Distribution of Oligodon hamptoni (red) and Oligodon lacroixi (blue). Star denotes the type locality. Localities: (1) Mogok, Pyin Oo Lwin District, Mandalay Region, Myanmar (type locality see Boulenger 1918); (2) Sinumkaba, Bhamo District, Kachin State, Myanmar (Wall 1925); (3) Tengchong City, Yunnan Province, China (this paper); (4) Chapa (now Sa Pa), Lao Cai Province, Vietnam (Angel and Bourret 1933; Orlov et al. 2010); (5) Jinping County, Honghe, Yunnan Province, China (Yang and Rao 2008); (6) Mengzi, Honghe, Yunnan Province, China (He and Yang 1979); (7) Panzhihua, Sichuan Province, China (Zhao 2006).