Dark-veined White

Seitz-bryoniae (21c), which inhabits the Alps, Northern Scandinavia and the mountains of Asia Minor; the male of the latter is rather more narrow-winged than napi-males, not bearing any markings on the forewing above except the blackish apical and basal areas; the female has a yellowish ground-colour, which is however more or less suppressed by the great extent of the dark scaling situated along the veins. Among the females there occur specimens in which the discal spots and the vein-streaks of the forewing are strongly obsolescent, there being consequently no prominent marking; we name this form ab. obsoleta nov.; individuals in which the yellowish ground-colour, especially on the forewing, is almost entirely suppressed by the greater extension of the dark scaling may be named ab. concolor nov..The form kamtschadalis Bang-Haas i. 1., from Kamchatka, is in the female somewhat paler than bryoniaeand the discal spots of the forewing are less sharply marked, the hindwing beneath being much paler. …

The species occurs in the Alps, the Fatra (Slovakia), the High Tatras, the Carpathians, parts of Turkey, the Caucasus, the Tian Shan and the Altai. The altitudinal distribution includes locations between 800 and 2700 meters. Typical habitats are mountainous meadows and flower-filled stream banks. In regions where the flight range of napi and bryoniae overlaps, hybrids napi x bryoniae can form .Because of the inherited migratory behavior of napi, these are occasionally found outside of the actual area of occurrence. However, these hybridsare us usually not capable of reproduction.