Male Lipolexis scutellaris are always polygynous while females restrictedly monandrous and thus inseminates only once in her life. The results indicated following: (1) total progeny production by the female is decreased considerably (122.66[plus or minus]1.14 SD to 47.21[plus or minus]3.34 SD progeny/female-one hour rest copulation and 105.66[plus or minus]2.30 SD to 42.81[plus or minus]1.78 SD progeny/female-4 h rest copulation) (2) there is no variation in progeny sex ratio of the first four females copulated by a single male in a succession (0.33[plus or minus]0.01 SD to 0.36[plus or minus] 0.01 SD) (3) the last female in series produced equal proportion of sons and daughters (4) the generalised reproductive index (GRI) shows that the most productive female, which was first in series, and successively decreased with multiple mated male. No significant variation was observed caused by 4 h rest given to males between two successive matings but only mean number of fecundity was affected. Regression of progeny sex ratio (Y) and total progeny (X) resulted significant negative linear correlation coefficients when the females were mated by a multiple mated males (Y = 0.6598 [long dash] 0.0016 X, r= - 0.603, P < 0.001). So, results indicates that the males L. scutellaris have a great power of mating ability and ejaculate only that amount of sperms into the females that are sufficient enough to fertilise a considerable number of eggs retaining still a higher number of sperms for ejaculation in successive matings. Lipolexis scutellaris (Aphidiidae) Reproduction; Gametes; Reproductive behaviour; Reproductive productivity Lipolexis scutellaris; Sperm; Mating; Multiple mating by male influence on female fecundity & progeny sex ratio; Fecundity none