140 Harlow, Breeding Birds of Penna. and N. J. [April 



distributed. Data on thirty-seven nests give: average set, 4 (sometimes 

 3); average date, June 4 (May 28- August 15). 



108. Piranga erythromelas. Scarlet Tanager. — Regular but 

 rather scarce breeder in southeastern Pennsylvania and southern New 

 Jersey but much more common in the northern and mountainous portions 

 and in southwestern Pennsylvania. Data on fourteen nests give: aver- 

 age set, 3-4 (rarely 5); average date, June 3 (May 26-August 14). 



109. Progne subis subis. Purple Martin. — Common summer 

 resident in Cape May, Cumberland, Atlantic, and Burlington Counties, 

 New Jersey. Very local in eastern Pennsylvania where I have found it 

 nesting in Chester and Monroe Counties. A common breeder in Greene 

 County in the southwestern corner. Absent from the northern counties. 

 Data on eleven nests give: average set, 5 (4-6); average date, June 2. 



110. Petrochelidon lunifrons lunifrons. Cliff Swallow. — Nests 

 abundantly in the northern half of Pennsylvania and locally in the southern 

 counties. I have not found it in southern New Jersey. Data on sixty-two 

 nests give: average set, 4 (3-5); average date, June 4 (May 26- July 2). 



111. Hirundo erythrogastra. Barn Swallow. — Very common 

 summer resident in most of the area but rather scarce in the Philadelphia 

 region. Data on seventy-five nests give: average set, 5 (3-6); average 

 date, May 30 (May 12- July 7). 



112. Iridoprocne bicolor. Tree Swallow. — Breeds commonly in 

 Cape May, Cumberland and Atlantic Counties, New Jersey. In Penn- 

 sylvania I have found them only about a few ponds in Pike and Monroe 

 Counties and on a pond at Scotia, Center County. Data on nine nests 

 give: average set 5 (4-6); average date, May 28 (May 19- June 16). 



113. Riparia riparia. Bank Swallow. — Very common summer 

 resident in the Delaware Valley in both states and along the Susquehanna 

 Valley in Pennsylvania. I have not found it elsewhere. Data on forty- 

 five nests give: average set, 5 (4r-6); average date, May 20 (May 14- 

 June 18). 



114. Stelgidopteryx serripennis. Roughed- Winged Swallow. — 

 Nests commonly in Camden and Burlington Counties, New Jersey; I have 

 also found its nest once in the pine barrens in Gloucester County and once 

 in a sand dune in Cape May County. In Pennsylvania it breeds regularly 

 in the southern half of the state pushing up the river valleys rarely to 

 Stroudsburg, Monroe County, but commonly to Center County, and has 

 even been found breeding at Warren, Warren County. Data on eighteen 

 nests give: average set, 6 or 7 (5); average date, May 20 for southern 

 Pennsylvania and New Jersey; May 27 for northern Pennsylvania. 



115. Bombycilla cedrorum. Cedar Waxwing. — I have never 

 found the Waxwing breeding in southern New Jersey. In Pennsylvania 

 it is fairly distributed but only common in the northern counties. Data 

 on fourteen nests give: average set, 4 (5); average date, June 25 (June 5- 

 August 19). 



116. Lanius ludovicianus migrans. Migrant Shrike. — A regular 



