% 



EEVISION OF THE CLAPPER KAILS OBERHOLSER 321 



specimens examined indicate that there are at least two color phases 

 in this subspecies. One specimen from Guiana is exceedingly pale 

 below and above; in general appearance very close to Rallus longirostris 

 crepitans; and the feathers of the upper parts have very inconspicuous 

 centers. A dark phase is represented by birds from Cayenne and 

 another from Guiana, both of wliich are more deeply cinnamomeous 

 below, as well as darker above. 



Specimens have been examined as follows: 



Brazil: Mangunga Island, Maranhao. 



British Guiana: Demarara. 



French Guiana: Cayenne. 



Guiana: (Without specific locaUty.) 



RALLUS LONGIROSTRIS CRASSIROSTRIS Lawrence 



Brazilian Clapper Rail 



R[allus]. crassirostris Lawrence, Ann. Lye. Nat. Hist. New York, vol. 10, p 19 

 (in text), Feb. to Mar. 1871 ("Baiiia" [Brazil]). 



Subspecific characters.— SiunlsiT to Rallus longirostris longirostris, 

 but bill thicker, upper parts darker, more brownish; sides of head 

 more brownish; anterior under surface much darker, more cinnamo- 

 meous; and the wliite bars on flanks much narrower. 



Measurements.— Adult, probable male ^: Wing, 138 mm; tail, 52; 

 exposed culmen, 52.5; height of bill at base, 15; tarsus, 40.5; middle 

 toe without claw, 46. 



Type locality. — Bahia, Brazil. 



Geographic distribution. — Permanent resident in central eastern 

 Brazil, south to southeastern Brazil. 



Remarks. — The only specimen certainly of this race examined is 

 the type from Bahia, Brazil, which is no. 45660 of the American 

 Museum of Natural History bird collection. It obviously represents, 

 however, a subspecies distinct from the typical form of the species, 

 wliich inhabits the Gidanas and northeastern Brazil. 



RALLUS LONGIROSTRIS CYPERETI Taczanow.ski 



Peruvian Clapper Rail 



Rallus cypereti Taczanowski (Stolzmann MS.), Proc. Zool. Soc. London, 1877, 

 p. 747, Apr. 1878 ("Santa Luzia", near Tumbez, northwestern Peru). 



Subspecific characters. — Similar to Rallus longirostris longirostris 

 but much smaller, with a shorter and slenderer biU; sides of head 

 more brownish (less grayish); anterior lower parts of a brighter, some- 

 what darker cinnamon ; and white bars on sides and flanks narrower. 

 Similar to Rallus longirostris crassirostris but smaller; bill much 

 slenderer; above lighter, more grayish; anterior lower parts of a 

 lighter, rather brighter cinnamon; and the white bars on sides and 

 flanks broader. 



9 One specimen from Brazil, the type. 

 127716—37—2 



