BIRDS OF WESTERN COLOMBIA. 1161 



(b) M. SURINAMENSIS PACIFICA Helllll. 



M. surinamensis (nee Gmelin) Cassin, Proc. Acad. N. Sci. Philad. 

 1 860, p. 1 90 (R. Truando, JST. Colombia) ; Lawrence, Ann. Lye. IST. H . 

 N. Y. vii. 1861, p. 293 (Isthmns of Panama); Sclater & Salvin, 

 P. Z. S. 1864, p. 356 (Lion Hill, Panama); Sclater k Salvin, 

 P. Z. S. 1879, p. 525 (Remedios) ; Berlepsch k Taczanowski, 

 P. Z. S. 1883, p. 564 (Cliimbo, S.W. Ecuador); Sclater, Cat. B. 

 Brit. Mus. XV. p. 231 (part.: a-g,j,k,l); Salvadori & Festa,, 

 Boll. Mus. Zool. Torino, xiv. no. 362, 1899, p. 29 (part.: Peripa, 

 W. Ecuador) ; Hartert, Kov. Zool. ix. 1902, p. 612 (San Javier, 

 Pambiltir, N.W. Ecuador) ; Goodfellow, Ibis, 1902, p. 64 

 (S. Nicolas, Gualea, W. Ecuadoi-). 



'' Myrmotherula V Sclater, P.Z.S. 1860, p. 294 (Esmeraldas, 



N.W. Ecuador). 



Adult. Bill strong and heavy ; white tips to external rectrices 

 larger, varying from three to five millimetres in width on the 

 outermost pair. Upper back, in tlie male, much less variegated 

 with black, the white dorsal patch much less extended. Eemale 

 with upper part of the head much lighter, tawny ochraceous, crown 

 and hind neck with narrow, rather indistinct, dusky olive shaft- 

 streaks ; upper back mainly pale gi'ey, I'ather sparingly spotted 

 with black and edged with white, but without any trace of the 

 white dorsal blotch. Sides of the head and lower parts exactly as 

 in the female of M . s. surinamensis. 



Hab. Western Ecuador : Peripa {Festa), Intac {Buckley), 

 San Nicolas, Gualea {Goodfellow i; Hamilton), Chimbo {Siemi- 

 radzki), Esmeraldas {Fi-aser), San Javier, Pambildr {Flemming Sc 

 Miketta). Western Colombia : Buenaventura {Andre), Guineo, 

 Sipi {Palmer), Juntas {Rosenberg, Raap), Naranjo {Andre), 

 Remedios (*S'«^mon), R. Truando {Wood). Isthmus of Panama: 

 Lion Hill {McLeannan), San Pablo {Salviii), Yeragua (Arce). 

 [Also in Bogota coll.] 



Material. 41 specimens. Birds from various localities average 

 as follows : — 



Eight 6 6 ad. W. Ecuador.— Wing 51-53 ; tail 28-30 ; 



bill 16 mm. 

 Six S 6 ad. W. Colombia, Choco district. — Wing 52^-54 ; 



tail 29-3U ; bill l^-\^ mm. 

 Two c5' 6 ad.~ Panama (Lion Hill). — Wing 51 ; tail 27, 28 ; 



bill 15^, 16 mm. 

 Thirteen ~5 $ ad. W. Ecuador.— Wing 49-52; tail 28-30| ; 



bill 15-16 mm. 

 Eight 2 $ . W. Colombia, Choco district.— Wing 50-52 ; 



tail 28-30-J ; bill 14^-16 mm. 

 One 5 . Remedios, N.W. Colombia. — Wing 52| ; tail 30^ ; 



bill 15 mm. 

 . Two 2 $ ad. Bogota.— Wing 52, 53 ; tail 30, 31 ; bill 15 mm. 

 One $ ad. Panama (Lion Hill).— Wing 50 ; tail 27| ; bill 



15 mm. 



