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A large pale-tan, geo, with the markings restricted to a straight transverse line from the apex to the anal margin of the forewing, a sharp, small discal spot, and a dusting of dark scales. Hindwings unmarked except for a faint discal spot. The straight PM line and absence of other prominent wing markings will separate the two Tetracis species; T. cachexiata is much paler (cream-white), lacks a discal spot and the dusting of dark scales.

The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segments; colour is extremely variable, ranging from grey to brick, tan or brown. The pupa overwinters (Wagner et al. 2003). The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segments; colour is extremely variable, ranging from grey to brick, tan or brown. The pupa overwinters (Wagner et al. 2003). The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segments; colour is extremely variable, ranging from grey to brick, tan or brown. The pupa overwinters (Wagner et al. 2003).