(71 ) 



{b) H. p. atricapillus Pelz. 



Hah. N.E. Brazil : Periiambiico (W. A. Forbes, ? iu Mas. Brit, exam.) ; 

 Go3'az : city of Go3'az (Natterer, Castehian & Deville, Baer), Faz. EsperaiKja, 

 Rio Aragnaya, Rio Thesouras (Baer). Nortliera S. Panic : Porto do Rio Parand, 

 (Natterer). Ea.sterii Bolivia : Chiquitos (D'Orbigny), Santa Cruz de la Sierra 

 (G. Garlepp, S ad. in Triug ex coll. Nehrkorn). 



7 c? c? ad. : wing 52 — .59 ; tail 54 — 57 ; bill 14i — 15| mm.- 



9 ? ? : wing 50—55 ; tail 52—58 ; bill 14J— 15 mm. 



(e) H. p. motacilloides Tacz. 



Herpsilnrhnuis motacilloides Taczanowski, P.Z.S. Loud. 1874. p. 136 (Maraynioc, Central Peru). 



IJab. (_!eutral Peru, Chanchamayo district : Maraynioc (Jelski), La Gloria' 

 Garita del >S<)I (Kalinow.ski) ; Idma : Santa Ana (Kalinowski). 

 2 cJJ ad.: wing 56, 54; tail 59, 53; bill 15 mm. 



118. Herpsilochmus longirostris Pelz. 



Rcrpsdochmiis Iniigirostris Pelzeln, Zur Oriiith. Bniiil. ii. p. 150 (1868. — Porto do Rio Parana, Rio 

 Araguay, Cuyabi, Rio Guapore) ; Allen, Bull. Amcr. Mus. v. 1893. p. 120 (Chapada). 



No. 1767. S fere ad., Faz. EsperanQa, January 1906.— Wing 59; tail 56; 

 bill 17J mm. 



Nos. 1768, 1774. i <S juv. (in the plumage of the ?), Faz. Esperan9a, Jannary 

 1906.— Wing 59, 57J ; tail 54, 53i ; bill 16J, 16 mm. 



No. 2351. ? ad., Rio Araguaya, July 1906.— Wing 60 ; tail 55 ; bill 16 mm. 



The specimens agree well with others from Chapada, Mattogrosso. H. longi- 

 rostris is quite distinct from //. p. atricapillus and much more nearly related to 

 H. pectoralis, of which it appears to be the western representative. The two forms 

 are practically identical in structure and proportions, and their females scarcely 

 distinguishable. 



The (J c? of //. longirostris differ from those of the Bahia form by their longer 

 tail, cinereous (instead of black) upper tail-coverts, and by the continuous black 

 jugular band being replaced by numerous small blackish or dark cinereous spots on 

 the foreneck. 



The female of //. pectoralis of Bahia, which has not yet been described, 

 resembles in general coloration that of //. longirostris, having the head bright 

 tawny or tawny ochraceous, and the under-parts ochraceous (darkest on the foreneck 

 and breast, paler on the throat) ; it differs, however, by the upper tail-coverts being 

 brownish olive-grey tipped with white (instead of uniform cinereous), by the back 

 being distinctly washed with brownish olive (instead of clear cinereous or olive-grey), 

 and by its shorter tail. There are many specimens in Count Berlepsch's Museum, 

 and I have also one in ray collection, all of the well-known Bahia-makc. For 

 the sake of comparison I append the measurements of the two species. 



{a) H. pectoralis Scl. 

 7 (?(? ad., Bahia.— Wing 56-60; tail 49—52 ; bill 16— 16i mm. 

 6 ? ? , Bahia.— Wing 53^-56 ; tail 48—50 ; bill 15J— 16 mm. 



