Comparing structural parameters: a) background density vs. average density. Cluster radius compared to b) average density; c) core density; and d) distance. e) core radius vs. core density. Age correlations with f) core density; g) the fraction of cluster members showing excess in the K-band; and h) E(B − V). Dotted lines indicate A_V ~ 1 mag and the limit of f_K = 20%. Triangles are used to indicate objects with two options of age (filled symbols correspond to the first choice, listed in Table 2).