FAMILY FORMICARIIDAE 183 



coast toward the boundary with Colombia. I collected them also at 

 Armila in eastern San Bias in 1963. 



Schonwetter (Handb. Ool., pt. 14, 1967. p. 38) stated that he had 

 one egg in his collection, and had seen nine others in the cabinet of 

 Passler. He described them as creamy white, without gloss, marked 

 with small spots of lilac-gray, dark purple-gray, and dark violet- 

 brown. He gives the measurements as 16.0-18.7x12.3-13.3 mm. 



The subspecies cousohriua ranges across northern Colombia to the 

 lower Cauca and Magdalena valleys, and south in the west to western 

 Ecuador. 



FORMICIVORA GRISEA ALTICINCTA Bangs: Black breasted 

 Ant-wren, Hormiguerito Pechinegro 



Formicivora alticincta Bangs, Proc. New England Zool. Club, vol. 3. March 

 31, 1902, p. 71. (Isla del Rey, Archipielago de las Perlas, Panama.) 



Small warbler size ; under surface in male, black with white sides, 

 in female buff ; color pattern like that in the Dotted-winged Ant-wren, 

 but bird definitely larger. 



Description. — Length 110-120 mm. Without concealed white patch 

 on back. Adult male, forehead and a prominent superciliary, extend- 

 ing back to nape, white ; upper surface from crown to rump dark 

 grayish brown ; pileum with faintly indicated dark streaks ; upper 

 tail coverts tipped with white to buff; wings black, shoulder white; 

 wing coverts tipped with white, forming a broad band on the greater 

 coverts ; inner primaries and secondaries edged Hghtly with huffy 

 white ; two outermost rectrices tipped and edged widely with white ; 

 others with narrower white tips, with those on the central pair often 

 worn or missing ; side of head, foreneck, breast, abdomen, and under 

 tail coverts black ; sides and flanks white ; under wing coverts black, 

 spotted distally with white ; inner webs of primaries white. 



Adult female, above rather dull brown ; side of head, throat, and 

 abdomen white ; tibia white, with partly concealed bases of feathers 

 black; breast and sides buff; otherwise like the adult male. 



Immature male, sides light cinnamon-buff; breast blotched irregu- 

 larly with black and white. 



On the label of a male in the British Museum the collector, H. J. 

 Kelsall, noted the iris as dark brown, bill dark horn, legs and feet 

 slatish blue. 



Measurements. — Males (10 from Islas San Jose, Pedro Gonzalez, 

 and del Rey), wing 52.8-55.9 (54.1), tail 43.5-46.8 (45.1). culmen 

 from base 15.8-17.2 (16.6), tarsus 19.7-20.9 (20.6) mm. 



