Revista Brasileira de Entomologia: www.scielo.br/rbent Revista Brasileira de Entomologia: online ahead of print ISSN 1806-9665 online | 0085-5626 print In Brazil, some phytophagous Scarabaeidae species are related, causing damage in crops, which requires in many situations the use of control techniques to decrease the population density of these insects. Therefore, in addition to direct damages in crops, this group can cause increased in production costs. According to Studying the biology of this group of pests is a very complex undertaking, since their soil-inhabiting behavior and feeding on plant roots where they complete their cycle make observations and measurements are difficult to obtain. Therefore, information on aspects related to the biology of pest Scarabaeidae species is scarce. With respect to the subfamily Melolonthinae in Brazil, there are known studies on the biological aspects of Phyllophaga triticophaga Morón & Salvadori, 1998), P. cuyabana (Moser, 1918) (Oliveira et al. 199
