COPEIA 47 



'tween the overlapping lily pads with just the head 

 protruding, while in the center of the pond where 

 there were only isolated plants, the frogs disappeared 

 before we saw them, the "wake" near a lily pad indi- 

 cating their former presence. 



In the outlet to Otter Lake (Ten Mile Creek 

 between Lake of Bays and Otter Lake) Ave found 

 them common, July 24, on muddy bottoms where 

 water lilies were abundant. In the same kind of situ- 

 ation they occurred on Porridge Lake, July 28. An- 

 other habitat we discovered August 31 was a beaver 

 lake where Cassandra and all the associated heath- 

 like plants grew. Finally, on Fletcher Lake, Sep- 

 tember 1, we found them in the shallow, sandy shores 

 amongst pipeworts (Ericaulon articulatum) . 



After July loth and 16th we heard no more 

 choruses. On the latter date we captured one or two 

 frogs with the stump of the tail remaining. These 

 were about 38 mm. (I 1 . 1 inches) from snout to vent, 

 or little below the two largest individuals taken (49 

 mm. or 2 inches). The other specimens which were 

 not lost measured 47, 42, 42, 43, 40, 40 mm. respec- 

 tively. None of these eight specimens had fully de- 

 veloped eggs, though one female surely would have 

 bred the following year.. The middle of July, when 

 the chorus was recorded, accords well with Garnier's 

 observed season of breeding for this species, but we 

 had small opportunity to determine if it obtained at 

 Otter Lake. 



This species cannot be called solely a river spe- 

 cies; it has a "chant amour" which at chorus season 

 can be heard one-third to one-half of a mile away ; the 

 name "mink frog" seems very apropos for this spe- 

 cies, at least for Ontario specimens; the tadpoles re- 

 main at least one winter in this stage and transform 

 at a size approaching that of the adult. The season 

 of breeding, the length of larval period, the size of 

 transformed frog place it with the green frog and 

 bull frog. Neither of these species seemed to be asso- 



