---

The key in volume 1 of the Manual of Afrotropical Diptera will enable you to identify your samples to family. While the keys are technical, there's no easy way round that if you require accuracy (which I assume you do for your studies). As with any study, once you get to know the terminology, things are much easier. If you have the opportunity to visit a museum with good Afrotropical collections, that can be a way to familiarize yourself with many of the species.