17. 
18. 
SINO-MONGOLIAN FRONTIER 
mously larger bulle,” than in the other two 
species, of which M. unguiculatus is entirely 
diurnal and M. psammophilus partly so. 
M. auceps has also been recorded from 
North Shensi, as well as from the Ordos 
Desert itself. 
Chinese name “ Huang hsu,’ meaning 
** Yellow rat.” 
Meriones psammophilus, M.-Edw. 
Eight specimens, 6 gg, 2 92. 5 miles S. 
of T’ai-yiian Fu, Shansi. 2,600 ft. 
Two specimens, $3. 20 miles N.W. of T’ai- 
ylian Fu. Shansi. 3,950 ft. 
A very common species in these districts. 
It inhabits sandy places, from which fact it 
derives its name. It is smaller than either 
of the other two gerbils already mentioned, 
though in colour it more closely resembles 
M. auceps. 
Chinese name as in M. auceps. 
Meriones unguiculatus, M.-Edw. 
Two specimens, 3, 9. Tabool, 100 miles N. 
of Kalgan, Mongolia. 4,000 ft. 
This gerbil differs from the first named 
species in being of a more sandy colour, in the 
absence of the white underparts, and in the 
smaller bullae. It is found in the Ordos 
Desert and in Northern Shansi, as well as in 
193 fc) 
