关键词: 双翅目, 蚋科, 生态学, 密度, 世代

Abstract: The ecological observation of the larval and pupal (Diptera: Simuliidae) had been carried out in some streams at the mountain of Dali suburban district at sea level 1600-2400 M for 14 Months. The contents observed were recorded once in every week, including pH of chemical specific conductivity, the variable temperature of outdoor water, the current velocity , depth and width of water and seasonal changes of climate which influenced the density of larva and pupalas well as the growth time, 2-4 generations a year observed, 12 species were found which were S.(S). himalayense Puri. 1932, S. (S) .chamlongi Takaoka. 1983, S rafibasis Branetti. 1911, Eusimulium aureohirtum. Branetti. 1911, E.sivestre. Rubzov. 1956, Simulium.(S) sakishimaeense Takaoka. 1977, and the other six new siecies : Eusimulium cangshanense. sp, Eusimulium montium. sp, E .xiaguanense. sp, Simulium tanae. sp, Titanopteryx kirgisorum. sp, T.tanae. sp, six new species were reported by author in 1986-1990.