6 
emy of Science at Salem, and where the species & 
has not been collected and its occurrence is only 
known by the testimony of some writer, it is so 
stated in the list. 
Several errors have been detected in early 
local lists and corrected, and such notes added 
to the paper as seem of interest locally or 
otherwise. 
The writer can only in a general way here 
thank those who have assisted him in his work, 
and he trusts that the mention of their names 
in the following pages will be accepted as ac- 
knowledgments of his indebtedness. 
PEABODY ACADEMY OF SCIENCE, 
SALEM, 1880. 
