BIRDS OF WESTERN COLOMBIA. 1163 



120. Myrmotherula schisticolor schisticolor Lawr. 



Formicivora schisticolor Lawrence, Ann. Lye. N. H. N. Y. viii. 

 p. 173 (1865.— Turrialba, Costa Rica). 



Myrmotherula schisticolor Hellmayr, Yerhandl. zool.-bot. Ges. 

 AVien, liii. 1903, p. 210 (ciit.). 



No. 3765. $. Siato, Rio Siato : 21.ix.08.— Wing 57; tail 

 39; bill 12 mm. 



" Iris dark brown, feet plumbeous, bill black, mandible horn- 

 coloured." 



This bird agrees well with females from Costa Rica (Rio 

 ISTaranjo, Boruca), Chiriqui (Boquete), and Western Ecuador, 

 except in being slightly more greyish, less brownish, on the upper 

 parts. I have not seen male examples from W. Colombia, but 

 several from W. Ecuador, which I have before me, I am unable 

 to separate from typical Costa Rican skins.* 



On the other hand, in the Sierra Nevada de Santa Martu, 

 N. Colombia, and in the mountains of Northern Venezuela 

 (Cumbre de Valencia, Cumand), a well-marked geographical race, 

 M. schisticolor sanclce-martce Allen t, takes its place. The male 

 may be immediately recognized in having the black colour 

 restricted to the throat and middle of the foreneck, while in 

 M. s. schisticolor it extends over the breast down to the upper 

 abdomen. The females are not always distinguishable, though 

 as a rule those of sanctce-raartce have the back of a purer olive- 

 grey, without any brownish tinge. The Munich Museum 

 possesses a good series of this rare form from the Cumbre de 

 Valencia and the mountains of Cumana, Venezuela. The two 

 males from S. Esteban, Venezuela, in the British Museum, Goering 

 coll.J, are likewise referable to M. s. sanctce-martce. 



121. Formicivora quixensis consobrina Scl. 



[Thamnophilits qiiixensis Cornalia, Veitebr. Syn. Osculati Coll. 

 p. 12 (1849.— Quixos, Eastern Ecuador).] 



Formicivora consohrina Sclater, P. Z. S. 1860, p. 279 (1860. — 

 Babahoyo, S.W. Ecuador) ; Sclater & Salvin, P. Z. S. 1879, p. 525 

 (Pocune). 



F. quixensis (nee Cornalia) Cassin, Proc. Acad. N. Sci. Philad. 

 1860, p. 190 (R. Truando). 



No. 1963. S ad. San Joaquim, Bahia del Choco, 3.viii.08. — 

 Wing 48; bill 12 mm. 



No. 2142. cS ad. Sipi : l.x.08.— Wing 48; tail 45; bill 

 13 mm. 



* Cavrikev (Ann. Carnegie Mus. vi. nos 2-4, 1910, p. 609), following Mr. Ridgway's 

 lead, calls the Costa-Rica form M. meneh'iesi scliisticolor. As a matter of fact, 

 however, the bird long known under the name M. menetriesii has nothing to do with 

 menetriesii of D'Orbignj', as I have clearly demonstrated in the paper quoted above. 

 M. menetriesii, D'Orb. belongs to quite a different section, being a close ally of 

 M. cinereiventris Scl. & Salv. Cfr. Bull. Soc. Philom. Paris (9) viii. 1906, pp. 51-2 ; 

 Nov. Zool. xiv. 1907, pp. 69-70. 



t M. sanctcB-martcd Allen, Bull. Amer. Mus. xiii. p. 160 (1900. — Valparaiso, 

 Santa Marta). 



J M. menetriesi (errore) Sclater, Cat. B. xv. p. 240 (part. ; b\ c-). 



