ART. 11 HERPETOLOGICAL COLLECTIONS FROM SIAM — COCHRAN 33 



This beautiful speoies is subject to some variability in the region 

 of the upper lip just behind the rostral appendage. Although the 

 number of labials is constantly eight in all my specimens excepting 

 one, which has but seven on one side of the head, there is frequently 

 a horizontal division of one of the labials, which makes an additional 

 scale just below the loreal region. In three cases the third labial 

 is thus divided on one side of the head, and once the second labial is 

 so divided. In one case the third labial is wedged in between the 

 second and fourth, so that it fails to reach the lip border. There 

 are three scales bordering the anterior portion of the eye in the 

 majority of cases, the additional "suboculars" resulting from the 

 horizontal separation of the top portion of the fourth labial. Two 

 postoculars are constantly present. One anterior temporal is more 

 commonly encountered than two; there are constantly two posterior 

 temporals in this collection. 



CHRYSOPELEA ORNATA (Shaw) 

 U.S.N.M. 

 67304 Sikut River Nov. 15, 1923. 



67492 (S718)... Nontaburi __. Sept. 2, 1923 



67493 (S721) do ...do 



67494 (S725) do Oct. 23, 1923-_- 



67495 (S594) -_ _ Bandon 1922 



67496 (S596) do 1922 



67497 (S597) do 1922 



67498 (S723) ._ _ Bangkok September, 1924.. 



67499 (S724) do Oct. 26, 1923_.. 



70297 (S2031) do July 27, 1924_.. 



70298 (S1809) do Mar. 6, 1925 



70299 (S2060) do Aug. 6, 1925 



70300 (S2085) do Aug. 21, 1925. __ 



70301 (S2232) do Oct. 23, 1925... 



72058(82390).. Bangkok (H. M. Smith's Jan. 25, 1926... 



yard) . 

 72059 (S2391).. Bangkok do 



72149 (82392). _ Koh Chang Jan. 4, 1926 



72150 (82394) do Jan. 5, 1926 



72162 (82326). _ Pak Jong Nov. 15, 1925... 



72177 (S2818).. Bang 8uk Aug. 24, 1926... 



72716(82924).. Koh Tao Jan. 2, 1927 



75681 (83791) .. Bangkok June 16, 1928.- _ 232 122 



Our specimens of the beautiful green and black tree snake from the 

 mainland of Siam conform with variety D in Boulenger's Catalogue 

 of Snakes, ^^ as Dr. Malcolm Smith has likewise found. We have two 

 snakes from Koh Chang (72149 and 72150) and one from Koh Tao 

 (72716) which show the melanism which is often found in island forms. 

 In these specimens the mesial black line on each scale has become 

 greatly widened, so that the entire upper part of the body seems to 



12 Vol. 3, 1896, p. 197. 



itrals 



Caudals 



220 



120 



237 







228 



120 



232 



126 



231 







221 



120 



228 



140 



231 



132 



228 







230 



119 



229 



140 



236 







235 



141 



227 



119 



227 



135 



223 



135 



236 



135 



227 



139 



223 







226 



117 



234 



132 



