Found on the ceiling/wall of the cave, not far from the entrance.
This small Machiloides was in the twilight area of the cave, but in the darkness under a boulder. This was the smallest of three that were all next to each other. The body is about 6mm long. It appeared much lighter than the others next to it, and on closer inspection appears to not have its outer skin of scales.
This bristle tail was in the deepest, darkest part of the twilight zone.
Found in the gaps between boulders in the boulder choke entrance.
Stylus on second and third leg pairs. Claws => male. There were two bristletails well into the entrance boulder choke. This habitat is very similar to observation https://www.inaturalist.org/observations/204799135. The entrances to the caves are holes filled with a pile of boulders, and the bristletails are found on the bottom of the lowest boulders. There are probably more living inside the boulder choke in cavities too small for me to access.
An adult and a juvenile were on the wall of the cave in the large entrance chamber. Although this part of the cave is not completely dark all the time, light levels are very low. The other specimens were hidden under the boulder collapse that forms the entrance to the cave.