The following information accompanied stocks donated to the Bloomington Drosophila Stock Center by Vivek Jayaraman, Howard Hughes Medical Institute, Janelia Farm. Note: the original name is indicated for each. The names were changed to indicate that these constructs and insertions are fly codon optimized and contain a different N-terminus than that published in Klapoetke et al., 2014 Nature Methods 11(3):338 (FBrf0224260) - see the associated Corrigendum. P{20XUAS-IVS-CsChrimson.mVenus}attP40 (original name P{20XUAS-IVS-Chrimson.mVenus}attP40) is a homozygous viable and fertile insertion on the second chromosome in the attP40 site (25C6, 2L:5108448 ). P{20XUAS-IVS-CsChrimson.mVenus}attP2 (original name P{20XUAS-IVS-Chrimson.mVenus}attP2) is a homozygous viable and fertile insertion on the third chromosome in the attP2 site (68A4, 3L:11063638 ).