During research experiment involving parasitism of third instar larvae and pupae of Chrysomya megacephala (Fabricius, 1794) in Rio de Janeiro city, Brazil, it was found 1.83% of multiparasited pupae in Instituto Oswaldo Cruz (IOC) and 2.16% in Jardim Zoológico (ZOO). The exposition were conducted weekly from August 1999 to July 2000. The multiparasited pupae contained two Hymenoptera parasitoids species [Tachinaephagus zealandicus Ashmead, 1904 and either Pachycrepoideus vindemiae (Rondani, 1875) or Nasonia vitripennis (Walker, 1836)]. 72.73% of the multiparasitism occurred at ZOO in July. T. zealandicus and P. vindemiae supported their respective gregarious and solitary natural conditions, respectively, but N. vitripennis sometimes behaved as solitary.
Nasonia vitripennis; Pachycrepoideus vindemiae; synanthropic flies; Tachinaephagus zealandicus
