134 BIRDS OF MAINE. 



HYPOTHETICAL LIST. 



I have consigned to this list such species as probably occur in 

 the state, but whose occurrence has not been proved by the actual 

 capture of specimens within our limits. Here also are men- 

 tioned birds recorded from Maine or New England by previous 

 authors, but which are now positively known not to have been 

 taken within the actual limits of the state, although many have 

 been taken very near our boundaries. Under each species its 

 status or probable status will be found outlined in as comprehen- 

 sive a manner as the information at my disposal will allow. Many 

 birds taken at Grand Men an and other islands of that vicinity, 

 which are politically a part of New Brunswick, have been given as 

 Maine birds by previous writers on the subject. Such will be 

 found discussed here to a greater or lesser extent. 



Family URINATORID^E. Loons. 

 Genus URINATOR Cuvier. 



1. (9). Urinator arcticus (Linn.). Black-throated Loon. 



This species is given in the A. O. U. Check List of North Amer- 

 ican Birds as being of casual occurrence in autumn and winter in 

 the northern United States, east of the Rocky Mountains. In 

 Smith's List of the Birds of Maine this species is given, but its 

 occurrence does not seem to be satisfactorily shown. There is no 

 doubt but what it will probably be added to our list upon the best 

 of evidence before many years have gone by. 



Family ALCID^E. Auks, Murres, and Puffins. 

 Genus CEPPHUS Pallas. 



2. (28). Cepphus mandtii (Licht.). Mandt's Guillemot. 



The A. O. U. Check List gives this species as being found along 

 the Atlantic coast, in winter as far south as Massachusetts. In 

 view of this fact it is highly probable that it will ultimately be 

 found to be a fairly regular winter visitant to our coast. On 

 account of the resemblance of this species to the Black Guillemot 

 it would easily pass unrecognized except by Ornithologists. 



