522 The Philippine Journal of Science 1923 



When I prepared my description of Rana magna for my Phil- 

 ippine Amphibia, 7 1 had before me specimens of this new species 

 and a large series of specimens belonging to R. magna, both of 

 which at that time I regarded as merely geographical and age 

 variations of R. magna. The principal variations were recorded. 



In my collections made in 1921 on and about Mount Maquiling 

 I noted that two distinct forms occurred in the same locality, 

 and with large series of both it was possible to separate the two 

 forms without difficulty. 



Rana woodworthi differs from the species which I identify as 

 R. magna Stejneger in the presence of a dorsolateral glandular 

 fold, a smaller eye, a less-pointed snout, a loreal streak, and a 

 strong tympanic spot. In R. magna the toes are webbed to the 

 tip. In specimens of the two species having the same snout- 

 to-vent measurements R. magna is less slender, and somewhat 

 shorter limbed. The young of R. magna do not have dorso- 

 lateral folds! 



The type specimen was collected from a small, nearly dry 

 stream bed which lies between Camp Eldrige, Los Bafios, and 

 the College of Agriculture. The frogs were perched along the 

 edge of small stagnant pools. Numerous specimens were taken. 



The species is named for Harold Evans Woodworth, professor 

 of entomology, College of Agriculture, Los Baiios. 

 Rana magna Stejneger. Plate 1, fig. 3. 



Rana magna Stejneger, Smithson. Misc. Coll. 52 (1909) 437; Taylor, 

 Amphibians and Turtles of the Philippine Islands (1922). 



I collected specimens of this species in Kalinga, Bontoc, If ugao, 

 and Benguet Subprovinces, Laguna and Bataan Provinces, Luzon 

 Island; and on Polillo, southeastern Mindanao, and Basilan Is- 

 lands. I have recently obtained specimens from southern Negros 

 through the courtesy of Dr. Albert C. Herre. 



The specimens vary more or less in the character and number 

 of the tubercles on the back, the relative position and size of 

 the tympanum, and the size of the eye in relation to the length 

 of the snout. In the material at hand I have been unable to find 

 stable characters that would separate the species into varieties. 

 In Palawan a related species occurs which has been regarded by 

 other authors as Rana macrodon. It is, however, well differen- 

 tiated from that species by the presence of the vocal sacs in the 

 male and the absence of well-defined canthi rostrales. It is 

 described in this paper as R. acanthi sp. nov. 



T Philip. Journ. Sci. 16 (1920) 243, pi. 2, fig. 2. 



