500 NOVITATES ZOOLOOICAE XXIV. 1U17. 



Peru was united with it, while it is specially said that the Bolivian bird differed 

 in having yellowish ear-tufts, tliose from Peru having white ones. The bill wa.s 

 specially described as short, compared with the typical Bogota form. Now 0. T. 

 Baron collected a series of eight specimens at an elevation of 10,000 ft. near Leima- 

 bamba, and these differ strikingly from flavescens (which is supposed to be a 

 synonym of aiiritus Tsch.) in having a very long and straight bill, and a lighter 

 rump and tail, \\\\\\e the ear-tufts are really pure ^\■hite, which cannot be said, 

 in our opinion, of the type of flavescens from JNIaraynioc. The description of 

 auritiis by Tschudi seems to us to agree lietter w ith the birds from Leimabamba, 

 especially the length of the bill. 



All our Ecuadorian skins, collected by Goodfellow and Hamilton, differ 

 from the Peruvian ones in having pure white throats, and not the light tail of 

 the birds from Leimabamba, while they differ from the Bogota ones in their 

 much darker chestnut tails. 



To decide about these forms it will be necessary to examine Tschudi's type 

 and more material from Central Peru and Bolivia. Ta\o specimens from Bolivia 

 in the British Museum agree with our cotype of flavescens. 



Note on Philydor erythrocercus. 



Arranging our specimens of Philydor erythrocercus we find that there are 

 three distinct groups, evidently representing three different subspecies. 



The skins from Caycmie (Cherrie coll.) are slightly more olivaceous on the 

 upperside, the rufous patch on the lesser upper wing-coverts hardly traceable, 

 the outer edges of the outer webs of the primaries olive without any rufous tinge 

 whatever. Bill slender, length from nostril to tip in males 12'5-13, females 12 mm. 

 These birds agree perfectly with one of Pelzeln's original specimens collected by 

 Natterer on the upjier Rio Negro. Therefore these birds must be called 



Philydor erythrocercus erythrocercus. 



Specimens from Paia, collected by Wallace, Steerc, Robert, and Hoffmanns, 

 differ at a glance by having the outer webs to the primaries lighter and with a 

 conspicuous rufous tinge, the whole upperside less olivaceous, the rufous patch 

 on the lesser upper wing-coverts more conspicuous, except in juvenile birds. 

 The bill is of the same shape as in the Cayenne birds. 



One male and four females from Calama on the Rio ]\ladeii'a, collected by 

 W. Hoffmanns in 1907 agree in coloration with the Para, birds, but the bills 

 are thicker and less elongated, not so slender, measuring from the nostril 10 to 

 11 (5 mm. 



George K. Cherrie, Bull. Am. Mus. Nat. Hist. xxxv. p. ISO, 1916, described 

 a new subspecies which he called 



Philydor erythrocercus lyra 



from the '• Rio Roosevelt," Matto Grosso, from a single female. Measui-ement 

 of bill not given. This new form seems to agree with our birds from Para and 

 Rio Madeira in coloration, and must be either of thom, if they are different sub- 

 species, which seems to us evident, but should be confirmed by bigger series. 



It may be added that in this species the males are larger than the females, 

 thb wing of the latter being about half a centimetre shortter. 



