AMERICAN FROGS OF THE GENUS RANA. 479 



fold from above the tympanum to the groin, the distance between the 

 two folds, on the back, i to 3- the length from snout to vent; lower 

 parts smooth. 



Grayish or reddish brown above, back uniform or with numerous 

 small irregular bluish green spots; sides of head and body, below the 

 canthus rostralis and the lateral fold, which may be better defined 

 by a light line, darker brown or blackish brown; a white or whitish 

 streak on the upper Hp, continued to above the axil; limbs with dark 

 cross-bands; hinder side of thighs black with a few large golden spots; 

 lower parts white, throat and breast often brown or mottled with 

 brown; belly sometimes spotted or marbled with brown. 



Male without vocal sacs, with the fore limbs very robust and with a 

 strong pad on the inner side of the first finger. 



Nasal bones small, oblique, widely separated from each other and 

 from the frontoparietals; upper part of ethmoid exposed in front. 

 Terminal phalanges with feeble transverse expansion. 



Eggs measuring 1| millimeters in diameter, in females 57 millimeters 

 in length from snout to vent. 



Mr. G. K. Noble, Bull. Amer. Mus. N. H. XXXVIII, 1918, p. 318, 

 has raised doubts as to Ranula chrysoprasina Cope, 1866, from Costa 

 Rica, being a synonym of R. coeruleopundata, and suggested the 

 possibility of the t^-pe, now apparently lost, being an aberrant speci- 

 men of R. palmipes. Against this we have Cope's statement that the 

 loreal region is vertical, which cannot apply to R. palmipes, and that 

 the back of the thigh bears "a few golden spots on a black ground 

 behind," which is highly characteristic of R. cceruleopundata. The 

 web is too short for a R. palmipes; " toes fully, not widely palmate, 

 three distal phalanges of fourth free." The apparent contradiction 

 between fully webbed toes a-nd three phalanges of fourth free is no doubt 

 the result of a misprint: "feebly" should be used for "fully." The 

 British Museum has received large collections from Costa Rica, in- 

 cluding specimens of R. caeruleo punctata, but no R. palmipes was 

 among them. 



Habitat. — Nicaragua and Costa Rica, up to 1600 meters. — The 

 types, with which some of our specimens perfectly agree, are preserved 

 in the Vienna Museum, their place of origin unknown. 



