BIRDS OF NORTH AND MIDDLE AMERICA. 195 
Adult female —Length (skins), 126-136 (130); wing, 48.5-51 (49.9); 
tail, 60-67.5 (62.9); culmen, 11-12.5 (11.7); tarsus, 17.5-19 (18.5); 
middle toe, 13.¢ 
Southwestern Costa Rica (Buenos Aires; Boruca, Paso Real, and Bar- 
ranca, Boruca; Térraba); western Panama (Santa Fé de Verégua) ?? 
Synallaxis albescens (not of Temminck) Satvin, Proc. Zool. Soc. Lond., 1867, 143 
(Santa Fe de Verégua, Panama; crit.)—Sciarer, Proc. Zool. Soc. Lond., 
1874, 9, part (Verdgua; monogr.); Cat. Birds Brit. Mus., xv, 1890, 43, part 
(Santa Fe de Verigua)—Satvin and Gopmay, Biol. Centr.-Am., Aves, ii, 
1891, 147, part (Santa Fé de Verdgua).—CueErriz, Expl. Zool. Merid. Costa 
Rica, 1893, 38 (Térraba and Buenos Aires, s. w. Costa Rica). 
[Synallavis] albescens Scuater and Savin, Nom. Av. Neotr., 1873, 63, part.— 
Sarre, Hand-list, iii, 1901, 54, part (Panamd). 
Synallaxis albescens latitabunda Banas, Auk, xxiv, July, 1907, 298 (Boruca, s. w. 
Costa Rica; coll. E. A. and O. Bangs).—Carriker, Ann. Carnegie Mus., vi, 
1910, 634 (8. w. Costa Rica; habits). 
SYNALLAXIS ALBESCENS HYPOLEUCA Ridgway. 
WHITE-BREASTED SYNALLAKIS. 
Similar to 8. a. latitabunda but under parts (including chest) nearly 
pure white (only the upper portion and sides of chest very faintly 
shaded with pale brownish gray, passing into pale buffy brown or 
light wood brown on sides and flanks and pale brownish buff on 
under tail-coverts); general color of upper parts lighter and more 
buffy brown. 
a Four specimens. 
: ; : Cul- Middle 
Locality. Wing. | Tail. et: Tarsus. oe: 
MALES. 
Eight adult males from Costa Rica_...........22...222222--2-5 52, 2 68.5 11.7 18.9 12. 9 
Nine adult males (S. a. albigularis) from Colombia on 56.3 74,3 11.7 19.3 14.1 
Five adult males (8. a. albigularis) from Venezuela........-..- 56. 4 74.9 12,2 19.7 13.8 
Nine adult males (8. a. albigularis) from Trinidad............. 55.3 70 12.4 19.6 13.6 
Two adult males (S. a. nesiotis) from Margarita Island, Vene- 
110) Ce 54 69.7 12.2 18.2 13.2 
One adult male (S. a. albescens) from Argentina............... 53.5 68.5 11 18 11.5 
FEMALES. 
Four adult females from Costa Rica........2..--.--22-2- eee ee 49.9 62.9 11.7 18.5 13 
Five adult females (S. @. albigularis) from Colombia........... 55 68.8 11.7 19.3 13.7 
Two adult females (S. a. albigularis) from Venezuela........... 53.2 66.5 12.2 19.2 13.5 
Three adult females (S. a. albiguleris) from Trinidad........... 53.3 69.5 12.7 19 14.2 
One adult female (8. a. albigularis?) from British Guiana ..... 57 77 13 19.5 13.5 
One adult female (9. a. nesiotis) from Margarita Island ........ 55 73.5 12.5 19 14.5 
+ No Panam4 specimens seen by me. 
