Formicinae: key to genera couplet 5
Key: modified from Wheeler & Wheeler (1963), Hölldobler & Wilson (1990), Bolton (1994)
Taxa remaining

Acanthomyops
Formica
Lasius
Paratrechina
Prenolepis


Figure 37. Formicinae: Formica argentea

Figure 38. Formicinae: Formica incerta

Figure 39.Formicinae: Lasius neoniger

5. Frontal carinae short but distinct, each a small ridge with a moderately to sharply angulate summit that is sometimes slightly reflected upward (Figs. 37,38); ocelli conspicuous (Figs. 37,38); with gaster in ventral view the first sternite with a conspicuous transverse sulcus behind the helcium; propodeal spiracle elliptical to broadly oval.
(collected in all Midwestern states)
...Formica
    Frontal carinae indistinct or absent (Fig. 39). If present, each carina is a small ridge with a distinctly rounded summit; ocelli small or absent; with gaster in ventral view the first sternite without a transverse sulcus behind the helcium; propodeal spiracle circular to subcircular. ...6.


Please send any questions or comments regarding these pages to Tim Linksvayer (Tim.Linksvayer@alumni.carleton.edu)
Last modified