending back between carinae.