36 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



author hidden, so that there is often difficulty in tracing it to the 

 source. The birds are vociferous in early morning and late evening, 

 their notes being one of the especially pleasing jungle sounds. 



For so common a species little is known regarding its breeding 

 except that it nests in holes and that its eggs are white. 



The usual country name is suhipalo. though occasionally they are 

 called pega pega. 



The species is one of wide range from Guatemala and Honduras 

 south through the forested areas of the Tropical Zone to eastern 

 Bolivia and south-central Brazil. The range of individual variation 

 in color is considerable, with fully grown immature birds being 

 always darker than adults. Three slightly marked subspecies may 

 be recognized in the Republic. In examination of study skins it 

 should be kept in mind that the buff tints of the lower surface fade 

 appreciably with passage of years even though carefully protected 

 in museum cases. A series collected by E. A. Goldman in 1911 in 

 the lower Chagres Valley differ more from those I have taken in 

 the same area in the past 15 years than do fresh specimens of the 

 three races here recognized. 



XIPHORHYNCHUS GUTTATUS COSTARICENSIS (Ridgway) 



Dendrornis lawrencei costaricensis Ridgway, Proc. U.S. Nat. Mus., vol. 10, 

 August 6, 1888, p. 510. (Tucurriqui, Cartago, Costa Rica.) 



Characters. — Darker ; somewhat deeper reddish brown on back and 

 rump; slightly more olive in the darker hues of the lower surface; 

 streaking above and below somewhat reduced. 



A breeding male taken at Puerto Armuelles, Chiriqui, February 19, 

 1966, had the iris dark brown ; maxilla black ; mandible light neutral 

 gray ; tarsus, toes, and claws brownish gray. 



Measurements. — Males (18 from Honduras, Nicaragua, Costa 

 Rica, and Panama), wing 100.0-108.5 (105.2), tail 82.0-96.8 (88.9), 

 culmen from base 35.6-39.6 (37.6), tarsus 22.5-23.9 (23.1) mm. 



Females (10 from Nicaragua, Costa Rica, and Panama), wing 

 92.0-99.6 (95.7), tail 76.7-83.7 (80.5, average of 9). culmen from 

 base 30.4-39.5 (35.7), tarsus 21.3-23.5 (22.5) mm. 



Range. — Pacific slope in western Chiriqui ; Caribbean slope from 

 the Costa Rican boundary in Bocas del Toro to western Colon. 



In southwestern Chiriqui in 1966 I found this race fairly common 

 near Puerto Armuelles. Earlier, specimens were taken by W. W. 

 Brown at Divala in November and December 1900. The bird has 



