Lewis & Short

sŏlĭpūga, ae, f., a kind of venomous ant (or, acc. to Solinus, a kind of venomous spider), Plin. 29, 4, 29, § 92; 22, 25, 81, § 163.
Called also solpūga, Luc. 9, 837; soli-pugna, acc. to Fest. pp. 300 and 301 Müll.; sŏlĭfūga, Sol. 4, 3 and 6; and salpūga, Plin. 29, 4, 29, § 92.