( 351 ) 



of the plumage rather deeper yellow, more like X. f. flwoicollis. As the geo- 

 graphical variation of this widely spread species was not well understood hitherto, 

 I take the opportunity of presenting a condensed review of the various forms into 

 which X. j/tirirolli.f may easily be divided. In addition to the fine series in the 

 Tring Museum I have studied the material in the Vienna and Berlepsch Museums, 

 as well as several important specimens in the British Museum. 



a. X . iltirirolli* jlitrifolUs. Vieill.* 



Ntmosia flavieollii Vieillot, Nouv. Dirt. xxii. p. 491 (1818. — " l'Amerique me'ridionale "). 

 .V. auricollii Sclater, P.Z.S. 1856. p. Ill (Cayenne [type] and East Peru : river Ucayali). 



Hab. Cayenne (Mns. Vindob., Brit, etc.). Venezuela: Suapure and Nicare, 

 Caura River (Andre & Klages coll.). N.W. Brazil : Marabitanas, Upper Rio Negro 

 (Natterer). Eastern Fern : Chamicuros (Hauxwell & Bartlett coll.). 



<5 ad. Size rather small, bill short and slender. Head, back, upper wing- and 

 tail-coverts dull brownish black ; rump, throat and crissuin golden yellow ; rest 

 of nnder-parts white, foreneck with more or less numerous irregular blackish 

 cross-bars. 



Obs. I am unable to find any constant differences between specimens from 

 Cayenne, ('aura It., Marabitanas and Eastern Peru. The amount of blackish cross- 

 bars on the foreneck and sides of chest varies a good deal in examples from the 

 same localities. For instance, in five adult males from the Caura the chest is 

 strongly barred, while two others from the same place show but a few dusky bands. 

 As a rule, there is no yellow supraloral streak, and the whole throat is yellow. 

 Among the specimens obtained at Marabitanas by the late Dr. Natterer, there are, 

 however, three or four in which the former is slightly indicated, and in one of them 

 the middle of the lower throat is white, thus pointing towards .X. /'. albigularis Scl. 



Material. Wing. Tail. Bill. 



1 . d ad., ( layenne (ex Becoeur, in Vienna 



Museum) 70 51 § 12 mm. 



2. S ad., Cayenne-make. Type of 



X. auricollis Scl. Brit. Mus. . 71 53J 13 „ 



3. S ad., Oyapoc, Cayenne (ex Mme 



Verdey, in Brit. Mns.) . . 65A, 

 4 — 8. J cf ad. & imm., Marabitanas, Rio 



Negro. Vienna Mus. . . 04 — 70 



9 — 13. <$<$ ad., Caura River, Venezuela. 



Tring Mus 63—66 



14 — 16. c?d ad., Chamicuros, East Pern. 



Tring & Brit. Mus. . . . 65—69 

 17,18. ¥?, Marabitanas, Rio Negro. Vienna 



Mns 58, 62 47, 50 12 „ 



19. ? ad., Chamicuros, East Peru. Tring 



Mns .03 50 12 



20,21. ??, Caura River, Venezuela. Tring 



Mns 59J, 01 40',, 18 12A 



* Tanagra sj>e<uUfera Temminck [I't. col, Livr. (J, tab. 36. fig. 1, 2 (1821. — "& la Guyane <*t an 



Bresil")] apparently covers both N. /. JlavicvUis and N, f. insigni$ t but cannot be referred with 

 certainty to either. 



