648 Bulletin American Museum of Natural History. [Vol. XXXIV, 
connection, since the form here described seems to lie between corassus and 
feniata. Its differences from the first-named have been sufficiently dwelt 
on. Examination of my single and topotypical specimen of tenzata shows 
that in this form the barring of the feathers of the breast and upper abdo- 
men are white with a somewhat irregularly crescentic black bar across the 
terminal half which is succeeded by a white area equal to or wider than the 
black band, the tips being very narrowly, almost indistinguishably black. 
In antioquensis the feathers of the corresponding area are white with a 
concealed black bar or spot at the base, a well defined regularly circular one 
on the terminal half followed by a narrower white band with, as in teniata, 
a very narrow black margin. 
The various forms here mentioned are obviously races of one species, 
and for the present I have placed them under squamulatus, the first of the 
immediate group known. However, two specimens from eastern Panama 
strongly indicate intergradation of the barred breasted forms with M. 
luscinea of the Canal Zone and if, as Mr. Bangs surmises (Proc. Biol. Soc. 
Wash., XXII, 1909, p. 34) there is but one form in Central America, the 
entire group may stand as races of M. philomela (Salv.). 
Measurements. 
Name Place Sex Wing Tail Tarsus Culmen 
M. s. antioquensis Dabeiba, Col. Si 259 22 24. 20 
“6 (4 4 (3 fet 55 : 5 20 2T : 5 20 
a . Alto Bonito, “ Cos BO 22 22, 19 
M. s. corassus Don Diego, Sta. Marta o 53 19 75 SE Bees 
hoe t : a: o (60 23.50: 22 19.5 
M.s. squamulatus Las Quiguas, Venez. oe 4) 60 23 22 19.5 
(7 “ “ l “ {3 {4 fot 60 21 23 19 
M. s. corassus Sta. Marta, Col. O- «D8 21 26.07 S17 
ye : Don, Dieso, Sta. Martas- 9 O- 58.5. 21 BUo = 417 
M.s. squamulatus Las Quiguas, Ven. Ou 58 21 Oe oe 19 
“ “ “ <3 (%5 “ Q 58 ; 5 2C 2 ¢ 5 19 
penn ‘ Le, Cumbre...) “ 001,05 28 22 20 
M. s. teniata Chone, Ecuador Q 
Yo ope. 20a. 28 19 
Polioptila livida daguz subsp. nov. 
Char. subsp.— Similar to Polioptila 1. plumbeiceps (Lawr.) but much darker above, 
the back, etc., slate-gray rather than gull-gray (No. 7), the inner wing-quills narrowly 
instead of widely margined with whitish, outer pair of tail-feathers white almost to 
the base; no indication of a superciliary. 
Type.— No. 108286, Am. Mus. Nat. Hist., o ad., Los Cisneros, Dagua River, 
west Colombia; March 20, 1911; W. B. Richardson. 
