BIRDS OF NORTH AND MIDDLE AMERICA. 659 



00. Smaller (wing averaging less than 62, tail 5*5, tarsus less than 22); 

 gray of crown duller and more restricted. 

 /). Wing larger (averaging 61), bill larger (exposed culmen averaging 

 15.7); yellow of under parts duller, the back, etc., more grayish 

 olive-green. (Abaco Island, Bahamas.) 



Geothlypis incompta, adult male (p. 677) 

 /)/(. Wing shorter (59), bill smaller (exposed culmen 15); yellow of 

 under parts brighter, the back, etc., more decided olive-green. 

 (Andros Island, Bahamas.) 



Geothlypis exigua, adult male (p. 677) 

 ff. Post-facial band yellow (except across crown) or tinged with yellow; 

 back, etc., brighter olive-green; crown with gray more restricted or 

 else tinged with yellow or olive-green; yellow of under j)arts deeper 

 and brighter. 

 g. Band across crown gray, without yellow tinge; supra-auricular region 

 more faintly yellow. 

 h. Band across crown darker or duller gray; back darker olive-green; 

 yellow of under parts less intense; wing and tail longer ( wing 67.3, 

 tail 61). (Abaco island, Bahamas; Great Bahama island?) 



Geothlypis tanneri, adult male (p. 676) 



/(//. Band across forehead paler or purer gray; back more yellowish 



olive-green; yellow of under parts more intense; vving and tail 



shorter (wing averaging 64.8, tail 59.7). (New Providence 



island, Bahamas.) Geothlypis maynardi, adult male (p. 676) 



gg. Band across crown yellowish gray; supra-auricular region clear 

 yellow. 

 hh. Smaller, with larger bill (wing averaging 62.5, tail 58.7, exposed 

 culmen 16.2); black of forehead narrower; back, etc., clearer 

 olive-green. (Eleuthera island, Bahamas. 



Geothlypis coryi, adult male (p. 677) 

 /(. Larger, with smaller bill (wing averaging 66. 1, tail 61.2, exposed 

 culmen 14.7); black of forehead broader, and color of back, etc., 

 more golden olive-green. (New Providence island, Bahamas.) 

 Geothlypis flavida, adult male (p. 678) 

 dd. Band across crown (immediately behind black frontal patch) clear yel- 

 low; feathers of crown and occiput yellowish beneath surface (crown 

 and occiput wholly yellow in one species. ) 

 e. Larger (wing and tail more than 61, tarsus 22.9 or more). (Cape St. 

 Lucas district, Lower California.) . Geothlypis beldingi, adult male (p.679) 

 ee. Smaller (wing less than 56, tail less than 55, tarsus less than 22). 

 /. Hinder crown, occiput, and hindneck brownish olive; bill smaller 

 (exposed culmen 12). (Southern Tamaulipas, eastern Mexico.) 



Geothlypis flavovelata, adult male (p. 680) 

 ff. Whole crown and occiput yellow; bill larger (exposed culmen 14). 

 (Southern Tamaulipas, eastern Mexico. ) 



Geothlypis flaviceps, adult male (p. 680) 

 ;. No gray, white, nor yellow behind the black "mask;" outermost (ninth) 



primary not longer than first (except in G. chiriquensisf^) 

 d. Black of forehead not extending to crown; crown and occiput gray. (Chi- 



riqui. ) Geothlypis chiriquensis, adult male ( p. 681 ) 



dd. Black of forehead extending at least to middle of crown; hinder crown 

 and occiput olive-green or black. 



^ This species I have not been able to examine. 



