206 THE AMERICAN MIDLAND NATURALIST 



This is also my latest spring record for the species. In 1916 the 

 bird was found first on April 10, and last on April 26; in the spring 

 of 1915 no records of the Purple Finch were obtained. These dates 

 indicate that the present year was an unprecedented one for the 

 Purple Finch. 



In looking over my records of the Tree Sparrow for three years, 

 I find that the species arrived irregularly in March. Two of the 

 dates are in the first part of the month — Mar. 6, 191 5; Mar. 11, 

 191 7. The other date was as late as the 31st of that month. The 

 Tree Sparrow is a winter species that is often absent for long periods, 

 and may thus be regarded as a true migrant. This sparrow usually 

 leaves us about the middle of April. Dates of departure for three 

 years are as follows: Apr. 15, 1915; Apr. 9, 1916; Apr. 19, 1917. 



The spring arrival of the Brown Thrasher is very interesting. 

 Previous study of the species has shown that it comes with remark- 

 able regularity between the 10th and 17th of April — the records of 

 eight years being conclusive proof of this statement. But the 

 present year was quite exceptional to all others, for the Brown 

 Thrasher was recorded for the first time in March — on the 31st. 

 Curiously enough the next time the species was observed was on 

 April 13, and for three years this was the date of arrival. 



The migratory records of the White-throated Sparrow for four 

 years show usual regularity. Only in one year, 1916, was there a 

 notable difference from the dates of the other years. In that spring 

 the species arrived on April 16 and departed on May 12, both of 

 which dates were the earliest in four years. In the other years the 

 time of arrival was between the 20th and 28th of April; the time 

 of departure, between the 22nd. and 25th of May. 



In four years the spring migration of the Spotted Sandpiper 

 was very regular. In 191 5 and 19 17, the date was identical — April 

 21. In 1914 this sandpiper arrived on April 25; in 19 16, on April 

 19, which was the earliest record made in six years. 



For three years, 1914-1916, the Baltimore Oriole arrived with 

 great regularity. All the dates of migration were between the 24th. 

 and 30th of April. In 191 7 this species arrived on May 10, which 

 is the latest migratory record I have ever made for the Baltimore 

 Oriole. During the latter part of April and the first days of May 

 this year, which were unusually cool, there was a notable absence 

 of migrants. 



Usually the first, and occasionally the second, week in May is 



