and Revision of the South American Elaps. 1 71 



aa. The sixth upper labial in contact with the occipital : E. Riisei, 

 Jan. 

 u». Twenty-six to twenty-eight black rings round the trunk, and 

 seven or eight round the tail; rentrals 212, caudals 32. — Two 

 specimens. 

 i3/3. Twenty-five black rings round the trunk, and eleven round the 

 tail J ventrals 184, caudals 45. — One specimen from St.Vincent's. 

 yy. Twenty-two black rings round the trunk, and eight round the 

 tail; ventrals 176, caudals 45. — One specimen from Trinidad. 

 bb. A separate temporal shield between the sixth upper labial and the 

 occipital. 

 fltofc. Thirty-one black rings round the trunk, and seven round the 

 tail; ventrals 210, caudals 31. — One specimen from the West 

 Indies. 

 /3)8. Seventeen black rings round the trunk, and six round the tail ; 

 ventrals 207, caudals 42. — One specimen. 

 p. The width of the black rings is more than one-half of that of the 

 interspaces between. 

 aa. Twenty-eight black rings round the trunk, and ten round the tail ; 



ventrals 202, caudals 47. — One specimen from Brazil. 

 bb. Twenty-eight black rings round the trunk, and six round the tail; 



ventrals 210, caudals 32. — One specimen. 

 cc. Twenty-five black rings round the trunk, and six round the tail ; 



ventrals 214, caudals 34. — One specimen. 

 dd. Twenty-four black rings round the trunk, and eight round the 

 tail; ventrals 210, caudals 31. — One specimen. 

 y. The black rings and the interspaces between nearly equal in width ; 

 each black ring edged with a single series of isolated yellow scales 

 anteriorly and posteriorly. 

 aa. Thirty-two black rings round the trunk, and nine round the tail ; 

 ventrals 109 (209?), caudals 47 : Elaps ornatissimus, Jan, from 

 Central America. 

 bb. Forty-two black rings round the trunk, and ten round the tail ; 

 ventrals 206, caudals 43. — One specimen from Para. 

 b. The yellow rings indistinct or not visible. 

 et. The interspaces of the red ground-colour extend over ten to thir- 

 teen scales : Elaps corallinus, D. & B. 

 aa. Over thirteen scales ; seventeen black rings round the trunk, and 



six round the tail. — One specimen from Trinidad. 

 bb. Over twelve scales. 

 »ot. Fifteen black rings round the trunk, and six round the tail; 

 ventrals 194, caudals 43. — One specimen from the interior of 

 Brazil. 

 /3/3. Nineteen black rings round the trunk, and four round the tail ; 



ventrals 221, caudals 30. — One specimen. 

 cc. Over eleven scales; eighteen black rings round the trunk, and 



five round the tail. — One specimen. 

 dd. Over ten scales ; twenty to nineteen black rings round the trunk, 

 and seven to eight round the tail. — Two specimens from Brazil. 

 ^. The interspaces of the red ground-colour extend over less than ten 

 scales. 

 ee. Over nine scales. 

 u». Eighteen black rings round the trunk, and four round the tail ; 



ventrals 215, caudals 28. — One specimen. 

 /3/3. Eighteen black rings round the trunk, and seven roimd the tail. 

 — One specimen. 



