100 REPTILES. 



d. Half-grown. N. America. From Mr. Cuming's Collection. 



e. Half-grown. Mexico. From M. Salle's Collection. 



B. Black colour predominant. 



/. Adult. North America. 



g. Adult. Mexico. From Hugo Finck's Collection. 



k. Adult. Berbice. 



i. Adult. North America. 



k. Half-grown. Brazil. 



/. Half-grown. Brazil. Presented by Edward Cook, Esq., R.A. 



in. Young. Interior of Brazil. From Dr. Gardiner's Collection. 



n. Young. North America. From the Haslar Museum. 



<>. SPILOTES PCECILOSTOMA. 



Coluber pcecilostoma, )Vied,Beitr. p. 251 ; Abbildg. x. t. 1,2. 

 Tiiamnobius pcecilostomus, Fitz. Syst. Rept. p. 26. Natrix sul- 

 phurea, Wagl. £f Spix, Serp. Bras. t. .9 (the Caninana) ; Schleg. 

 Ess. t. 6. f. 5, 6. Spilotes pcecilostoma, Dum. ty Bibr. vii. p. 221. 



Scales keeled, large, in twenty-one rows; three posterior 

 oculars. Colour variable, yellowish or olive or brown, with 

 more or less distinct, darker, irregular, oblique cross bands ; 

 keels strong, forming together longitudinal brown lines. 



ri. Adult : bleached. North America. 



A. Male. Lips, chin, and front of belly yellow. 



b. Adult. Brazils. Presented by Lord Stuart. 



c. Half-grown. North America. From the Collection of the 



Zoological Society. 



B. Female. Lips, chin, and front of belly reddish brown. 



d. Adult : injured. Demerara. From Mr. Snellgrove's Col- 



lection. 



e. Adult. North America. Presented by the Zoological Society. 



7. Spilotes pcecilonotus. 



Scales in twenty-one or twenty-three rows, those of the back 

 keeled ; two posterior oculars. Above uniform brown, some 

 scales of the medial row yellow with black tip ; bead yellowish, 

 variegated with blown ; belly anteriorly uniform yellowish, pos- 

 teriorly uniform black. 



a. Adult. Honduras. 



/;. Adult,. Mexico. From Hugo Finck's Collection. 



Description. — Body elongate, compressed ; tail slender ; head 

 moderate, rounded in front, distinct from neck ; eye large ; mouth 



