This is the pre-peer reviewed version of the following article: The potential of parasitoid Hymenoptera as bioindicators of arthropod diversity in agricultural grasslands 2011, 48 (2):382 Journal of Applied Ecology, which has been published in final form at: http://doi.wiley.com/10.1111/j.1365-2664.2010.01937.x, 1. As…