BIRDS OF NORTH AND MIDDLE AMERICA. 659 



gg. Smaller (wing averaging less than 62, tail 56, tarsus less than 22); 

 gray of crown duller and more restricted. 

 h. 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) 

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

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

 (Andros Island, Bahamas.) 



Geothlypis exigna, 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 parts deeper 

 and brighter. 

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

 more faintly yellow. 

 /(. 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 tanueri, adult male (p. 676) 



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



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



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



island, Bahamas.) Geothlypis mayuardi, 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) 

 h. 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 Tamauhpas, eastern Mexico.) 



Geothlypis flavovelata, adult male (p. 680) 

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

 (Southern Tamaulipas, eastern Mexico. ) 



Geothlypis flavioeps, adult male (p. 680) 

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



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

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



riqui.) Geothlypis ohiriquensis, 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. 



