8C 
THE MAMMALS OF EGYPT. 
Ears, skin of muzzle, and upper surfaces of wing-bones yellowish flesh-coloured or 
pale yellowish brown. Wing-membrane almost invariably more or less irregularly 
spotted with white, but not so markedly as in the Malayan genus Harpyia. 
The solitary young individual produced by this species is born blind, generally in 
the month of February or March. At birth, the whole under surface of the body, 
from the chin to the end of the tail and the under surfaces of the membranes and 
limbs, are practically devoid of hair. On the upper surface the hair has the same 
distribution as in adult life, but it is extremely short and adpressed. The muzzle is 
perfectly nude with the exception of the moustachial and other bristles. 
The great size of the pectoral teats of this bat enables, the young to have a very firm 
grasp of their mothers. It is the left horn of the uterus which is generally fertilized. 
Measurements of skulls of R. aegyptiacus (E. Geoffr. St.-HiL), R. collaris (Illiger), 
and R. arabicus, sp. nov. 
i?. mgyptiacus. 
i?. collaris. 
B. arabicus. 
Cairo. 
Cape Town. 
Aden. 
mm. 
mm. 
mm. 
Upper border of foramen magnum to tip of premaxillaries . . . 
Lower border of foramen magnum to tip of premaxillaries (basal 
45 
42 
40-5 
length).. 
41 
37-5 
36-5 
Lower border of foramen magnum to posterior border of palate . 
16 
15 
14 
Breadth of palate posteriorly. 
9 
8‘5 
6-5 
„ between last molars. 
10-5 
9-3 
8-5 
„ „ 2nd premolars. 
7-5 
6-5 
5-5 
Greatest zygomatic breadth. 
28-5 
26 
24-7 
Anterior border of orbit to tip of premaxillaries. 
17-5 
15-1 
15 
Minimum frontal diameter. 
8-4 
9 
8 
Breadth outside external meatus. 
19 
18 
16-5 
Eront of canine to back of last molar. 
18 
16-5 
16 
Basi-bregmatic height. 
15 
14-5 
13 
Extreme length of lower jaw. 
36 
33 
31 
Vertical depth of lower jaw. 
18 
14-5 
14-5 
Front of lower canine to back of last molar. 
19 
17-1 
17 
This bat is found in ancient Egyptian tombs and temples, old mosques, and Sheiks’ 
graves, or in crevices of rocks. In the days of E. Geoffroy St.-Hilaire it frequented the 
recesses of the Great Pyramid, but now it is not found in that building, at least I 
failed to find it there, although I sought for it on three occasions, whilst the Arabs 
I deputed to look for it were equally unsuccessful in obtaining it. It is met with 
on trees in gardens, and in date-plantations around villages, in sycamore, mulberry, 
and other trees. It is occasionally found singly, but generally a few are associated 
together. In clear moonlight nights it may be seen flying about in search of the fruit 
