NATURAL SCIENCES OP PHILADELPHIA. 19 



the locality at large, seemed to promise the more of real interest. 

 At the same time it should be remembered, that any of the Fas- 

 seres, &c., of the wooded main land adjoining, not here noted, 

 may occasionally stray into the shrubbery of the sand-bars. The 

 catalogue of the water birds is believed to be pretty full. Aside 

 from these, and excepting a few maritime land birds like the Am- 

 modrami for example, the bird-fauna of the locality appears to 

 differ from that of the State at large, mainly in the absence during 

 the breeding season of species that, like the robin and meadow- 

 lark, pass the summer as well as other seasons in higher parts, 

 and perhaps, also, in a rather earlier arrival in spring, and later 

 departure in the fall, on an average, of the migrants. 



Turdus migratorius. 



Spring and fall, especially March and Xovember ; some winter ; 

 none observed in summer. 



Turdus pallasii. 



Spring and fall, occasional, in the shrubbery; spec, in Xov. 

 As elsewhere* noted, this species migrates earlier in the spring 

 and later in the fall than its nearest allies ; and I have no doubt 

 that it winters in this vicinity. 



Turdus alicise. 



Like the last, but later in coming ; specs, in April and Ma}^ 



Mimus polyglottus. 



Resident ; common ; but not so abundant as it is inland, and 

 especially somewhat further south. 



Mimus carolinensis. 



Resident; common; but most numerous during the migration. 



Anthus ludovicianus. 



Abundant, in flocks, from early in Xovember till April. 



Thryotliorus ludovicianus. 



Common ; resident ; mates in March ; nests and lays in April ; 

 young obtained May S. 



Telmatodytes palustris. 



Abundant, particularly during the migration. It continues in 

 plenty through part of Xovember at least, and I think that some 



' Coues and Prentiss, Smithsonian Report for 1861, p. 404 

 1871.] 



