AMPHIBIANS 155 



gj Vomerine teeth separated from the 

 parasphenoid teeth, 

 hi Palm without plantar tubercles. ... 3. Plcthodou. 



ho Palm with 2 plantar tubercles 5. Ensatina. 



da Front teeth alone present and projecting from the 



closed mouth 6. .1 neidcs. 



c-i Hind foot with 4 toes. 



di In the eastern States 4. Hemidactylium. 



d-i On the Pacific slope 7. Batrachoseps. 



b'j Tongue free at its anterior margin, being attached by 

 a central pedicle (Fig. 77). 

 Ci Toes not webbed. 



di With a light line running from the eye to the 



nostril 11. Gyrinophilus. 



d-i No such line present. 



ei Vomerine teeth continuous with parasphenoid 



teeth; color red 12. Psciidotriton. 



Gi \'omerine teeth separate from the parasphe- 

 noid teeth (Fig. 80) 13. Eurycea. 



c-j Toes webbed 14. Hydromantes. 



I. Desmognathus Baird. Body of medium or small size; tongue 

 attached, except by its lateral margins; premaxillaries united; vertebrae 

 opisthocoelous ; vomerine teeth wanting in adult males of some species; 

 a light line from the eye to the angle of the mouth: 5 species. 



Key to the Species of Desmognathus 



ai Tail keeled above; large species, 

 bi Belly mottled. 



Ci In States east of the Mississippi D. Jiisca. 



C2 In Arkansas D. brimlcyorum. 



bo Belly uniformily colored. 



Ci Belly black D. quadramaculdla. 



Co Belly light D. monticola. 



Z.2 Tail cylindrical; small species D. ochrophcea. 



D.fusca (Rafinesque) (Fig. 72). Body rather stout, brown above, 

 mottled below; length 115 mm.; tail 58 mm.; costal grooves 14; 

 vomerine teeth not present in mature males; parasphenoid teeth in 

 2 separated patches: southern Canada to the Gulf; westward to lUinois, 

 Tennessee and Louisiana; common. 



Subspecies of D. fusca 



D. j. fusca (Raf.). Belly hght; no spots on the sides: southern 

 Canada to central Alabama, Georgia and southeastern Virginia, 

 except in the higher mountains. 



