BIRDS OF THE REPUBLIC OF PANAMA PART 4 



under surface pale buff, somewhat whiter on the throat; lower sides and 

 flanks barred narrowly with dull black; axillars and anterior under- 

 wing coverts dusky. 



A female of the nominate subspecies that I collected on the Rio 

 Paraguay in northern Paraguay, September 30, 1920, had the bill black 

 except for an elongate line of dull bluish gray around the base of the 

 gonys; iris yellow; tarsus and toes fuscous; concealed bare skin on 

 side of neck orange yellow. 



Measurements. — Males, (6 from Darien), wing 80.0-84.7 (83.0), 

 tail 96.2-100.9 (98.9), culmen from base 24.9-28.5 (26.2), tarsus 32.0- 

 34.6 (33.4) mm. 



Figure 7. — Black-capped Donacobius, Paralauta de Agua, Donacobius atri- 

 capillus brachypterus. 



Females (2 from Darien), wing 79.5-80.3 (79.9), tail 94.5-94.7 

 (94.6), culmen from base (one only) 23.2, tarsus 30.8-32.0 (31.4) mm. 



Resident. Recorded in Panama from El Real, Darien (specimens 

 in the American Museum of Natural History include 6 males and 1 

 female collected by Anthony and Richardson, January 1 to 8, 1915; 

 male and female taken December 13, 1928). 



This species ranges in suitable lowland habitat from eastern Panama, 

 northwestern Colombia, and most of South America, chiefly east of the 



