24 PROCEEDINGS OF THE XATIOXAL MUSEUM vol. 74 



superciliaries and subocular spot light buff, separated from each 

 other by a grayish transocular stripe; chin and sides of the head 

 tinged with buffy ; under parts white, more or less washed with light 

 bulF, especially on the breast, sides, and crissum ; under wing-coverts 

 washed with citrine ; " iris brown ; bill black ; feet light yellowish 

 brown." 



Measurements. — Male (six specimens) : Wing, G5-70 (average, 67) ; 

 tail, 51-57 (53); bill, 11-13 (12); tarsus, 20.5-22.5 (21). Female 

 (seven specimens) : Wing, 62-68 (65) ; tail, 50-54 (52) ; bill. 11-12 

 (11.5); tarsus, 21-21.5 (21). 



Range. — Eastern foothills of the Andes, Bolivia. 



Remarks. — This species greatly resembles B. viesolettcus, but the 

 upper parts are duller olive green; the pileum is paler gray; the 

 superciliaries and sides of the head are much paler buffy, without 

 any rufescent shade; the under part.s, too, have less buffy wash; 

 the wing is longer in proportion; and the bill is slenderer. These 

 differences impress one as being of specific value upon comparison, 

 while the known range of the present form is widely se])arated from 

 that of B. tnesoleucuSy affording no chance for intergradation. If 

 anything, B. holivianus is rather nearer in its characters to B. 

 rivularis. 



The characters assigned by Sharpe in his description do not fit 

 the present series at all, and there is naturally some question as to 

 the pertinence of his name. I assume that the " rufescent throat " 

 to which he refers denotes immaturity. The " absence of rufous edg- 

 ings to the wing-coverts " is of no significance, at any rate. There 

 is of course the possibility that the birds from the Santa Cruz 

 region of Bolivia may not be the same as those from the La Paz 

 district, in which case the former would require a new name. 

 Comparison with topotypical material is most desirable, but mean- 

 while it may be well to accept the name holivianus on the basis above 

 indicated. 



Specimens examined. — Bolivia : Juntas, 1 ; Tres Arroj'as, Rio 

 Espirito Santo, 1; Rio Surutu, 1 : Rio Yapacani, 1; Cerro del Ambero, 

 1; Cerro Hosane, 7; Vermejo (3,500 feet), Santa Cruz, 2. Total, 14. 



BASILEUTERUS RIVULARIS (Wicd) 



Muscicapa rivularis Wied, Reise nacb Brasilieu, vol. 2, 1821, p. 103 (Rio 

 Belinoute, Bahia, Brazil ; orig. descr. ; types in coll. Amer. Mus. Nat. 

 Hist.) ; Beitrage Natiirg. Brasilien, vol. 3, pt. 2, 1831, p. 7S9, exol. Vieillot 

 ref. (Rio Belmonte aud Rio Ilh^os, Bahia, Brazil; descr.; habits). 



Muscicapa stragulata Lichtenstein, Verz. Doubl., 1823, p. 55 (SJlo Paulo, 

 Brazil; orij;. descr.; type in Berlin Mus.). 



