Spilosoma ignivagans is a moth in the family Erebidae. It was described by Rothschild in 1919. It is found in China (Yunnan).
<big>Male</big>
Very closely allied to erythrophleps, Hmpsn., but with less red on fore wings and fewer pale markings on hind wings. Antennae black, pectus and legs sooty-slate, frons and vertex rufous-orange; thorax rufous-orange, with a sooty dot on teguloe and sooty streaks on patagia; abdomen above rufous-orange ringed with sooty black, below white. Fore wing slate-brown with orange-scarlet nervures; three ill-defined orange-scarlet patches on basal half of costa; two rufous-orange spots in cell and one beyond; four irregular bands of rufous-orange below median to inner margin, much angled, waved, excised, and partially joined. Hind wings sooty slate-grey, with white veins; a broken irregular post-median band, broader between vein 2 and abdominal margin; some white spots at end of veins. Length of fore wing 26 mm.; expanse 56.5 mm. Hab. Tali, Yunnan.