338 KANID.E. 



upper parts, constantly varying under atmospheric 

 influences, often suggests the colour of dry leaves, 

 among which the frog is, in fact, not unfrequently met 

 with in woods, and under which it seeks shelter when 

 pursued. Woods, together with swampy meadows 

 and banks overgrown with long grass, constitute its 

 usual abode. It is never found in fields or gardens, or 

 amono; roadside brambles and nettles like the common 

 frog, which, however, often associates with it in the 

 wilderness. The voice is feeble and clear, and may be 

 rendered by co, co, co, or cor, cor, cor, uttered rapidly. 

 Rana agilis is found in the water only during the 

 breeding season, which falls in France usually three 

 or four weeks later than in R. tem/poraria, between the 

 middle of February and the beginning of April, isolated 

 individuals spawning exceptionally as tardily as May : 

 in Lower Austria, according to Werner, the breeding 

 season of the two species coincides, and takes place in 

 the latter half of March. The eggs are usually 

 deposited on the borders of small ponds or pools in 

 flooded quarries. Specimens from Turin sent to me 

 the winter before last by my friend Count Peracca, 

 spawned in an aquarium out of doors on the 20th and 

 21st of February; owing to the cold weather and 

 frosty nights that followed, the development of the 

 eggs was at first almost completely arrested, and the 

 first embryos did not emerge from the mucilage until 

 the 15th of the following month. 



The young leave the water by the end of June or 

 beginning of July, rarely as late as the middle of 

 August. 



The pairing takes place as in R. temjporaria, but is 

 of much shorter duration, the females usually resortiug 

 to the water only at night, and when quite ready to 

 spawn. Specimens in embrace are therefore seldom 

 observed in the daytime. The males do not, generally 

 speaking, show the same genesic frenzy as the common 

 frog, seldom seizing females of other species in the 

 absence of legitimate mates ; they often hibernate in 



