437 



SERENUS. 



Serpens Cenchrus, vel Serenus Brasiliensis. Seb. 2. t. 42,/*. 2. 



ABOUT the size of the preceding : colour above 

 blue, with a moderately broad dorsal sea-green 

 stripe, marked with a few small, distant, black 

 spots : the sides marked with deep blue or blackish 

 spots : head of moderate size, large-scaled, and 

 marked at the top by a large and somewhat trian- 

 gular white spot pointing backwards : abdomen 

 white, the scuta pretty deeply edged or variegated 

 with dark brown : tail gradually tapering to a 

 fine point : native of Brasil. 



LOZENGE-SPOTTED SNAKE. 



Coluber Rhombeatus. C. glaucus, macuHs rhombeatis nigrican- 



tibus media ccerulds. 

 Glaucous Snake, with blackish lozenge-shaped spots blue in 



the middle. 

 Coluber Rhombeatus. Lin. Sysf. Nat. p. 380. Mvs. Ad. Frid. 



p. 27. t. 24./ 2. 



Vipera Cencoatl dicta. Seb. 2. t. 26. /. 1, 2, 3 i 

 Serpens Amboinensis tigrina. Seb. 2. t. I5.f. 2. 

 Abdominal scuta 157? subcaudal scales 70. 



GENERAL length from two to three feet or 

 more : colour grey or brownish, with three alter- 

 nating, longitudinal rows of ovate, but somewhat 

 rhomboid, dusky spots with large blueish centres : 

 head rather large than small: abdomen pale or 

 whitish, often clouded with blueish grey: the 



