OF ARTS AND SCIENCES. 1 19 



others with squeaks and twitters engaged in mock combat, 

 while yet others rest momentarily on some dead twigs near by. 

 After these flowers are through blossoming, by about Septem- 

 ber 10, most of the hummingbirds depart, though I have seen 

 a few belated individuals at Intervale so late as the iQth of the 

 month, hovering over the nasturtiums. 

 Dates : May 13.10 September 19. 



141. Tyrannus tyraiiims (Linn.). KINGBIRD.. 



A fairly common summer resident of the Transition valleys and 

 up to about 1,500 feet in the White Mountains. It is a charac- 

 teristic orchard bird and is seldom found at any distance from the 

 apple trees during the breeding season. After the young leave 

 the nest the entire family is usually found to remain about their 

 nesting ground in a small flock for the remainder of the season. 

 By the last of August these family parties migrate southward, and 

 joining one to another, soon form a flock of 20 to 30 birds. The 

 attachment of these flycatchers to a chosen site is strong, and I 

 know of a pair at Intervale which has nested for five consecu- 

 tive summers in the same apple tree which projects out over a 

 small pond on the Saco meadows. I have seen on these mead- 

 ows what I presume to be birds which had summered close by, 

 so late as September 8, 1898, but most of them have left by the 

 first of that month. 



Dates : May 3 to September 8. 



142. Myiarchus crinitus (Linn.). CRESTED FLYCATCH- 

 ER. 



An uncommon summer resident of the Transition and sub-Can- 

 adian woodlands, occurring in the White Mountains as high up 

 at least as 1,500 feet. About Intervale, I have found it in fair 

 numbers through June, but after that month the birds become 

 retiring and their noisy calls infrequent, so that a c ireful search 

 is necessary to discover them at all. They remain in these 

 northern valleys until September. 

 Dates : May 13 to September. 



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