86 The Ornithology of Chester County 



bellied swallow." Not common transient, and pos- 

 sibly a rare summer resident. Michener, Warren 

 and Pennock considered it common, but Mont- 

 gomery found it unfrequent, taking two specimens 

 and observed two others on Apr. 25, 1891, by the 

 Brandywine, and saw another three days later in 

 West Goshen. 



Dr. Warren informed me that he had observed 

 several along the Brandywine, several times during 

 the summer of 1889. Arrives Apr. 17 (1914) — 

 Apr. 25 (1891). 



172. Riparia riparia Bank Swallow, "sand swal- 

 low." Not common transient. Apr. 25 to May 2, 

 according to Barnard. Although this species has 

 been known to breed in large colonies in the adjoin- 

 ing counties, and there are numerous local reports 

 of its presence and nesting; I have been unable to 

 confirm a single one with specimens, and neither 

 Stone nor Montgomery round it nesting. However, 

 if we are to credit the statements of Audubon, 

 Michener and others, it was formerly a common 

 summer resident along the Schuylkill, Brandywine, 

 and other parts of the county ; now apparently large- 

 ly or altogether displaced by S. serripennis. 



173. Stelffidopteryx serripennis Rough-winged 

 Swallow, "bank swallow," "bridge swallow," "sand 

 martin," "sand swallow." Common summer resi- 

 dent, especially along the Schuylkill and Brandy- 

 wine. Nesting data: Chester valley, June 3, 1895, 

 five eggs. Migration data from all sources: 



Arrival — ^Apr. 18 (1908) — May 13 (1909); 

 ave. 7 yrs. Apr. 30. 



