1 Laboratory of Aquatic Entomology, Department of Hydrobiology, Federal University of São Carlos, P.O. Box 676, 13565-905, São Carlos, SP, Brazil; Email: fabelha@hotmail.com.
2 Museum of Zoology, University of São Paulo, Av. Nazaré, 481, 04263-000, São Paulo, SP, Brazil; Email: umukusum@mail.ru.