Perigonia thayeri Clark, 1928

Most similar to Perigonia pallida. Forewing apex and tornus less acute than in Perigonia pallida, with the distal margin medially less convex. First segment of labial palp with a white lateral line, but less prominent than in Perigonia pallida. Forewing upperside ground colour similar to Perigonia pallida but pattern more contrasting; dark apical line and discal spot both more prominent. Forewing underside ground colour paler than in Perigonia pallida, with the irregular distal marginal band darker. Median band of hindwing upperside deep yellow as in Perigonia pallida, but slightly less extensive, as is the yellow area along the inner margin. Hindwing underside ground colour paler than in Perigonia pallida; median and postmedian transverse lines, and distal marginal border, more prominent than in Perigonia pallida. 32 mm.