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  1. By: Cockerell, Theodore D. A. (Theodore Dru Alison), - Bequaert, Joseph C. (Joseph Charles), - Cockerell-Mackie-Ogilvie Expedition
    Publication info: New York City, The American Museum of Natural History, [1936]
    Holding Institution: American Museum of Natural History Library
    Subjects: Africa, Southern  Bees  Classification  Congo (Democratic Republic)  Hylaeus  Insects  Liberia  Metylaeus semlikiensis  Nothylaeus
  2. By: Cockerell, Theodore D. A. (Theodore Dru Alison), - Sumner, Ruth. - Lutz, Frank Eugene,
    Publication info: New York City, The American Museum of Natural History, [1931]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,99(78)  Bees  Classification  Hylaeus  Insects  Rocky Mountains
  3. By: Cockerell, Theodore D. A. (Theodore Dru Alison),
    Publication info: New York City, The American Museum of Natural History, [1937]
    Holding Institution: American Museum of Natural History Library
    Subjects: Angara River Valley  Bees  Classification  Halictus  Hylaeus  Insects  Russia (Federation)  Siberia  Siberia, Eastern  Sphecodes
  1. By: Urban, Danuncia, - Moure, Jesus Santiago
    Type: Article
    In: Revista Brasileira de Zoologia
    Date: 2002-03-01
    Subjects: Colletidae  Hylaeinae  Hylaeus  Hymenoptera  Neotropical  
  2. By: Macedo, Antonio Carlos Cruz - Cordeiro, Guaraci Duran - Alves dos Santos, Isabel
    Type: Article
    In: Revista Brasileira de Entomologia
    Date: 2012-09-01
    Subjects: Evanioidea  Gasteruption  Hylaeus  parasitic wasp  solitary bee