To avoid any confusion: Dr. Burrows dust mite is an arachnid (hence, related to spiders) and not an insect. But it is evident that evolutionary pressures down in the Deeps have been responsible for a number of specific adaptations: The so-called cave cows possess three pairs of legs (not that uncommon with mites), while the fourth pair of legs may have evolved into what Dr. Burrows perceives to be its "antennae" and "mandibles." The authors will be attempting to capture a specimen for further study, and their findings will be posted on www.tunnelsthebook.com in due course. Thank you.