|Brimstone (Opisthograptis luteolata)|
|(Rumia crataegata) Brimstone Moth|
However the description of the moth (Humphreys and Westwood) is a lesson in scientific description: the costa of the forewings, marked at the base, before and beyond the middle, and at the tip, with ferruginous patches; from the second and fourth of these patches arise two slightly dusky strigae of lunules (variable in intensity), and the third is connected with an oval patch of gray scales, bordered with rusty red; the hind wings slightly marked with dusky.
|Brimstone Moth wing markings|
The two photographs here were taken by Bowen Chang when he was at Shandy Hall (2014) as an intern from the University of Pennsylvania - they show how the markings of mysterious, rusty letters vary in intensity.
|Brimstone Moth lunules|