BIRDS OF NOETH AND MIDDLE AMEMCA. 



81 



instead of rufous- or tawny-chestnut, the upper parts also shghtly 

 darker. 



Adult male. — Length (skin), 109; wing, 49.5; tail, 46; culmen, 

 12.5; tarsus, 16.« 



Ad^dt feinale.— Length (skin), 116-121 (118); wing, 48.5-51.5 

 (50); tail, 45.5-52 (48.7); tarsus, 16.5; middle toe, 10.^ 



Northwestern Colombia (Rio Truando) to western Ecuador 

 (Babahoyo; Esmeraldas; Balzar Mts.; Sarayacu; Chimbo) and 

 Cayenne. 



Forinicivora consobrina Sclater, Proc. Zool. Soc. Lond., 1860, 279, 294 (Babahoyo, 

 w. Ecuador; coll. P. L. Sclater); Cat. Am. Birds, 1862, 183 (Babahoyo); Cat. 

 Birds Brit. Mus., xv, 1890, 255 (Babahoyo, Esmeraldas, Balzar Mts., and 

 Sarayacu, Ecuador; Pocune and Medellin, Antioquia, and Bogota, Colom- 

 bia; Cayenne). — Sclater and Salvin, Proc. Zool. Soc. Lond., 1879, 525 

 (Pocune, Antioquia, Colombia). — Berlepsch and Taczanowski, Proc. 

 Zool. Soc. Lond., 1883, 565 (Chimbo, w. Ecuador). 

 [Fonninrora] consobrina Sclater and Salvin, Nom. Av. Neotr., 1873, 72. — 



Sharpe, Hand-list, iii, 1901, 26. 

 D[ryinophila] consobrina Richmond, Auk, xvi, Oct., 1899, 354, in text. 

 Formicivora quixensis (not Thamnophilus qinxensis Cornalia) Cassin, Proc. Acad. 



Nat. Sci. Phila., 1860, 190 (Rio Truando, n. w. Colombia). 

 Formicivora boucardi (not of Sclater) Salvin and Godman, Biol. Centr.-Am., 

 Aves, ii, 1892, 216, part (Rio Truando). 



MICRORHOPIAS GRISEA ALTICINCTA (Bangs). 



SAN MIGUfiL ANTWREN. 



Similar to M. g. intermedia '^ of Colombia and Venezuela, but adult 

 male much darker above (deep grayish sepia, purplish slate color, or 

 deep brownish slate instead of hair brown or broccoli brown) and 

 more extensively black l:)eneath, the adult female darker brown 

 above and much more strongly buffy beneath. 



a One specimen, from Rio Truando, Colombia. 

 b Two specimens. 



Locality. 



Wing. 



Tar- 

 sus. 



Middle 

 toe. 



One adult female from Rio Truando, Colombia. 

 One adult female from Ecuador 



48.5 

 51.5 



45.5 

 [52?] 



16.5 

 16.5 



Besides having a longer wing and, apparently, much longer tail than the Rio 

 Truando specimen, that from Ecuador has the white tips to the rectrices much more 

 extensive. The specimens examined, however, are all imperfect, and a much 

 better series would be necessary to show whether the Colombian and Ecuadorian 

 birds are really different or not. 



cSee p. 77. 



81255°— Bull. 50—11 6 



