BIRDS OF NORTH AND MIDDLE AMERICA. 79 



Young male (nestling). — A])ove plain sooty blackish or blackish 

 brown (nearly clove brown), rather lighter (dark sepia) on head, the 

 wings and tail nearly black; greater wing-coverts rather broadly 

 tipped with white but with a narrow terminal margin of dusky; 

 rectrices (except middle pair) tipped wuth white, as in adults; under 

 parts plain dark sooty brown, tinged with chestnut-brown or Vandyke 

 brown. 



Southeastern Alexico, in States of Vera Cruz (Playa Vicente; Buena 

 Vista), Oaxaca (Acatepec) and Tabasco (Teapa) through Guatemala 

 (Choctum; sources of Rio de la Pasion; Yzabal; Teleman; Los 

 Amates; Uspantan, Quiche) to Honduras (Oinoa; San Pedro; Rio 

 Blanco) and British Honduras (near Manatee Lagoon; Toledo 

 District) . 



Formicivora bovcardi Sclater, Proc. Zool. Soc. Lond., 1858, 241, 300 (Acdtepec, 

 Oaxaca; coll. P. L. Sclater); 1859, 383 (Playa Vicente, Vera Cruz); Cat. 

 Am. Birds, 1862, 183, pi. 16 (Oaxaca; Choctum, Guatemala); Cat. Birds 

 Brit. Mus., XV, 1890, 254, part (Acdtepec, Oaxaca; Choctum and sources of 

 Rio de la Pasion, Guatemala). — Moore, Proc. Zool. Soc. Lond., 1859, 55 

 (Omoa, Honduras). — Sclater and Salvin, Ibis, 1859, 119 (Omoa, Honduras; 

 Proc. Zool. Soc. Lond., 1870, 837 (San Pedro, Honduras).— Salvin and God- 

 man, Biol. Centr.-Am., Aves, ii, 1892, 216, part (Acatepec; Playa Vicente; 

 Choctum, Yzabdl, and Telemdn, Guatemala; Omoa and San Pedro, Hon- 

 duras).— Dearborn, Pub. 125, Field Mus. Nat. Hist., 1907, 109 (Los Amates, 

 e. Guatemala). 



[Forviicirora] houcardi Sclater and Salvin, Nom. Av. Neotr., 1873, 72, part.— 

 Sharps, Hand-list, iii, 1901, 26, part. 



Formicivora boucardii Boucard, Ann. Soc. Linn. Lyon, 1878, 39 (Guatemala; 

 Playa Vicente, Vera Cruz). 



D[rymophUa] boiicardi Richmond, Auk, xvi, Oct., 1899, 354, in text. 



MICRORHOPIAS BOUCARDI VIRGATA (Lawrence). 



PANAMA ANTWREN. 



Smiilar to M. h. houcardi but adult male more intensely and 

 extensively black (even the sides and flanks usually black or slate- 

 black)," the adult female with color of under parts much darker 

 (rufous-chestnut instead of rufous-tawny) and upper parts darker. 



Adult maZe.— Length (skins), 96-113 (106); wing, 47.5-51 (49.5); 

 tail, 40-49 (45.9); culmen, 13-14.5 (13.8); tarsus, 15-16 (15.7); 

 middle toe, 8.5-9.5 (8.9).'' 



o A few specimens from Nicaragua and Costa Rica have the flanks slate color, 

 much as in northern examples (M. b. boucardi), but all of the females seen from 

 Costa Rica belong unmistakably to the Panama form. (I have not seen any females 

 from Nicaragua.) 



The white mesial streaks showing on the adult male described by Mr. Lawrence 

 (and on which the name virguta was based) are an individual peculiarity, which I 

 do not find repeated in any other specimen examined, even from Panamd. 



This form is distinctly intermediate in coloration between M. b. boucardi and 

 M. b. consobrina of Colombia and Ecuador. 



^Twenty-one specimens. 



