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Show 50 MR. W. LECHE ON CHIROPTF.RA FROM AUSTRALIA. [Feb. 5, The first lower premolar is as high as the cingulum of the second. Measurements (female). millim. Length, head and body 57 head 21 ,, tail 33 ,, tail, free from membrane 12 ,, ear, outer margin .... 16 ,, tragus 3 ,, forearm 34 „ third finger, metacarpal 36 ,, fifth finger, metacarpal 24 ,, tibia 10 The male is considerably smaller. Hab. South Australia. 2. NYCTINOMUS ALBIDUS, sp. nov. This species is most nearly related to Nyct. australis, Gray, which has otherwise a rather isolated position in the genus. From the last-named form it deviates through the facts :-(1) that the ears are much longer than the head and united by a low band, whereas in Nyct. australis they are shorter than the head and separate ; (2) the integument forming the ear-conch is thick and opaque, whereas in Nyct. australis it is rather thin ; (3) in Nyct. australis a narrow band of hair extends outwards behind the forearm and covers the Fig. 3. Nyctinomus albidus; natural size. space between it and the upper third of the fourth metacarpal ; this covering of hair is lacking in Nyct. albidus; (4) concerning the adult male of Nyct. australis, Dobson (Catalogue of Chiroptera in British Museum, 1878, p. 433) states that " the fur covering the wing-membrane beneath, between the humerus and femur and the sides of the body outwards, is pure white, contrasting strongly with the dark-brown fur of the body," and furthermore that it is provided |