BASCANION. 97 



loral by one corner. Lower postorbital in contact only with the 4th 

 labial, the 5th scarcely touching it by its corner. The scales are 

 scarcely as much elongated as in B. constrictor. 



Above light olive-green, posteriorly tinged somewhat with reddish. 

 Beneath bright greenish yellow, rather lighter on the tail, this color 

 involving the lower half of the labials. The skin between the scales, 

 but slightly extensible, is black. On the sides the scales are ob- 

 scurely margined with greenish yellow, and many of them have each 

 a single spot of black, generally near the tip. The abdominal scu- 

 telljB are also sparsely spotted in a similar manner. The spots are 

 sometimes wanting. 



A specimen from California differs in having the vertical broader. 



Betw.IndianoIa&) -,nn < -t nn -i^ ocia nir-nn i 



167+1. 90. 17. So. 10. Col. J. D. Graham. 



San Antonio. 



« 



" 169+1. 95. 17. 29. 7h 



California. ■ 188+1. 91. 17. 34. 8J. Dr. W. Gambel. 



5. Hascanion l-ellistsss, B. & G.— Stouter than B. fiaviventris. 

 Breadth of head across superciliaries equal to half the interval between tip 

 of rostral and jjosterior end of occipitals. Lower postorbital in notch be- 

 tween the 4th and 5th labials. Olive-brown above, greenish white beneath. 



Head broader and s*norter than in B. flaviventris. Vertical rather 

 shorter, broader behind. Superciliaries and frontals much broader. 

 Centre of eye scarcely in advance of the centre of commissure. Pro- 

 file more rounded in front. Above olive, tinged with brown ; be- 

 neath greenish white, no black dots visible. There appears to be 

 little if any black in the skin between the scales, although the basal 

 edges of the scales themselves are slightly tinged. 



