1904.] NATUKAL SaENCES OF PHILADELPHIA. 46 1 



The measurements of five adult males are as below: 



This new race differs from D. olivacea lafresnayei in its decidedly 

 more rufescent coloration both above and below; less ashy chin and 

 cheeks, the former more uniform ^nth the breast ; and less olivaceous 

 upper sm-face of the wings. It is much more rufescent throughout than 

 D. olivacea phceochroa, with the chin not conspicuously different from 

 the rest of the lower parts. 



Specimens from Venezuela are apparently like the type ; but a con- 

 siderable series from Trinidad exhibits some individual color variations, 

 while as a whole it is intermediate between aphanta and meruloides , 

 though decidedly nearer the former. 



Dendrocincia ruficeps (Sclater and Salvin). 



Dendrocincla ruficeps Sclater and Salvin, Proc. Zool. Soc. Lond., 1868, p. 54. 



Type Locality. — Panama City, Panama. 



Geographical Distribution. — Panama. 



Resembles D. meruloides meruloides, but is much darker throughout, 

 particularly on the abdomen; the chin, however, is lighter, and de- 

 cidedly contrasted with the breast ; sides of head more rufescent ; the 

 pileum still more so, and conspicuously different from the distinctly 

 olivaceous back. 



A very satisfactory series of eleven specimens of D. ruficeps, while it 

 evidences considerable individual difference in color, yet appears to 

 establish beyond reasonable doubt the validity of the species; for none 

 of these examples are so reddish on the back, rump, and lower surface 

 as either homochroa or acedesta. Wlien Mr. Ridgway wrote^^ he had 

 no specimens of real ruficeps, and all the birds referred by him to this 

 form, and upon which he predicated its subspecific relationship with 

 D. homochroa, prove to belong ^dthout doubt to Dendrocincla homochroa 

 acedesta. The localities from which specimens have been examined 



' Proc. U. S. Nat. Mus., X, 1888, p. 491. 



