Figure 2.

Species accumulation curves for mosquitoes, sand flies and biting midges relative to the number of sampling events in Kessipoughou (a) and Djibilong (b) caves. Curves show the cumulated species richness (S values) of Diptera groups according to sampling events. Sampling representativeness seemed good for each insect group in both caves, with the exception of mosquitoes in Djibilong. The lack of representativeness for the mosquito community inside Djibilong cave was confirmed by the important number of estimated non-sampled species (NS = 13.1, Table 1), extrapolated from the Chao index.