Is there anyone that has kept both Lucanus elaphus and Lucanus (sometimes listed as Pseudolucanus) capreolus that could help me visualize the differences in their larvae? I know there is supposed to be something about a ratio involving the heads, but I haven't found a good explanation of how exactly to measure that. I live in an area with both species, but all the larvae I've collected within a couple miles of my house have ended up being elaphus. Before I send some larvae to other people though I would like to try and rule out capreolus.
