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Show 142 MESSRS. SCLATER AND SALVIN [Feb. 13, may remark that Azara (Apunt. ii. p. 250) described these two birds as sexes, although he had already described (/. c. p. 117) the female as a different species. 40. MACHETORNIS RIXOSA (Vieill.); Burm. I.e. p. 458. 41. CENTRITES NIGER (Bodd.) ; Burm. l.c. p. 458. 42. SERPOPHAGA SUBCRISTATA (Vieill.) ; Burm. I. c. p. 454. 43. SERPOPHAGA NIGRICANS (Vieill.) ; Burm. I. c. p. 454. 44. ELAINEA MODESTA (Tsch.); Burm. l.c. p. 454. Agrees with the Chilian birds. See Sclater's notes upon this species, P. Z. S. 1867, p. 327. 45. PITANGUS BELLICOSUS (Vieill.). Saurophagus sulphuratus, Burm. l.c. p. 452. 46. MYIOBIUS NAEVIUS (Bodd.). Not mentioned by Burmeister. Larger than, and possibly distinct from, the northern species (in which case it will, perhaps, stand as M. auriceps, Gould); but our series of specimens is not sufficient for comparison. " Summer visitor." 47. PYROCEPHALUS RUBINEUS (Bodd.). P.parvirostris, Gould ; Burm. I. c. p. 456. " Summer visitor." After comparing a large series of skins of this form from many parts, we only feel satisfied as to the distinguishability of the northern P. mexicanus, which seems always larger in size and paler in colour. 48. TYRANNUS MELANCHOLICUS (Vieill.) ; Burm. I. c. p. 452. " Summer visitor." 49. MILVULUS VIOLENTUS (Vieill.). Tyrannus violentus, Burm. l.c. p. 453. 50. PODAGER NACUNDA, Vieill.; Burm. 1. c. p. 449. 51. STENOPSIS BIFASCIATA, Gould; Sclater, P. Z. S. 1866, p. 140. Antrostomus longirostris, Burm. I. c. p. 450. A single skin of an immature bird, probably referable to this species. 52. GUIRA PIRIRIGUA (Vieill.). Ptiloleptis guira, Burm. I. c. p. 443. "Iris red." |