( 310 ) 



Besides the type in the Paris Maaeum, I examined two c? J in the Trinj; 

 Musenm and one c? ad. in Count Berlejjsch's collection. All were taken at Lagnuita, 

 Tucuman, at an elevation of 3000 metres, January 31, February 1, 4, 5, 19U3. They 

 present the following measurements: Wing 70 to 77i ; tail 74 to 75|; bill 

 13i to 14i mm. 



0. Tachyphoniis chloricterus Vieill. should be Orthogonys chloricterus (Vieill.) 



Tachi/pliuniis cJilorirtertis Vieillot, Xduv. Diet, xxxii (1819) p. ,'ifiO ["on le trouve au Bn'sil d'oii U a 



ete apportt' par M. de Lalande fils"] ; Vieillot, Tahl. em: melh. Oniilh. ii.(182'2)p. 804 [" dvposd 



au Museum d'histoire naturelle "]. 

 " Twhi/phom a qnudettes bleues" Lesson, Traile d'Orn. (1831) p. 463 [part.: " Femelle : olive 



jaunCitre. Du Bresil"] ; Pucheran, Arch. Mm. vii (18.'j5i p. 378. 

 Tamigru virirlii SpLx, Ac. Brasil. ii. (1825) p. 36 tab. XI.VJII. fig. 2 [" in provincia Rio de Janeiro"— 



type in Munich Museum examined]. 

 Orthof/oni/ft vh'idi.'< auct. 



Mns. Paris ; spec, typ., labelled as follows : " Ln.mprote icterope ? , Piji-iMiija 

 ictei-opus Vii'ill. Tacki/phonu-i chloricfenis Vieill. (T.),ilu Bn'sil, par Delala/^i/.f" 

 and on the bottom of the perch: '^ du Brcsil par Delalaudc 1816. Tachyphonus 

 chloricterus Vieill. (type)." — Wing 92 ; tail 84 ; bill 19 mm. 



This specimen agrees perfectly with an example of Orthogonys viridis (Spix) 

 from Parana, with which I compared it. The lower surfiice is perhaps rather paler 

 olive yellow and the back duller greenish, both diftereuces being without doubt due 

 to fading, for the specimen was exposed to light since nearly a century. 



Vieillot's name, being the earliest, must be accepted for the species commonly 

 called 0. viridis. 



In the Cat. Birds xi. p. 193 it was doubtfully referred to the ? of Cyanictcrus 

 cyanicterus (Vieill.). 



7. Nemosia chrysopis Sd. & Salv. = Thlypopsis sordida (Lafr. k Orb.) juv. ! 



Nemosia sordida Lafresnaye & Orbigny, Si^ii. Ac, i. in : Mar/. Zoo!, cl. ii. (1837) p. 28 [Yuracares, 



rep. Boliviana]. 

 .V. chri/sopis Sclater & Salvin, P. Z. S. 1880. p. 155 [Sarayayu, E. Ecuador]. 



Spec. typ. in Mns. Brit. : " Sarayaiju, E. Ecuador.— 0. Buckley coll. Type— 

 Nemosia chrysopis Sol. & Salv." — Wing 66 ; tail :j7 ; bill 11 J mm. 



The type is an immature bird of T. sordida in the well-known juvenile 

 dress, as descrilied and accurately figured by D'Orbigny,* and it is difficult to 

 understand liow it could be mistaken for "a very distinct species of the section 

 Thlypopsis." The Tring Mnseum possesses a specimen in corresponding plumage 

 from Altagriuiii, Orinoco, and I have seen others from Bahia in Count Berlepsch's 

 collection. U'Orbigny's types from Yuracares, which I examined in the Paris 

 Museum, are also immature, one being exactly like the typical specimen of 

 N. chrysopis, the other even younger, in the fluffy plumage of the nestling. 



In both, the type of N. chrysopis and the older specimen of D'Orbigny's, some 

 of the feathers of the adult plumage are just coming out, so several orango-rnfous 

 ones on the jiilenm, and some creamy-buff ones on the foreneck. Tiie tail-feathers 

 are slightly pointed — an unmistakable sign of immaturity. The top of the head and 

 mantle are yellowish-green as in the juvenile jdnmage, but rump and upper tail- 

 coverts have already attained the olive-grey colour of tlie adults; as in the latter, 



* Voij. Avier. tncr/d. OU. tab. IS, fig, 2. 



