Mr. P. L. Sclater on species of Formicariidse. 465 



superciliis et lateribus capitis albis : alis nigris, tectricum cm,' 

 nium apicibus albo guttatis, secundariis late, primariis stricte 

 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, caudee 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 xanthopterus. 



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

 p. 81. 



^ . Capite colloque cinereiSy fronte, regione superciliari et lateri- 

 bus capitis albo striolatis : interscapulio et alis extus Icete 

 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. 

 ? . Marisimilis sed pileo rufo et subtus magis fusco-j^avicans. 

 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-red 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 Basythamnus xanthopterus of Burmeister (Syst. Ueb. d. Th. 

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

 my species. But recollecting that lavQos, though commonly used 

 in Natural History as synonymous with the hdXiw Jlavus and English 

 " yellow,' is also capable of bearing the meaning " auburn," or even 

 *' chestnut \'' it appears to me that the name ''xanthopterus,'' 

 though eminently calculated to mislead as applied to this bird, is 

 perhaps not sufficiently inaccurate to require to be replaced by a new 

 name. I have therefore retained Professor Burmeister's appellation 

 Ann. ^ Mag. N. Hist. Ser. 2. Vol. xx. 30 



