67 



America. This bird breeds in colonies and is of local distribution 

 during the breeding season. It was formerly not uncommon in 

 the vicinity of New York City but the English Sparrows have 

 taken possession of its nesting-houses and at present it is found in 

 but few places. 



269. Petrochelidon lunifrons (Say). CLIFF SWALLOW ; 

 EAVE SWALLOW. (612.) North America, north to Labrador and, 

 in the interior, to the Arctic Ocean, breeding throughout its range 

 and wintering in the tropics. Like most of the Swallows it nests 

 in colonies, and in this region generally places its mud nests 

 beneath the projecting eaves of a barn. It appears to be less 

 common during the summer than it was ten or more years ago, 

 but is a common migrant, particularly in the fall. According to 

 Dr. Mearns, it arrives as early as April 16. (See Group, main floor, 

 between Cases Q and R.) 



*27o. Chelidon erythrogaster (Bodd.}. BARN SWALLOW. 

 (613.) North America, north to Greenland and Alaska, breeding 

 throughout the greater part of its range, and wintering as far south 

 as southern Brazil. With us the Barn Swallow is a common sum- 

 mer and an abundant fall migrant. It arrives about April 20 and 

 remains until October i. 



*27i. Tachycineta bicolor (Vieill.). TREE SWALLOW. (614.) 

 North America, north to Labrador and Alaska, breeding locally 

 throughout its range, and wintering from South Carolina south- 

 ward. In this vicinity it arrives from the south early in April. 

 There are a few recorded instances of its breeding near New York 

 City but, generally speaking, the species passes onward to more 

 distant nesting grounds. July i they begin to return from the 

 north, making their home in the marshes of the Hackensack, 

 where, by. July 20, they may be found in countless numbers. In 

 the morning they leave their roosts in the 'cat-tails' and fly out 

 over the adjoining country to feed. At night they return. Their 

 numbers increase until about September i, then decrease, and by 

 October 20 only a few stragglers remain. 



*272. Clivicola riparia (Linn.). BANK SWALLOW. (616.) 

 North America, north to Labrador and Alaska, breeding locally 

 throughout its range, and wintering as far south as Brazil. It is 

 here a common summer resident, breeding in colonies where the 

 conditions are favorable. It arrives about May i and remains 

 until October. (See Group, main floor, between Cases R and S.) 



