Reptiles <tnd Ai)ij)Jiihi(i}is of lU'niois. 365 



The following will separate the two species known to 

 occur in Illinois! 



With fourteen costal grooves. Palatine series of teeth extend- 

 ing outside the inner nares. Color hlack, with gray spots, 

 most numerous on the sides. Moderately stout. 



P. GLUTINOSUS. 



With from sixteen to nineteen costal grooves. Palatine teeth 

 not extending outside the inner nares. Color dark gray, 

 with or without a red longitudinal dorsal l)and. - Rather 

 slender P. erythronotus. 



Plethodon glutinosus, Green. Gray-spotted Salamander. 



Salamandra glutiiiosa, Green, Jour. Acad. Nat. Sci. Pbila., 1818, 

 I., p. 357.— De Kay, Nat. Hist. N. Y., I., ZoOl. III., Rept. and 

 Amph., 1842, p. 81, pi. 17, fig. 42.— Holbr., N. A. Herp.. 1842, 

 p. 39, pi. 1©. 



Plethodon (jlutinosa, Baird, Jour. Acad. Nat. Sci. Phila., 2d Ser., 

 1849, p. 285. 



Cylindrosoma glutinosum, Dum. et Bibr., Erp. Gen., 1854, IX., 

 p. 80. 



Plethodon fflutino.ms, Cope, Proc. Acad. Nat. Sci. Phila., 18<?9, 

 pp. 99, 100.— Smith, Tailed Amphibians, 1877, p. 66.— Bou- 

 lenger. Cat. Batr. Sal. in Coll. Brit. Mus., 2d ed, 1883, Sal, 

 Caudata, p. 56.— Davis and Rice, Bull. 111. State Lab. Nat. 

 Hist., I., No. 5, 1883, p. 12; Bull. Chicago Acad. Sci., 1883. 



Length, including the tail, about five and a half inches. 

 With fourteen costal folds. Body slender. Head depressed. 

 Eye prominent, no tubercle in its anterior angle. Palatine 

 teeth in two series which extend outside the inner nares. 

 Tongue large, nearly circular in outline, attached for about 

 three fourths its length by a narrow strip along its middle, l)e- 

 ginning near the anterior margin. Tail cylindrical at its base, 

 gradually tapering to the tip, very slightly compressed distally, 

 no membranous expansion. 



Color above and below Iduish l)lack in adults, Ijrownish 

 black above and pale brownish below in young, with numerous 

 small grayish white spots, which are often aggregated on the 

 sides or form larger white l)lotches there. Throat, gular fold, 

 palms, soles, digits, and under side of the tail more or less 

 brownish. 



