( 71 ) 



tail ") and M. pijrrhonota (with the whole back rnfous chestnut and with " a shorter 

 tail ") are merely young and adult of a single form. As will be seen from the 

 measurements given below, there is no difference in the length of the tail between 

 Peruvian examples (haematonota) and those from more eastern localities when series 

 of both are compared. Thus, we have only to deal with the other supposed 

 characters — viz. the intensity and the extent of the rufous colour on the back, and 

 the coloration of the apical spots on the upper wing-coverts. 



The Tring Museum possesses a very instructive series from the Cauva River, 

 Venezuela. On comparing these ten specimens we find that the fully adult S S have 

 the whole back and rump deep chestnut rufous, and the apical spots on all the upper 

 wing-coverts pure white,* while in immature birds the rufous is paler and coufined 

 to the upper back (the rump being brown) and the wing spots are always buff or 

 fulvous. Those with the least amount of rufous on the back and with bright 

 fulvous spots on the wing-coverts are undoubtedly the youngest, as is proved by the 

 fluffy texture of the feathers. The type of F. haematonota (from Chamicnros) is a 

 young bird, and agrees in colour and size perfectly with several of our Caura 

 specimens, while the two other examples of M. haematonota in the British Museum 

 are even younger, there being but a slight rufous admixture in the middle of the 

 back. On the other hand, a nearly adult S from north-east Peru in the Paris 

 Museum, collected by Count Casteluau, has the wing spots (except on the greater 

 series) white and the whole back deep chestnut rnfous, just like the type of 

 M. pyrrhonota from Marabitanas ! The type of M. p. amazonica kindly lent by 

 Prof, von Ihering is absolutely identical with several skins from the Caura. 



I cannot find any constant difference between ? ? from Peru, Marabitauas, 



Venezuela, etc., either in size or in colour. 



Measurements : 



Wing. Tail. 



3 cf S ad., Marabitanas (including the type 

 of M. pyrrhonota) . . . .47 —49 ; 35—37 mm. 



1 3 ad., Sta. Barbara, Rio Negro . 

 1 S imm., Borba, Rio Madeira 



4 <$S, Nericagua and Mnndnapo, Orinoco 

 7 SS, Caura River, Venezuela 

 1 S, Rio Jnruii (type of M. p. ama zonica 



Ihering) . . . . . . 49J ; 30 



3 $$ jr., Chamicnros and Chyavetas, 



North Peru (including the type of 



F. haemotonota Scl.) ... 51 —53 ; 37, 38, 41 „ 



1 c? ad., N.E. Peru (Casteluau coll., 



Mus. Paris 50 ; 35£ „ 



72. Gymnopithys salvini (Berl.) 



Pithya salvini Berlepsch, Journ. fur Ornith. 1901. p. 98 (S. Mateo, N. Bolivia); Ihering, Revist. 

 Mus. Paul. vi. p. 443, tab. xvi. fig. 2 (1905.— Rio Juriui). 



No. 089. S ad., 22. v. 06. " Iris greyish browu, feet bluish black, bill black." 

 —Wing 75 ; tail 45 ; tars. 231 ; bill damaged. 



No. 069. 6 imm., 20. v. 06. " Iris dark brown, feet bine-grey, bill black." 

 —Wing 74 ; tail 47 ; tars._25 ; bill 17i mm. 



* Only a few on the greater scries are very slightly tinged with buff.. 



