Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Harpaphe haydeniana haydeniana (Wood, 1864). North America, USA, Washington, Thurston Co., Olympia. Photo courtesy of W. P. Leonard.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Harpaphe haydeniana (Wood, 1864). North America, USA, California. Photo courtesy of M. van de Merwe.

Egg masses of Harpaphe haydeniana haydeniana. North America, USA, Washington, Kittitas Co., 8 mi. E Snoqualmie Pass. Photo courtesy of W. P. Leonard.

North America, USA, Alaska, Prince of Wales I., Harpaphe haydeniana, instars in molting chamber. Photo by K. Ovaska, Aug. 2007.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Harpaphe haydeniana haydeniana (Wood, 1864). North America, USA, Oregon, Benton Co. Photo courtesy of W. P. Leonard.

Polydesmida: Xys-todesmidae: Xys-todesmini (=Har-paphini). Har-paphe haydeniana (Wood, 1864) mating pair with differently colored paranota. North America, USA, Oregon, Multno-mah Co., Portland. Photo courtesy of W. P. Leonard.

North America, USA, Alaska, Prince of Wales I., Harpaphe hayden-iana Female. Pho-to by K. Ovaska, Aug. 2007.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Harpaphe haydeniana (Wood, 1864). North America, USA, California. Photo courtesy of M. van de Merwe.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Harpaphe haydeniana (Wood, 1864) mating pair with differently colored paranota. North America, USA, Oregon, Multnomah Co., Portland. Photo courtesy of W. P. Leonard.

Levizonus thaumasius Attems, 1898. Asia, Far Eastern Russia. Photo courtesy of E.V. Mikhaljova.

North America, USA, Alaska, Prince of Wales I., Harpaphe haydeniana, early instar in molting chamber. Photo by K. Ovaska, Aug. 2007.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Harpaphe haydeniana (Wood, 1864). North America, USA, California. Photo courtesy of M. van de Merwe.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Isaphe convexa Cook, 1904. North America, USA, Idaho, Idaho Co., Photo courtesy of W.P. Leonard.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Isaphe convexa Cook, 1904. North America, USA, Idaho, Shoshone Co., Photo courtesy of W.P. Leonard.

Polydesmida: Xystodesmidae: Xystodesmini (=Harpaphini). Isaphe convexa Cook, 1904; rare, all black, color variant. North America, USA, Idaho. Photo courtesy of W. P. Leonard.