Abstract: The authors have carried out a faunal expedition on rodents in Dzungaria, Xinjiang during 1974-1976,and a 4-month's stationary observition on the ecology of Yellow steppe lemming at Dashitou, Mulei, in 1976. The scientific results are as followings.1. In Xinjiang the lemming in habits only in Dzungaria. In the time of overproduction it inhabits nearly all the open landscapes, except sandy and stony deeserts as well as eminences. However in the time of considerable lower density of its population, it is being only kept at a few places.2. The rodent always uses only 3-5 entrances of his tunnel system, though tnere are a lot of entrances there.3. The lemming is active in daytime. In summer its diet is mainly the vegetative parts of plants, and in autumn it eats also wheat and other seeds. From June up to the end of September in that year we have diged out 6 colonies, no winter food storage has ever been found.4. The colonies are very unevenly spreaded inside of its habitat, and the places of its colonies continually are changed seasonally with the changeable surrounding conditions.5. At Dashitou region, the reproductive seaaon of the lemming began from first ten-days period of April and approximately ended on the first half of September in 1976. Among the young animals only the females, born before June, had time to be sexnal mature and they could taken part actively in the July reproduction. And the young males are sexually mature much later than the young females. During the summer in that year most of the adult females had two litters, but the young females only one, litter size being 2-11.

摘要： 黄兔尾鼠(Lagurus luteus)为我国新疆北部地区的特有种。据Громов等(1977),青海和蒙古高原地区的黄兔尾鼠应属另一种(L.Przewalskii)。以往仅有少量蒙古黄兔尾鼠的生态资料(Allen 1940,Ъанников1954,ЛАБУНЕЦ1968)。一直到1968年,黄兔尾鼠数量骤然升高,一部分黄兔尾鼠移入苏联斋桑盆地的东部,иСМАГИЛОВ等(1969)才做了一些观察和报道。由于该种的数量波动极大,在低数量年份连其踪迹也不易寻觅,故我国也无人对其分布和生态专门进行研究。1974—1976年作者于新疆北部地区进行了鼠类区系调查,并于木垒县大石头公社连续做了4个月(1976年6—9月)的野外观察,现简报如下。