14 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I45 



Family TURDIDAE: Thrushes, Bluebirds 



Tiirdus migraforius Linnaeus : Robin. 



One or more : A premaxilla ; a complete right humerus, and one 

 from the left side with the head missing. The wing bones are of 

 maximum size for this species. 



The only other ancient record for the robin is from the late Pleisto- 

 cene of California. 

 Hylocichla sp. : Thrush. 



One: A left humerus complete. This comes from one of the 

 smaller species of this group. It is not the wood thrush, which is 

 larger, but except for this, it is not practicable to indicate relationship, 

 since the related species may not be separated from one another on 

 the basis of this single bone. 



Family ICTERIDAE: Meadowlarks, Blackbirds, Orioles 



Agelaius phocniceus (Linnaeus) : Red-winged Blackbird. 



Two individuals: Right and left humeri with the heads broken. 

 These differ in size so that they come from two individuals. 



The species is known from the Pleistocene of Ontario and Florida. 

 Molothrus atcr (Boddaert) : Brown-headed Cowbird. 



One or more: Right and left humeri of such similar size that they 

 may be a pair. 



This is the first ancient record for the species. 



Family FRINGILLIDAE: Grosbeaks, Finches, Sparrows, Buntings 



Junco sp. : Junco. 



One: A complete right humerus. 



While this agrees with the slate-colored junco it is not practicable 

 to make a specific identification among the several species of siinilar 

 size in this genus. 

 Zonotrichia albicoUis (Gmelin) : White-throated Sparrow. 



One: A complete left humerus. 



This is the first ancient record for this species. 

 Passcrella iliaca (]\Ierrem) : Fox Sparrow. 



One: The symphysis of a lower mandible. This agrees in full 

 detail with modern skeletons. The form of the thickened inner margin 

 of the anterior end of the dentary, smooth and rounded when viewed 

 from above, and shelf like when seen from below, is characteristic of 

 this species. The bone is similar to that of the small-billed eastern 

 subspecies. 



