( 18 ) 



Skins from Goyaz, Tenente Borges and Cnyabd are practically identical with 

 the type of T. g. intercedens, while the two i t? from Western Mattogrosso (Villa 

 Bella and Engeuho do Gama) are much brighter, more ocliraceons on the breast 

 and abdomen. They may represent yet another form, but in any case they are 

 different from T. g. juruanus Ih., which is much darker on the back, chestnnt- 

 rafous like the typical race. For the present, I am able to distinguish three 

 forms with black malar stripe : 



{a) T. genibarbis genibarbis Sws. Eastern Brazil from Bahia to Para, and 

 west to Borba, on the east bank of the lower Rio Madeira. 



{b) T. genibarbis juruanus Ihering. N.W. Brazil : Rio Jurmi (Garbe) ; 

 Hnmaytha, left bank of the Rio Madeira (Hoffmanns). Cf. Nov. Zool. xiv. 

 1907, "p. 345. 



(c) T. genibarbis intercedens Hellm. Interior of Brazil in the states of Goyaz 

 and Mattogrosso. Goyaz : city of Goyaz (Natterer), Faz. do Teueute Borges 

 (Natterer), Faz. Esperanea, Rio Thesouras (Baer). Mattogrosso : Cuyabd. (Natterer), 

 (Jhapada (Smith), Villa Bella de Mattogrosso, Engenho do Gama (Natterer). 



5. Trogolodytes musculus guarixa Piich. 



[Triigloili/les musculus Naumann, ViJyel Deutschl. iii. p. 724. table (1823. — Bahia).] 



Troglodytes guarixa Pucheran (ex Cuvier MS.), Arch. Mus. Paris vii. p. 338 (1855. — " Br&il," coll. 



Delalande and St. Hilaire). 

 Thryothorus wiedi Berlepach, Journ.f. Ornith. 1873. p. 231 (Blumeniu, Santa Catharina). 



Nos. 1928, 1929, 1941, 1958, 2013, 2014, 2015. d S , ? j ad., Goyaz, March, 

 April 1906.— Wing 49—55 ; tail 4U— 46 ; bill 13—14 mm. 



Nos. 1727, 1728, 1770. SS, ? ad., Faz. Esperanpa, January 1906.— Wing 52, 

 49 ; tail 45 ; bill 13J-14 mm. 



No. 1690. ? juv., Faz. Esperanra, December 1905. 



The series agrees perfectly with specimens from Rio de Janeiro, S. Paulo, 

 Minas Geraes, Santa Catharina, and Paraguay — viz. the form separated as T. triedi 

 by Count Berlepsch. 1 have, however, ascertained by examination of the types 

 in the Paris Museum that T. guarixa of Pucheran is likewise referable to this 

 race. The name was based on a specimen sent by Delalande fils from the 

 environs of Rio de Janeiro, and another obtained by A. Saint-Hilaire in Southern 

 Brazil (State of S. Paulo or Parana). Both are still in the French national 

 collection. 



T. in. musculus, which is known to me only from Baliia, is ranch richer, 

 more ochraceous on the lower parts, especially tlie flanks and under tail-coverts 

 being deep tawny. T. m. guarixa has the under-surface salmon-colour, more 

 ochraceous on flanks and crissum. An adult female (No. 2014) from Goyaz 

 is much paler beneath than all the others, nearly whitish on throat and breast, 

 and scarcely different from T. m. clarus Berl. & Hart, of Guiana and Amazonia. 



0. Geothlypis aequinoctialis cucullata (Lath.). 



[MotaciUa acquhioclialis Gmelin, Syst. Nat. 1. ii. p. 5172 (1788. — ex Daubenton, PL enl. CSi). fig. 1.— 



Cayenne).] 

 Sylvia cucullata Latham, Itid. Oru. ii. p. 528 (1700.— no locality) ; cf. Richmond, Auk, 1900. 



p. 179. 



No. 1921 (?) ad., Goyaz, March 1906. 



