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Show 1868.] ON BIRDS FROM CONCHITAS. 139 3. M I M U S CALANDRIA (Lafr. et d'Orb.); Burm. I. c. p. 475. W e are now convinced that Mimus modulator, Gould, is identical with this species. Sclater's Bolivian M. calandria (P. Z. S. 1859, p. 343) seems to differ principally in its smaller dimensions, and is perhaps hardly distinct. 4. POLIOPTILA DUMICOLA (Vieill.). Culicivora dumicola, Burm. I. c. p. 473. "Resident." 5. ANTHUS CORRENDERA (Vieill.). A. rufus, Burm. I. c. p. 474. " Resident." 6. G E O T H L Y P I S VELATA (Vieill.). Two specimens of this species, agreeing with Brazilian skins. Not mentioned by Burmeister. " Summer visitor." 7. P R O G N E TAPERA (Linn.). Colyte tapera, Burm. 1. c. p. 477. H. fusca, Vieill. ex Azara, No. 301. Pheeoprogne fusca, Baird, Rev. A. B. p. 285. Several examples of this species, agreeing with specimens so named in Sclater's collection. W e do not know Baird's P. tapera as distinguished from his P. fusca. 8. HIRUNDO LEUCORRHOA (Vieill.). Cotyle leucorrhcea, Burm. I. c. p. 478. Several examples of this distinct species. H. albilinea of Lawrence is rightly associated by Baird (Rev. A. B. p. 297) with this species, but is readily distinguishable by its smaller size. 9. TANAGRA CYANOPTERA (Vieill.) T. sayaca, Burm. I. c. p. 479. Six skins of this species, all marked females, and without the bright blue on the lesser wing-coverts. 10. T A N A G R A STRIATA (Gm.); Burm. I. c. p. 480. 11. G U I R A C A GLAUCO-CAERULEA (Lafr. et d'Orb.). Coccoborus glaucocceruleus, Burm. I. c. p. 488. Two male specimens only of this highly interesting species. 12. ZONOTRICHIA PILEATA (Bodd.). Z. matulina, Burm. 1. c. p. 486, " Resident," |