THE GENUS CHOKDEILES SWAINSON OBEEHOLSEK, 



81 



white and. to grayish white with but little or no buffy tinge. The 

 posterior lower parts of both sexes and the light throat-patch of the 

 female vary from cream buff or buffy white to ochraceous buff. 



No satisfactory division of this race is possible, at least with the 

 material at jDresent available. Birds from Andros, Great Bahama, 

 and other islands appear to be slightly darker above than those from 

 Eleuthera Island, but this may be due to the unevenness of the series. 

 Differences in size, as may be noted from the table of detailed meas- 

 urements, are equally difficult to correlate with any geographic areas. 



This well-characterized race seems to be only a summer resident 

 in the Bahama Islands, from which it disappears in the autumn, but 

 there is no direct clue to its winter home. It probably, however, 

 winters in South America along with the other forms of the species. 

 It is known to breed in July, and probably does so also during May 

 and June. 



Specimens examined. — Of this race we have seen altogether 20 

 examples, from the localities in the Bahama Islands listed below : 



Andros Island. — Wide Opening (June 17, 1890) ; Grassy Creek 

 (June 28, 1903). 



Eleuthera Island. — Governor's Harbor (July 4 and 7, 1903). 



Great Bahama Island. — (July 17, 1904.) 



Long Island.— {July 16 and 17, 1903.) 



Moraine Cay. — (July 12 and 13, 1904.) 



New Providence Island. — Nassau (May 13, 1897; May 21, 1902.) 



Southern Andros Island. — (May 19, 1904.) 



Stranger Cay. — (July 8 and 15, 1904.) 



Sugar Loaf Cay. — (July 14, 1904.) 



Measurements of specimens of Chordeiles virginianus vicinus. 



1 Used in measurement averages on p. 

 ' Type; original number, 183. 



