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larvae is Tabanidae and the fact that the eggs are laid in a single layer my first guess was Chrysops spec. However I cannot rule out Haemotopota or perhaps even Philipomyia/Silvius ? Chrysops prefer more or less moist habitats, while the other are more found in arid/dry areas. I'm not that familiar with egg cases within Tabanids but the number of layers differ with genera.