BIRDS FROM BRAZIL AND SOUTHERN VENEZUELA—FRIEDMANN 477 
lad. #, lim. &,1ad. 9, Venezuela, Cerro Yapacana, Upper Orinoco, March 
23-—April 19, 1981. 
With no comparative material other than a pair of adults of the 
nominate form the distinctness of argentata and naema seems more 
than subspecific but lack of the other races, especially of toddi, and 
the comments in literature prevent any decision (S. n. toddi is said 
to form a connecting link between naevia and argentata. However, 
Todd (Proc. Biol. Soc. Washington, vol. 40, 1927, p. 165) considers 
argentata a full species, writing that ‘‘the yellow feet and nearly white 
(unstriped) under parts of this form are in my opinion good specific 
characters as compared with S. naevia, in spite of the somewhat 
intermediate character of the Tapajéz race.” 
MYRMECIZA LONGIPES GRISEIPECTUS Berlepsch and Hartert: Gray-chested Antcatcher 
Myrmeciza swiansoni grisetpectus BERLEPSCH and Harrert, Nov. Zool., vol. 9, 
1902, p. 76 (Caicara, Venezuela). 
SPECIMENS COLLECTED 
3ad. @ 1ad. 9, Venezuela, Puerto Ayacucho, Rio Orinoco, May 15-20, 1931. 
The female was noted as being in breeding condition when collected. 
MYRMECIZA ATROTHORAX ATROTHORAX (Boddaert): Black-throated Antcatcher 
Formicarius atrothorazt BopDAERT, Table des planches enluminéez . . ., 1783, p. 44 
(based on “L’Alapi, de Cayenne’? Daubenton, Planches enluminées..., 
pl. 701, fig. 2: Cayenne). 
SPECIMENS COLLECTED 
lad. #, 1 ad. 9, Brazil, Cachoeira Thomaz, Rio Cauabury, October 27, 1930. 
lim. @, lim. ?, Brazil, Serra Imeri, Salto do Hud, December 8, 1930. 
8 ad. 0,3 ad. 2, Brazil, Sdo Gabriel, Rio Negro, December 31, 1930—-January 
19, 1931. 
1 ad. 9, Venezuela, Brazo Casiquiare, Raudal Corocoro, February 9, 1931. 
lim. ?, Venezuela, Brazo Casiquiare, Playa de Candela, February 10, 1931. 
1 ad. 9, Venezuela, Brazo Casiquiare, below mouth of Rio Pacila, February 
11, 1931. 
lad. 9, Venezuela, San Antonio, Upper Orinoco, March 3, 1931. 
4 ad. o&', 2 ad. 9, Venezuela, Cerro Yapacana, Upper Orinoco, March 17- 
April 26, 1931. 
One of the January males was noted as being in breeding condition 
when collected. 
These birds vary considerably in size; thus the wing length varies 
from 54.8-60.1 mm. in males, from 55—59.1 mm. in females; the tail 
from 51—57.2 mm. in males, from 51-56.2 mm. in females; the culmen 
from the base from 17.3-19 mm. in males, 16.5-19.2 mm. in females. 
MYRMECIZA DISJUNCTA Friedmann: Yapacana Antcatcher 
Myrmeciza disjuncta FRIEDMANN, Proc. Biol. Soc. Washington, vol. 58, 1945, p. 83 
(Cerro Yapacana, Upper Orinoco, Venezuela). 
SPECIMENS COLLECTED 
lim. o, lad. 2, Venezuela, Cerro Yapacana, Upper Orinoco, April 10-19, 1931. 
