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Show 1873.] CHARACTERS IN THE CHIROPTERA. 247 mais elle est moins grande chez les jeunes Les femelles n'ont point de siphon " A The same writer notices the presence of a gular pouch in the males only of Dysopes obscurus, and describes the thoracic glandular pouch of Cheiromeles torquatus, which differs in structure and is less developed in the female f. Among the Frugivorous Bats several species present well-marked secondary sexual differences. i The species of the genus Epomophorus possess peculiar shoulder-tufts, consisting of long stiff hairs, differing in colour and length from the surrounding fur. These tufts correspond to the position of odoriferous glands, and are either less developed or wanting in the female. In Mr. Tomes's "Monograph of the genus Epomophorus" the form of the shoulder-tufts *f in each species is described, but the author does not notice their relative development in the sexes. In E. labiatus = Pteropus labiatus, Temm., the absence of the shoulder-tufts in the female is particularly noticed by Temminck §. In. E. gambianus, Ogilby, =E. crypturus, Peters, these epaulettes are well developed in the male, and are thus described by Mr. Tomes : - " The conspicuous shoulder-tufts of E. macrocephalus are here very fully developed. They consist of a very slight warty excrescence clothed with fur, which differs from that which surrounds it only in being of a dirty white colour" ||. As this description was taken from specimens obtained twenty-five years previously it is most probable that in the living animal these shoulder-tufts present much more conspicuous objects. Judging from the fine coloured illustration, representing the female of this species, in the ' Reise nach Mossambique,' and from the absence of any mention of these epaulettes in Dr. Peters's description^f, taken from an adult female specimen, we may conclude that in the female of this species also the shoulder-tufts are wanting. The only known specimen of E. franqueti, Tomes, is a male ; and the remarkable development of the shoulder-tufts is shown in the illustration accompanying Mr. Tomes's paper referred to above. They are thus described:-"The shoulder-tufts are very much developed, and differ somewhat from those of E. macrocephalus. They occupy a space on the shoulder of as much as 1| inch in length, in a descending direction; the lower half of this space consists of fur, which is of the same length and texture as that of the surrounding parts, but is of a buffy yellow colour ; whilst the upper part, constituting the real shoulder-tuft, is composed of long yellow hairs, which spring outwards and then curve downwards, partially * Temminck, ' Monographies de Mammalogie,' vol. ii. p. 355. t Loc. cit. p. 349. I Well shown in a fine coloured illustration of E. franqueti, Tomes, accompanying Mr. Tomes's Monograph of the genus (see Proc. Zool. Soc. 1860, p. 42, pl. lxxv.). § Monographies de Mammalogie, vol. ii. pp. 83, 84. || P. Z. S. 1860, p. 53. % Reise nach Mossambique, Saug. p. 26, pl. v. |
