FAMILY ANATIDAE I3I 



mens in the U. S. National Museum from the marshes near Pacora, 

 Panama, one taken on July 30, 1928, by J. A. Weber, and one 

 collected July 20, 1931, by Rex Benson. 



The species seems always to have been local in occurrence, since 

 it was not reported by early naturalists and collectors except as noted. 

 Karl Curtis informs me that in the early 1930's there was an in- 

 vasion of hundreds of these ducks in the La Jagua area and that they 

 nested there in cover of tall grass in the pastures, in company with 

 the black-bellied tree duck. Elsewhere they are reported as nesting in 

 hollow trees. The 8 to 12 eggs are described as yellowish or ivory 

 white, with a size range from 42 to 51 mm. long by 34 to 41 mm. 

 broad. In the records of the La Jagua Hunting Club, Herbert Clark 

 recorded 40 shot in 1940, 9 in 1941, 4 in 1942, and one in 1943, 

 an account that indicates their steady decline in number. None have 

 been seen in recent years. 



The species is known locally as the jacamillo, from the form of 

 the head markings that suggest a bridle. It has been recorded else- 

 where in Central America only in Guanacaste, Costa Rica (at 

 Bebedero). 



DENDROCYGNA BICOLOR BICOLOR (VieiUot) : Fulvous Tree Duck; 

 Yaguaso Colorado 



Anas bicolor Vieillot, Nouv. Diet. Hist. Nat., nouv. ed., vol. 5, Dec. 1816, p. 136. 

 (Paraguay.) 



Under surface plain cinnamon-brown; with prominent stripes of 

 buff and black on the elongated flank feathers. 



Description. — Length 460 to 480 mm. Head, upper neck, and 

 under surface cinnamon-brown, deeper in color on crown and sides ; 

 a black streak down hind neck, and a band of dull white, lined finely 

 with black, on the middle of foreneck; back, wings, and tail black, 

 the back barred broadly with cinnamon brown; lesser wing coverts 

 rufous brown ; upper tail coverts buff ; sides and flanks with promi- 

 nent, elongated feathers, each with a broad central stripe of buff, 

 bordered narrowly with black. 



Measurements. — Males (4 from Colombia and Argentina), wing 

 215-219(217), tail 49.0-58.0 (53.7), culmen from base 44.9-50.0 

 (47.6), tarsus 52.2-57.5 (55.3) mm. 



Females (3 from Argentina), wing 203-218 (208), tail 49.0-58.2 

 (52.4), culmen from base 45.5-48.0 (47.0), tarsus 51.5-56.5 (54.2) 

 mm. 



Accidental visitor. The only record is of one shot by Karl Curtis in 



