Anastrepha bistrigata; Anastrepha fraterculus; Anastrepha obliqua; Anastrepha sororcula; Ceratitis capitata; HYMENOPTERAN-PARASITES; Braconidae; Prevalence, Brazil TEPHRITIDAE-; HYMENOPTERAN-PARASITES; Braconidae, Diapriidae & Eucoilidae; Prevalence; BRAZIL-; Sao Paulo, Limeira & Piracicaba; Prevalence of hymenopteran parasites Alysiinae; Opiinae; DIPTERAN-HOSTS; Tephritidae; Prevalence, Brazil BRACONIDAE-; DIAPRIIDAE-; Eucoilidae; DIPTERAN-HOSTS; Tephritidae; Prevalence; BRAZIL-; Sao Paulo, Limeira & Piracicaba; Prevalence in dipteran hosts Parasitoids were reared from tephritid puparia collected from 20 host fruit species in Limeira and Piracicaba, State of Sao Paulo, from October 1987 to November 1988. A total of 424 parasitoids of the family Braconidae (Opiinae and Alysiinae) together with 25 specimens of Eucoilidae and Diapriidae were collected. Only five fruit fly species could be associated with braconid species. The majority of parasitoids belonged to the subfamily Opiinae namely Doryctobracon areolatus (Szepligeti), D. brasiliensis (Szepligeti), Opius bellus Gahan, Opius sp. and Utetes (Bracanastrepha) anastrephae (Viereck). D. areolatus was the most common species. Asobara anastephae (Muesebek) was the unique species of Alysiinae collected. The highest parasitism rate by braconids reached 22.4% for fruit flies larvae/pupae in star fruit, Averrhoa carambola. The lowest level of parasitism was found in peach, Prunus persica (0.6%). Average parasitism rates ranged from 0.6 to 11.0% for Tephritidae larvae on host plants, with a mean of 4.8%.