REPORT UPON ORNITHOLOGICAL SPECIMENS. 



61 



ings of the young males, which appeared to be practicing for the full 

 concerts that follow later. Both sexes were molting and in curiously- 

 pied plumage. 



28. Passerculus savanna, (Wils.), var. alaudlnus, Bp. Savannah Sparrow. 

 Common the 1st of May, and noted in increasing numbers till the 

 12th, when they were exceedingly numerous around the small ponds and 

 marshy spots. 



29. Pocecetes gramineus, (Gin.), var. confinis, Bd. Grass-Finch ; Bay- 

 winged Bunting. 



Common and in full song on my first arrival. The song does not 

 differ from that of its eastern representative, from which the present 

 variety is distinguished by its paler colors and somewhat slenderer bill. 



30. Chondestes grammaca, (Say). Lark-Finch. 



Very common in small companies along the banks of the Platte. 

 During the vernal season its beautiful warbling song is hardly excelled 

 by any other species. 



31. Zonotrichia leucoplirys, (Forst.) White-crowned Sparrow. 



Quite common in small flocks from the 7th till the 20th. Dr. Roth- 

 rock found it breeding in the South Park in July. 



