74 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Females (10 from Chiriqui and Costa Rica), wing 73.6-77.2 

 (75.8), tail 70.5-78.8 (74.0. average of 9), culmen from base 13.0- 

 14.7 (13.9), tarsus 20.0-20.5 (20.2. average of 9) mm. 



Resident. Uncommon in forested areas in the higher mountains 

 of western Chiriqui from the eastern side of the great volcano west 

 to the Costa Rican boundary. 



In my few encounters I have found these quiet little birds in 

 heavy forest on the higher mountain slopes, ranging alone or oc- 

 casionally in pairs. Some have worked over dead leaves lodged among 

 parasitic plants, or through the mossy growth covering the branches. 

 Others have climbed up vertical tree trunks, with the tail braced, 

 woodpecker-fashion, as a support. In this they resemble wood- 

 creepers, though it will be noted that the tail tip is more flexible. 

 Their actions on the whole, however, except for this use of the tail, 

 are more those of a wren. 



In Costa Rica, where they appear to be more common, Slud 

 (Bull. Amer. Mus. Nat. Hist., vol. 128, 1964, pp. 203-204) has 

 found them at times moving in mixed bands of small forest birds. 

 Their calls, described as "thinly whistled," or chipping, resemble 

 in general those of the other species that are their companions. They 

 range in Panama in the central highlands and along the Cordillera de 

 Talamanca. As they are found on the Caribbean slope, it is probable 

 that they will be encountered on the higher inland mountains of 

 Bocas del Toro when these are better known. 



MARGARORNIS RUBIGINOSUS BOULTONI Griscom 



Margarornis rubiginosa boultoni Griscom, Amer. Mus. Nov., no. 141, October 

 31, 1924, p. 4. (Cerro Flores, 1675 meters, eastern Chiriqui, Panama.) 



Characters. — Brighter, more rufous-brown above; head darker, 

 distinctly rufescent ; lower surface brighter, more rufous ; white 

 spotting on breast reduced in amount, or in some absent : slightly 

 smaller. 



Measurements. — Males (2 from Veraguas) wing 70.0, 72.8; tail 

 62.0, 67.2; culmen from base 13.5, 14.4; tarsus 19.6, 19.6 mm. 



Females (6 from eastern Chiriqui and Veraguas). wing 69.6-72.0 

 (71.2). tail 64.5-72.7 (67.2). culmen from base 14.0-15.5 (14.7, 

 average of 5). tarsus 19.2-19.8 (19.6) mm. 



Resident. Little known ; found in the mountains of eastern 

 Chiriqui and Veraguas. 



The race was described from two females collected at a high camp 

 on Cerro Flores. in eastern Chiriqui. The elevation given as "6000 



