18 PROCEEDINGS OF THE ACADEMY OF [Jan., 



Key to Eastern Plethodotitidce. 



a. — Tongue free in front. 

 6. — Toes 5. 

 c. — A line from eye to nostril. 

 d.- — Line from eye to nostril black and \ight...Gyrinophilus danielsi^ 



dd. — Line from eye to nostril light only G. porphyriticus* 



cc. — Xo line from eye to nostril. 



e. — Tail short; color red Spelerpes ruber* and allied forms 



ee. — Tail long. 



/, — Color orange; tail spotted S. maculicaudus 



ff. — Color yellow. 



g. — Tail barred S. longicaudus* 



gg. — Tail banded. 



h. — Two lateral stripes, but no dorsal stripe S. hisUneatus* 



hh. — Two lateral stripes and a dorsal stripe S. guttolineatus 



66.— Toes 4. 



i. — Yellow, with dark lateral stnpe...Mancidus quadridigitatus 

 ii. — Black M. reniifer 



aa. — Tongue not free in front. 

 j. — Toes 5. 

 k. — Internal nostrils very inconspicuous and twice as far 

 apart as external nostiih.. Lewognathus marmoratus^ 

 kk. — Internal nostrils conspicuous, about far apart as 

 external nostrils. 

 /. — Light line from eye to angle of jaw. 

 711. — Tail keeled. 



n. — Belly plain, black Desmognathus quadrimaculata^ 



nn. — Belly plain, light D. monticola\ 



7inn. — Belly mottled lighter D. fusca* 



nnnn.- — Belly mottled dark D. fusca auriculata 



7nm. — Tail cylindrical. 



0. — Belly light D. ochrophwa* 



00. — Belly dark D. caroli7iensis^ 



II. — No light line from eye to angle of jaw. 



p. — Vomerine and parasphenoid series of teeth 



continuous Stereochilus 7narginatus 



pp. — Vomerine and parasphenoid series of teeth 

 not continuous. 

 q. — Body color uniform plumbeous. 



r. — Legs red Plethodo7i sherma7ii'\ 



rr. — A yellow stripe from eye to gular fold, 



P. jorda7ii\ 



rrr. — No marldngs. 

 .s. — Belly plain-colored. 



t. — Costal grooves 14 P. 77ietcalfi\ 



tt. — Costal grooves 17 P. wehrlei* 



ss. — Belly mottled; costal grooves 19, 



P. erythroTiotus* 



