by William Swainson, Zoological Illustrations — Vol II. Pl… (1820)
“ Both sexes of this newly described insect are here, for the first time, figured; that above is of the male, and beneath is represented the under side of the female. The crimson spots (which finely relieve the brownish velvet-like black on the upper surface of the wings) are, in some lights, most beautifully glossed with changeable violet, and appear either darker or paler according to the position in which the insect is viewed. ”
