We should compare this Beetle Mite with the Water Mite, and notice the difference in the mouth parts and the legs, which have a large pad between the claws. We may find another Beetle Mite, closely allied to this species, on the Devil’s Coach Horse, and some of its near relations. This Mite was also known to De Geer[38], whose remarks upon it are worth quoting, in a condensed form. He found a beetle covered with these Mites, and on examining them with a hand lens saw that they were attached to their host by a long thread or stalk, which came from the posterior end of the body. Several Mites, he tells us, were joined together by one thread which fastened them all to the beetle; and he came to the conclusion that the parasites were nourished at the expense of the beetle, the thread serving to convey the juices of its body to them. ‘It is very singular,’ he says, ‘to see living insects planted on the body of larger insects, from which they draw their subsistence by means of a thread or stalk.’ And then he goes on to compare these ‘vegetative Mites,’ as he calls them, with the ‘eggs’ of the Water Mites, which he found on Dytiscus and the Water Scorpion. The thread exists, and the Mites are attached by it to their host, but they do not draw nourishment through it from the beetle, for it is composed of their excrements. The Myriapods are worm-shaped creatures, breathing by means of air-tubes, and furnished with a number of limbs closely resembling each other. There are two groups: the Centipedes and the Millepedes. The former have the body flattened, with one pair of appendages to each segment, the first pair being modified into piercing poison-organs, and they feed on living prey. The body of the Millepedes is round, with two pairs of appendages to each segment; they have no poison-organs, and their food consists chiefly, if not entirely, of vegetable matter.