On another occasion, he was exploring a cave near the centre of Palestine, when he succeeded in procuring some specimens, and therefore in identifying at least one species. "In climbing the rocks soon afterwards, to examine a cave, I heard a singular whining chatter within, and on creeping into its recesses, a stone thrown up roused from their roosting-places a colony of large bats, the soft waving flap of whose wings I could hear in the darkness. How to obtain one I knew not; but on vigorously plying my signal whistle, all the party soon gathered to my help. B. suggested smoking them, so a fire of brushwood was kindled, and soon two or three rushed out. Two fell to our shot, and I was delighted to find myself the possessor of a couple of large fox-headed bats of the genus Pteropus (_Xantharpya ægyptiaca_), and extending twenty and a half inches from wing to wing. As none of the bats of Palestine are yet known, this was a great prize, and another instance of the extension westward of the Indian fauna." These Bats belong to the fruit-eating tribe, and are closely allied to the Flying Foxes of Java, Australia, and Southern Africa. Therefore, this would be one of the species commonly used for food, and hence the necessity for the prohibition. The present species extends over the greater part of Northern Africa and into parts of Asia. The same traveller subsequently discovered several more species of bats. On one occasion, he was exploring some caves, near the site of the ancient Jericho. On the eastern face of the cliffs are a number of caves, arranged in regular tiers, and originally approached by steps cut out of the face of the rock. These staircases are, however, washed away by time and the rains, and in consequence the upper tiers were almost inaccessible. In some of these caves the walls were covered with brilliant, but mutilated frescoes; and in others, hermits had lived and died and been buried. Mr. Tristram and his companions had penetrated to the second tier, and there made a curious discovery. [Illustration: THE BAT. "_The Lapwing and the Bat are unclean._"--LEV. xi. 19.]