ART. 1 MAMMALS FROM CHINA HOWELL 67 



As no specimens of undoubted mongolica tyjncus are available I 

 follow the opinion of G. M. Allen (1925) in considering that Chihli 

 examples are separable. 



ALLACTAGA MONGOLICA LONGIOR Miller 



Allacataga mongolica longior Miller, Proc. Biol. Soc. Wash., vol. 24, 1911, 

 p. 54 (15 miles northeast of Chingningchow, Kansu, China). 



Specimens. — Thirteen from Kansu : From the iy^o, local ity, 12, 

 including the type ; and 45 miles northwest of Ninghsia, 1. 



Not only are the ear and foot of this race distinctly longer than in 

 Chihli specimens but the toes are heavier and longer. In regard to 

 specimens which he kept in captivity, Sowerby found that they slept 

 upon the side or back and if disturbed would kick and bite savagely. 

 When not on the alert they had a queer habit of drooping the ter- 

 minal half of the ears. Efforts to trap them proved unsuccessful, 

 probably because no bait could be found to tempt them. The natives 

 secured them by digging them out of their holes, " but," says 

 Sowerby, " it takes a native to find the hole." They are called by 

 the suggestive native name tiao-tu-tze, which means "jumping rump." 



Genus EUCHOREUTES Sclater 



EUCHOREUTES NASD ALASHANICUS A. B. Howell 



Euchoreutes naso alashnnicus A. B. IIowell, Proc. Biol. Soc. Wa.sh., vol. 

 41, 1928, p. 42 (Alashan Desert, Inner Mongolia, 100 miles north-northwest of 

 Ninghsia, Kansu, China). 



Specivien. — One, the type. 



This is an ochraceous and pale race, with larger bullae. 



Genus DIPUS Zimmermann 



DIPUS SOWERBYI Thomas 



Dipus sowertyi Thomas, Ann. Mag. Nat. Hist., ser. 8, vol. 2, 1908, p. 307 

 (Yulinfu, Shensi, China). 



Spedinetis. — Nine from Shensi: Yulinfu, 7; and 13 and 15 miles 

 north of Yulinfu, 2. 



Sowerby found these jerboas capable of making enormous leaps 

 and one jumped out of a water jar three feet deep. Some which he 

 kept in captivity slept during the day, usually lying on their sides, 

 and so soundly did they sleep that one could pick them up and handle 

 them without arousing them. Several times when in this condition 

 they were thought to be dead. They are very frugal eaters, merely 

 nibbling at vegetables or grain. They hibernate during the cold 

 weather. 



