Crotalinae. 



MAPS SHOWING THE DISTRIBUTION OF TYPICAL VENOMOUS SNAKES. 



Fig. 68. — i. Distribution of the Colubrine family of snakes, viz. Africa, Southern Asia, to Australia, 

 Central and South America. The true Cobras (Naja or Naia) inhabit Africa, Southern Asia 

 and the Malay Archipelago only. 



2. The parts coloured black show the distribution of the Viper, otherwise known as the Adder 

 family of snakes. 



3. The parts coloured black show the distribution of the Pit Vipers to which the Rattlesnakes 

 belong {CrotaliiiiB). 



New Zealand is the only country in the semi-tropical regions in which snakes do not occur. 

 There are snakes in Madagascar of the Aglypha and Dipsadomorphine kinds, but no 

 Proteroglypha or front-fanged snakes. 



161 M 



