Formicinae: key to genera, couplet 1

Formicinae: key to genera couplet 1
Key: modified from Wheeler & Wheeler (1963), Hölldobler & Wilson (1990), Bolton (1994)

Taxa remaining

Acanthomyops
Brachymyrmex
Camponotus
Formica
Lasius
Myrmecocystus*
Paratrechina
Polyergus
Prenolepis

Figures 25, 26. Formicinae: Brachymyrmex depilis

Subfamily: Genus:

Formicinae Brachymyrmex B. depilis Emery MN, TC, Cedar creek, McKnight

1. Antennae with nine segments (Figs. 25, 26: 1a). (one species, B. depilis, collected in all Midwestern states)(none in Taiwan)
...Brachymyrmex

Antennae with twelve segments (Fig. 27).
...2.

Figure 27. Formicinae Acanthomyops coloradensis

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Subfamily:	Genus:
Formicinae	Brachymyrmex	B. depilis Emery	MN, TC, Cedar creek, McKnight

1. Antennae with nine segments (Figs. 25, 26: 1a). (one species, B. depilis, collected in all Midwestern states)(none in Taiwan)	...Brachymyrmex
Antennae with twelve segments (Fig. 27).	...2.