22 BIRDS OF THE 



way farther north ; the records indicate also 

 that in general the summer resident birds 

 have arrived in their haunts in the suburbs 

 and neighboring country some days earlier 

 than any individuals of the respective spe- 

 cies have shown themselves in the Garden. 

 Thus, if we make use of the dates of usual 

 arrival of species in this neighborhood, as 

 given in Mr. Brewster's *' Birds of the Cam- 

 bridge Region," we find, for example, that 

 in the case of twenty common resident 

 species, selected for comparison, the first 

 individuals in the series of years have ar- 

 rived in the Garden from three to eight 

 days later than in the surrounding country 

 and that the range of first arrival of each 

 of these species in the nine years has been 

 from three to nineteen days later. The 

 twenty examples will be given : kingbird ar- 

 rives from four to fifteen days later ; phoebe 

 from four to twelve days later; least fly- 

 catcher from eight to fifteen days ; vesper 

 sparrow from five to eighteen days ; chip- 

 ping sparrow from six to seventeen days; 

 towhee from eight to fifteen days ; scarlet 



