10 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult male.— Wing, 115-121 (118.3); tail, 40.5-43 (42.2); bill 

 from nostril, 17-18.5 (17.7); from posterior edge of frontal shield, 

 41.5-48 (43.8); tarsus, 52.5-55 (53.5); middle toe, 51.5-54 (52.5).« 



Adult female.— Wing, 128-131 (129.7); tail, 43-45.5 (44.5); bill 

 from nostril, 18-19 (18.7); from posterior edge of frontal shield, 

 43.5-47 (45.5); tarsus, 56-59 (57.2); middle toe, 54-55 (54.5).^^ 



Central America, from Guatemala (Humachal; Lake Peten; 

 Santa Ana de Mixtan; Lake Amatitlan) southward through British 

 Honduras (Belize River; Orange Walk), Honduras (Onioa; Truxillo; 

 Tigre Island; Lake Yojoa), Nicaragua (Grey town; Rio Escondido; 

 Lake Nicaragua; Momotombo; Omotepe, Sucuya) and Costa Rica 

 (La Raima de Nicoya; Las Trojas de Alajuela; Siquirres; Lake 

 Ochomongo; Salistral de San Antonio; Tenorio; Barranca de Punta 

 Ai'enas; Miravalles; mouth of Rio Matina) to western Panama 

 (Divala, Chu'iqui). 



a Three specimens. 



It is almost certain that some of tlie specimens measured have the sex wrongly 

 determined. (See Todd, Ann. Carnegie Mus., x, 1916, 217, 218.) 



