^^1915'^] BANGS — AMERICAN GALLINULE 95 



There is a slight sexual difference in size, the male usually being 

 a little the larger. Among skins from any one place, with the sex 

 known to be properly determined, the difference in wing-length of 

 males and females is sometimes not more then three or four mini- 

 meters; in other instances it is as great as eleven millimeters. 



In the following short account of the five subspecies into which 

 at least I consider that the American gallinule certainly can be 

 separated, colors, measurements, etc., are taken from fully adult 

 specimens only. Names of colors are according to Ridgway's 

 'Color Standards and Nomenclature,' 1912 edition, and all meas- 

 urements are in millimeters. 



Gallinula chloropus galeata (Lichtenstein) . 



Type locality. — San Paulo, Brazil. 



Range. — Southern Brazil, Paraguaj^ Uruguay and northern Argentina. 



Characters.— Size moderate (size and proportions about as in the North 

 American subspecies G. c. cachinnans) . 



General color, 'dark plumbeous'; back and wings with very slight 

 suffusion of browni-sh, which is 'deep olive' or dull 'olive brown' instead of 

 'argus brown,' 'Brussels brown,' or 'raw uml)cr,' as in cachiniiana; the 

 olive brown suffusion confined to longer tertials, rump and, very narrowly, 

 to the interscapular region. 



MEASiniEMENTs (in millimeters). 



Bill to 

 No. Sex Ivocallty Wing Tail Tarsus gape 



31,189 9 Concepcion del Uruguay 172 7G .50 30 



7,345 ? Lagoa Santa, MinasGeracs, Brazil 174 70 48 29 



Bcmarks. — The only two fully adult skins of this form in the 

 Museum of Comparative Zoology differ remarka1)ly from all adult 

 specimens from North America by their lower backs, rumps and 

 wings being much paler, and more plumbeous and olivaceous, less 

 brown, so that the form appears to be easily distinguished. 



