1875.] MR. G. E. DOBSON ON THE GENUS SCOTOPHILUS. 371 
B. Internal basal lobe of ear convex, evenly rounded: . 
front surface of tragus smooth ............6s0006 (Scoteinus.) 
a’. Kars nearly as long as the head; internal - 
basal lobe commencing in a long lobule pro- 
jectine backwards! .<.-0...<.c¢sessescteessescets pee S. emarginatus, Dobson. 
6’. Ears much shorter than the head, internal 
basal lobe commencing in a short lobule. 
y. Cingulum of the upper incisors with a 
small cusp posteriorly .....:........eeeeeee S. rueppellii, Peters. 
6. Cingulum of the upper incisors without a 
PIGRHCLIOMICORS Site aches ste tt ec dates eeectee S. greyti, Gray. 
b. Upper incisors separated from the canines by a 
short space; premaxillary bones more deve- 
loped ; nasal opening small..................06 (Scotomanes.) 
e. Cingulum of the upper incisors with a di- 
stinct cusp posteriorly ..............0sc0se0e0e S. ornatus, Blyth. 
This is not intended to represent a complete synopsis of the 
species of Scotophilus, but to indicate how the genus may be 
divided into groups, and to serve as a guide to determining the 
species. Sc. ornatus does not come properly under either of the 
first two groups ; I have therefore placed this species by itself. 
This very remarkable species, which inhabits the warm valleys 
among the hills below Darjeeling, the Kasia Hills, and Kakhyan 
ranges, Yunan, is distinguished from all the other species of Sco- 
tophilus by the peculiar pied condition of the fur*, in which and in 
other respects, as in the form of the ear and tragus and shape of 
the head and muzzle, it approaches the American genus Atalapha. 
If the skull be compared with that of a full-grown specimen of 
Se. temminckii, the following differences may be observed :— 
In Sc. temminckii the superior angle of the occipital crest forms 
with the sagittal crest a prominent projection; in Sc. ornatus this 
projection is small, the sagittal crest is more developed in front, and 
the postorbital processes are larger. The frontal in Sc. ornatus is 
grooved in the centre; in Sc. temminckii it forms a plane surface. 
In Se. ornatus the premaxillary bones are much more developed and 
the nasal opening is not half the size of that in Sc. temminchii ; the 
incisors also are placed at the inner side of the premaxillaries and 
separated from the canines by a space. In Sc. ornatus the bony 
palate is much broader behind the last molars, and does not extend 
so far backwards. 
In the upper jaw, the teeth (with the exception of the incisors, 
which are separated from the canines and have an acute short 
posterior cusp) are very similar in both species: in the lower jaw 
* The following is a description of the colour of the fur in Se, orzatus;— 
In males, above light chestnut, on the crown of the head a small longitudinal 
patch of pure white; from the back of the head, for two thirds the length of 
the spine, a narrow interrupted band of white extends longitudinally; at the 
base of the ears posteriorly a patch of white; on either side of the body two 
white patches, one in front of the head of the humerus, the other behind it: 
on the under surface a band of white round the neck connects the spots behind 
each ear, this is succeeded by a band of chestnut-brown, followed by a band of 
white and succeeded by pale brown, which extends to the root of the tail, In 
females the fur is much darker throughout, and the white spots and bands of 
less size and occasionally altogether absent in certain places. 
24* 
