FAMILY FURNARIIDAE 69 



secondaries dark mouse gray, edged widely toward base with dull 

 tawny. 



Measurements. — Males (3 specimens), wing 62.8-65.8 (64.1), tail 

 59.6-61.4 (60.3), culmen from base 14.0-15.4 (14.8), tarsus 17.2- 

 18.0(17.7) mm. 



Females (3 specimens), wing 61.6-62.4 (61.9), tail 58.2-60.3 

 (59.5), culmen from base 14.6-15.3 (15.1), tarsus 17.0-17.8 (17.4) 

 mm. 



Resident. Fairly common, in forested areas on Isla Coiba. 



During January and February 1956, I found these interesting 

 birds from the borders of the swampy woodlands along the lower 

 Rio Catival inland to the higher forest of the uplands, ranging 

 through the borders of thickets and in the forest up into the lower 

 branches below the high tree crown. They were seen singly, and 

 usually were difficult to find in the dense cover of leaves of the 

 forest tangles that they frequented. Their method of progression 

 was by climbing through the denser cover, at times up vertical tree 

 trunks (but without using the tail as a brace), rather than over the 

 more open branches, a method of movement for which their large, 

 strong feet are definitely suited. On the whole they were like the 

 Red-faced Spinetail, Cranioleuca erythrops rufigenis of the Sub- 

 tropical Zone forests of the Volcan de Chiriqui. 



The general appearance is that of the forms now allocated under 

 the species name Cranioleuca vulpina (Pelzeln), found mainly in 

 Brazil, with two forms recorded north to the valley of the Orinoco 

 in Venezuela, and eastern Colombia. From these the bird of Isla 

 Coiba differs in brighter brown coloration on the lower surface. 

 While relationship to the vulpina group is evident, it is possible that 

 further information may demonstrate that the bird of far distant 

 Coiba is a separate species. 



Two sets of three eggs each of the typical form Cranioleuca vulpina 

 vulpina in the U.S. National Museum were collected by Ernest G. 

 Holt at Conceigao de Araguaya, southeastern Para, Brazil, No- 

 vember 15 and 17, 1926. The nests were irregular accumulations of 

 rootlets and other material placed in bushes on the river bank, one 

 20 centimeters in diameter, located a meter and a half above the 

 ground, the other 25 by 35 centimeters, elevated 4 meters or so. 

 The nest chambers were cavities in the lower portion of the mass, 

 "lined with finely shredded inner bark and a few lichens." In each set 



