16 PASSERES 
Polioptila superciliavis Lawrence, Ann. Lyc. Nat. Hist. New York, Vol. 7, p 304 (1861) (Lion Hill, Panama R. R.). 
Polioptila superciliavis magna Ridgway, Proc. Biol. Soc. Wash. Vol. 16, p. 110 (1903) (Cartago, Costa Rica; based 
on a single female!) 
Hab, Central America, from Guatemala to Veragua (Chitra) and Panama (line of Panama Railroad); 
northern Colombia (Coast region : Cartagena, Santa Marta, Bonda); south through western Ecuador 
(Nanegal, Babahoyo, Guayaquil, Esmeraldas, Balzar, Vinces, Santo Domingo, Yaguachi, Santa 
Elena, Puna Isl, etc.) to N. W. Peru (Guadalupe. Tumbez, Lechugal. Pacasmayo, Tembladera), 
in the mountains up to 1200 feet (Tembladera), 
14. Polioptila bilineata andina Hellmayr. 
Polioptila bilineata andina Hellmayr, Verh. Zool.-bot. Ges. Wien, Vol. 53, p. 224 (1903) (Cajabamba, North Peru, 
9000 feet). 
Hab. High Mountains of North Peru : Cajabamba, at elevations of o000 feet. 
15. Polioptila albiloris albiloris Sclater & Salvin. 
Polioptila albiloris Sclater & Salvin, Proc. Zool, Soc. Lond, 1860, p. 298 (1860) (Motagua Valley, Guatemala). 
Fig. Salvin & Godman, Biol. Centr.-Amer. Aves, Vol. 1, 1879, pl. 5, ff. 1, 2. 
Hab. Guatemala (Chuacus) to Oaxaca (Santa Efigenia, Tehuantepec, Cuicuitlan, Huilotepec, Tapana) 
in S. W. Mexico. 
16. Polioptila albiloris bairdi Ridgway. 
Polioptila baiydi Ridgway, Proc. Biol. Soc. Wash. Vol. 16, p. 110 (1903) (San Juan del Sur, Nicaragua). 
Hab. Western Nicaragua (Realejo, San Juan del Sur, Sucuya, Grenada) and Costa Rica (Liberia, 
Miravelles, Bebedero, Bagaces, Cartago). 
17. Polioptila nigriceps albiventris Lawrence. 
Polioptila albiventris Lawrence, Ann, New York Acad. Sc. Vol. 3, p. 273 (1885) (Temax, Yucatan). 
Hab. Yucatan (Temax, Progreso) and Cozumel Island. 
forms as races, were it not that my extensive series from Western Ecuador and N. W. Peru shewed such a considerable 
amount of individual variation in the colour of the belly, half of the skins being like P. supeyciliayis from Central America, 
while the other half exactly resembled the types of C. bilineata. Hence it became impossible to admit more than one form, 
The dimensions which Mr. Ridgway gives for the type of his P. superciliaris magna are well within the limits of individual 
variation of the species. 
P. BILINEATA (Bonaparte) Wing Tail 
Tirade.) Gantarenar dhy,perotsthe SPeGies an. i llmes ne nec ee 46.5 42, mm. 
8iGGrad. Wi. Ecuador (Guayaquil Balzam)) 9 =e) ee enn ee 47-52 42-47 » 
Th Sarl ee Nc TL Ocal NV fo GUY AL Oyo 48 49.2») 
Ton nel Crammed UTI OZ agIN WAV ew ELE TAUT ee electing) Soe eee 50 a5) » 
20Gad. Tembladera, N. Peru. . .. . ‘i sry gece Sees 47.90 45,48 > 
Te Olade se Gantdmenda-MliypelOrthe:SPCCLesi sl] lle illil lela nennE: 49 41,5» 
SEOGE (Cte y ame Wes aeeClimy a Bas Soo eb a 5 a 2 49-50 44-45 » 
229 ad. Balzar, W. Ecuador . . Seeks ee ars et : 47 44,40 » 
5) 2 9vad" Nembladera NeW eerw) cr -) 2) 3 asl oe Seen 47-49 49-49 » 
12ad. TYumbez, N. W. Peru. ~. so SS web oieta aoe Se Eee 47 46 » 
P. SUPERCILIARIS Lawrence 
260 ad. Lion Hill, Panama R. R., Topotypes of P. superciliaris . . 45,48 42 mm. 
rite) cialis MGereEN(Gittseh 5 GS Gt a eS ous Go Ga 6 8 a < 51 46 » 
TiC Ano AGM TE LG ates weap tae er ec yore Co So 44 » 
1s) Hels EyoN MLE MWVG MOOI Gg G Bn ob = oO og S 4 3 5 48 43 » 
1G ad. | Bebedero, Costa Ricas =. = = See Mie MO ci tee et 49 44 » 
2 Gd ad. Buenos Aires, Costa Rica . tales eH 's ek Ct temic ae 48 43.44 » 
a Gada) Wataralipa, Nicaragua ec, esl ise <i een 46 41 » 
2° cad sGuatemalaig iy Ostia? faci See ee Seed, eee eee on ieee 48,5 43,44 » 
7 Oads Guatemalal © sys. ce eh as oe. ce. Se ce yur en pecans 46 43 » 
73 SMeN eval AR leialoroy (Cos atckis ky Go 6 6 Ss 2 OO So as god 6 48 2nd) 
ion ree Oy PENG NONEEH (GOREN IS Kerh Gog Gg 6. Ge gp i oS 4 c 46 40 » 
xO ads, iMataralpasy Nicarapiial jeve culties © isa) cones e epee rane 45 40,9 » 
Ti Clad: “\ChIniguile.e © wey Gems hia ieecy nic) Wot em in ens, Mek ce emer 44 41 » 
