( 287 ) 



a. (\'rcoiiiacr(L t-iiierasceits (8cl.). 



Fvnnii-wom ciiierasccns Sclater, 1'. Z. N. W.tl . p. 131 part (descr. part. ; ob*. et habitat : " in lipis 



fl. Napo "). 

 Ccrcomwi-a napensis Sclater, /'. Z. S. 1868. p. 572 (Rio Napo). 

 C. mipensin Sclater, Cal. Birth. Brit. .^^UK. xv. p. 265. 

 C. iinerasceiis Sclater, Crit. BiriU Brit. }rn!f. xv. p, 264 (part. ; spec, a—^f, /,, /). 



(?. (Cinereous ; no white patch on the shoulders ; upper wing-coverts 

 cinereon.s, sometimes witli sliglit nr evrii distiact white margins ; tail-feathers 

 with distinct white tips varying in length from 3 to 5 mm. (Jraduation of the 

 tail 18—^2 mm. 



Habitat. Eastern Ecuador : Rio Napo (ex Verreaux), Sarayapu (Buckley). 

 N.E. Peru: Pebas (Hanxwell). Venezuela: Munduapo, Orinoco (Cherrie), La 

 Pricion and La Union on the Canra R. (E. Andre). Brit. Gniana : Bartica Grove, 

 (-'amacusa, Ourumee (Whitely). Caijeniie : Oyapoc (ex Verdey). 



Measurements : 



The males of the above series are quite uniform, having no trace of white on 

 the shoulders. The upper wing-coverts are always clear cinereous, never black 

 as in the following species. 



On (^oiu|iariiig the types of ('. uapeiiisi.f and C. cinerascens 1 find thai the 

 tonner diti'ers only in its uniform cinereous wing-coverts, which have distinct 

 white margins in the hitter. In the series from British Gniana, however, there is 

 a complete transition between these extremes. 



No. agrees with the tyjie of C. iiajjensi.^ in having no trace of white markings ; 

 in Nos. 4 and 5 there are faint indications of white edges on some of the middle 

 and greater coverts, and No. 1~ shows distinct white margins on all iii)pcr wing- 

 coverts, hi all other respects the sujiposed species without margins agrees with 

 the uniform-winged bird. As the types of both ('. mj>rii.-<i.-< and ('. c/iieraiscen.i 

 came from the Rio Napo, there can be no longer any doubt thai liiey belong to one 



