An Addition to the List of Staten Island Frogs^ 



William T. Davis 



Between the railroad station at Annadale and Seguine's Pond, 

 there are several marshy places and one little artificial pond. 

 For several years we have heard in these lowlands, from the 

 middle of Alarch to the first week in May, the song of what we 

 considered to be the swamp tree frog, Chorophilus triseriatus 

 (Wied.). ]\Ir. James Chapin first called attention to the frogs, 

 and several efforts were made to secure specimens, but owing to 

 the small number of individuals and the unfavorable character 

 of the days at our disposal, which were either too windy or too 

 cold, we were unsuccessful. 



On the twenty-ninth of last March, a warm and quiet day, I 

 visited Annadale with the hope of finding the frogs. While I was 

 at a distance several were heard in the little pond, and after much 

 waiting one sang again. The day was so quiet that the surface 

 of the grassy pond could be minutely examined with a glass, and 

 it was not long before the yellowish colored air sack at the throat 

 of the frog could be seen as it dilated or subsided with his song. 

 It was an easy matter to Avade with almost imperceptible progress 

 tOAvard the little frog and finally to capture him with a sudden 

 stroke of the net. There were at least five males in the pond, 

 and two were collected, the others being left to keep alive the 

 colony. 



When all is quiet these little frogs raise themselves considerably 

 above the water and expand their air sacks and sing. If slightly 

 disturbed they often withdraw, leaving only their eyes and nose 

 above water. A trifle more disturbance and they retire com- 

 pletely. 



They keep the air sack distended often for fifteen or twenty 



^ Presented April i6, 1910. 



66 



