Aptly named a ‘thief ant’, S. fugax preys on the brood of larger ants. It is seldom seen above ground.The aggressive yellow or brownish-yellow workers are small (1.5-3.0mm long), but the blackish brown females and black males are considerably larger (6.0-6.5mm and 4.0-4.8mm, respectively) (Collingwood 1979). S. fugax is the sole representative of its genus in Britain.
Solenopsis fugax is found throughout Europe as far north as southern England and south Sweden. Except for the sheltered Goblin Combe in Somerset, all known English and Channel Islands sites are coastal. The species’ known range extends beyond Europe to north west Africa, the Caucasus, Middle East, Asia Minor and Central Asia, and the southern part of Western Siberia (Czechowski, Radchenko & Czechowska, 2002).