The subspecies was described as a subspecies of Stichophthalma howqua, a species that with type found from Shang Hai, East China. The taxon suffusa was described as a subspecies of howqua in the original description by Leech, 1892. The publication of 2008 by Mornastyrskii and Deviatkin showed that suffusa with the type found from Omei Shan, China and howqua are distinguish species and they separated by dark pattern of the hind wings on upper side. So the subspecies tonkiana that described by Fruhstofer in 1901 under the species S. howqua was moved to the species S. suffusa. However in the paper, authors also mentioned about further studies of subspecies level should be done in the future.
They are large size butterflies, and found in a good forests in North Vietnam, similar to other species of the genus, they are attracted by rotten fruits or animal dead body.
Stichophthalma suffusa tonkiana Fruhstofer, 1901 - upper side
Stichophthalma suffusa tonkiana Fruhstofer, 1901 - under side