AKT. 7 REVISION OF THE GENUS BASILEUTERUS — TODD 69 



olivascen^. In fact, I keep them with auricapilht^y mainly because 

 they resemble that form in the prominence of the head-stripes, which 

 are less distinct in viridescens, and because the series from Itatiaya 

 are also of this duller type. Formal separation would further com- 

 plicate matters, I fear, when it comes to defining the ranges of the 

 several forms. Old skins appear to be duller yellow below than 

 freshly collected ones. 



Specimens examined. — Brazil: Baturite, Ceara, 2; Jacaresinha, 1; 

 Castro, Parana, 1; Fazenda Cayoa, 1; Rio de Janeiro, 2; Therezo- 

 polis. Organ Mountains, 14; Macieiras (5,900 feet), Serra do Itatiaya, 

 5; Monte Serrat (2.900 feet), Serra do Itatiaya, 2; Ponte Maroniba 

 (3,600-3,800 feet), Serra do Itatiaya, 3; Ytarare, Sfio Paulo, 1; Sao 

 Lourenco, Rio Grande do Sul, 2; Camaquam, Rio Grande do Sul, 2. 

 Argentina: Above San Pablo (4,000 feet), Tucuman, 5; Tafi trail 

 (2,000 feet), Tucuman, 3; Sarmiento (1,700 feet), Tucuman, 1; Las 

 Palmas, Chaco, 2 ; Pto. Aguirre, 1 ; Barracas al Sur, Buenos Aires, 1. 

 Uruguay : Lazcano, 1. Paraguay : Sapucay, 2 ; Puerto Bertoni, 1 ; 

 unspecified, 1. Unspecified, 2. Total, 56. 



BASILEUTERUS AURICAPILLUS VIRIDESCENS Todd 



Muscicapa vermivora (not Motacilla vermlvora Gmelin) Lafresnaye and 



D'Orbigny, Syn. Avium, pt. 1, Mag. Zoo]., cl. ii, 1837, p. 51, part (Chiquitos, 



Bolivia). 

 Mtisicapara vermivora D'Orbigny, Voy. Am6r. Merid., Ois., 1814, p. 324, part 



("Monte grande [grande foret] que separe Sauta-Cruz de la Sierra de 



Chiquitos," Bolivia; descr. ; habits). 

 Basileutcrus vermivorus Sclater and Salvin, Proc. Zool. See. London, 1879, 



p. 594 (D'Orbigny's ref.). 

 Basileuterus aurlcapiUus viridcscens Todd, Proc. Biol. Soc. "Washington, vol. 



26, 1913, p. 170 (Buenavista, Bolivia; orig. descr.; type in coll. Carnegie 



Mus.).— Heixmayr, Nov. Zool., vol. 32, 1925, p. ISO (Santa Cruz de la 



Sierra and Chiquitos, Bolivia; crit.). 



Subspecific characters. — Similar to Basileuterus auricapillus awn- 

 capilhis, but slightly paler and duller green above, with the head- 

 stripes narrower and much less distinct, less purely black, and conse- 

 quently less prominent. 



Measurement 8. — Male (four specimens) : Wing, 60-63 (average, 

 60.5) ; tail, 50-55 (52) ; bill, 9.5-10.5 (10) ; tarsus, 18.5. Female 

 (four specimens) : Wing, 55-60 (58) ; tail, 48-52 (51) ; bill, 9.5-10 

 (9.7); tarsus, 18-18.5 (18.4). 



Range. — State of Santa Cruz, Bolivia, east of the Andes. 



Reinarks. — In describing this race it was compared with two speci- 

 mens from Paraguay in the collection of the United States National 

 Museum. With a satisfactory series of true atiricapillus now avail- 

 able from southern Brazil (Therezopolis, Itatiaya, etc.), as v>'ell as 

 additional specimens of the present race (it was originally character- 



