1. Cynops cyanurus chuxiongensis is distributed on the mountainous areas of Chuxiong and adjacent areas, Yunnan at an altitude of 2100-2400m. 621 adult newts were collected in 2-4 August, 1980. The sexual proportion was 1.91: 1. During breeding season, the males have change in their appearance as: cloa-cal region is largely swelling; the tail appears a whitish blue; the orange of the venter becomes darker.2. Under the natural conditions mating and spawning of this newts are carried out in shallow calm water...