bars. Preserved specimens may approach the appearance of R. 

 cantabrigensis, or with few or no spots may suggest the green frog, 

 R. clamitans. 



Structure: Male with thumb enlarged and webs of hind foot tend- 

 ing to become convex as in Rana sylvatica; tip of fourth toe free; no 

 dark cheek patches; no red on sides. 



Voice: The male is without lateral vocal sacs. 



Breeding: They breed from March to July. The egg mass is about 

 a pint in bulk. The egg is 1/12 inch (2 mm.), the outer jelly envelope 

 2/5-3/5 inch (10-14 mm.) (adapted from Dickerson, 1906, p. 219.) 

 The envelopes are large and the eggs appear far apart. The tadpoles, 

 2 1/4-2 4/5 inches (56-70 mm.) with tooth ridges 3/3, transform from 

 June to August at 5/8—7/8 inch (16-23 mm.). 



Notts: "Common along streams, but nowhere plentiful. A stupid 

 frog, easily caught; neither a strong jumper nor a fast swimmer. The 

 salmon color of the underside is absent from the newly transformed 

 adult; it increases in extent and brilliancy with increase in size, oc- 

 casionally overspreading nearly the entire under surface in a large 

 adult. About one hundred specimens secured." — (Frank N. Blanch- 

 ard, 1921, p. 6). 



"There would seem to be little doubt that the mature and trans- 

 forming tadpoles taken at Brent's lake on July 1, with an average 

 body length for all of 21.98 mm., and for the eleven larger specimens 

 of 27.63 mm., belonged to the brood of the preceding year and had 

 wintered over as tadpoles, and consequently were ready to begin 

 transformation earlier in the summer than those nearer the coast 

 (Puget Sound) which go through their metamorphosis in the same 

 year in which they are hatched." — (E. B. S. Logier, 1932, p. 324). 



Nevada Spotted Frog. 



Rana pretiosa luteiventris Thompson. 



(In the present state of our knowledge we feel inclined to follow 

 Boulenger in combining R. p. pretiosa and R. p. luteiventris). 



Range: Southeastern Washington, eastern Oregon, northeastern 

 California, northeastern Nevada, and probably other interior parts. 



Habitat: Irrigation ditches. Is quite aquatic. 



Size: See R. p. pretiosa. 1 3/4-3 1/2 inches (44-87 mm.). 



General appearance: Like R. p. pretiosa. 



Structure: Tubercle at base of fourth toe absent in the mature 

 frogs. Palmar tubercle lacking or less distinct than in R. p. pretiosa. 



Voice: Not on record. 



Breeding: The tadpoles are quite large, 4 inches (101 mm.), the 

 tooth ridges 2/3. 



183 



