( 315 ) 

 [153. Attila brasiliensis brasiliensis Less. 



AUila brasiliensis Lesson, Traite d'Oni. livr. .'). p. 3G0 (end of 1830. — " Bresil," errore ! the type is 

 from Cayenne ; cf. Pucheran, Airli. .l/«s. P,iris vii. 1S.55. p. ?i(iC,) ; Hellmayr, Nm; Znul. xiii. 

 I'JDG. pp. .'!28-30 (crit.). 



Dati/:r/iJiiila iirvpygiidis Cabanis in S=lioml)tirgIc, lieiini in Bril. dniami iii. p. ri.Sl'i (I81.'<. — British 

 Guiana). 



Altila tirnpygialis Pelzeln, Zki- Orii. Bras. ii. p. flf! (Salto do Girao). 



Left bank of Madeira : Salto do Girao (Xatterer). 



The specimen obtained by Natterer is perfectly similar to russet-backed examples 

 from Brit. Guiana and the Canra Valley. Lately I have been enabled to examine 

 Cabanis' tyj)e of D. uropijgialis (cf. I.e. p. 328), and found it to be a young bird 

 of the present species, with the back dull russet-brown, large rufescent margins to 

 the wing-coverts, etc.] 



[154. Attila spadiceus rufigularis Pelz. 



Miisrirapa spmlieeit Gmelin, Sunt. Nat. 1. ii. p. 937 (1788.— based on '■ Yellow-rumped Flycatcher," 



Latham, Gen. Si/n. Binh 2. i. p. .3.54 : Cayenne).] 

 Altila riifii/u/ai-ii Poizehi, Z:ir Orn. Bra':, ii. pp. 9f,, 170 (18G8.— Salto do Girao). 



Left bank : Salto do Girao (Natterer). 



The type, an immature bird, is still the only known specimen. It is most 

 closely related to A. s. spadiceus, but the throat and sides of the head are of a 

 much clearer and brighter ferruginons (withont any brownish admixture), the 

 axillaries and under wing-coverts lighter ochraccous, and the middle of the 

 abdomen is more extensively white. A good series from the Rio Madeira is 

 required to establish the claims of this form to recognition. 



Moreover, I must confess that I have strong doubts about ^4. brasiliensis and 

 ^1. spadiceus being specifically distinct, and should not be surprised if they should 

 turn out to be merely phases of the same form !] 



[155. Attila thamnophiloides (Spix). 



Muxciriipa IhamnitphihiideH 8\>W, Ar. Bras. ii. [i. I'.l. pi. xxvi. fig. 2 (1825. — "in locis sylvaticis 



fl. Amizonum "). 

 Attila thamnophiloides Pelzeln, I.e. p. 9,1 (Borba) ; Hellmayr, Nur. Zuol. xiv. 1907. p. 3ii4 (Borba). 



Right bank : Borba (Natterer, Hoffmanns).] 



[156. Attila bolivianus nattereri Hellm. 



Altila nattereri Hellmayr, Verhandl. Zool. But. Geselhch. ^\'ial Iii. p. 9o (1902.— Borba, Rio 



Madeira). 

 A. bolivianus (nee Lafresnaye) Pelzeln, I.e. p. 96 (Borba, Pard). 



Right bank : Borba (Natterer). Not obtained by Mr. Hoffmanns. 



^1. b. nattereri differs from A. b. bolicianus by its considerably darker coloration 

 and smaller size. The distinguishing characters are fully given I.e. : cf. also my 

 remarks in Nov. Zool. xiii. 190G. p. 33(1. Miss Snethlage has lately sent, for 

 my inspection, two males taken at Monte Alogre, Lower Amazons, which agree 

 perfectly with the types in the Vienna Museum. The range of the two races 

 is as follows : — 



