^4i Dr. A. Giinther on new Species of Snakes 



The form of the head and of the shields is the same as in S. 

 variabilis and S. Salvini, the sixth upper labial being very small, 

 and the seventh very large. Ventral plates 226 ; anal entire ; 

 (tail mutilated). 



Black; snout with two lighter cross bands; upper labials 

 brownish yellow, with broad black margins ; anterior ventrals 

 yellow, with a black margin, which gradually becomes broader 

 in the ventrals of the second fifth of the length of the body ; 

 from the middle of the length, the belly and the subcaudals are 

 entirely black. 



Total length 7 feet 9 inches. 



Dromicus Godmanni. 



Scales smooth, without apical groove, in twenty-one series ; 

 ventrals 176; anal divided; subcaudals 88. Loreal longer than 

 high ; one prse-, [two post-oculars. Upper labials eight, the 

 fourth and fifth entering the orbit. Temporals 1+2 + 3. Pos- 

 terior chin- shields shorter than the anterior, which are in con- 

 tact with four lower labials. Brownish grey, with a blackish 

 vertebral band as broad as a scale ; another similar band runs 

 along the fifth outer series of scales. Dark lines, besides, follow 

 each of the other series of scales. Each upper labial with a 

 bright-yellow, dark-edged spot ; a pair of yellow spots on each 

 side of the neck, at the commencement of the lateral band. 

 Lower parts uniform whitish. 



Several specimens were collected by Messrs. Godman and 

 Salvin at Duenas (Guatemala) : the largest is 18 inches long; 

 tail 5 inches. 



AhcetuUa frenata. PL II. fig. B. 



Of very slender habit. Scales smooth, lanceolate, in seven- 

 teen rows. Snout produced, rather pointed, the width of the 

 interorbital space being only two-thirds of the length of the 

 snout. Anterior frontals not quite twice as long as broad ; 

 posterior frontals twice as long as broad. Loreal none; prse- 

 orbital reaching to the upper surface of the head, but not in 

 contact with the vertical ; two postorbitals. Rostral shield quite 

 at the lower surface of the projecting part of the snout. -Eight 

 upper labials, the third, fourth, and fifth entering the orbit. 

 Temporals 1 + 2 + 2. Eye of moderate size, with round pupil. 

 Ventral shields long, not keeled on the sides, 191 in number ; 

 anal bifid; subcaudals 166. The posterior maxillary tooth is 

 somewhat larger than, and separated from, the preceding tooth, 

 and not grooved. Upper parts of the head and nape green; 

 a black, inferiorly white, streak runs from the rostral shield 

 through the eye, along the side of the head and neck, as far 

 backwards as the seventh ventral shield. The trunk and the 



