4.RT. 7 EEVISION OF THE GENUS BASILEUTERUS TODD 23 



the pileiim like the back, the buffy sides of the head merely indicated ; 

 the throat and breast are also dull brownish. 



Measurements. — Male: Wing, 59-64 (average, 62.5); tail, 52-56 

 (55) ; bill, 12-13 (12.5) ; tarsus, 21.5-23 (22.5). Female: Wing, 58-62 

 (60) ; tail, 49-55 (52.5) ; bill, 11-12 (11.5) ; tarsus, 20-22 (21). 



Range. — From eastern Venezuela (Rio Caura) through the Gui- 

 anas to northern Brazil (Rio Branco, Rio Tapajoz, and the Para 

 region). 



Remarks. — This species appears to be very imperfectly known, few 

 specimens, indeed, being extant outside of the series of 26 skins 

 in the Carnegie Museum. It was described by Sclater from a single 

 specimen collected in British Guiana, and has since been traced west- 

 ward to the Orinoco Delta and the Caura River in Venezuela, and 

 southward through French Guiana to the Para district of Brazil, on 

 the south bank of the Amazon. More recently Messrs. Anderson and 

 Becker have sent specimens to the Field Museum from the Rio 

 Branco, while Mr. Klages secured a good series in French Guiana, 

 and a few also from the Rio Tapajoz, He writes that it is " foimd 

 in pairs, generally about the borders of the forest in the heavily 

 timbered and hilly interior, but is not very numerous." On the label 

 of the specimen from the Manimo River, Orinoco Delta, % is called 

 a "water thrush." On the score of coloration alone, the species 

 appears to be related on the one hand to the members of the genus 

 PJiaeothlypis., and on the other to the more typical BasileuteH 

 through B. holivianus and B. Hvidaris. Several individuals, indeed, 

 show traces of a buffy median vertical stripe developed on the fore- 

 head. The gray of the pileum varies somewhat according to season, 

 and may average a little duller in females. 



Specimens examined. — Venezuela : Isla de Morocotico, Manimo 

 River, 1. British Guiana: Mannehaha Creek, 18 miles up Potaro 

 Road, 3 ; Rockstone, Essequibo River, 1 ; Tumatumari, Potaro River, 

 2. French Guiana: Tamanoir, 11; Pied Saut, 11. Brazil: Serra 

 Granda, Rio Branco, 1 ; Serra da Lua, Boa Vista, 1 ; Conceicao, Rio 

 Branco, 1; Benevides, 1; Colonia do Mojuy, 2; Villa Braga, 1. Un- 

 specified, 2. Total, 37. 



BASILEUTERUS BOLIVIANUS Sharpe 



Basile uterus mesoleuciis (not of Sclater, 1865) Sclater and Salvin, Proc. 



Zool. Soc. London, 1879, p. 594 (Yuyo, Bolivia). 

 Basilcuterus 'bolimanus Shakpe, Cat. Birds Brit. Mus., vol. 10, 1885, p. 402 



(Yuyo, Bolivia, orig. descr. ; type in coll. Brit. Mus.). 



Description. — Pileum deep neutral gray, passing into olive citrine 

 on the back, and this brightening into buffy citrine or old gold on 

 the upper tail-coverts; tail similar but duller; wings dusky, with 

 dark citrine outer margins, very narrow on the primaries; short 



