558 Bulletin American Museum of Natural History. [Vol. XXXVI, 



spots, or streaks, and the sides white. Specimens from San Jose and Cis- 

 neros are intermediate but on the whole are nearer to the southern form, 

 while those from Noanama and northward are all referable to aurita. Three, 

 of them have the rump only lightly tipped with grayish, a condition shown 

 by only one of the more southern birds. So far as it goes, therefore, this 

 series indicates normal geographic intergradation. 



Dabeiba, 1; Quibdo, 2; Bagado, 1; No vita, 3; Noanama, 3. 



(3759) Sporophila aurita ophthalmica (Hellm.). 



Spermophila aurita Sol., P. Z. S., 1860, p. 276 (Babahoyo, w. Ecuador). 

 Sporoph'Ia ophthalmica Hellm., P. Z. S., 1911, p. 1098 (R. Calima; Guineo; 

 Sipi). 



As remarked under the preceding species, specimens from San Jose and 

 Cisneros, while intermediate, seem referable to this race rather than to aurita, 

 while those from Barbacoas and Tumaco are fairly typical of ophthalmica (14 

 males) though the white patch at the base of the primaries averages smaller. 



San Jose, 3; Los Cisneros, 4; Tumaco, 4; Barbacoas, 6. 



(3759a) Sporophila aurita murallse Chapm. 



Sporophila aurita muraUce Chapm., Bull. A. M. N. H., Vol. XXXIV, 1915, p. 649 

 (La Morelia, Caquetd, Col.). 



Char, suhsp. — Most nearly related to S. a. ophthalmica but larger throughout, the 

 black breast-band averaging narrower (nearly incomplete in one specimen), sides 

 grayer, white patch at base of primaries smaller, lesser wing-coverts narrowly tipped 

 with white, greater ones less frequently with white near the end of shaft. 



Found by us only in Amazonian Colombia where it is separated from its 

 nearest relative by the Andean system. 

 La Morelia, 3. 



(3764) Sporophila gutturalis {lAoht.). 



Fringilla gutturalis Light., Verz. Doubl., 1823, p. 26 (San Paulo). 



Spermophila gutturalis Wtatt, Ibis, 1871, p. 328 (Ocana); Sol. & Salv., P. Z. S„ 

 1879, p. 507 (MedeUin; Envigado). 



Sporophila gutturalis Allen, Bull. A. M. N. H., XIII, 1900, p. 166 (Cacagualito; 

 Onaoa; Palomina). 



An abundant species in the Tropical Zone and with other small seed- 

 eaters following the trails and clearings into the Subtropical Zone. Three 

 males from Quetame and Buena Vista, agree in having the throat olive- 

 black and the black on the head restricted to a narrow frontal band. 



Possibly these three birds, which appear to be matiu-e, may represent 



