This subfamily of ants includes many genera mostly distributed through the tropics. The sting is absent but many species have poison glands that excrete a repellant fluid through the anal orifice. The gaster has a reduced number of segments compared with Formicinae and only four are visible in dorsal view in workers and queens and five in the males. The anal aperture is flattened with a hairless horizontal slit. Only one genera and two species are native in Britain.
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