1904.] N. Annandale — Collection of Oriental Snakes. 209 



frontier. The larger is light in colour, with few markings ; the smaller 

 is well-marked. Neither belongs to the form atriceps. 



13. Zamenis rhodorachis* Jan 



Z. rhodorachis, Ale. and Finn, op. cit. p. 663. 



In addition the specimens mentioned by these authors the Museum 

 has lately received from Col. McMahon two specimens frotn the Perso- 



Baluch frontier. 



14. Zamenis karelinii (Brandt) 



Z. karelinii, Ale. and Finn, loc. cit. 



Six specimens from Col. McMahon, from the same district as the 

 last. 



15. Stoliczkaia khasibnsis* Jerd. (Plate IX, fig. 2. 

 S. khasiensis, Blyr. Faun. hid. Rept., p. 354, fig. 103 ; Cat. Snakes, i p. 75. 



In the collection of Assamese snakes to which reference has been 

 made, I have been so fortunate as to find an example of this extremely rare 

 species. It appears to be the second specimen known. The type, 

 from the Khasi Hills, is in the British Museum. In the Indian Museum 

 specimen the frontal shield is completely divided by a longitudinal suture. 

 There are four small chin shields on each side, each in contact with the 

 opposite shield mesially, the hindermost pair in contact with the first 

 ventral behind. Ventrals — 210 ; sub-caudals — 116 : anal entire : 28 rows 

 body scales, the three lowest on each side pale with dark bases. Total 

 length — 809 mm : length of tail — 235 ram. 



The only other known species of this genus occurs in Borneo^ — 



16. DiPSADOMORPHUS TuiGONATUS ( Schneid.) (Plate IX, figs., 3, 4.) 

 Dipsas trigonata, Blgr. Faun. Ind. Rept., p. 358. W. L. Sclater, List 

 Snakes, p. 45. Dipsadomorphus trigonatus, Blgr. Cat. Snakes, iii, p. 63. 



Three specimens sent by Col. McMahon from the Perso-Baluch 

 frontier. 



They agree in having the dorsal surface of head of an almost uni- 

 form sooty-black, which is most intense in the youngest specimen. The 

 markings on the back also appear to be brighter than those of most 

 examples from Peninsular India. A specimen from Assam agrees 

 with them in this respect, but differs in having the head marked 

 in the typical manner. 



Should it be considered right to give the black-headed form a 

 name, it may be known as var. melanocephalus. 



The Perso-Baluch specimens exhibit — apart from their black heads 

 — the close superficial resemblance to EcJiis carinatus noted by Boulenger 



1 StolicxJtaia horneensis, Blgr. Ann. Mag. N. H. (7) iv, 1899, p. 452. 



