Forelius

is a genus of thermophilic ants that occur in warm, open habitats throughout the Americas. These small, active insects nest in soil and are often the only ants out during the hottest parts of the day.

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Her nest breached by attacking Forelius nigriventris (at right), a fire ant adopts typical defensive position: stinger raised and exuding a droplet of volatile venom.

Santiago del Estero, Argentina

Forelius nigriventris attacking a fire ant worker (Solenopsis invicta).

Santiago del Estero, Argentina

A nest of Forelius nigriventris in the Paraguayan chaco.

Mcal. Estigarribia, Paraguay

Forelius pruinosus brood nest with eggs and young larvae.

Mojave National Preserve, California, USA

Forelius pruinosus workers warm themselves on a cool spring morning under a sun-exposed stone.

Konza Prairie, Kansas, USA

Forelius pruinosus carry excavated soil from their nest.

Konza Prairie, Kansas, USA

Forelius pruinosus workers warm themselves on a cool spring morning under a sun-exposed stone. Note the color variation among workers; color is not always a reliable identification character in ants.

Konza Prairie, Kansas, USA

A fallen robber fly quickly attracts ants. In the heat of mid-day, the thermophilic Forelius is the only species that tolerates the hot sand.

Archbold Biological Station, Florida, USA

Her nest breached by attacking Forelius nigriventris (at right), a fire ant adopts typical defensive position: stinger raised and exuding a droplet of volatile venom.

Santiago del Estero, Argentina

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Forelius

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