Factors explaining numbers of enemy species and parasite-inflicted mortalities in individual galler species. Each point in the plots represents one galler species. (A) Numbers of associated enemy species in relation to gall types and sample sizes. Lines show logarithmic regression curves for each gall type. (B) Average parasite-inflicted mortalities of individual galler species  in relation to their gall types and numbers of associated parasite species. Lines are not shown for petiole gallers that are represented by a single species (triangle). ANCOVA results for (A) and (B) are given in Tables 1 and 2, respectively.