372 



BULLETIN OF THE 



Table II. (Continued.) 



Species. 



Colaptes auratuB 

 Conurus carollnensis 



Ortyx rirginianus . 

 Sterna hirundo . . 



Locality. 



Massachusetts 

 Florida . . . 



Illinois . . . 

 Florida . . 

 Illinois . . 

 Florida . . . 

 Massachusetts 



Min. 

 Max. 

 Min. 

 Max. 

 Min. 

 Max. 

 Min. 

 Max. 

 Min. 

 Max. 

 Min. 

 Max. 

 Min. 

 Max. 

 Min. 

 Max. 

 Min. 

 Max 



III. Table showing the Geographical Variation in Si2e in Seven 

 Species of American Birds, between Specimens from Florida and 

 the Northern States. 



Species. 



Pipilo erythrophthalmus 

 Agelseus phceniceus 



Sturnella ludoviciana 



Quiscalus purpureus . . 



Cyanura cristata . . . 

 Colaptes auratus . . . 



Ortyx virginianus . . 



Locality. 



Southern New England 



Florida 



Southern New England 

 South Carolina & Florida 

 Northern States . . 



Florida 



Northern States . . 



Florida 



Northern States . . 



Florida 



Northern States . . 



Florida 



Massachusetts . . . 

 Florida .... 



Massachusetts . . . 



Florida 



Illinois . . . . 



Florida 



Illinois . . . 

 Florida 



8.19 

 788 

 9.16 

 9 02 



10 43 

 9.81 

 9.55 

 8 96 



10.43 

 9.81 

 9.55 



8 96 

 11.71 

 10.98 

 1245 

 1166 

 10 18 



9 46 

 9 83 

 9.37 



1132 



9.88 



14 71 

 1441 

 16.30 



15 70 

 1443 

 14.09 

 1630 

 15 70 

 1443 



14 09 

 16.87 

 15.11 

 19 94 

 18.82 



15 44 

 14 16 

 15.10 

 14.02 



In the tables and remarks contained in the preceding pages many 

 facts have been given bearing upon the subject of geographical varia- 

 tion in birds, and especially in reference to the differences that al- 

 most universally obtain between specimens of the same species from 

 northern and southern localities. In addition to the smaller size of the 

 southern specimens, — a fact which has been for some time quite gen- 

 erally recognized, — attention has been called to the differences in color 

 and in the form of the bill that seem almost equally constant and easy 

 of recognition. In several species that range in the breeding season 



