444 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Panama are slightly intermediate in darker colors and a wash of gray 

 on the throat toward this race. 



RHYTIPTERNA HOLERYTHRA HOLERYTHRA (Sclater and 

 Salvin) : Rufous Mourner, Planidera Acanelada 



Lipaugus Jwlcrytlierus Sclater and Salvin, Proc. Zool. Sec. London, pt. 28, 

 August 1860, p. 300. (Choctum, Alta Verapaz, Guatemala.) 



Medium size ; warm brown, darker above, paler below. 



Description. — Length 180-190 mm. Posterior face of upper end 

 of tarsus serrate ; rictal and frontal bristles prominent, strongly de- 

 veloped. Adult (sexes alike), upper surface cinnamon-brown to 

 russet ; primaries and secondaries darker brown, edged with cin- 

 namon-rufous ; tail centrally darker, with the outer feathers cinna- 

 mon-rufous ; under surface including axillars and under wing coverts 

 tawny-ochraceous, darker on the breast, paler on throat and abdomen. 



Juvenile, similar, but brighter, more rufous above, paler, more 

 cinnamon-buff on under surface. 



A female, taken at the head of Rio Guabal, Code, March 1, 1962, 

 had the iris light brown ; base of maxilla fuscous-brown ; distal end 

 of maxilla and tip of mandible dull black ; base of mandible dull 

 brownish white ; tarsus neutral gray ; toes and claws dark neutral 

 gray. Another female, from Cerro Mali, Darien, had the iris warm 

 brown ; maxilla at base fuscous-brown, shading to black at tip ; tip of 

 mandible black; cutting edge of maxilla at base, and rest of mandible, 

 dull horn color; back of tarsus dull black; front and toes dusky 

 neutral gray ; claws black ; gape dull honey yellow ; inside of mouth 

 orange. 



Measurements. — Males (10 from Chiriqui, Bocas del Toro, Code, 

 Province of Panama, and Darien), wing 103.4-105.9 (104.3), tail 

 86.8-94.0 (90.6), culmen from base 20.5-23.1 (21.8). tarsus 22.4- 

 23.8 (23.2) mm. 



Females (10 from Chiriqui, Code. Province of Panama, and 

 Darien), wing 97.0-101.8 (100.0), tail 84.5-90.6 (86.9), culmen 

 from base 20.4-22.9 (21.4), tarsus 21.5-22.7 (22.3) mm. 



Resident. Fairly common locally in forest through the Tropical 

 Zone and lower Subtropical Zone on the Pacific slope from the Costa 

 Rican boundary in Chiriqui to Veraguas ; and from Cerro Campana 

 and Cerro Azul, Province of Panama, through Darien ; on the 

 Caribbean side from western Bocas del Toro east to the northern 

 Canal Zone and the valley of the Rio Chagres ; to 1375 meters west 

 of El Volcan and 1425 meters on Cerro Tacarcuna. 



