There are several varieties (some of them peculiar to the island) of the horse-shoe-headed _Rhinolophus_, with the strange leaf-like appendage erected on the extremity of the nose. It has been suggested that bats, though nocturnal, are deficient in that keen vision characteristic of animals which take their prey at night. I doubt whether this conjecture be well founded; but at least it would seem that in their peculiar oeconomy some additional power is required to supplement that of vision, as in insects that of touch is superadded, in the most sensitive development, to that of sight. Hence, it is possible that the extended screen stretched at the back of their nostrils may be intended by nature to facilitate the collection and conduction of odours, as the vast development of the shell of the ear in the same family is designed to assist in the collection of sounds--and thus to reinforce their vision when in pursuit of their prey at twilight by the superior sensitiveness of the organs of hearing and smell, as they are already remarkable for that marvellous sense of touch which enables them, even when deprived of sight, to direct their flight with security, by means of the delicate nerves of the wing. One tiny little bat, not much larger than the humble bee[1], and of a glossy black colour, is sometimes to be seen about Colombo. It is so familiar and gentle that it will alight on the cloth during dinner, and manifests so little alarm that it seldom makes any effort to escape before a wine glass can be inverted to secure it.[2] [Footnote 1: It is a _very_ small Singhalese variety of Scotophilus Coromandelicus; _F. Cuv_.] [Footnote 2: For a notice of the curious parasite peculiar to the bat, see Note A. end of this chapter.]