MUSEUM OF COMPARATIVE ZOOLOGY. 



209 



Table G l — Individual Variation in the Proportion of Length to 

 Alar Extent. 



from within a short distance of Cambridge. A very few are from 

 Southern Maine and from the Connecticut valley at Springfield ; 

 but the general faunal character of all these localities is essentially 

 the same.* 



In addition to the measurements given in these tables, several others 

 are sometimes taken by collectors, as the relative posterior extent of the 

 outstretched feet and the wing, as compared with the tail. As they are, 

 however, among the most variable of proportions, and are likewise 

 among the most difficult measurements to take with accuracy, they have 

 been here neglected. 



* In consequence of the small size of these pages, it has been found impracticable to 

 Include the names of the localities, the date of collecting, and the name of the collector 

 in the tables, as would have been desirable. 

 VOL. II. 14 



