Underside pale brown, the basal two-thirds of both forewing and hindwing densely, the outer third more sparsely covered with dark ferruginous, somewhat broad, transverse striae.

The male differs on the upperside in the more or less complete absence of the subterminal and preapical blue markings on the forewing; and in the broad terminal border of the hindwing being of a much brighter, almost ochraceous chestnut.

[2] Race caudata "Spindle-shaped, slender, transversely rugose and clothed with short stout bristles...; head large, surmounted by two stout horns, sloping backwards, slightly branched at the ends; a pair of long straight caudal spines setose like the body; colour bright green with longitudinal yellow lines more or less distinct and two rows of large yellow spots tinged with green and sometimes tipped with black on the back; head dark brown, with a yellow cheek-stripe and frontal-line.

"[1] Race undularis "Elongate, fusiform, setose; green with longitudinal dorsal and lateral yellow lines, and a subdorsal row of yellow elongated spots, which are centred with red and posteriorly edged with blue; head brownish, armed with two erect brownish setose processes; anal segment also with two red slender hindward-projecting processes.

[3] "Suspended by the tail only, but in a rigidly horizontal position, regular with the exception of two small pointed processes from the head and an acute thoracic projection above them; colour bright green, beautifully ornamented with four irregular rows of large yellow spots bordered with red."