The two females i had died. The second female probably mated but she did not lay eggs. I unintentionally killed one L1 larva while looking for it and there are about 4 or so more covered up holes that I guess have larva. I am hoping they live. I have also found two dead philaurus and one dead L. elaphas and another living female D. tityus (which I have now but dont have a male). I was lucky to find those beetles. I also found a whole lot of dead Xylorysticus in Virginia in a gass statio...
.....gas station that had a river close to it. I found two living Xylorysticus (one female, male) at a wilco station close to our house in North Carolina. They both looked healthy but the male died the next day. Maybe because he mated (not sure if they mated). The female is living right now with rotting wood in her container.
I see. It's cool to see that you are living in a place where u can find all sorts of rare beetles Hope u succeed in breeding Dorcus brevis and Xyloryctes.
Usually, Xyloryctes are found in large numbers under single ash tree, which is believed to be their host plant. So I would suggest looking for ash trees in the area where u found the adults if u plan on collecting more