Correlation analysis of the number of larvae per nest with gall dimensions suggests that gall size is the limiting factor for females of aculeate hymenopterans.

To analyze the correlations of gall width, stem width, and number of larvae, we calculated linear correlation coefficients r, and Spearman´s D for each species with more than five individuals. To perform this analysis, we merged our data with the data set obtained by [6]. Besides the species-specific correlations, we also calculated the correlation for random galls (all those collected in 2014 and 2015).