Dataset description for: JEB-2017-00575_suppmat Phenotypic integration in an extended phenotype: among- individual variation in nest-building traits of the alfalfa leafcutting bee (Megachile rotundata) Supplementary data (Appendix S1, Figure S1, Table S2) Raphael Royauté, Elisabeth S. Wilson, Bryan R. Helm, Rachel E. Mallinger, Jarrad Prasifka, Kendra J. Greenlee, Julia H. Bowsher (Journal of Evolutionary Biology 2018) Corresponding author: Raphaël Royauté (raphael.royaute@gmail.com) Dataset Description: Larval mass and sex of 30 additional nests collected in a sunflower field Column description: General information columns: Nest_Id: Indicates the Id code for each nest Larval.Mass: Mass of each larvae at the prepupal stage (in mg) Sex: Sex of each larvae assigned after maturation Sex_binom: Binomial coding of the Sex column (0 = males, 1 = females)