About Syrichtus cribrellum (Eversmann, 1841)
Syrichtus cribrellum (Eversmann, 1841) has forewings that measure 13–16 mm in length. This species resembles Muschampia tessellum, but is typically smaller, has larger white markings on the upper side of its wings, and has a distinctively yellow underside to its hindwing. In Seitz's description of this species (listed as H. cribrellum Evers, 85 e): the median band of the underside of the hindwing does not end at vein 8, and instead extends beyond it. The hindtibia lacks a brush of hair. Tarsi and tibiae are covered in spines. On the underside of the hindwing, the interspace between veins 7 and 8 has only one white spot toward its middle; the entire area between the brown postmedian band and the fringes is white, and the veins are also white. There are four apical spots. The species is found in South Russia, and from the Ural to Amurland and China. A form called hybrida form. nov. (also classified as H. cribrellum ssp. obscurior Staudinger, 1892), found in Kentei, has a dull black upperside to the wings, with a small ashy grey lunule at the apex of the cell. The two white smales located before the two terminal spots of the median band are absent, and the terminal spots of both the forewing and hindwing are small and almost circular. Staudinger named specimens from northern Amurland and Dauria, which have darker ground colour and smaller white marginal dots, obscurior (H. cribrellum ssp. obscurior Staudinger, 1892).
