The developmental time of immature stages, developmental rate, longevity, fecundity and life table parameters of Trissolcus basalis (Wollaston) were investigated at three temperatures (24, 28 and 31^oC). The data reveled that there was a significant variation in the developmental time of immature stages between the three tested temperatures. The higher developmental rate was recorded at 31^oC. There were significant differences between the three temperatures in percentage of parasitized eggs and sex ratio, while there was no significant difference in percentage of successful parasitism. The female sex ratio was 4:1 (females: males) at 28and 31^oC,while it was 3:1 at 24^oC. There was a significant difference in longevity of females. It was 14.40±1.43, 13.40 ±0.46 and 9.00±2.08 at 24, 28 and 31^oC, while there was no statistical variation in the fecundity of T. basalis females reared at the three tested temperatures. The simple linear regression between temperatures and longevity of T. basalis females indicated that there was a highly relationship between temperatures and longevity. In addition, there was a positive relationship between the temperatures and fecundity. The calculated value of (T) and (DT) was higher at 24^oC than 28 and 31^oC. In contrast, GRR, R_o, r_m  and λ values were higher at 31^oC than 24 and 28^oC. The survivorship (Lx) for female age was higher (0.82) at 28^oC than at 24and 31^oC. There was a significant difference between ages of the host egg masses in choice and non-choice tests. The first age (one day old) was preferred than the other ages. Moreover, the parasitoid was able to parasitize the host eggs in all developmental ages. The present investigation provided useful information of some biological aspects of T. basalis.  In conclusion, T. basalis appears to be a promising biological control option for controlling the green stink bug, N. viridula.