Spilarctia nydia is a moth in the family Erebidae. It was described by Arthur Gardiner Butler in 1875. It is found in Nepal, China (Zhejiang, Jiangsu, Jiangxi, Fujian, Guangdong, Yunnan), Taiwan and northern Vietnam.
Subspecies Spilarctia nydia nydia (Nepal) Spilarctia nydia tienmushanica Daniel, 1943 (China: Zhejiang, Jiangsu, Jiangxi, Fujian, Guangdong, Yunnan) Spilarctia nydia werneri Kishida, 1991 (Taiwan)
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