SWANTON] INDIANS OP THE SOUTHEASTERN UNITED STATES 7 



the central Gulf area. In July the condition is reversed. Begin- 

 ning in east central Texas, the amount of precipitation falls off 

 rapidly to less than 20 inches in the western part of that state. 

 Naturally, droughts are most frequent there. (See maps 6 and 7.) 



Climatic provinces similarly located with reference to the land 

 masses and rainfall are found in South America, Asia, Africa, and 

 Australia. The related South American province includes Uruguay 

 and adjacent portions of Brazil and Argentina. The Asiatic province 

 covers northern and central China. The analogous Australian prov- 

 ince embraces most of New South Wales and the southeastern part of 

 Queensland, while the African province is a very small territory in 



Map 6. — Average annual rainfaU in the Southeast (in inches). (After PauUin and Wright.) 



the eastern part of Cape Colony and the lands adjacent toward the 

 north. (See map 8.) Later I shall institute a comparison between 

 the cultures of the inliabitants of these several regions. 



Life zones (map 9). — Biologists have classified the territory occu- 

 pied by the tribes which are the subject of the present bulletin as 

 follows (numbers and letters refer to those on the map (p. 9) ) : 



Boreal Region: 



Canadian Zone: A few of the higher summits of the Allegheny Mountains (1). 

 Austral Region : 



Transition Zone 

 The Alleghanian Faunal Area: A strip of territory along the Alleghany 



