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Show 1866.] COLLECTED O N T H E RIVER UCAYALI. 185 Fam. FORMICARIID.E. 73. T H A M N O P H I L U S MELANURUS, Gould, P. Z. S. 1855, p. 69, pi. LXXXIII., et Ann. N. II. ser. 2. xv. p. 345. Hab. Nauta and Upper and Lower Ucayali. 74. THAMNOPHILUS CORVINUS, Gould. Thamnophilus corvinus, Gould, P. Z. S. 1855, p. 69, et Ann. N. H. ser. 2. xv. p. 345 ( J ). T.melanoceps, Spix, Av. Bras. ii. p. 28, pi. 39. f. 1 ($). Diallactes melanocephalus, Cab. & Heine, Mus. Hein. ii. p. 18 ( 2 )• Thamnophilus melanocephalus, Sclater, Cat. Am. B. p. 172 ( $ ). Hab. Upper Ucayali, near Cashaboya. There can, we think, be no longer any doubt that Spix's T. mela-noceps is the female of Th. corvinus. Mr. Bartlett has obtained examples of each of them in the same locality, and marks all T. corvinus as males, and all T. melanoceps as females. Sclater has already suggested that this would turn out to be the case (P. Z. S. 1S58, p. 210). 75. THAMNOPHILUS HYPERYTHRUS, Gould, P. Z. S. 1855, p. 70. Only one example of this species from the Lower Ucayali. 76. THAMNOPHILUS N^EVIUS (Gm.). Hab. Upper Ucayali. 77. THAMNOPHILUS AMAZONICUS, Sclater. Hab. Upper Ucayali. 78. THAMNOPHILUS ATRICAPILLUS (Gm.). Hab. Upper Ucayali. • 79. THAMNOPHILUS RADIATUS, Vieill. Hab. Sarayacu and Nauta. 80. PYGOPTILA MACULIPENNIS, Sclater. Hab. Upper Ucayali and Sarayacu. Specimens of both sexes of this species. 81. MYRMOTHERULA PYGM^EA (Gm.). Hab. Upper Ucayali. 82. MYRMOTHERULA SURINAMENSIS (Gm.). ^ Hab. Upper Ucayali. 83. MYRMOTHERULA MULTOSTRIATA, Sclater. Hab. Upper Ucayali. 84. MYRMOTHERULA H/EMATONOTA, Sclater, P. Z. S. 1858, p. 235. Hab. Upper Ucayali. A single female of this species, which is certainly distinct from M. PROC. ZOOL. SOC-1866, No. XIII. |