A large number of streams throughout the territory of Hong Kong were sampled for dragonfly larvae between 1991 and 1995. Streams in 2 locations were found to support extremely diverse and abundant populations of gomphids and macromiines. The site details and characteristics of these 2 stream localities at Sha Lo Tung and Tai Tong are described together with information on all odon. spp. found at these sites. The odon. populations of both sites are important internationally and are threatened by developmental pressures. A brief account of these threats is provided.