Volume 20 [42 articles]

• Notes on the Habits of Some Central American Stingless Bees, William Morton Wheeler
  Volume 20 (1913), Issue 1, Pages 1-9
• Meliponine Bees From Central America, T. D. A. Cockerell
  Volume 20 (1913), Issue 1, Pages 10-14
• Mallophaga From Brazilian Birds, Jhon H Paine and William M. Mann
  Volume 20 (1913), Issue 1, Pages 15-23
• A New Genus and Three New Species of Phoridae From North America, With Notes on Two Recently Erected Genera (Crepidopa Achys and Pronomiophora Enderlein), J. R. Malloch
  Volume 20 (1913), Issue 1, Pages 23-26
• New North American Elateridae and Scarabaeidae, H. F. Wickham
  Volume 20 (1913), Issue 1, Pages 27-31
• A Giant Coccid From Guatemala, William Morton Wheeler
  Volume 20 (1913), Issue 1, Pages 31-33
• Species of the Genus Gaurax of the Eastern United States, Charles W. Johnson
  Volume 20 (1913), Issue 1, Pages 34-35
• Positive Thigmotropism of Culex Pipiens in Hibernation, Harry B. Weiss
  Volume 20 (1913), Issue 1, Pages 36-37
• Peculiar Habits of Small Diptera, Desmometopa Latipes Meig, C. A. Frost
  Volume 20 (1913), Issue 1, Pages 37-37
• An Undescribed Hymenopterous Parasite of the Housefly, C. H. Richardson Jr.
  Volume 20 (1913), Issue 1, Pages 38-39