LIFE HISTORY OF DESMOGNATHUS FUSCA. 



295 



ADULT PERIOD. 



It will be noted that in the above table the number of examples collected during 

 September and October is greatly in excess of the number collected during the 

 other months of the aquatic larval period. This fact is not due, as would seem 

 to be indicated, to a greater abundance of the material during these months, but 

 rather to the fact that these happen to be the months when most of my collection 

 of Desmognathus material for laboratory purposes is made. 



and spring, and to cover a somewhat variable period of from 

 8 to 10 months. The perennially running brooks in which they 

 live are of course spring fed and do not freeze solid even though 

 they are very shallow. In fact the brook which I have particu- 

 larly studied as a typical Desmognathus habitat is said to never 



