132 



ing beneath and upon the wings. Like F. ccerulescens, this bird has 

 only ten rectrices. 



9. Herpsilochmus pectoralis. 



Cinereus, dorsi medii plumis albo mixtis ; pileo nigra: fronte, 

 superciliis et lateribus capitis albis : alis nigris, tectricum om- 

 nium apicibus albo guttatis, secundariis late, primariis stride 

 albo extus marginatis : cauda nigra, rectricis unce utrinque ex- 

 timce dimidio apicali et proximarum trium apicibus gradatim 

 decrescentibus albis ; rectricibus duabus intermediis extus an- 

 guste albo marginatis et tectricum caudce apicibus quibusdam 

 eodem colore guttatis : subtus obscure cinereus, plaga magna 

 in pectore antico nigro : rostro plumbeo, mandibula inferiore 

 albicante : pedibus nigris. 

 Long, tota 5 - 0, alee 2-1, caudae 1*7. 



My attention was first called to this species when looking through 

 the specimens of this family in the Museum of the Academy of Nat. 

 Sc. of Philadelphia. 



There is also a single specimen in the British Museum, which 

 came, I believe, from the same origin as the one at Philadelphia — 

 that is from the Massena collection. There is no locality affixed. 



In style of colouring this bird seems to come nearest to H. pilea- 

 tus, but it is much larger in size, and the pectoral black patch ren- 

 ders it easily distinguishable from every bird of the family known 

 to me. 



10. Dysithamnus xanthopterin. 



Basythamnus xanthopterus, Burm. Syst. Ueb. d. Th. Bras. iii. 

 p. 81. 



(? . Capite colloque cinereis, fronte, regione superciliari et lateri- 

 bus capitis albo striolatis : interscapulio et alis extus laete 

 rujis, illo dilutiore ; dorso postico valde plumoso, colore virides- 

 centi-rufo, hujus pennarum basibus cinereis : cauda nigricanti- 

 cinerea, rectricibus extus rufescente marginatis : subtus albus, 

 lateribus cervicis cinereis, ventris autem ochracescentibus : rostri 

 nigri mandibula inferiore pallida, pedibus nigris. 

 ? . Mari similis sed pileo rufo et subtus magis fusco-favicans. 

 Long, tota 5*5, alse 2*4, caudae 2*0. 

 Hab. In Brasilia Orientali. 

 Mus. Brit, et P. L. S. 



The British Museum possesses the male, and I have a female speci- 

 men of this Dysithamnus, which is easily recognizable by its deep 

 chestnut-reel wings and back ; the same in both sexes. The bend 

 of the wing and whole of the upper coverts are of this colour, and I 

 could hardly, therefore, at first think it possible that this could be 

 the Dasythamnus xanthopterus of Burmeister (Syst. U^b. d. Th. 

 Bras. iii. p. 81), although his description agrees with the female of 

 my species. But recollecting that £avdbs, though commonly used 

 in Natural History as synonymous with the Latin fiavus and English 



