81. RDADIN^A. 161 



iu 15 to 21 rows ; ventrals not or but obtusely angulate laterally. 

 Tail moderate or long ; subcaudals in two rows. 

 Central and South America. 



Fig. 15. 



Maxillary aud mandible of Ehadinma mcrremii. 



Synopsis of the S^ienies. 

 I. Scales iu 15 to 19 rows. 



A. Anterior chin-shields at least as long as the posterior ; tail not 

 more than one fourth of the total length. 



1. Six or seven upper labials, third and fourth entering the 



eye. 



a. Scales in 17 rows. 



One postocular 1. leucogaster, p. 163. 



Two postoculars ; nostril between two 



nasals 2. hreviceps, p. 164. 



Two postoculars ; nasal single 3. callic/aster, p. 1G4. 



b. Scales in 15 rows 4. mimus, p. 164. 



2. Eight upper labials, fourth and fifth entering the eye. 

 a. Scales in 19 rows. 



a. Ventrals obtusely angulate laterally. 



Ventrals 147-159 ; subcaudals 50-73. 5. anomala, p. 165. 

 Ventrals 186-198 ; subcaudals 75-92. 6. sagittifera, p. 165. 



/3. Ventrals not angulate laterally. 



Suture between the frontal and the 



pncfrontals not longer than that 



between the frontal aud the 



supraocular 13. obtitsa, p. 171. 



Frontal wide, supraocular suture 



shorter than anterior 14. scrperastra, p. 172. 



VOL. II. j£ 



