Raiia virgatipes 449 



We have, therefore, sizes from 23-31 mm. 



General remarks. All the tadpoles taken at Lakehurst, X. J., May 22-23, 

 1924, were of the Rana damitans type. All of them seem to have the left arm 

 coming out first. 



Transforming R. damitans from Ithaca and Adirondack Alts., N. Y., and 

 R. virgatipes from Lakehurst, N. J., compared are as follows: 



Underparts and rear of hind legs and belly heavily blotched with black in 

 Rana virgatipes; finely dotted with black in Rana damitans. Light color of 

 under legs and belly to the level of fore legs, in fact to the chin, is white in 

 Rana damitans, in Rana virgatipes underparts to level of fore legs with some 

 vinaceous tint. Chin with few if any spots and greenish yellow or sulphur 

 yellow in Rana virgatipes: spotted in Rana damitans. Stripe on upper jaw 

 down to middle of side or farther sayal brown, clay color, or tawny olive or 

 buffy brown in Rana virgatipes; stripe in Rana damitans only to the shoulder, 

 lettuce green or calliste green on snout to light yellow green or sulphur yellow 

 near the shoulder. 



GROWTH 



C. S. Brimley (1909, p. 133) has supplied notes on the smallest specimens, 

 taken at Lake Ellis, Craven Co., N. C. ''Six specimens taken in 1906 and 38 

 in 1907, none being over 45 mm. in length of head and body. These little 

 frogs were found in shady places wherever there was water and in such situa- 

 tions acted much like cricket frogs, almost always coming to the surface im- 

 mediately after jumping into the water, and seldom diving to the bottom and 

 hiding there." 



In the U. S. National Museum, Nos. 36629-31 were taken by Brimley 

 Bros. May 11, 1906, from Lake EUis and measure 32, 36, 42 mm. respectively. 

 The following May (24 and 25) 1907, J. Hurter secured Xos. 57675-78 from 

 the same place. They measure 43, 42, 38 and 39 mm. respectively. A speci- 

 men (U. S. Nat. Mus. No. 55447) secured at Lakehurst, N. J., by W. D. 

 Appel May 28, 1905, measure 35 mm. Two specimens (U. S. Nat. Mus. Nos. 

 37850-51) from the same place taken June 29, 1907, by W. T. Davis measure 

 40.5 mm. and 42 mm. The first specimens our collection ever received were 

 two taken by Mr. W. T. Davis at Lakehurst, N. J., May 27, 1906. They are 

 36 and 47 mm. — apparently two growth sizes. 



My material falls into these groups: 23-30 mm. at transformation; 36-38 

 mm. one year old; 40-48 mm. 2 year old, and 49-55 3 j^ear old. The National 

 Museum material is from 32-39 mm. i year old; 40.5-47 mm. 2 year old, and 

 52-55 mm. 3 year old. Boulenger's (1920, p. 431) material falls into three 

 groups: 32-36 mm. i year old; 43 mm. 2 year old; 50-56 mm. 3 year old. In 

 general we believe they transform at 23-29 mm., or even at 31 mm., reach 

 32-39 mm. for i year olds, 40-48 mm. for 2 year olds, 49-56 mm. for 3 year 

 olds. The males begin to have enlarged thumbs and somewhat enlarged 

 vocal sacs at i year old. Might possibly breed at i| years old. Certainly 

 both males and females breed at 2 years and attain near maximum at 3 years. 



Since the above was written I have examined the material in the Acad, of 

 Nat. Sciences, Phila. Cope's material of Oct. 1891 falls into sizes 31, 35, 49, 



