PYGOPODES. 25 
common anywhere, but individuals are to be found during 
the spring and fall months, on almost any body of water a 
half acre in extent. 
Lorain county dates for spring appearance fall within the 
last week of March, and the departures during the second 
week in October. 
SUBORDER CEPPHI. Loons, Auks, Murres etc. 
Family Gaviipa&. Loons. 
Three species belonging to this family inhabit Ohio more 
or less regularly. Only one species, the Loon, is regular in 
its appearance, the other two reach the state only in severe 
winters. The food is similar to that of the Grebes, with a 
larger proportion of fish, probably, and somewhat less of 
vegetable matter. 
4. (%.) GAVIA IMBER (Gunn.). 290. 
Loon. 
Synonyms: Colymbus torquatus, C. imber, C. glacialis, Urina- 
tor imber. 
Great Northern Diver, Common Loon. 
Kirtland, Ohio Geol. Sury., 1838, 166, 186. 
The Loon is no longer a common bird anywhere in the 
state, but it is not infrequently seen during the m‘grations 
on the larger waters. It is apparently a rare summer resi- 
dent in the region of Sandusky and Toledo, and possibly 
elsewhere along the lake shore. 
At Oberlin it has been seen in late April and early Oc- 
tober, but no definite dates of migration can be given. Rev. 
Mr. Henninger has found it as ‘ate as the first of May at 
Piketon. 
5. (9:) GAviIA arctica (Linn), 291. 
BLACK-THROATED LOON. 
Synonyms: Colymbus arcticus, Urinator arcticus. 
Black-throated Diver. 
Wheaton, Ohio Geol. Surv., 1882, 565. 
