236 BULLETIN 2 03, UNITED STATES NATIONAL MUSEUM 



Early dates of fall arrival are: Wisconsin — ^New London, August 



23. Michigan — Grand Rapids, August 26. Ohio — Toledo, August 



24. Illinois — La Grange, August 24. District of Columbia — Wash- 

 ington, August 21. Virginia — Charlottesville, September 12. North 

 Carolina — Mount Mitchell, September 1. South Carolina — Mount 

 Pleasant, August 30. Georgia — Savannah, August 28. Florida — 

 Coconut Grove, August 29. Cuba — Cienfuegos, September 2. Do- 

 minican Republic — El Rio, October 5. Puerto Rico — Las Marias, 

 October 12. 



Casual records. — On the Farallon Islands, Calif., a specimen was 

 found dead on November 17, 1886; it had been previously observed 

 for three weeks. In New Mexico a specimen was taken at Gallinas 

 Mountain on October 8, 1904, and on October 9, 1938 another was 

 collected in Milk Ranch Canyon near Fort Wingate. In Bermuda 

 a specimen was collected October 2, 1902 ; and it is considered a rare 

 winter visitor. An individual spending the winter at a feeding stand 

 in the suburbs of Washington, D. C, was observed closely from De- 

 cember 22, 1930, to January 16, 1931. 



At sea the black-throated blue warbler has been observed on October 

 27, 1921, 12 hours run out from Port-au-Prince, Haiti, toward New 

 York; and on March 29, 1918, in the Gulf of Mexico, 125 miles from 

 Sabine Pass, La. 



Destruction at lighthouses. — Lighthouses with fixed white lights 

 have caused considerable destruction of bird life during migration 

 and the black-throated blue warbler seems to have been especially 

 lured to those in southern Florida. Records were received from sev- 

 eral of these lighthouses over a period of 5 or 6 years. Those from 

 Sombrero Key are most detailed and give an interesting picture of 

 migration at that point, since they include date, weather conditions, 

 number of birds that struck, number killed, and hours during which 

 the birds struck the light. 



Comparatively fewer birds struck the light in spring than in fall. 

 The spring dates are from March 9 to May 29 ; but in 4 years birds are 

 reported to have struck the light only on 24 nights and 4 individuals 

 is the greatest number reported. 



In the fall, the records extend from September 3 to December 

 5, the heaviest nights being from the middle of September to late 

 October. In two different years birds struck the light on 19 nights in 

 two months. The greatest number in one night was 400 with 56 killed. 

 In one of those years 1146 birds struck the light; of these 193 were 

 killed. It was not only on stormy nights that the birds were attracted, 

 as 130 struck and 15 were killed on a night described as calm and dark. 

 Sometimes they kept striking all night, but on others the flight seems 

 to have been concentrated, as when 300 birds struck in 3^^ hours. On a 



