On a nezo Gecko and a new Snake from Sumatra. 281 



1915, and were given to Mr. La Touclie, wlio kept them alive 

 in captivity till December 1916. Unt'oituiuitely coufiiienient 

 somewhat damaged the specimens, tlieir hair becoming unduly 

 worn, especially on tiie tails and hind feet. Nevertheless, I 

 think there can be no doubt about their representing u 

 distinct species. The area in which they were collected is 

 divided from the Ordos Desert, the home of Dipus sowerhyij 

 by a wide stretch of country occupied more or less by moun- 

 tains and hills, often of a well-wooded nature, where no form 

 of jerboa exists. The dii^cov^ry of this form in North-eastern 

 Chihli marks a further eastward extension of the known 

 range of Dipus by another 500 miles, and it is possible tliat 

 it extends even further to the extreme eastern edge of the 

 Mongolian desert, where that country comes into contact 

 with Manchuria. 



XXXVIII. — Descriptions of a new Gecko and a new Snake 

 from Siunatra. By G. A. BOULENGER, F.R.S. 



(Published by permission of the Trustees of the British Museum.) 



A SMALL collection made by Mr. C. J. Brooks, the discoverer 

 of the remarkable Bornean Dyscophid frog Colpoglossus 

 brooksiif described in these 'Annals' in 1904, in Sumatra 

 between 1912 and 1917, and presented by him to the British 

 Museum, contains examples of the following species, some of 

 which (marked with an asterisk) have not been recorded 

 from Sumatra before : — 



BatraCHIANS: Ichthyophis glutinosus, L., Btifo jerboa, 

 Blgr.*, JihacophuvuH leucomi/sla.v, Gravenh. 



Reptiles Gecko stentor, C;inr., Gecko brooksii, sp. n."*^, 

 Plycliozoun homalocephii/uin, Crev., P. hor.sfiddii, Gray *, 

 Draco cbscui-us, Blgr.*, Mabuia rugifera, Stol., Lygosovia 

 vittigeruni, Blgr."^, Typhlops nigroalbus, D. & B., XewpeUis 

 unicolor, Reinu., Tiopidonotus trianguUgerus, Boie, 2\ con- 

 spicillatus, Gthr., Lyeodon albofusciis, D. & B., Coluber mela- 

 nurus, Sclileg., Dendrophis pic(us,G\i\., Simotes purpurascsns, 

 Schleg., aS. octoUneatus, Schn., Calainaria alidce, up. n*, 

 JS^aia iripudians, var. leucodii'a, Blgr. 



The locality is Lebong Tandai in Benkoelen. 



Gecko brooksii, sp. n. 

 Body elongate; head once and three-fourths us long as 



