_Specimens examined_ (5).--Central National Forest, near Pup´yong-ni, 1 (KU); 4 mi. SW Ch´ongyang-ni, 1 (KU); 10 mi. NE Mosulp´o, Cheju Do, 1 (UMMZ); 6-7 mi. NNE Sogwi-ri, Cheju Do, 1 (KU), 1 (UMMZ). _Remarks._--The specimen from the Central National Forest was captured on August 18 near a stream on a damp ground-cover of leaves. The specimens from Cheju Do were taken in early September, one in a grassy area, and the other two on earthen banks of road-cuts on the slopes of Halla San. The stomach of one individual from Cheju Do contained an earthworm. Our largest specimen, a male having 154 ventrals and 68 subcaudals, measured 508 (380 + 128). The subcaudal counts of 68 (KU 38861) and 69 (UMMZ 113461) on two males from Cheju Do are higher than the maximal count known for the subspecies _ruthveni_ in Korea, and resemble those of _Amphiesma vibakari vibakari_ of the Japanese islands. The subcaudals average 61 (55-65) in _ruthveni_ and 71 (63-83) in _vibakari_ according to Van Denburgh (1923:3-4). A juvenile from the Central National Forest (KU 38862), lacking the tip of the tail, has 64 subcaudals. =Dinodon rufozonatum= (Cantor) _Lycodon rufo-zonatus_ Cantor, Ann. Mag. Nat. Hist., ser. 1, 9:483, August, 1842 (type locality, island of Chusan, China). _Dinodon rufozonatus_, Peters, Sitzungsber. Gesell. naturf. Freunde Berlin, p. 89, 1881. _Specimens examined_ (4).--Central National Forest, near Pup´yong-ni, 3 (KU); Yongsan (Seoul), 1 (UMMZ). _Remarks._--The three specimens from the Central National Forest were taken in the period August 12-26. Two were caught in live-traps set for small mammals in deep forest among granite outcrops. The specimen from Yongsan was obtained on October 27 in a partly wooded area. Ventrals and subcaudals of our four specimens (all males) numbered, respectively, 198, 200, 198, 205, and 74, 75, 75, __. Total length of the largest specimen was 960 (790 + 170). We follow Chang (1932:54) and most subsequent authors in regarding _D. rufozonatum_ as a monotypic species. =Zamenis spinalis= (Peters) _Masticophis spinalis_ Peters, Monatsber. preuss. Akad. Wiss., Berlin, p. 91 (for 1866), 1867 (type locality, unknown--"Mexico" erroneously listed). _Zamenis spinalis_, Günther, Ann. Mag. Nat. Hist., ser. 4, 9:22, January, 1872. _Specimens examined_ (2).--5 mi. ESE Seoul, 1 (KU); 6 mi. NNE Sogwi-ri, Cheju Do, 1 (KU).