Location of the sources in clusters 1, 2, 3, 4, and 5 overlaid on the extinction map of Dobashi et al. (2005) in Galactic coordinates. The size of the symbols has been rescaled between the minimum and maximum parallaxes observed in each cluster to better distinguish between the closest (big symbols) and most remote (small symbols) members within each cluster. Filled and open symbols indicate, respectively, cluster members and outliers that have been removed in our analysis (see Sect. 4.3). The vectors indicate the stellar proper motions converted to the Galactic reference system (not corrected for solar motion). The position of the most prominent clouds (Barnard 1927; Lynds 1962) is indicated in the diagram with black triangles.