FIGURE 5. Dorsal views of head of the Micrurus spixii obscurus (A—IAVHR 4008) province of La Macarena, department of Meta, Colombia; M. s. obscurus (B—USNM 232484) province of Pastaza, Ecuador; M. s. obscurus (C—FMNH 68589) from province of Puno, department of Puno, Peru; M. s. obscurus (D—MNRJ 1007) municipality of Manaus, state of Amazonas, Brazil; M. s. princeps (E—ZMS 697/2002) from province of Cochabamba, department of Cochabamba, Bolivia, and M. s. princeps (F—BMNH 1946.1.20.44) province of Sara department of Santa Cruz, Bolivia. Scale bar= 6 mm.