20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 77 



lamellae with a distinct keel, 21 under the fourth toe; tail about one 

 and one-fourth times as long as the head and body. 



Dimensions. — Snout to vent, 38 mm.; snout to posterior ear, 9 mm.; 

 snout to shoulder, 14 mm.; snout to center of eye, 4.5 mm.; axilla to 

 groin, 20 mm.; hind leg, 15 mm.; fore leg, 11 mm.; tail, 48 mm. 



Coloration {in alcohol). — Upper parts of head and body black, with 

 a pale blue dorsal stripe beginning on the top of the snout and con- 

 tinuing to the end of the tail; a pale lateral stripe beginning on the 

 upper eyelid, passing considerably above ear and shoulder and fading 

 out above insertion of hind limb; below this lateral stripe the black 

 rapidly fades out to an opalescent immaculate cream color which 

 covers the entire under surface ; upper surfaces of limbs and tail pale 

 brown, the fingers and toes ringed with brown. 



Paratype. — U.S.N.M., No. 76850, collected at Doi Angka, Siam, 

 on December 2, 1928, by Dr. Hugh M. Smith. This specimen is 

 slightly larger than the type. Its dimensions are as follows: Snout 

 to vent, 39 mm.; snout to posterior ear, 11 mm.; snout to shoulder, 

 16 mm.; axilla to groin, 19 mm.; hind leg, 17 mm.; fore leg, 14 mm.; 

 tail, defective. 



The only noticeable difference in the structure of the two is to be 

 found in the ear opening which is elongate in the paratype, while 

 nearly round in the t^ype. The paratype has stronger markings than 

 the type. The lateral stripe from axilla to groin, barely discernible 

 in No. 75591, is quite well defined in No. 76850, as are the black 

 bands encircling the fingers and toes at the joints. Dr. Hugh M. 

 Smith notes that the tail of the Doi Angka lizard was bright orange. 

 The scales on upper surfaces of the limbs are heavily dotted with 

 dark brown at the base; in the type this pigmentation is less pro- 

 nounced. There are 21 subdigital lamellae under the fourth toe of 

 No. 76850 and 32 scales around the body. There is but one pair of 

 enlarged nuchals; these are much larger, however, than the nuchals 

 on the type specimen. 



Relationship. — While the new species is very distinct from any of 

 the described Malayan species of Leiolopisma, yet it seems consider- 

 ably closer to L. vittigerum than to any of the others, because both 

 species have conspicuously enlarged dorsal scales. They differ in 

 coloration, in the number of enlarged dorsals, in the keeling and num- 

 ber of the subdigital lamellae and in the number of scale rows around 

 the body. 



LEIOLOPISMA KOHTAOENSIS Cochran 



Leiolopisma kohtaoensis Cochran, Proc. Biol. See. Washington, vol. 40, 

 Dec. 2, 1927, p. 188. 



U.S.N.M. 



72282-3 Koh Tao, Gulf of Siam Dec 31, 1926. 



72284 type do Do. 



76146-7 do Sept. 18, 1928. 



