AVES THINOCORYTHID^E. 243 



Tail, 2.3 inches. 



Tarsus, 0.8 inch. 



Color, Adult. General color above dark umber, each feather margined 

 with warm sandy grey and many of the feathers with one or more inner 

 rufous bands following the shape of the 

 feather. Below white except the breast Fio.j39. 



and throat, which are sandy buff with cir- 

 cular black or deep brown markings. 



Head : Forehead, crown and occiput deep 

 umber brown, almost black, each feather bor- 

 dered or margined with sandy rufous. The 

 crown defined by a lighter isabelline eye- 

 brow stripe. Lores and Sides Of face isabel- Attagis malouimts. Natural size. P. 

 line, narrowly streaked with dusky. Auricu- u. O. C. 7989. Adult, 



lar region more rufous and similarly streaked. 



Back : Upper back as described in general color ; the lower back and 

 rump much more closely vermiculated with sandy edges and V-shaped 

 rufous decorations to each feather. Upper tail coverts dusky, particularly 

 near the extremities, and fringed and decorated with sandy buff markings. 



Tail : The rectrices, blackish, tipped with dirty white and irregularly 

 barred with sandy buff. 



Wing : The upper coverts deep umber or blackish, each feather mar- 

 gined with isabelline and decorated with horseshoe or V-shaped rufus 

 markings. The primaries brown, darkening at the ends and with narrow 

 isabelline tips. Outer secondaries similar to the primaries and the inner 

 secondaries margined with isabelline and decorated with rufous marking 

 similar to those of the greater coverts. 



Lower Parts : The throat is almost white, shading into bright sandy rufous 

 on the lower throat, neck and breast, each feather fringed with isabelline and 

 decorated with black circular markings. This coloration ends abruptly on 

 the lower breast, the rest of the lower surface being pure white. The lower 

 tail coverts are isabelline with concealed decorations of dusky color. 



Bill dusky horn, paling on lower mandible near base. 



Feet and legs dusky (P. U. O. C. No. 7989, Patagonia, 15 April, 1899). 



Geographical Range. The Falkland Islands, Tierra del Fuego and 

 lands about the Straits of Magellan. North in southern Patagonia to at 



