Measurements.—Wing, 55; tail, 80 mm.
Synallaxis gujanensis huallagæ subsp. nov.
Type from Lagunas, Lower Huallaga River, Peru. Adult male, No. 50561, Field Museum of Natural History. Collected by M. P. Anderson, October 12, 1912.
Characters.—Similar to S. gujanensis inornata Pelzeln from the Rio Madeira region, Brazil, but differs in having the upper parts and most of under parts (chest and sides) darker (less buffy brown and more grayish brown), and sides of head and sides of throat brownish gray (not pale buffy as in allied forms); coloration of wings and tail darker and more chestnut brown, wing averaging longer.
Measurements.—Wing, 65; tail, 70; culmen, 14 mm.
Synallaxis peruviana sp. nov.
Type from Moyobamba, northern Peru. Female, No. 50564, Field Museum of Natural History. Collected by W. H. Osgood and M. P. Anderson, July 15, 1912.
Characters.—Back and rump grayish olive brown, the feathers of the nape and upper back with narrow whitish shafts; crown feathers with tawny shaft streaks (giving a streaked appearance to the crown) most pronounced on the forehead; under parts tawny buff shading into olive buff on the belly and flanks; breast feathers with blackish streaks and dots; sides of the head streaked with tawny buff and blackish; remiges with outer webs and greater portion of inner webs rufous; terminal third of the inner webs blackish; tail chestnut rufous; under wing coverts bright ochraceous tawny.
Measurements.—Wing, 64; tail, 55; culmen, 13 mm.
Remarks.—This new form is apparently not very closely allied to any known species. It somewhat resembles S. stictothorax from Ecuador and extreme northwestern Peru in size and in having the sides of the neck, and breast, streaked with blackish, but it is otherwise very different.