Promalactis serpenticapitata is a moth of the family Oecophoridae. It is found in Fujian, Jiangxi and Zhejiang provinces of China.
The wingspan is about 10.5–13 mm. The basal three-fifths of the forewings are ochreous brown, the distal two-fifths are ochreous yellow. The markings are silvery white or white, edged with dense black scales. The hindwings and cilia are dark grey.[1]
The specific name is derived from the Latin prefix serpent- (meaning snakelike) and the adjective capitatus (meaning having a head) and refers to the small, snake head shaped subapical process on the ventral surface of the gnathos.