Description of immature stages of Platycoelia valida Burmeister, 1844 (Coleoptera: Melolonthidae: Rutelinae: Anoplognathini). Third instar larva and pupa of P. valida are described for the first time based on specimens collected in soils of yucca and coffee fields in Cundinamarca, Colombia. Illustrations of diagnostic structures and keys to the known third-stage larvae of Rutelinae tribes and Platycoelia species are included. Data on the biology and distribution of P. valida in Colombia are also commented.