THE BATRACHIA OF NORTH AMERICA. 



355 



under way, during the first bright days of spring, the shrill cry or 

 whistle of this little cfeatuce begins to enliven the colder swamps and 

 meadows of the hill country. Different individuals answer each other 

 with dififerenfely toned voices of a single note. This is exceedingly shrill 

 and loud; the muscular force employed in expelling the air from the 

 lungs seems to collapse the animal's sides till they nearly meet, while 

 the gular sac is distended with each exi^nlsion to half the size of the 

 head and body together. They are chiefly noisy in the end of the 

 afternoon, but in shady situations or on dark days may be heard through 

 the morning and noon. When the breeding season is over they may 

 be still found, but with difficulty, among fallen leaves in low places, 

 where their color admirably adapts them for concealment, or in cellars, 

 or on the ground in the woods. IsTot till the near approach of autumn 

 do we have evidence of their ascent into the trees. Then, when the 

 wind is casting the first frosted leaves to the ground, a whistle, weaker 

 than the spring cry, is heard, repeated at intervals during the day, 

 from one part of the forest to another, bearing considerable resem- 

 blance to the note of the purple finch {Carjjodacus purpureus), uttered 

 as it is while flying. These voices are heard during the same season, 

 that of the Hyla being distinguishable as slightly coarser, or more like a 

 squeak. Both are associated with the weak chirp of the late Den- 

 droeca coronata as it gleans its insect food on its southern flight. These 

 are the latest sounds of autumn, and soon disappear before the steady 

 advance of the ice king. 



Hyla pickeri7}gii Holhroo^. 

 KESEKVE SERIES. 



Catalogue 



No. of 



number. 



spec. 



3604 



1 



3C09 



1 



3602 



1 



3603 



I 



3608 



2 



3505 



1 



3C10 



1 



9669 



1 



5380 



2 





2 





1 





1 





7 



13325 



10 



Locality. 



Aux Plaines River, 111 . . 



Marietta, Ohio 



Carlisle, Pa 



Abbeville, S.C 



Boston, Mass 



Elizabetbtown, N. Y 



Carlisle, Pa 



Prince George's County, 

 Md. 



Selkirk Settlement 



Cambridge, Mass 



do 



Grosse Island, Mich 



Ann Arbor, Mich 



Uook County, III 



Washington, D. C 



When 

 collected. 



From whom received. 



R. Konnicott 



Prof. E. B. Andrews 



Prof. S. F. Baird 



Dr. J. B. Barratt 



Prot. L. Agassiz 



Prof. S. F. Baird 



, do 



Dr.T.H.Bean 



R. Kennicott 



Prof. L. Agassiz . .. 



C.Girard 



Rev. Charles Fox . . 



Dr. A. Sager 



R. Kennicott 



George Shoemaker 



Nature of spec- 

 imen. 



Alcoholic. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 



Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 



HYLA REGILLA Baird and Girard. 



Proceedings Academy Philada., vi, 1852, p. 174; Girard U. S. Expl. 

 Exped., Wilkes, 1858-1860, iii, figs. 13-18. 



Proportions somewhat as in H. versicolor. Canthus rostralis distinct, 

 rather elevated ; muzzle obtuse. Digital dilatations rather small ; 

 fingers free; toes half webbed or less. ISTares and choanee small; vom- 

 erine teeth in fascicles between former. Tongue large, nearly half free, 

 emarginate. Tympanum les§ than half eye. Skin above usually 



