North-American Birds crossing the Atlantic. 23 



Of land birds there are 120 occurrences belonging to thirty-one 

 species. Of these one occurred in Iceland ; and thirty-three 

 including fifteen species, only in the British Isles. Fifteen 

 belonging to seven species have been found in Ireland, of which 

 Ceryle alcyon has occurred nowhere else in Europe, Coccyzus 

 erythrophthalr)ius only in Ireland and Italy, and Astur palum- 

 ba7%us Var. atricapillus only in Ireland and Scotland. 



Twenty-seven occurrences, of ten species are recorded from 

 Scotland, of which Buteo lineatus has not occurred elsewhere in 

 Europe. 



England is credited with fifty-three cases belonging to eighteen 

 species, of which twelve including seven species, have occurred 

 nowhere else in Europe, and Turdus migratorius has been found 

 only in England in the British Isles, although it has also occurred 

 on the continent of Europe. Progne subis is recorded only from 

 England and Ireland, and Regulus calendula, Zonotrichia al- 

 hicollis, Surnia ulula Var. hudsonica and Nauclerus furcatus 

 only in England and Scotland. 



Nine instances belonging to eight species have occurred in the 

 small island of Heligoland, and of these Harporhynchus rufus, 

 Qaleoscoptes carolinensis,Anthu8 ludovicianus,Dendroica virens 

 and Charadrius virginicus have occurred nowhere else in 

 Europe. 



We have records also from Spitzbergen, Sweden, Germany, 

 Pomerania, Austria, Belgium, Switzerland, and Italy. 



Of those occurrences where I have been able to ascertain the 

 monthly date, eight have taken place in February ; six in March ; 

 eight in April ; four in May ; four in June ; one in July ; two in 

 August ; five in September ; eleven in October ; five in November ; 

 and nine in December. Thus in the six months from October to 

 March inclusive, thirty -nine out of sixty-three, or nearly sixty- 

 two per cent, of all the occurrences have taken place; besides 

 which there are five marked spring ; two summer ; ten autumn, 

 and one winter. For the spring (March, April, and May) twenty- 

 three cases, as compared with thirty-one for the autumn months 

 (September, October, and November). 



Of wading birds 125 instances are recorded, comprising sixteen 

 species. One Numenius hudsonicus has occurred in Iceland. 

 In Ireland we find twelve occurrences, including six species, of 



