Benthic aquatic insects were sampled by a qualitative collection method at 9 sites in the main waterbody of Mt. Lushan Nature Reserve during May and November of 1996. A total of 10598 individuals were collected, they belonged to 111 species of 73 genera in 46 families under 16 orders of aquatic insects and oligchaeta. Among the samples collected, 3106 of them were of oligchaeta and other animals. Water quality of 9 sites were evaluated by the biotic index at the Family-level of the insects and general chemi...