"Z. betulae" L. Black-brown; male with a pale diffuse patch, female with a broad orange band beyond the crossveins. Underside ochreous, with dark-edged white lines. In North and Central Europe und Northern Asia eastward to the Pacific. Tutt name males without the pale diffuse patch beyond the crossveins ab. "unicolor", while this patch is nearly white in ab. "pallida" Tutt. In ab. "spinosae" Gerh. there appear beyond the apex of the cell small orange-spots , which may be paler yellow than the discal spots of the female. The orange discal band of the female is sometimes narrow: ab. "restricta" Tutt, and sometimes broad (= ab. "lata").