IG 



NILS GYLDENSTOLPE, THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 



binson & Kloss at Kao Nawng in the Siamese Province of Bandon in the Northern 

 parts of the Malay Peninsula. 



In Northwestern Siarn it was apparently not uncommon and four specimens were 

 collected during my stay at Doi Par Sakeng. The length of the forearm seems to be 

 rather variable. In the male specimens in my collection it varies between 43,2 — 44, o 

 mm. and in the females between 43,3 — 44,5 mm. Robinson & Kloss gave the forearm 

 in their specimen to 41,5 mm. and in the »Fauna of British India» it is given to 1,g in- 

 ches which is about the same as in the Bandon-specimen. 



The cranial measurements on my specimens and that one from Bandon are almost 

 identical and therefore I think it is wisest not to give the specimens from Northern Siarn 

 a new subspecific name at least not until further material has been available. 



Skull measurements 1 



d 



e 



Total length 17,1 mm. 



Mastoid breadth ! 9,5 » 



Width of brain case 8,2 » 



Zygomatic width 13,0 » 



Length of upper toothrow 



Length of lovver toothrow 



Length of mandible from condylus 



to suture 



Condylobasal length 



Palatilar length 



0,0 



6,9 

 12,2 

 10,1 



7,1 



17.1 mm. 



10.2 » 



8.5 » 



13,2 » 



0,0 » 



7,0 > 



12,4 » 



10,4 > 



7.6 » 



10,5 mm. 



9,5 i 



8,2 » 



12.7 » 

 0,0 » 

 0.4 



11,9 » 



15.8 » 

 7,1 » 



(6,1 



mm 



) 



(0,8 



» 



) 



(13,2 



. 



) 



(15,9 



» 



) 



(7,9 



» 



) 



Tylonycteris rubidus. Blyth. 



5 Doi Vieng Par, Northwestern Siarn (c:a 4000 feet) G t h 1914. — Forearm = 25, o mm. 



As in Burma a small form of this bat also occurs in the mountain regions of North- 

 ern Siarn and one female specimen was shot at my camp on the slopes of the Doi Vieng 

 Par at an elevation of about 4000 feet. 



It was apparently not uncommon as numbers of specimens were observed at dusk 

 flying at a considerable height and were then rather difficult to get. 



It is with some hesitation that I have accepted Blyth' s name for the Siamese 

 form. His type came from Schwe Gyen in Upper Burma and is stated to be of a deep 

 rufous colour. 



My specimen is not rufous but dark brown above and the hairs are fulvous at their 

 bases. Tlie lower surface of the body is of about the same colour as in the specimens of 

 Tylonycteris robustula Thos. in my collection though perhaps somewhat darker. 



Skull measurements: 



Greatest length = 10,s; median length = 8,9; condyle to front of canine == 10, 1; 



1 Measurements in brackets are those recordeil by Robinson & Kloss on their specimen from Bandon 

 (Journal Fed. Malay States Mus. Vol. V. N:o 3. 1915 p. 11 G.). 



