202 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



It now is known as El Pozo de Terraba, according to information 

 received from Dr. Paul Slud. Bonica is a hill town at about 450 

 meters, located some distance farther inland. Bangs in his list of 

 types (Bull. Mus. Comp. Zool., vol. 70, 1930, p. 189) merely quoted 

 what Swann had written, but with correction of the spelling of 

 Boruca, as he cites the locality as "Boruca, Pozo del Rio Grande," 

 without realizing that the two geographic terms represented two 

 distinct places. 



BUTEO BRACHYURUS Vieillot: Short-tailed Hawk; Gavilan Cola Corta 



Buteo brachyurus Vieillot, Nouv. Diet. Hist. Nat., nouv. ed., vol. 4, Dec, 1816, 

 p. 477. (Cayenne.) 



A small hawk. In black phase, black with short, white-banded tail. 

 In light phase, white below, with a wash of cinnamon on sides of 

 breast. 



Description. — Length 370-460 mm. Adult, dark phase, black to 

 brownish black throughout, with a slight indication of grayish wash 

 on the upper back ; forehead and anterior part of lores narrowly 

 white, with the feather shafts black; back part of crown and upper 

 hindneck with concealed white bases ; upper tail coverts with hidden 

 bars of white ; longer outermost under wing coverts dark neutral 

 gray, the rest and the axillars black; central area of flight feathers 

 marbled with white and pale gray ; tips of primaries dull gray ; tips 

 of secondaries dull mouse gray ; shafts of flight feathers black above 

 white underneath, except for the tips which are dark brown ; upper 

 surface of tail with 5 or 6 dull brownish gray bands ; tail with a 

 narrow, indistinct terminal band of mouse brown, tipped faintly with 

 grayish white. 



Adult, light phase, above dark grayish brown ; white on forehead 

 and anterior lores more extensive than in dark phase; primaries and 

 secondaries dull black; tail with 6 somewhat irregular black bands 

 across the gray-brown feathers, which are tipped with brownish 

 black, and margined lightly with white to grayish white ; sides of 

 head and neck brownish black, changing to dull cinnamon on sides 

 of upper breast ; under surface elsewhere pure white ; under wing 

 white, except for neutral gray spots on the ends of the longest 

 outermost under coverts, and the tips of the primaries which are 

 blackish brown ; inner primaries and secondaries white to light gray 

 banded with light neutral gray to mouse brown. 



Iris brown ; bill black, becoming slate gray at base of mandible ; 

 cere yellow ; tarsus and toes yellow ; claws black. 



