Cope.] 4JJ [May 21, 



Dryophidin^e. 



I. Middle maxillaries not elongate, posteriors grooved. 

 a. An elongate nasal appendage. 



Nasal and anal scuta undivided ; scales keeled Langaha Brug. 



aa. No nasal appendage. 



Scales keeled Dryophis* Boie. 



Scales smooth Dryinus Wagl. 



II. Middle maxillaries elongate ; posteriors grooved. 

 a. An elongate nasal appendage. 



Pupil horizontal Passerita Gray. 



aa. No elongate nasal appendage. . 



A loreal plate ; prenasals joined on the middle line Gepliyrinus\ Cope. 



A loreal plate ; nasals not joined Tragops Wagl. 



No loreal plate ; nasals separate Tropidococcyx Gthr. 



PSAMMOPHIDIN^E. 



Anal entire ; a loreal Psammodynastes Gthr. 



Anal divided ; a loreal Psammophis Wagl. 



Nostril in prenasal ; no loreal Mimophis Gthr. 



Lycodontin^e. 



I. Anterior maxillaries not isolated. 

 a. Subcaudal scuta double. 

 ($, Dorsal scales of equal size. 

 Two nasals ; nostril in the anterior ; a loreal ; body much compressed 



Lycodryas Gthr. 

 Two nasals ; nostril between ; body not compressed ; lores plane 



BoMonX D. & B. 

 Two nasals ; body not compressed ; lores longitudinally grooved 



Bothrophthalmus% Schl. 



Two nasals ; nostril in the anterior Lycophidium\\ Fitz. 



One nasal ; a loreal Metoporhina Gthr. 



/?/?. Dorsal scales of unequal size. 



Vertebral series smooth ; body compressed Hormonotus Hallow. 



Vertebral series smooth j body round Lamprophis Fitz. 



Vertebral series bicarinate ; body round Simocephalus*\ Gray. 



aa. Subcaudal scutella entire. 

 Two nasals ; scales equal, smooth Uoluropholis Dum. 



*Thelotomis Smith. Claclophis Dum. 



fType Dryophis fronticincla Gthr. 



X Eugnathus D. & B. 



^Belongs perhaps to Colubrinse. 



|| Alopecium I>. «.t B. 



' Heterolepis Bin, DiaphorolepisJa.il. 



