About Dicycla oo (Linnaeus, 1758)
This is the technical description and variation for Dicycla oo (Linnaeus, 1758). The forewing is pale yellow, slightly dusted with ferruginous; the veins, lines, and outlines of the stigmata are ferruginous, and the fringe is mottled with this same colour. The hindwing is yellowish white, washed with grey, and darker before the termen. In the form ferruginago Hbn., the base and the space between the outer and submarginal lines are dark. In the aberration renago Haw. (47 k), there is a ferruginous fascia before the inner line and between the median shade and submarginal line, united along the inner margin. The form sulphurea Stgr. is wholly sulphur yellow. Sometimes, the ferruginous scales are replaced by grey; this is the aberration griseago Schultz. The larva is black-brown, clotted with white; its lines are white. The dorsal line is irregularly blotched, the subdorsal line is slender, and the spiracular line is broad. The wingspan of Dicycla oo ranges from 32 to 39 mm.
