Type Specimens Of Birds In The American Museum Of Natural History Part 8. Passeriformes: Author Pachycephalidae Author Aegithalidae Author Remizidae Author Paridae Author Sittidae Author Neosittidae Author Certhiidae Author Rhabdornithidae Author Climacteridae Author Dicaeidae Author Pardalotidae Author Nectariniidae, And Author Lecroy, Mary Division of Vertebrate Zoology (Ornithology) American Museum of Natural History (lecroy @ amnh. org) text Bulletin of the American Museum of Natural History 2010 2010-06-03 2010 333 1 178 journal article 0003-0090 Anthoscopus flavifrons ruthae Chapin Anthoscopus flavifrons ruthae Chapin, 1958: 23 (Nyamiringe, a village close to Kabunga, at about 1 ° 39 9 south lat., 28 ° 06 9 east long., alt. 2090 ft , Belgian Congo ). Now Anthoscopus flavifrons ruthae Chapin, 1958 . See Fry et al., 2000: 107–108, and Madge, 2008: 73–74 . HOLOTYPE : AMNH 764870 , adult female, collected at Nyamiringe Village , 2090 ft , ca. 01.39S , 28.06E , Congo ( Kinshasa ), on 2 October 1957 , by James and Ruth Chapin (no. 1531). COMMENTS: Chapin cited his unique field number of the holotype in the original description and noted that he had a single specimen.