48 BULLETIN 117, UNITED STATES NATIONAL MUSEUM. 



Order RALLIFORMES. 



Family RALLIDAE. 



RAILS, GALLINULES, COOTS. 



C221) PARDIRALLUS RYTIRHYNCHUS RYTIRHYNCHUS (Vieillot). 



Rallus rytirhynchus Vieillot, Nouv. Diet. d'Hist. Nat., vol. 28, 1819, p. 549 



(Paraguay). 

 Pardirallus rytirhynchus rytirhynchus Bangs and Noble, Auk, 1918, p. 446 (Huan- 



cabamba, Peru). 

 Pardirallus rityrhynchus tschudii Chubb, Ibis, 1919, p. 50 (central Peru; type from 



Lake Junin). 



An excellent series of 19 specimens from northern Argentina, which 

 may be considered as doubtless typically representing this species, 

 shows some interesting differences in coloration and indicates that 

 recently proposed forms of this species are apparently based on 

 individual rather than racial variation. The dorsal surface in these 

 specimens varies from plain, uniform olive-brown of varying shades, 

 to essentially the same or somewhat paler color mottled v.ith blackish, 

 especially posteriorly. This blackish mottling is largely due to a 

 wearing away of the tips of the feathers which exposes their blackish 

 bases, but it is also individual, since some worn specimens, which 

 are at the beginning of the postnuptial molt, do not exhibit it. The 

 same range of variation is shown in five specimens from the Tem- 

 perate Zone of Peru (including three from Lake Junin, type locality 

 of P. r. tschudii Chubb). These specimens are somewhat larger than 

 those from Argentina, but the difference is not in my opinion suffi- 

 ciently pronounced to be of diagnostic value. 



La Raya, 1; Galea, I. 



(231) ARAMIDES CAJANEA CHIRICOTE (Vieillot). 



Rallus chiricote Vieillot, Nouv. Diet. d'Hist. Nat., vol. 28, 1819, p. 551 (Para- 

 guay). 



A species of the Tropical Zone. Our specimen agrees with seven 

 from Matto Grosso, Brazil. 

 Rio Comberciato, 1. 



(252) CRECISCUS VIRIDIS FACIALIS (Tschudi). 



Crex facialis Tschudi, Arch, fiir Naturg., 1843, p. 388 ("in sylvis peruanis cali- 



dris"). 

 Creciscus viridis facialis Berlepsch and Stolzmann, Ornis, 1906, p. 102 (Santa 



Ana). 



(256) GALLINULA GALEATA GARMANI Allen. 



Gallinula garmani Allen, Bull. Mus. Comp. Zool., 1876, p. 357 (Lake Titicaca). 



A Puna Zone representative of this wide-ranging species. 

 Galea, 1. 



