Continue to turn the pages. We now come to insects. The most frequent are Diptera, of moderate size, often very humble Flies and Gnats. The teeth of the great Squali surprised us by their smooth polish amid the roughness of their chalky matrix. What shall we say of these frail Midges enshrined intact in their marly reliquary? The feeble creature, which our fingers could not pick up without crushing it, remains undisturbed beneath the weight of the mountains! The six slender legs, which the least touch is enough to disjoint, lie spread upon the stone, correct in shape and arrangement, in the attitude of the insect at rest. There is nothing lacking, not even the tiny double claws at the end of the tarsi. Here are the two wings, unfurled. The fine network of their veins can be studied under the lens as clearly as in the Fly of our collections, stuck on a pin. The antennary plumes have lost none of their fragile grace; the abdomen gives us the number of the segments, edged with a row of specks which once were cilia. Even the carcase of a Mastodon, defying time in its sandy bed, fills us with amazement; a Gnat of exquisite delicacy, preserved intact in the thickness of the rock, staggers our imagination. Certainly, the Mosquito, borne along by the floods, did not come from far away. Before he arrived, some turbulent streamlet must have reduced him to the nothingness to which he was already so near. Slain by the joys of a morning—a long life for a Gnat—he fell from the top of his reed, was straightway drowned and disappeared in the muddy catacombs. Who are these others, these dumpy creatures, with hard, convex wing-cases, which next to the Flies are the most numerous. Their small heads, prolonged into a snout, tell us beyond dispute. They are proboscidian Beetles, Rhynchophoræ, or, in simpler terms, Weevils. There are small ones, middling ones, large ones, similar in dimensions to their counterparts of to-day. Their position on the limestone slab is not as correct as the Mosquito’s. The legs are entangled anyhow; the beak, the rostrum, is now hidden under the breast, now projects forward. Some display it in profile; others—more frequent these—stretch it to one side, as the result of a twisted neck. These contorted insects, with their dislocated members, did not receive the swift and peaceful burial of the Flies. Though sundry of them may have lived on the plants by the shore, the others, the majority, come from the surrounding parts, carried by the rain-water, which warped their joints in crossing such obstacles as twigs and stones. A suit of armour has kept the body unscathed, but the delicate articulations of the members have given way to some extent; and the muddy winding-sheet received the drowned Beetles as the ravages of the journey left them.