拟孔蜂巨柄啮小蜂Melittobia acasta Walker是一种可以寄生家蝇Musca domestica L.的寄生蜂。首次报道食物对该蜂寿命的影响，以及该蜂日龄、家蝇蛹龄、寄生蜂密度和蝇蛹密度与寄生率的关系。以15%糖水饲养该小蜂寿命最长；单只啮小蜂最多可以寄生8只蝇蛹，最大出蜂总量达58只；单个蝇蛹最多出蜂22只；随着寄生蜂的日龄和蝇蛹日龄增加，该蜂对蝇蛹的寄生个数有下降的趋势，寄生率和寄生蜂日龄符合y=3.36-0.062x-0.045x²，寄生率和蝇蛹日龄符合y=2.50+0.91x-0.34x²；蝇蛹的密度对小蜂的寄生率的影响拟合Holling功能反应模型：N_a=0.6165TrN_0(1+0.6165×0.499 N₀)；寄生蜂自身密度对寄生率的影响符合方程：

a=0.4943P^-0.306。

Melittobia acasta Walker is a parasitoid of Musca domestica. The effect of food on longevity of M. acasta, and the effect of the age of the parasitoid and pupae, the densities of the parasitoid and fly's pupae on parasitism rate were studied. The results showed that M. acasta fed with 15% glucose solution had the longest longevity. An individual of M. acasta could lay eggs in up to eight fly pupae of M. domestica, and could reproduce 58 progenies. Up to 22 progenies would be reproduced in one pupa. The parasitic rate decreased with the increment of the age of M. acasta and M. domestica pupae. The relationship between the parasitic rate (Y) and the age of the parasitoid(X) was y=3.36-0.062x-0.045x², and the relationship between the parasitic rate (Y) and the age of the pupa(X) was y=2.50+0.91x-0.34x^2 The relationship between the density of M. domestica and the parasitic rate could be described by Holling Model Na=0.6165TrN₀(1+0.6165×0.499 N₀), and the relationship between the density of M. acasta and the parasitic rate was a=0.4943p^-0.306.
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