rp his paper gives a short record of the snakes collected by the Swedish Zoological 

 -■- Expedition to Siarn 1911 — 1912 & 1914 — 15. During my first journey in this 

 very interesting and quite unexplored country few species were met with and collected, 

 chiefly on account of the time of the year spent in Siarn. Of course, snakes are more 

 often seen and more lively during the wet season, and as my first journey only 

 lasted from December 1911 to the end of April 1912, t. i. during the cold and dry 

 seasons this may explain much. During the whole time I only collected specimens of 

 15 different species, although 1 visited several places which låter on have turned out 

 to be excellent hunting grounds for snakes and other kinds of reptiles. However, a 

 few of these species were then new to the Siamese Fauna viz. Dendrelaphis subocu- 

 laris Blgr. and Simotes tceniaius var. ?nouhoti Blgr. The material obtained, gave 

 also a few valuable hints about the knowledge of the geographical distribution of certain 

 species viz. Lycodon laoensis Gunth. and Amblycephalus moellendorffi Boettgr. The 

 former had then only been obtained in the Laos mountains of Upper Siarn and the 

 latter was a more southern form. 



At the middle of February 1914 I started on my second Expedition to Siarn 

 and a great deal of my time was spent in Northern Siarn — especially the parts of 

 the väst country which ne ver before have been explored by a trained naturalist. 

 During this time I made a two months trip from Chieng Mai, the Laos capital, along 

 the western börder up to Muang Fång and then right across the mountains to Chieng 

 Hai, from there along the Meh Koke river up the magnificent Mekong river and then 

 överland back to Chieng Mai passing Chieng Hai. After finishing this very interesting 

 trip I spent a few months more in Northern Siarn. Then I went down to the Siam- 

 ese Malaya and had a three months collecting trip here before I returned to Europé 

 in the middle of March 1915. 



In the following I will give some notes about the places where I collected, their 

 vegetation and their geographical situation in order to faciliate the reading of this 

 paper. 



The first collecting during my both expeditions was undertaken in and near 

 Bangkok. 



The capital of Siarn is situated about 33 km. from the mouth of the Menam 

 river and lies at 13° 45' N. Lat., 100° 28' E. Long. The whole city is surrounded by 



