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Show 48 ZOOLOGY OF TilE VOYAGE OF THE BEAGLE. 3. l\'IYIOBIUS PARVIROSTRIS. Tyrannula parvirostris, Gould, MS. M. supra 1·ujobrunneus; pileo, nuclta ltutne1·isque obscut·e olivaceo-b1·unneis; alis brunneis, prima1·iantnt et secundariarwn marginibus exterius anguste tectricumque late fen·ugineis; cauda guttureque g1·iseo-brunneis; pectore abdomineque .flavescenti brunneis. Long. tot. 4-H- unc. ; ala•, 2-h; caudm, 2-h; tat·si, -h ; rost. -&· Crown of the head, back of the neck, and shoulders, dark olive brown; back and upper tail coverts rufous brown; wings brown ; the external edges of the primaries and secondaries finely, and the greater and lesser wing coverts broadly margined with ferruginous; tail uniform greyish brown; throat brownish grey ; chest and abdomen sandy brown ; upper mandible dark brown ; under mandible yellowish brown; feet blackish brown. Habitat, Tierra del Fuego, Chile, and La Plata. This bird inhabits the forests of Tierra del Fuego, and as I procured specimens of it in the begin~ing of winter (June), it probably remains throughout the year in the extreme southern part of South America. Other specimens were procured on the banks of the Plata, and near Valpamiso in Chile; it bas therefore a wide range. 4. MYIOBIUS MAGNIROSTRTS. PLATE VIII. Tyrannuln. mn.gnirostris. Gould, MS. M. Fmm. Supra olivaceo-brunnea; cauda brunned; t·ect1·icum externat"ttm marginilnts griseo-bntnneis; guttw·e pectm·eque olivaceo g1·iseis; abdomine caud(]Jque tectt·icill'lts inferioribus pallide .flavis; alis saturate brunneis, secu,ndm·iis tect1·icibusque late griseo mat-ginatis. Long tot. 5-b; alO', 2-b ; caudaJ, 2T\ ; tarsi, H ; rost. h· Crown of the bead and back olive brown ; tail brown; the external margins of the two outer feathers greyish brown; throat and chest olive grey ; abdomen and unuer tail coverts very pale citron yellow; wings dark brown; secondaries, greater and lesser wing covellts broadly margined with grey ; bill and feet black. Habitat, Chatham Island, Galapagos Archipelago (Octobet·). This bird and the Pyrocepltalus nanus, inhabit the same island. Not very uncommon. |
