( 311 ) 



the middle of the abdomt-n and tlie under tail-covcrts are buff}' white, but the chi'st 

 and sides of the body are olive j'ellow as in j'oung birds. 



That the t3'pe of ]V. chrysopis is the young of T. sorclida and not of 

 T. s. amazonum is proved by the newly growing feathers on tlie foreneek being 

 creamy-buff', not jjure cinereous. 



The second specimen, from Santa ( 'ruz, E. Pern, referred to T. chn/iiopis by 

 Sclater,* is quite a young bird of T. s. amazoinim, the types of wliich came also 

 from the Ucayali. The range of the two forms is as follows : 



1. Thl//popsis sordida sordida (LalV. k Orb.) 



East Bolivia : Ynracares (D'Orbiguy), San Mateo (G. Garlepp. — Mus. 

 Berlepsch and Coll. Hellmayr). Brazil: Goiaz, (Juyaba, Rio Madeira (Natterer 

 coll.t), Chapada (H. H. Smith coll.). — Minas Geraes : Lagoa Santa and Sete 

 Lagoas (Burmeister & Reinhardt coll. J). — Bahia (trade skins in Mus. Berlepsch, 

 Tring, etc.). — Pernambuco (Forbes coll.) — -Venezuela, Orinoco R. : Capuchin, 

 El Fraile, Altagracia (Clierrie coll.).§ — East Ecuador : Saraya(ju (C. Buckley coll.). 



2. T. sordida amazonum Scl. 



N.E. Peru : Lower Ucayali, Santa Cruz, Nanta (E. Bartlett coll.), Pebas 

 (Hanxwell coll.). — C. Peru: La Merced, Chanchamayo (J. Kalinowski coll.). 



N.B. — The locality " Bolivia " of the Cat. B. xi. p. 220 is evidently erroneous. 



s. Arremon polionotus Bp. 



Arremon pollonotiin Bonaparte, Consp. Ae. i. (1850) p. 488 [Corrientes. — Mus. Paris]. 

 An-emon callistiis Oberholser, Proe. Biol. Sue. Wash. xiv. (1901) p. 188 [Sapucay, Paraguay]. 



One mounted sjiecimen, in the Paris Museum, is labelled : " Arremon jiolionote ; 

 Arremon polionotus Pchr., Bp. (T.) ; de (Corrientes, par M. D'Orbiguy." The stand 

 bears the following inscription : " de Corrientes, par M. D'Orbiguy, juillet 1820. 

 Type de la description de M. (Jh. Bonajiarte dans le (!onspectus Avium." — Al. TOA ; 

 Cauda 75; rostr. 14i mm. 



This specimen, an adult cJ, agrees in every respect with the original description 

 of Bonaparte, and is undoubtedly the type of the species. Two adult males from 

 Paraguay (^-1. callistus) are in no way distiuguishable, as we should have expected 

 from the locality. Most probably Mr. Oberholser, when describing his .1. callistus, 

 compared the Paraguay bird with specimens from Mattogrosso, which he seems to 

 have considered to be true .1. polionotus. Having always suspected the identity of the 

 Paraguay form with the latter, 1 took to Paris some specimens from Mattogros.so and 

 Paraguay, and found my surmise fully confirmed. The type in the Paris Museum 

 has the black jugular band just as broad as the Paraguay birds, and the back is ol' 

 the same dark slaty grey without any olivaceous tinge ; only the edge of the wing 

 is slightly more mixed with white in the tyi>e specimen. The lack of the yellowish- 

 green humeral patch upon which Mr. Oberholser lays so much stress does not seem 



* Cat. Jiirds xi. p. 229. 



t Nemosiafulvncena + X. sordida Pelzeln, Orn. Bras. iii. (ls(;<))pp. 215, 216. — I Lave examined Ihese 

 specimens. N.fnUrscem are the adults, N. sordida tlie young birds. They belong to T. s. sordida and 

 not to T. s. amazo7iuin, as supposed by Wclaler. 



t Xemnsia fiilvicejis Burmeister, Si/st. Vhers. iii. p. 1511; iV. fulvcscens + K sordida Reiuhardt, \'id. 

 Medd. Kjlihenhavn 1S70. p. -123. 



§ Nov. Zool. vs.. p. 23. 



