FAMILY PIPRIDAE 327 



CORAPIPO ALTERA HETEROLEUCA Hellmayr 



Corapipo leucorrhoa hctcrolciica Hellmayr, Bull. Brit. Orn. Club, vol. 25, March 

 31, 1910, p. 87. (Boquete, 1065 meters, Chiriqui, Panama.) 



Characters. — Adult male with the black in the neck pattern making 

 a conspicuous V-shaped indentation at the center of the posterior 

 border of the white throat (evident in immature males early, as they 

 begin to assume adult dress). Female, closely similar to nominate 

 altera in color, averaging very slightly darker on abdomen but not 

 always certainly separable from C. a. altera. 



An adult male at Palo Santo, west of El Volcan, Chiriqui, on 

 March 17, 1965, had the iris chestnut; maxilla black; mandible dark 

 neutral gray ; tarsus very dark reddish brown ; toes blackish slate ; 

 claws black. A female at the same locality, March 18, 1965, had the 

 iris chestnut-brown ; maxilla slaty black ; mandible pale neutral gray ; 

 tarsus and toes dark neutral gray ; claws fuscous-black. 



Measurements. — Males (10 from western Chiriqui), wing 58.2- 

 60.7 (59.2), tail 29.0-30.8 (30.0), culmen from base 9.2-10.3 (9.7), 

 tarsus 15.5-16.5 (16.0) mm. 



Females (10 from Chiriqui and Costa Rica), wing 57.6-61.3 

 (59.4), tail 28.2-31.2 (29.6), culmen from base 9.6-11.0 (10.2), 

 tarsus 15.5-17.0 (16.6) mm. 



Resident. Recorded from the Tropical and lower Subtropical Zones 

 to 1585 meters in western Chiriqui, from near the Costa Rican 

 boundary east to Bugaba, Divala, and Boquete. 



As Skutch, in southwestern Costa Rica (Publ. Nuttall Orn. Club, 

 no. 7, 1967, pp. 68-69) found these birds from sea level at Golfo 

 Dulce to 1524 meters, but breeding only above a thousand meters, it 

 is possible that across the border in Chiriqui they may also appear 

 at lower levels during post-breeding movements. 



The first record for the species in Panama is that of Salvin 

 (Proc. Zool. Soc. London, 1870, p. 200) from Bugaba, where a speci- 

 men (in the British Museum) was taken by Arce in 1869. Bangs 

 (Auk, 1901, p. 364) recorded three males taken by W. W. Brown, 

 Jr., at Divala in November and December, 1900, and (Proc. New 

 England Zool. Club, vol. 3, 1902, p. 40) others at Boquete from 

 March to May 1901. Specimens in the California Academy of Sci- 

 ences were collected by Mrs. Davidson on the llano beyond El Volcan 

 December 20, 1929, at Barriles January 21 and 27, 1931, and at 

 El Banco on the southern slope of the volcano December 16, 1930. 



In my own observations from near El Volcan west to near Sereno 

 on the Costa Rican line in western Chiriqui I have found them regu- 



