WARIUJ'.R S()X(iS. 51 



Red-faced Warbler. Cardinclla nibrifons. 690. 



Southern Arizona and southwestern New Mexico, thru 

 Mexico to Guatemala. 



Red Warbler. E)Q;aticus ruber. [691.] 

 Hij^hlands of Mexico. Texas ( Giraud). 



Brasher 's Warbler. HasUeiiterus cidicivorus. [692.] 



Central America, from Panama north to Eastern Mexico. 

 Texas ( Giraud ;. 



Bell's Warbler. Basilcutcms belli. [f)<.);i] 



Guatemala and Mexico, north to the temperate regions of 

 Vera Cruz. Texas (Giraud ). 



CONCLUSION 



It is painfully apparent, from the foregoing discussion, 

 that the subject is far from exhausted. We have hardly more 

 than scraped the rind of it yet. We need first of all to learn 

 the songs of the remaining species and sub-species. We need 

 to devise some more perfect method of representing the songs 

 which will admit of more fruitful comparisons than those now 

 in use make possible. We need to follow the whole course of 

 the migrating birds in order to learn what the variations are, 

 where there are any, in the course of the journey northward ; 

 and if the breeding song differs from the migrating songs, 

 what the difference is and why. We know so little about the 

 second, or autumn, song period, that it is necessary to study it 

 from the beginning with most species. We know that the fe- 

 males of some species .sing, but under what circumstances and 

 what part of the whole song of the species is not known. 

 The.se are questions which can be answered by careful .study. 



There are other problems which belong more particularly 

 to the wider subject of bird song, but which a .study of War- 

 bler .songs will greatly help to solve. How far the sub-species 



