18 L. G. ANDERSSON, SOME NEW SPECIES OF SNAKES. 



lateral, between two nasals. Loreal nearly twice as long as 

 deep, not reaching tlie eye. Frontal hexagonal, longer than 

 its distance to tlie tip of the snout and slightly shorter than 

 the parietals. One prseocnlar, not reaching the frontal. Two 

 postoculars; temporals 2 + 3. Eight npper labials, the fourth 

 and fifth entering the eye; the sixth and seventh being the 

 largest. Eight lower labials, four of which are in contact 

 with the anterior chinshields, which are longer than the 

 posterior. 



Body elongate and compressed, especially the anterior 

 part. Scales in 19 rows, all smooth and equal in size, without 

 apical pits. Ventral shields 225, anal entire. Tail long, 

 nearly one fourth of the total length, gradually tapering to 

 the narrow end; subcaudals 101, in two rows. 



Colour above brownish and greyish white by numerous 

 more or less regular, broad, brown, dark edged, crossbands, 

 alternating with narrower light ones. The brown crossbands 

 are broadest on the back, where the sometimes merge into 

 each other. On the sides they are contracted, wherefore the 

 white-greyish colour there is more expanded. Lower parts 

 yellowish white, marbled with dark. The head above light 

 brown with dark distinct spöts on the shields. Behind the 

 eye a broad dark edged brown band, extending to the eighth 

 upper labial. The head below, the upper labials and the 

 throat yellowish white with dark döts on the labials. 



The single specimen of this new form also belongs to the 

 collections from Dr. Touzet at Rio Janeiro, which collections 

 are said to be from Brasilia. Probably the north part of 

 that country is the patria of this snake, all other species of 

 the genus Tropidoäipsas being from Mexico and Central 

 America. 



The specimen is a female. 



Total length 920 mm. 



Length of the tail 220 » 



> » head (distance between the nose and the hind 



margin of the parietals) 15,8 » 



Greatest breadth of the head 14 > 



Horizontal diameter of the eye 3,6 » 



Distance from the eye to the tip of the snout 6 > 



