Based on the Duncan's multiple range test (DMR), 18 members of the nasuta-albomicans complex of Drosophila are constructed into clusters and named in the hierarchical form from the lowest to the highest mean wing length. The members belonging to each cluster have insignificant differences. In males, (Fig. 1a), females (Fig. 1b) and both males and females together (Fig. 1c), 8 clusters are made. In males, cluster 1 (C8) with only one member forms an independent cluster, while N, A and C2 emerged as independent (Fig. 1c) as well as overlapping clusters (Fig. 1a and 1b) from the other clusters. All others are with overlapping clusters.