1272 U.S. NATIONAL MUSEUM BULLETIN 237 fart 3 



and Polk counties) south to southern California (Encinitas; San 

 Clemen te Island), southern Nevada (mouth of El Dorado Canyon), 

 southwestern Arizona (Tucson), south central Texas (Del Rio; 

 Bee County), northwestern Louisiana (Shreveport) , northwestern Mis- 

 sissippi (Hernando), and Tennessee (Memphis, Nashville); casually 

 north to northwestern Montana (Libby), southeastern North Dakota 

 (Fargo), Wisconsin (Polk and Shawano counties), southern Ontario 

 (Neebing Township, Peterborough, Hamilton, Toronto), Michigan 

 (Sault Ste. Marie, Midland), and Massachusetts (Greenfield, Warren, 

 Bradford, Boxford, and Edgartown) ; and east to Pennsylvania (Bucks 

 County), Maryland (Darnes town), Virginia (Ashburn), South Carolina 

 (Granting), Georgia (Atlanta) , and Florida (Winter Park, Melbourne 

 Beach). 



Casual records. — Casual in migration north to south central Alaska 

 (Cohoe), northern Alaska (Nikilik on Colville River delta), northern 

 Mackenize (Bathurst Inlet), and New York (Ithaca, New York City, 

 Fire Island), east to Massachusetts (Martha's Vineyard), Connecticut 

 (Glastonbury), New Jersey (Troy Meadows), Maryland (Howard 

 Count}^), and south to Georgia (Athens), Florida (Leon and Brevard 

 counties) , Alabama (Birmingham) and Mississippi (Gulfport, Rosedale) . 



Migration. — Early dates of spring arrival are: Illinois — Chicago, 

 May 3 (average of 8 years, May 12). Ohio — central Ohio, April 1. 

 Iowa — Sioux City, average of 17 years, March 29. Minnesota — 

 Minneapolis-St. Paul, April 27 (average of 7 years, May 7). 

 Nebraska — Lincoln, average of 20 years, March 14. South Dakota — 

 Sioux Falls, March 26 (average of 7 years, April 30). North 

 Dakota — Jamestown, March 5; Cass County, April 27 (average, 

 May 6). Manitoba — Treesbank, May 3 (average of 25 years, May 8). 

 Wyoming — Torrington, April 19. Idaho — Lewis ton, April 4. 



Late dates of spring departure are: Tennessee — Nashville, April 11. 

 Missouri — St. Louis, May 8 (median of 6 years, May 5). Illinois — 

 Chicago, May 29 (average of 8 years, May 15). Ohio — central 

 Ohio, May 14. Iowa — Sioux City, May 26 (average of 38 years, 

 May 15); Winnebago, May 12. Wisconsin — northern counties, 

 May 18. Minnesota — Minneapolis-St. Paul, May 24 (average of 

 5 years, May 20). Kansas — northeastern Kansas, May 19 (median 

 of 19 years, May 10). Nebraska — Fairbury, June 4; Lincoln, average 

 of 20 years, May 14. South Dakota — Sioux Falls, May 24 (average 

 of 5 years, May 19). North Dakota — Cass County, May 29 (average, 

 May 27); Jamestown, May 18. Wyoming — Torrington, May 14. 

 Idaho — Potlatch, April 19. 



Early dates of fall arrival are: Montana — Medicine Lake, Sep- 

 tember 30. Wyoming — Douglas, October 7. Saskatchewan — Saska- 



