Abstract: Opius caricivorae Fischer is a major lavalpupal endoparasitoid of Liriomyza sativae Blandchard. The adult biology of this parasitoid was investigated under laboratory conditions using L. sativae on the bean Phaseolus vulgaris L.as the host. The adults emerged by daylight, with the peak emergence at 8:00-10:00, and 91% of them mated on the day of emergence. Femalebiased adult sex ratio were found in laboratory populations (♀∶♂=1.51∶1). Longevity of both female and male adults decreased with the increase of temperatures from 17℃ to 33℃ when honeybee solution was provided. Mean longevity of females was longer (81 d at 17℃ and 14 d at 33℃) than that of males (47 d at 17℃ and 13 d at 33℃). Female adults started oviposition on 1-2 d with the peak occurring on 2-7 d after emergence at temperatures from 21℃ to 29℃.The relationship between average fecundity and temperature could be fitted to the equation　=-0.057x^{2+2.728x- 20.601 (r2=0.934). The females were able to kill hosts by stings. Feeding,oviposition and ost-searching behaviors of the parasitoids are also described.}

Key words: Liriomyza sativae Blandchard, Opius caricivorae Fischer, emergence, longevity, oviposition