246 TRANSACTIONS OF THE [1895 
it goes westward. The country north and south of this valley 
is very uneven and high (560 feet in some places). 
Messrs. G. H. Gray and P. T. Blogg, working to the west of 
the city, have quite a different country, most of their observations 
being made in the rocky, heavily timbered gorge of Gwynn’s 
Falls, between Calverton and Powhattan. The bed of the falls 
at Calverton has an elevation of 80 feet, and at Powhatan dam 
of 320 feet, the country on both sides ranging from 300 to 
500 feet. 
Mr. A. Resler takes another field, collecting a good deal on 
Patapsco marsh, just south of the city, also “down the necks,” 
and near Botterill Post-Office, in Howard County, 14 miles 
from Baltimore. 
Order PYGOPODES—Divine Brrps. 
Family Popicrepin2—Grebes. 
Colymbus holbeellii (2). Holbcell’s Grebe. 
“Not uncommon on the Potomac in winter” (A. C., 110), 
this species has been taken in Lancaster County, Pa., and at 
other points in Pennsylvania and New Jersey (Birds E. Pa. 
and N. J., 38), so I presume it occurs all over tide water 
Maryland. On February 25, 1894, I watched one for about an 
hour at Lake Roland where it was swimming around in a hole 
in the ice, which otherwise covered the lake. Later, when we 
threw stones at it, it would neither fly nor dive, so we left it. 
Colymbus auritus (3). Horned Grebe. 
~ Fairly common in tide-water Maryland during migrations, 
a number winter with us. Noted from October 7 (’76, Resler) 
at Back River, to April 23 (’90, Resler), at the same place, 
April 25, at Washington, D. C. (Richmond). Inland, a young 
male, shot at New Market, Carroll County, by Dr. H. H. Hop- 
kins, was presented in the flesh on February 21, ’81, to the 
Maryland Academy of Sciences. A pair, male and female, 
were taken at Hagerstown on April 16, ’83 (Small), and Mr. 
Robert Shriver has secured specimens at Cumberland. 
