DIPODILLUS QUADEIMACULATUS. 
261 
DIPODILLUS. 
Dipadillus, Lataste, Le Naturaliste, 1881, p. 506. 
Form somewhat similar to Gerhilhis, tail more crested and tufted with longer hairs. 
Soles of feet either moderately hairy or naked, with six pads. Brain-case and auditory 
bullae very full; teeth as in Gerbilliis, but pattern of molars usually rather less 
complicated, and the three divisions of the first molar snbequal. 
Dipodillus QUADEIMACULATUS, Lataste. (Plate XLII.) 
Gerbillus quadrimaculatus, Lataste, Le Naturaliste, 1882, p. 27. 
(5', 2 ? . Trapped under a shelving rock below a cliff in Wadi Hoaf, Heluan. In alcohol. 
The general colour of the upper surface is pale yellowish fawn, palest on the head 
and most yellow along the side of the body. Whitish around the eyes. Pure white 
on the under surface, inner side of limbs, and back of thighs. The distal part of the tail 
clothed with long greyish hairs. Ears somewhat livid towards the tips. Moustaches 
long. 
Four tubercles on the sole of the hind foot, one of them being placed between the 
third and fourth toes, the other three at the bases of the first, second, and fifth toes. 
Two tarsal tubercles, one slightly external to and slightly above the tubercle at the 
base of the fifth toe, the other further back in a line with the pollex. Ear, when 
laid forwards, reaching almost to the middle of the eye. Manus and pes naked. 
An abdominal gland. The female has 8 mammae. The female No. 98 was gravid 
with 4 fcetal young. 
Measurements. 
No. 97. 
No. 98. 
No. 99. 
6 . 
$. 
aclol. $ . 
mm. 
mm. 
mm. 
Snout to vent. 
95 
86 
Vent to tip of tail, without hair . . . 
. . . . 129 
121 
117 
Length of head.. 
31 
30 
Snout to eye.. . 
16 
15 
Eye to ear. 
7 
8 
Height of ear. 
14 
14 
Length of ear.. 
9 
10 
„ tarsus. 
24 
22 
[Measurements of skull;—Greatest length 27‘5 mm.; greatest breadth 15 ; length of 
