Cotana postpallida is a moth in the Eupterotidae family. It was described by Rothschild in 1917. It is found in New Guinea. The wingspan is about 53 mm. The forewings are deep liver-brown with a large antemedian grey and black stigma, a median transverse black band and the outer one-third with a somewhat ill-defined postdiscal grey band and grey cloudings beyond. The basal half of the hindwings is orange suffused with brown and crossed by a dark band, while the outer half is dull brown slightly suffused with orange and crossed by a greyish-olive band edged with serrated brownish cloud-lines.