222 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



Zoolog)', obtained by Hasso von Wedel, In the Brandt Collection at 

 the University of Cincinnati there are 5 males taken by Wedcl at 

 Puerto Obaldia, San Bias, in 1931 and 1933. In addition to these, 

 near Armila, San Bias, on March 4, 1963, one of C. O. Handley's 

 assistants brought me an adult male shot in heavy forest. This bird 

 had the iris brownish orange; cere and base of bill below the level 

 of the nostril, the gape, and the mandibular rami orange ; a small area 

 on the base of the maxilla, in front of the orange, and the base of 

 the gonys neutral gray; anterior part of bill black; tarsus and toes 

 orange yellow ; claws black. 



Apparently this species ranges in forest in a manner similar to 

 that of the more common Leiicopternis semiplumhea. It is probable 

 that through clearing of its normal cover it is no longer found in 

 the western part of the Republic. 



LEUCOPTERNIS PRINCEPS Sclater: Barred Hawk; Gavilan Rayado 



Leiicopternis princcps P. L. Sclater, Proc. Zool. Soc. London, Oct. 1<S65, p. 429, 



pi. 24. (Tucurriqui, Costa Rica.) 

 Leucoptemis prince ps simmeri Friedmann, Auk, vol. 52, Jan. 8, 1935, p. 30. (San 



Jose de Sumaco, northeastern Ecuador.) 



Black above and on foreneck; closely barred black and white on 

 rest of lower surface. 



Description. — Length 550 to 590 mm. Adult, upper breast, throat, 

 head, and entire upper surface black, with a faint bloom of gray 

 through narrow edgings of this color at the ends of many feathers ; 

 plumage with a concealed base of white, particularly on crown and 

 hindneck ; band across tail, and hidden bars on inner secondaries, 

 white; lower surface, (except upper breast), including edge of wing, 

 under wing coverts, and under tail coverts, white, barred narrowly 

 with numerous bands of black ; under surface of wings gray, marbled 

 with white, barred distally and tipped with dark neutral gray. 



Immature, like the adult but with wing coverts narrowly tipped 

 with white. 



Kennard made the following record of the soft parts from a male 

 taken on the Boquete Trail, March 12, 1926: "Bill chrome yellow 

 and tea green; iris dark chocolate; tarsus chrome yellow" (Kennard 

 and Peters, Proc. Boston Soc. Nat. Hist., 1928, p. 449). 



Measurements. — Males (3 from Costa Rica and Panama), wing 

 347-360 (354.3), tail 185-220 (199.7), culmen from cere 28.7-30.8 

 (29.5), tarsus 80.5-98.3 (91.2) mm. 



Females (5 from Costa Rica and Panama), wing 352-381 (368), 

 tail 191-218 (201.8), culmen from cere 29.2-33.3 (31.4), tarsus 95.0- 

 96.5 (95.5) mm. 



