136 BIRDS OF THE PUBLIC GARDEN 



60. BARN SWALLOW 



Hirundo erythrogaster 



In three of the seasons the Barn Swallow 

 has not been observed, namely, 1901, 1903, 

 and 1906. But in 1905 and again in 1907 

 during several days in succession in May 

 a single bird or two, or a flock numbering 

 sometimes a dozen or fifteen birds, was 

 seen. On May 16, 1905, as many as fifteen 

 Barn Swallows were skimming the air in 

 ceaseless flight ; and on May 29, 1907, about 

 a dozen birds were seen, and the following 

 day also nearly as many. 



No visit of the species has been noted 

 earlier than May 9, in 1900, and most of the 

 visits have been in the latter half of May. 

 In 1908 one bird was recorded on June 2. 



61. TREE SWALLOW 



Iridoprocne tricolor 



There are but four records of the presence 

 of the Tree Swallow or White-bellied Swal- 

 low in the Garden. These appearances have 

 not occurred in the earlier period of migra- 



