Mesomachilis nearcticus
Distribution:
USA: Arizona (Sturm, 1991; Mendes, 1992), California (Silvestri, 1911; Paclt, 1972; Sturm, 1991; Baldo et al., 2010), Colorado (Silvestri, 1911), Nevada (Sturm, 1991; Baldo et al., 2010), and Utah (Baldo et al., 2010).