FAMILY FORMICARIIDAE 185 



near the mouth of the Rio Cacique at the head of Bahia Santelmo 

 in the southern end of the island in late January 1960, as here much 

 of the forest had been cut. Nor did I see them at Mafofa on the 

 southern peninsula in examination of the cover adjacent to the air- 

 strip in several journeys when the plane stopped there briefly. 



The subspecies alticincta is closely similar to the race bondae 

 found in northwestern Colombia, from the eastern shore of Golfo de 

 Uraba (Necocli) eastward mainly in the departments of Cordoba and 

 Bolivar, dififering in darker dorsal coloration in both male and female, 

 and also in decidedly heavier bill. Relationship obviously is close 

 between these two. The race intermedia from the Santa Marta 

 area, west through Guajira into northern Venezuela, dififers strongly 

 in the spotted breast and foreneck of the female, as well as in the 

 more slender bill of both sexes. 



TERENURA CALLINOTA CALLINOTA (Sclater) : Rufous-backed 

 Ant-wren, Hormiguerito Lomo Acanelado 



Formicivora callinota P. L. Sclater, Proc. Zool. Soc. London, pt. 23, July 23, 

 1855, p. 89, pi. 96. (Bogota, Colombia.) 



Small, slender ; crown black ; lower back and rump rufous. 



Description. — Length 97-100 mm. Male, crown dull black; lower 

 hindneck, upper back, and scapulars greenish olive ; upper back 

 streaked with black, with a concealed patch of rufous ; lower back and 

 rump rufous-chestnut; upper tail coverts pale greenish olive; inner 

 lesser wing coverts bright yellow ; outer lesser coverts black ; middle 

 and greater wing coverts dull black tipped with yellowish white ; pri- 

 maries and secondaries dusky, edged narrowly with greenish olive ; 

 tail dull grayish brown, tipped faintly with white ; lores and narrow 

 superciliary grayish white ; side of head dull gray ; edge of eyelids, 

 above and below, and a line behind the eye black ; ramal area white ; 

 throat, foreneck, and upper breast dull white, becoming grayish 

 toward sides ; sides and lower breast somewhat greenish yellow ; 

 flanks, abdomen, and under tail coverts brighter yellow ; under wing 

 coverts and axillars pale yellow. 



Female, crown grayish olive ; otherwise somewhat duller than 

 male. 



Measurements. — Males (3 from Veraguas, Darien, and Huila, 

 Colombia), wing 48.0-53.2 (50.3), tail 37.5-44.8 (40.9), culmen 

 from base 13.5-13.8 (13.6), tarsus 14.7-16.6 (15.6) mm. 



Females (8 from Chiriqui, southern Colombia, and western Ecua- 



