59 Catalogue Hafner, M.S. 1977 10 km. S, 2 km. W Sombrerete, 2130 m., Zacatecas, México. 22 July testes = 12 mm., scrotal?, tub. visib. + tissue, No blood skeleton 904 ♂ Thomomys umbrinus vag. closed; multiparous 183-63-26-7 = 66 + g. + tissue, blood 905 ♀ Thomomys umbrinus 184-62-25-6 = 69 g. + tissue, blood testes = 11 mm., scrotal; tub. visib. 906 ♂ Thomomys umbrinus 186-61-25-6 = 80 g. + tissue, blood testes = 10 mm., scrotal; tub. visib. + chrom. 907 ♂ Thomomys umbrinus 198-63-27-6 = [no wt.] + tissue, blood testes = 12 mm., scrotal; tub. visib. 908 Thomomys umbrinus 193-61-26-6 = 86 g. 3 km. N Ojocaliente, 2030 m., Zacatecas, México. 23 July + tissue, blood ♂ testes = 6 mm., abdom. skeleton 909 Thomomys umbrinus 195-65-26-6 = 85 g. + tissue, blood ♂ testes = 9 mm., scrotal; tub. visib. 910 Thomomys umbrinus 208-67-28-7 = 118 g. + tissue, blood vag. closed; uterus swollen, emb: 22-14 = 8 mm 911 ♀ Thomomys umbrinus 200-67-27-7 = 105 g. + tissue, blood vag. closed; uterus swollen (prog) 912 ♀ Thomomys umbrinus 202-59-27-7 = 104 g. + tissue, blood testes = 7 mm.; 2 abdom 913 ♂ Thomomys umbrinus 216-69-30-7 = 122 g. + tissue, blood testes = 14 mm., scrotal; tub. visib. 914 ♂ Thomomys umbrinus 228-70-29-7 = 136 g. + tissue, blood testes = 13 mm., scrotal; tub. visib. 915 ♂ Thomomys umbrinus 223-72-29-7 = 135 g. + tissue, blood vag. closed; emb: 1R-1L = 12 mm. 916 ♀ Thomomys umbrinus 195-62-27-7 = 89 g. + tissue, blood vag. closed; uterus slightly swollen. skeleton 917 ♀ Thomomys umbrinus 189-55-25-6 = 82 g. + tissue, blood testes = 6 mm., abdom. skeleton 918 ♂ Thomomys umbrinus 188-54-26-6 = 73 g. + tissue, No blood vag. closed; no emb.; no scars; parous 919 ♀ Thomomys umbrinus 199-57-27-7 = 89 g. + tissue, blood vag. closed; scars 22-21 920 ♀ Thomomys umbrinus 198-62-28-7 = 89 g. + tissue, blood + chrom. 921 ♀ Thomomys umbrinus 196-66-27-7 = 84 g.