FAMILY DENDROCOLAPTIDAE 2<) 



the Rio Terraba (Diquis) and the Golfo Dulce area. It is known at 

 present in Panama from two records, one the female described above, 

 taken in forest at OHvo, 10 kilometers northeast of Puerto Armuelles. 

 This, the only one seen during several weeks of field work in this 

 area, was clinging in the usual woodpecker-fashion to a tree trunk. 

 Another female in the British Museum, from Bugaba, Chiriqui, 

 collected by Arce in 1869, compared to D. c. nigrirostris, has the 

 buff of the under surface duller, and the black banding faintly nar- 

 rower. While not wholly typical, it appears nearer hesperius, pos- 

 sibly from an area where the two forms concerned begin to inter- 

 grade. 



DENDROCOLAPTES CERTHIA NIGRIROSTRIS Todd 



Dendrocolaptes certhia nigrirostris Todd, Journ. Washington Acad. Sci. vol. 40, 

 no. 7, July 15, 1950, p. 237. (El Hogar, Costa Rica.) 



Characters. — Brighter, more cinnamon-buff below ; more rufous on 

 the crown ; black bars heavier, wider throughout ; back more heavily 

 barred. 



A female taken at Juan Mina, Canal Zone, January 17, 1961, had 

 the iris wood-brown ; maxilla black ; base of gonys and gape light 

 wood brown; rest of mandible dusky neutral gray; tarsus fuscous; 

 toes greenish gray ; claws dusky neutral gray. Another of the same 

 sex at El Real, Darien, January 25, 1964, had the iris very dark 

 brown ; tip of maxilla and basal half of cutting edge of maxilla and 

 mandible dull ivory-white ; central line of gonys fuscous ; rest of bill 

 black ; tarsus and toes dull greenish gray ; claws fuscous. 



Measurements. — Males (10 from Panama) wing 125.4—134.7 

 (129.9), tail 111.5-124.5 (117.7), culmen from base 38.5-41.9 (40.3), 

 tarsus 28.1-30.8 (29.2) mm. 



Females (10 from Panama), wing 122.7-128.8 (125.3), tail 

 106.8-119.8 (112.2), culmen from base 38.3-42.4 (39.8) tarsus 27.8- 

 30.8 (29.1) mm. 



Weight of one male 71 grams (Koford ) . 



Resident. Fairly common throughout lowland forests from 

 Chiriqui (except the Burica Peninsula) east through Darien and San 

 Bias ; casually in the mountains to 740 meters on the Rio Changuena, 

 Bocas del Toro, and to 1060 meters on Cerro Pirre, Darien. 



One taken at Cana on Cerro Pirre had the stomach filled with 

 fragments of cicadas, mixed with a few bits of small beetles. 



It is found regularly in the northern Canal Zone near Gamboa and 



