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 GAVIID^E. 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. (7.) GAVIA IMBER (Gunn.). 290. 



Loon. 



Synonyms: Colymbus torquatus, C. imber, C. glacialis, Urina- 



tor imber. 



Great Northern Diver, Common Loon. 

 Kirtland, Ohio Geol. Surv., 1838, 166, 186. 



The Loon is no longer a common bird anywhere in the 

 state, but it is not infrequently seen during the migrations 

 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 Ute as the first of May at 

 Piketon. 



5. (9.) GAVIA ARCTICA (Linn.). 291. 



BLACK-THROATED LOQN. 



Synonyms: CoJymbus arcticus, Urinator arcticus. 



Black-throated Diver. 

 Wheaton, Ohio Geol. Surv., 1882, 565. 



