Examples of Selenops (Clubionidae) lie flat and absolutely still on the bark of trees, to which their coloration assimilates, and spring like a flash of light upon any insect that touches their legs; the Lycosidae dart swiftly upon their prey; and the Salticidae, which compared with other spiders have keen powers of vision, stealthily stalk it to within leaping distance, then, gathering their legs together, cover the intervening space with a spring and with unerring aim seize it and bury their fangs in its body.
If the wing of a gannet, just shot, be removed and made to flap in what the operator believes to be a strictly vertical downward direction, the tip of the wing, in spite of him, will dart forwards between 2 and 3 ft.
As, however, the animals referred to do not actually fly, but merely dart into the air and there sustain themselves for brief intervals, they afford no real support to the theory.
The lord mayor of Cork was created admiral of the port, and this office is manifested in a triennial ceremony in which the mayor throws a dart over the harbour.
Startled, she watched him dart towards Dusty.
The bridge over the East Dart near Tavistock had three piers, with slabs FIG.
When concealment is no longer possible terrestrial species, like the Lycosidae, dart swiftly to the nearest shelter afforded by crevices in the soil, stones, fallen leaves or logs of wood, while those that live in bushes, like the Argyopidae, drop straight to the ground and lie hidden in the earth or in the fallen vegetation beneath.
It is a peculiarity of natural wings, and of artificial wings constructed on the principle of living wings, that when forcibly elevated or depressed, even in a strictly vertical direction, they inevitably dart forward.
It may be that in the distance a fish describes an arc of three or four feet in the air, and there is one bright flash where it emerges, and another where it strikes the water; sometimes the whole silvery arc is revealed; or here and there, perhaps, is a thistle-down floating on its surface, which the fishes dart at and so dimple it again.
Again, if the dart be successful, then at the second critical instant, that is, when the whale starts to run, the boatheader and harpooneer likewise start to running fore and aft, to the imminent jeopardy of themselves and every one else.