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."* 



29. Dipus Sowerbyi, Thomas. (Plate 50). 



3 57, III, 112, ? 104, 108, lOg, no, 113. Yii-lin Fu, Shensi. Alt. 

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



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

 November 12th, 1908. 



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. AUactaga mongolica longior, Miller. (Plate 52). 



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



3 205, 206, 207, 208, 213, 219, 220, 223, 224, 239, 241, 2 204, 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 AUactaga mongolica {Pallas), but ear and hind 

 foot longer and audital buUoe 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, I9"8 ; depth of 

 brain case at middle, I3'6 ; nasal (median), I5'4; diastema, I2'6; 

 mandible, 24"8 ; maxillary tooth-row, alveoli, 8'0 ; 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*sbu" as the " Mole-rat." 

 183 



