18 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



matching the basal part of the tail; bill JDrownish; tarsi and feet 

 pale (in skin). 



Juvenal plumage (No, 44,339, Collection Field Museum of Natural 

 History; Moyobamba, Peru, July 18) : above, including pileum, dull 

 dark brown (near sepia) ; wings and tail as in the adult, but upper 

 tail-coverts more rusty buff; throat and breast Saccardo's umber, 

 passing into dull butfy posteriorly. 



Measurement s. — Male: Wing, Cl-67 (average, 64.5); tail, 46-54 



(50) ; bill, 11-12 (11.5) ; tarsus, 20-22 (21.2). Female: Wing, 58-07 



(61.65) ; tail, 47-51 (49) ; bill, 10.5-12 (11.2) ; tarsus, 19.5-21.5 



(20.5.). 

 Range. — From eastern Ecuador and northeastern Peru eastward 



(south of the Amazon) to the Rio Madeira. 



Retnarhs.- — Most of the references to this species in the literature 

 appear under Sclater's name uropyglaUs^ applied in 1861 to a bird 

 supposed to have come from Brazil. Later on Sclater examined 

 some specimens from Panama which he thought were the same, and 

 altered the type localit}^ accordingly. But it appears as if the origi- 

 nal designation were Correct, if we understand by " Brazil " the 

 upper Amazon. Most of the records, it is true, come from beyond 

 the limits of that country, in eastern Ecuador and Peru. The late 

 Count von Berlepsch wa^ the first to suspect that the Muscica'pa 

 fidvicauda of Spix was an earlier name for the same species, and 

 his suspicions were confirmed by Doctor Hellmayr's examination 

 of the type in the Munich Museum. Spix's figure is far from good, 

 not showing the buffy superciliaries at all, but is easily recognizable 

 by reason of the characteristic color pattern of the tail. He speci- 

 fies no particular locality for his type, but it must have come from 

 some point on the Rio Solimoes, and in order to get a definite basis 

 for the nomenclature I propose to fix Sao Paulo de Oliveni^a as 

 the type locality, on the strength of specimens from this place in 

 the collection of the Carnegie Museum, and of the circumstance that 

 Spix is known to have collected here. A small series from the 

 Rio Purus are not different, and specimens from eastern Ecuador 

 are also the same. Four skins from Moyobamba, Peru, are clearly 

 referable here, and on this account I place all the records for this 

 part of Peru under the present heading. Doctor Hellmayr refers 

 a single skin from Calama, Rio Madeira, to semicervhm, although 

 indicating certain difference's between it and specimens of that 

 form from western Ecuador. These are all confirmed by our series, 

 which are readily distinguishable from Colombian birds by their 

 whiter under parts and more extensive and more greenish dark 

 tipping of the rectrices, with the colored part less sharply defined. 



The record of this form from Yahuarmayo, southeastern Peru, 

 requires confirmation, since all the skins from that region seen 



