Treatment: combination of age and developmental experience. Newly Emerged are less than 24 hours post adult eclosion at time of sacrifice. Isolated and Social are 58 to 71 days post adult eclosion and were have been in isolation since adult eclosion or raised with sisters on the nest respectively. WaspID: ID code used for individual in the experiment to match brain volume with body size wing_length: length of wasp wing in mm hind_tibial_length: length of wasp hind tibia in mm throax_width: width of wasp thorax in mm log_wing_length: log transformed wing_length PC1: A PC1 value derived from hind_tibial_length, thorax_width, and log_wing_length. Calculated in R and rotated in PC space such that all PC1 values were positive. Lobula: volume of lobula in cubic microns AL: volume of glomerular and aglomerular region of the antennal lobe in cubic microns AOT: volume of anterior optic tubercle in cubic microns Lip.M: medial mushroom body calyx lip volume in cubic microns basal_ring.M: medial mushroom body calyx basal ring volume in cubic microns Collar.M: medial mushroom body calyx collar volume in cubic microns Lip.L: Lateral mushroom body calyx lip volume in cubic microns basal_ring.L: Lateral mushroom body calyx basal ring volume in cubic microns Collar.L: Lateral mushroom body calyx collar volume in cubic microns Lip.T: Summed Lip.M and Lip.L values. If both values were missing listed as NA. If one measure present this value was estimated by doubling the present value. basal_ring.T: Summed basal_ring.M and basal_ring.L values. If both values were missing listed as NA. If only one measure present this value was estimated by doubling the present value. Collar.T: Summed Collar.M and Collar.L values. If both values were missing listed as NA. If one measure present this value was estimated by doubling the present value. Medulla: medulla volume in cubic microns MB.T: Summed Lip.T, basal_ring.T, and Collar.T values to estimate the total mushroom body calyx volume in cubic microns. Listed as NA if any of the subregion totals was listed as NA. OpticLobe.T: Summed Lobula and Medulla volumes in cubic microns.