142 



VERTEBRATE ANIMALS OF THE UNITED STATES 



A. tigriniim (Green). Tiger salamander (Fig. 69), Body 

 thick and massive, dark brown in color, with many large rounded 

 or irregular yellow spots which may be confluent; length 250 mm.; 

 tail 125 mm.; costal grooves 12; vomerine teeth in one long transverse 

 band: the entire United States, except New England and the Appa- 

 lachian region; the ^Mexican Plateau; common west of the Appalachians. 

 The larva was formally supposed 

 occasionally to become sexually 

 mature and to breed. / /^ ^ rv^^V — 1 



A. jefersonianum (Green) (Fig. f /^J<^ ^^^^^i^^i,X_\ - 9 

 70). Body long and slender, brown- 

 ish or blackish in color, with pale 

 dots which may be wanting; digits 

 very long; no plantar tubercles, or 



—5 



Fig. 71. — Inside the mouth of Aynby- 

 sloma texanum: i, inner nares; 2, vomerine 

 teeth; 3, tongue {from Hay). 



Fig. 70. — Roof of mouth of Ambysloma 

 jeffersonianum: 1, inner nares; 2, vomerine 

 teeth {from Cope). 



a single indistinct one; length 150 mm.; tail 75 mm.; costal grooves 

 12: northeastern States and Canada; northward to Hudson Bay; 

 southward and westward to Virginia and Illinois; common northward. 



A. cingidatum Cope. Body slender, black in color, speckled, with 

 gray underneath, and a series of narrow gray rings encircling it from 

 the eyes to the tip of the tail; head elongate; length 85 mm.; costal 

 grooves 14: South Carolina to northern Florida and Alabama.. 



A. texanum (Matthes) {A. microstomum Cope) (Fig. 71). Body 

 elongate, slender, brown or blackish in color, with numerous grayish 

 spots on the sides; limbs weak; digits very long; length 150 mm.; tail 65 

 mm.; costal grooves 14: central States, Ohio to Texas; often common. 



A. gracile (Baird). Body stout and reddish brown or blackish in 

 color, with or without spots; length 180 mm.; tail 102 mm.; costal 

 grooves 11; no plantar tubercles; eyes very large; vomerine teeth in 

 4 small patches, forming a transverse series: California to British 

 Columbia. 



A. macrodactylum Baird {A. stejnegeri Ruthven). Body elongate 

 and slender, brownish in color, with a broad lighter dorsal stripe; 



