Hurter — Herpetology of Missouri. 123 



the snout to the anus; a narrow light line along the posterior faces of 

 the tarsus; the sides are frequently black-spotted, sometimes only 

 marbled with brown; the femora and tibiae are indistinctly cross- 

 banded. The upper and lower lips are dark-edged, the lower with light 

 colored interruptions. A brown band on the front of the humerus. 

 Throat and thorax marbled with light brown. Posterior face of femur 

 light brown, marbled with darker brown. (Cope.) 



Size. — Head and body 64 mm.; from tip of snout to axilla 16 mm.; 

 femur 21 mm.; tibia 23 mm.; tarsus and fourth toe together 38 mm. 

 This specimen was presented to me by Mr. Alexander G. Ruthven of 

 Ann Arbor, IMich., who collected it at Isle Royale in Lake Superior. 



Habitat. — Northern North America. In the Report of 

 the Smithsonian Institution for 1864 is given the Journal 

 of an Exploration of Western Missouri in the year 1854, 

 by Dr. P. E. Hoy, who collected in Cooper County four 

 Rana cantahrigensis, which are still in the National Mu- 

 seum under the catalogue number 3,457. On the strength 

 of this I have included this species in my list. 



Habits. — As I have never seen this frog in his haunts 

 and as other observers give only meagre accounts of its 

 life history, I shall quote from Mary J. Dickerson's Frog 

 Book as follows: — "This frog has the same delicacy of 

 beauty, the same gentleness and alertness of expression, 

 possessed by the Eastern Wood Frog. It would be sur- 

 prising to find any great difference in its habits. It is 

 probably silent, except in the breeding season, and is 

 more thoroughly a land frog than are most of the species 

 of Rana." 



34. Rana sylvatica LeConte. Wood Frog. 



Rana silvatica, Rana temporaria var. silvatica, Rana pennsylvanica. 



DescripUon. — A rather slender frog, with a broad head and long legs. 

 Length of head contained in length of head and body 3 to 3.5 times. 

 Snout rather pointed, the canthus rostralis distinct. Byes prominent. 

 Loral space concave. Nostrils oblique, situated just below the canthus 

 rostralis and half way between the eye and the tip of the snout. Tympa- 

 num moderate, about two-thirds the diameter of the eye. The tongue 

 is elongated, much longer than broad, free behind for half its length, 

 and on the sides, the two cornua prominent. Teeth in two small, slight- 

 ly elongate patches, placed with the axis inclined a little backwards. 



