Chinese names " Ha-lao," " Ha Hui " or " Hsia-lao." " Ha " and 

 " Hsia " mean "blind," " lao " means ** old," and "Hui" means "grey." 

 The above names may be translated " the blind old one " or " the blind 

 grey one."* 



2g. Dipus Sowerbyi, Thomas. (Plate 50). 



<? 57, m, 112, ? 104, 108, 109, no, 113. Yu-lin Fu, Shensi. Alt. 

 3000 ft. November 2nd to 19th, 1908. 



? 86. Ordos Desert, 15 miles north-west of Yu-lin Fu. Alt. 3000 ft. 

 November 12th, igo8. 



A good topotypical series of a race of three-toed jerboas inhabiting 

 the Ordos Desert and immediate vicinity, the only three-toed jerboa 

 hitherto recorded from China. 



Their food seems to consist of delicate shoots and seeds of such 

 scrubby plants as can find sustenance in the arid desert. 



Chinese name " T'iao-6rh " (The Jumper). 



30. Allactaga mongolica longior. Miller. (Plate 52). 



Proc. Biol. Soc, Washington, xxiv., page 54, February, 191 1. 



(? 205, 206, 207, 208, 213, 219, 220, 223, 224, 239, 241, ? 204, 221 (in 



alcohol), 222, 240. 



15 miles north-east of Ching-ning Chou, Kansu. Alt. 6200 ft. July 



26th and 27th, 1909. 



Type. — Adult female, skin and skull, No. 155, 183, U.S. National Museum. 

 Collected 15 miles north-east of Ching-ning Chou, Kansu. Alt. 6200 ft. 

 July 26th, 1909. 

 Original number, 204. 



Diagnosis. — Similar to true Allactaga mongolica (Pallas), but ear and hind 

 foot longer and audital bulloe larger. 



Measurements in mm. — Type : head and body, 150 ; tail, 230 ; hind foot without 

 claws, 76 ; skull : condylobasal length, 38*4 ; zygomatic breadth, 26*0 ; 

 interorbital constriction, ii'4; breadth of brain case, 19*8; depth of 

 brain case at middle, i3'6 ; nasal (median), I5'4; diastema, i2'6; 

 mandible, 24*8 ; maxillary tooth-row, alveoli, 8"o ; mandibular tooth-row, 

 alveoli, 7*8. 



specimens examined. — Twelve all from the type locality. Dug up by natives. 

 Apparently very numerous in this district, though not met with else- 



• Giles gives " Hsia-Iao-shu " as the "Mole-rat." 



183 



