Figs. 1 –3, 14.
Mesocapnia variabilis (Klapálek, 1920): Klapálek 1920: 3; Illies 1966: 149; Zwick 1973: 388; Zhiltzova 1995:29; Zhiltzova 2003: 381; Stewart & Oswood 2006: 34; Vinçon & Sivec 2011 124; Judson & Nelson 2012: 22.
Capnia ogotoruka Jewett, 1964: 124 –125; Illies 1966: 144; Zwick 1973: 387. Capnia beringi Ricker, 1965:485 –486; Zwick 1973: 387.
Material examined. 1♂: China: Inner Mongolia Autonomous Region, Genhe City, Hanma National Nature Reserve, Daxingan Mountains, Monitoring Station, 30 July, 2014, leg. Zhi-Teng Chen.
Diagnosis and remarks. Mesocapnia variabilis males are macropterous (Fig. 3). The main epiproct sclerite has a distinct swollen bulb near midlength, narrowing distally and slightly wider before gradually tapering to a point (Figs. 1–2, 14). This species was previously reported from British Columbia, Yukon, Canada; Mongolia; northern Europe; and Russia (Stewart & Oswood 2006, DeWalt et al. 2016).