^lW 1 '] PROCEEDINGS OF THE NATIONAL MUSEUM. 99 



the size of the eye, the number of gasterosteges, etc., iii L. roseofusca. 

 The manifest great variability of the characters derived from the num- 

 ber and shape of scales and plates in these snakes makes it quite likely 

 that some of the forms here recognized, in the future will be recognized 

 only as varieties. The number of gasterosteges, on the other hand, 

 seems to be rather constant, and the large size of the eye in L. trivir- 

 gata, as well as the prominence of the rostral in L. orcutti, are appar- 

 ently also features of considerable diagnostic importance. 





