Key to US Tapinoma species

Key to workers of Tapinoma species known from the United States.

1

• Antennal scapes not quite reaching posterior of head; entire body pale yellow => Tapinoma litorale

Head of Tapinoma litorale worker

Profile of Tapinoma litorale worker

• Scapes surpassing posterior margin of head; at least part of body dark brown to black => 2

2

• Concolorous dark brown to blackish brown, gaster as dark or slightly darker than the rest of the body => Tapinoma sessile

Head of Tapinoma sessile worker

Profile of Tapinoma sessile worker

• Bicolored, head and mesosoma contrasting with gaster => 3

3

• Head completely brown and mesosoma largely brown, gaster whitish => 3 => Tapinoma melanocephalum

Head of Tapinoma melanocephalum worker

Profile of Tapinoma melanocephalum worker

• Head and mesosoma reddish, gaster black => 3 => Tapinoma schreiberi

Head of Tapinoma schreiberi worker

Profile of Tapinoma schreiberi worker