54 BROOKS — A CLAPPER RAIL Tv^i/Vaf " 



margins are wider and of a bluish cast, giving the back a Ughter and more 

 bhie appearance than in other members of the genus. 



Description. — Feathers of upper parts oHve brown with bluish gray 

 margins; rectrices with narrow olive brown centers, shading to neutral color 

 on the margins; wings brown; outer web of first primaries lighter; the upper 

 wing coverts with irregular buff-colored patches; under wing coverts dark 

 brown with narrow white bars; crown and nape darker than back, with 

 very little streaking; sides of the head and neck bluish gray, as on the mar- 

 gins of the back feathers; suborbital spot and supraloral streak white, 

 washed with buff; upper throat white; lower throat and upper breast buff; 

 belly dull white, the sides dark brown barred with white; under tail coverts 

 with spots and bars of black. 



MEASUREMENTS (in miUitneters) 



Mr. Paul Bartsch recently has used the name Rallus longi- 

 rostris helius for the clapper rails of this general region. As 

 this name appears to rest on no description, but to be purely 

 a nemen nudum, it must be disregarded. 



