180 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



GYMNOSTINOPS MONTEZUMA (Lesson). 

 MONTEZUMA OROFENSOLA. 



Adult ///a/t'.— Head, neck, and upper part of chest unifonii l)lack; 

 tail rich lemon yellow, the middle pair of rectrices brownish black; 

 rest of pluinao-e rich purplish chestnut, or ])ay, darker on under parts 

 of the body, especially the thighs, the feathers of breast and abdomen 

 being black beneath the surface; tips of longer primaries (beyond 

 emarginations) and whole under surface of wings ])rowniish l)lack; 

 basal half, or more, of bill l)lack, the terminal portion yellowish (more or 

 less orange or orange-red in life); naked skin around ])ase of culmen 

 and bare suborbital and malar spaces flesh color, pale l>luish, or rose- 

 pink in life; iris brown; legs and feet l)lack; length (skins), 450.0- 

 520.7 (491); wing. 245.1-278.1 (2d0.1)); tail, 185.9-205.2 (197.4); cul- 

 men, 73.7-78.7 (77); greatest width of culmen near l)ase, 13.7-10.3 

 (14.7); tarsus, 54.6-0O.2 (56.0); middle toe, 39.9-44.5 (42.4).' 



Adult female. — Similar to the adult male, but much smaller; black 

 of head and neck duller or browner; middle rectrices blackish brown, 

 instead of black, and the median under parts and thighs darker, some- 

 times approaching brownish black; length (skins), 368.2^06.4 (381.3); 

 wing, 188-205.7 (196.3); tail, 144.8-159.5 (152.4); culmen, 56.4-61 

 (58.9); width of culmen near base, 10.2-12.4 (11.2); tarsus, 44.5-46.2 

 (45.2); middle toe, 31.2-33.5 (32.5).- 



Y<>u)ig. — Similar to adults, but dark portion of bill not so deep ])lack 

 and pale terminal portion less distinctl}- 3^ellowish; the line of demar- 

 cation between the two areas less distinct. 



Southeastern Mexico, in States of Tamaulipas (Alta Mira) and Vera 

 Cruz (Santa IVIaria, Orizaba, Cordova, flalapa, Actopam, Barra de 

 Santa Ana, Paso de la Milpa, etc.), south through Central America to 

 Isthmus of Panama (Lion Hill Station, Panama Railroad). 



^ Seven .speciment-. 



'-' Five specimens. 



Specimens from different localities average as follows: 



