The camel crickets of the family Rhaphidophoridae are the cave crickets of the insect world: wingless, humpbacked, and built for jumping. Diestrammena japanica is one of the better-known species, a native of Japan that has hitched rides around the globe.
Outside its native range, particularly in the eastern United States, it is recognized as an invasive species, often turning up in basements and damp crawl spaces. On Rinjani, though, it was just a shy jumper doing its best impression of a shadow in a damp hollow.
Its long antennae and oversized hind legs make it unmistakable, if you are quick enough to see it before it leaps.
