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本文报道了１９６４和１９９２年对兰州市蚤类组成，黄鼠体蚤和洞干蚤等重要蚤种的生态学研究。通过比较，间隔２８年重要蚤种的季节消长基本一致。
This paper reports the ecological studies on the composition of fleas, fleas and cave fleas in Lanzhou from 1964 and 1992. By comparison, the seasonal fluctuations of important flea species separated by 28 years were basically the same.